CN217602913U - Pump device and vehicle - Google Patents
Pump device and vehicle Download PDFInfo
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- CN217602913U CN217602913U CN202220790365.9U CN202220790365U CN217602913U CN 217602913 U CN217602913 U CN 217602913U CN 202220790365 U CN202220790365 U CN 202220790365U CN 217602913 U CN217602913 U CN 217602913U
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Abstract
The utility model provides a pump unit and vehicle, pump unit includes: the oil pump comprises a shell, a pump body and a pump cover, wherein the shell comprises a motor cavity and a pump cavity, and the pump cavity is communicated with an oil inlet and an oil outlet; the motor part is arranged in the motor cavity, a gap is formed in the motor part, and the motor part divides the motor cavity into a first cavity and a second cavity; the pump part is arranged in the pump cavity, the pump part and the shell enclose a first pressure cavity and a second pressure cavity, and the pressure borne by the first pressure cavity, the first cavity and the second pressure cavity is reduced in sequence; the oil inlet, the second pressure cavity, the first pressure cavity and the oil outlet are communicated in sequence to form a first oil way; the first pressure cavity, the first cavity, the gap, the second cavity, the gap, the first cavity, the second pressure cavity and the first pressure cavity are communicated in sequence to form a second oil path. The utility model provides a pump unit realizes the circulation of fluid in pump chamber and motor chamber for the heat of motor portion is taken away to fluid, has accelerated the heat dissipation of motor portion.
Description
Technical Field
The utility model relates to a pump unit technical field particularly, relates to a pump unit and a vehicle.
Background
At present, an electronic oil pump adopts a bearing seal to isolate a pump part of the oil pump from a motor part, so that the manufacturing cost is high and the cooling effect of the motor part is poor.
SUMMERY OF THE UTILITY MODEL
The present invention aims at least solving one of the technical problems existing in the prior art or the related art.
To this end, a first aspect of the present invention provides a pump device.
The second aspect of the present invention also provides a vehicle.
In view of this, a first aspect of the present invention provides a pump apparatus, including: the oil pump comprises a shell, wherein an oil inlet and an oil outlet are formed in the shell, the shell comprises a motor cavity and a pump cavity, and the pump cavity is communicated with the oil inlet and the oil outlet; the motor part is arranged in the motor cavity, a gap is formed in the motor part, the motor cavity is divided into a first cavity and a second cavity by the motor part, the first cavity is communicated with the second cavity through the gap, and the first cavity is communicated with the pump cavity; the pump part is arranged in the pump cavity and is connected with the motor part. The pump part and the shell enclose a first pressure cavity and a second pressure cavity, and the pressure borne by the first pressure cavity, the first cavity and the second pressure cavity is reduced in sequence; the oil inlet, the second pressure cavity, the first pressure cavity and the oil outlet are communicated in sequence to form a first oil way; the first pressure cavity, the first cavity, the gap, the second cavity, the gap, the first cavity, the second pressure cavity and the first pressure cavity are communicated in sequence to form a second oil path.
The utility model provides a pump unit, casing include motor chamber and pump chamber, and motor portion sets up in the motor chamber, and pump portion sets up in the pump chamber, makes motor portion and pump portion can the reliable operation, avoids external environment to disturb. The motor portion is connected with the pump portion, and motor portion operation back drive pump portion rotates for fluid gets into the pump chamber by the inlet port, flows by the oil outlet under the effect of pump portion, and then realizes the pumping of fluid. Wherein, motor portion sets up in the motor chamber to separate the motor chamber for first cavity and second cavity, motor portion has the clearance, first cavity and second cavity pass through the clearance intercommunication, and first cavity and pump chamber intercommunication, like this, fluid in the pump chamber can get into in the first cavity, then flow in the second cavity through the clearance of motor portion, and then flow to first cavity by the second cavity flow direction, then flow to the pump chamber, realize the circulation of fluid in pump chamber and motor chamber, make fluid take away the heat of motor portion, the heat dissipation of motor portion has been accelerated.
In this design, pump portion and casing enclose first pressure chamber and second pressure chamber, inlet port and second pressure chamber intercommunication, oil outlet and first pressure chamber intercommunication, wherein, the inlet port, the second pressure chamber, first pressure chamber and oil outlet communicate in proper order and constitute first oil circuit, like this, when motor portion and pump portion move, under the effect of pump portion, the pressure in first pressure chamber is higher, pressure in the second pressure chamber is lower, consequently, liquid can be by the inlet port by the lower second pressure chamber of suction pressure, then by the extrusion to first pressure chamber under the effect of pump portion, and then by first pressure chamber flow direction oil outlet, realize the pumping of liquid.
Meanwhile, the first pressure cavity, the first cavity, the gap, the second cavity, the gap, the first cavity, the second pressure cavity and the first pressure cavity are sequentially communicated to form a second oil circuit, wherein the pressure borne by the first pressure cavity, the first cavity and the second pressure cavity is sequentially reduced, so that under the action of pressure difference, oil flows to the first cavity from the first pressure cavity, then flows to the second cavity from the gap of the motor part, then flows to the first cavity from the second cavity through the gap, and further flows to the first pressure cavity, so that the oil flows between the second pressure cavity, the first cavity, the second cavity and the second pressure cavity, further takes away heat of the motor part, and the heat dissipation of the motor part is accelerated. Besides, under the action of pressure difference, oil around the motor part flows, and heat dissipation of the motor part is accelerated.
That is, according to the technical scheme provided by the application, the pump device comprises the first oil path and the second oil path. First oil circuit includes inlet port, second pressure chamber, first pressure chamber and oil outlet, under the drive of pump portion, realizes the flow of fluid, and then realizes the pumping of fluid. The second oil circuit comprises a first pressure cavity, a first cavity, a gap, a second cavity, a gap, a first cavity, a second pressure cavity and a first pressure cavity, under the action of pressure difference, oil sequentially passes through the first pressure cavity, the first cavity, the gap, the second cavity, the gap, the first cavity and the second pressure cavity, and finally flows back to the first pressure cavity, so that the oil circularly flows, and most heat of the motor part is taken away.
It can be understood that the pressure that first pressure chamber bore is greater than the pressure that the second pressure chamber bore, and the pressure that also is the second pressure chamber is lower, forms the suction to fluid, and then fluid is by inlet port flow direction second pressure chamber to, under the effect of pump portion, fluid constantly flows to first pressure chamber, makes first pressure chamber pressure crescent, and then extrudees fluid to the oil outlet, and discharge pump device realizes fluid along the flow of first oil circuit. The pressures of the first pressure cavity, the first cavity and the second pressure cavity are gradually reduced, so that the oil flows along the second oil path under the action of the pressure difference.
It will be appreciated that the first pressure chamber is a high pressure chamber and the second pressure chamber is a low pressure chamber.
Meanwhile, the motor part is communicated with the pump cavity, so that oil can enter the motor part, the motor cavity is not required to be sealed with the pump cavity, the number of oil seal parts of the pump device is reduced, and the production cost is reduced.
Specifically, the pump cavity, the first cavity and the second cavity are distributed along the axial direction of the motor part. Further, the first cavity is located between the second cavity and the pump cavity in the axial direction of the motor part.
In specific application, the motor cavity is filled with oil, and the motor part is immersed in the motor cavity filled with the oil. Wherein, the clearance is full of oil.
According to the utility model provides a pump device can also have following additional technical characterstic:
in some possible designs, the pump device further comprises: the rotating shaft is arranged in the shell, and the motor part and the pump part are connected with the rotating shaft; the bearing is connected with the shell, the rotating shaft is arranged in a shaft hole of the bearing, a third pressure cavity is formed among the bearing, the rotating shaft and the pump part and is communicated with the first pressure cavity, a first oil groove is arranged on the bearing, a second oil groove is arranged on the shell, the first oil groove is communicated with the third pressure cavity and the first cavity, and the second oil groove is communicated with the first cavity and the second pressure cavity; the pressure born by the first pressure cavity, the third pressure cavity, the first cavity and the second pressure cavity is decreased gradually in sequence.
In this design, pump unit still includes pivot and bearing, and the bearing is connected with the casing, and the pivot setting is in the bearing, with bearing normal running fit, and motor portion and pump portion all are connected with the pivot, like this, when motor portion moves, the drive pivot rotates, and then the pivot drives pump portion and moves, realizes the pumping to fluid. Wherein, form the third pressure chamber between bearing, pivot and the pump portion, first pressure chamber of third pressure chamber intercommunication and first cavity, specifically, the third pressure chamber is through straight oil groove and first cavity intercommunication for fluid can be by straight oil groove flow to first cavity, and then flow to the second cavity through the clearance. The oil return groove is communicated with the first cavity and the second pressure cavity. Simultaneously, because first pressure chamber, the third pressure chamber, first cavity, the pressure that the second pressure chamber bore is decreased progressively in proper order, consequently, fluid is under the effect of pressure difference, by first pressure chamber flow direction third pressure chamber, then flow to first cavity through straight oil groove, and then flow to the second cavity through the clearance, flow back to first cavity through the clearance by the second cavity again, rethread oil return groove flow direction second pressure chamber, then by the first pressure chamber of extrusion under the effect of pump portion, realize the circulation flow of fluid, most heat of motor portion has been taken away.
It can be understood that the bearing, the rotating shaft and the pump portion form a third pressure cavity, the third pressure cavity is communicated with the first pressure cavity and the first cavity, and the first cavity is communicated with the second pressure cavity through the oil return groove, so that the second oil path specifically comprises the first pressure cavity, the third pressure cavity, the first oil groove, the first cavity, the gap, the second cavity, the gap, the first cavity, the second oil groove, the second pressure cavity and the first pressure cavity.
Specifically, first oil groove is straight oil groove, and the second oil groove is for returning the oil groove, and further, first oil groove is the straight line form extension along the axis direction of pivot.
Further, the bearing comprises a sliding bearing, the sliding bearing is a bearing which works under sliding friction, compared with a rolling bearing, the sliding bearing works stably, reliably and noiselessly, under the condition of liquid lubrication, the sliding surface is separated by lubricating oil and does not directly contact with the lubricating oil, the friction loss and the surface abrasion can be greatly reduced, in addition, the lubricating oil is filled in the gap between the sliding bearing and the rotating shaft, a layer of oil film can be formed on the sliding surface, the fluid lubrication is realized, the oil film also has certain vibration absorption capacity, and the service life of the bearing and the rotating shaft is prolonged.
In some possible designs, a third oil groove is further formed in the shell, and the first pressure cavity is communicated with the third pressure cavity through the third oil groove.
In this design, still be provided with the third oil groove on the casing, first pressure chamber of third oil groove intercommunication and third pressure chamber, consequently, under the effect of pressure difference, fluid in the first pressure chamber is extruded into the third pressure chamber through the third oil groove, then flows to first cavity through first oil groove, again through clearance flow direction second cavity, then through clearance and first cavity flow direction second pressure chamber, take away the most heat of motor portion, improve the radiating effect of motor portion.
Specifically, the third pressure chamber is a medium pressure chamber, and the third oil groove is a throttling groove.
It can be understood that, the pump device includes first oil circuit and second oil circuit, first oil circuit is including the inlet port that communicates in proper order, the second pressure chamber, first pressure chamber and oil outlet, the pump portion operation back, form first pressure chamber and second pressure chamber, the pressure of second pressure chamber is lower, consequently outside fluid is by the inlet port flow direction second pressure chamber, then extrude into first pressure chamber, and then flow out by the oil outlet, that is, fluid is by the inlet port flow direction second pressure chamber, then flow to first pressure chamber and then flow out the oil outlet, realize the flow of first oil circuit. The second oil way comprises a first pressure cavity, a throttling groove, a third pressure cavity, a straight oil groove, a first cavity, a gap, a second cavity, a gap, a first cavity, a return oil groove and a second pressure cavity which are sequentially communicated, wherein the pressure of the first pressure cavity, the third pressure cavity, the first cavity and the second pressure cavity is gradually reduced, so that oil sequentially flows through the throttling groove, the third pressure cavity, the straight oil groove, the first cavity, the gap, the second cavity, the gap, the first cavity, the return oil groove and the second pressure cavity from the first pressure cavity under the action of pressure difference to realize the circulation of the second oil way.
In some possible designs, the inner wall surface of the pump cavity is provided with a first groove and a second groove, the first groove and the pump part enclose a first pressure cavity, and the second groove and the pump part enclose a second pressure cavity; the first groove is communicated with the third oil groove, and the second groove is communicated with the second oil groove.
In the design, a first groove and a second groove are arranged on the inner wall surface of the pump cavity, the first groove and the pump part enclose a first pressure cavity, and the second groove and the pump part enclose a second pressure cavity. Through the setting of first recess, balanced everywhere pressure in the first pressure chamber, through the setting of second recess, balanced everywhere pressure in the second pressure chamber. Wherein, first recess and third oil groove intercommunication for first pressure chamber and third pressure chamber intercommunication, and then realize the flow of fluid. The second groove is communicated with the second oil groove, so that the first cavity is communicated with the second pressure cavity, and oil in the first cavity can flow into the second pressure cavity, most heat of the motor part is taken away, and the heat dissipation effect of the motor part is improved.
The pump section is a gear pump including an internal gear and an external gear that mesh with each other. In the process of meshing transmission of the internal gear and the external gear, a plurality of high-pressure areas and a plurality of low-pressure cavity areas are formed, the first grooves communicate the high-pressure areas together to form a first pressure cavity, namely a high-pressure cavity, so that the pressure in the high-pressure areas is more balanced. The second groove communicates a plurality of low-pressure areas together to form a second pressure cavity, namely, a low-pressure cavity, so that the pressure in the low-pressure areas is more balanced, the pressure in the high-pressure cavity and the pressure in the low-pressure cavity are prevented from increasing or decreasing steeply, and the noise generated when the pump device operates is further reduced.
Further, the gear pump includes a first gear and a second gear, the first gear is an internal gear, and the second gear is an external gear. First gear and pivot fixed connection, second gear setting are in the first gear outside, and like this, when motor portion moves, drive the pivot and rotate, and the pivot drives the first gear rotation of fixing on it, and first gear and second gear meshing realize the operation of pump portion.
Further, the first gear is in interference fit with the rotating shaft.
In some possible designs, the bearing includes: a bearing body; the extension section, along the axial of bearing, the at least one end of bearing body is located to the extension section, is equipped with the shaft hole on bearing body and the extension section, and bearing body and extension section are run through along the axis direction of pivot to first oil groove.
In this design, the bearing includes bearing body and extension, is provided with the shaft hole on extension and the bearing body, and like this, when the bearing is connected with the pivot, the pivot is worn to establish in the shaft hole for the extension can contact with the pivot, and then can avoid bearing department stress concentration problem, reduces the wearing and tearing of bearing simultaneously, promotes bearing life.
It can be understood that the flexible design of the bearing is realized by arranging the extension section on the bearing, and the rotating shaft is matched with the bearing to realize the rotating connection of the rotating shaft and the bearing. When the rotating shaft does not drive the load to rotate, gaps are formed between the rotating shaft and the bearing, when the rotating shaft drives the load to rotate, the rotating shaft can move along the radial direction to cause the gaps between the rotating shaft and the bearing to change, the pressure of the axial end part of the bearing is larger at the moment, when the rotating shaft generates radial unbalance loading, the rotating shaft can transmit the radial unbalance loading force to the extension section, and the extension section can deform under the action of the radial unbalance loading force, so that the radial unbalance loading force is effectively buffered, the problem of local stress concentration on the bearing is avoided, the abrasion of the bearing is reduced, the rotating shaft is in flexible contact with the bearing, the contact area between the rotating shaft and the bearing is increased, the surface pressure is reduced, the abrasion rate of the bearing is reduced, and the damage rate of the bearing is effectively reduced.
In specific application, the bearing body and the extension section are designed in an integrated mode, and the bearing body and the extension section are manufactured integrally.
In some possible designs, the rotating shaft comprises a stepped shaft comprising a first shaft section, a second shaft section and a third shaft section connected in sequence; the first shaft section is connected with the pump part, the second shaft section is connected with the bearing, and the third shaft section is connected with the motor part.
In this design, the pivot includes the step shaft, and the step shaft is including the first shaft part, second shaft part and the third shaft part that connect gradually, and wherein, pump portion sets up on first shaft part, and the bearing setting is on the second shaft part, and motor part sets up on the third shaft part for pump portion, bearing and motor part cooperate with the pivot respectively along the axis direction of pivot, have guaranteed pump portion and motor part steady operation. Meanwhile, the stepped shaft has the effect of assembly limiting, and the design and the use of an assembly tool can be reduced.
In some possible designs, a first shoulder is provided between the first shaft section and the second shaft section, and a second shoulder is provided between the second shaft section and the third shaft section; the first shaft shoulder is provided with a first tool withdrawal groove, and the second shaft shoulder is provided with a second tool withdrawal groove.
In this design, form first shaft shoulder between first shaft part and the second shaft part, be formed with the second shaft shoulder between second shaft part and the third week section, through the setting of first shaft shoulder, can be effectively spacing in the epaxial position of commentaries on classics of pump portion, the setting of second shaft shoulder can be effectively spacing to motor portion assembly, is favorable to reducing the use of spacing frock. Wherein, be provided with first tool withdrawal groove on the first shaft shoulder, be provided with the second tool withdrawal groove on the second shaft shoulder, the intensity that first tool withdrawal groove was located is favorable to improving to being provided with of first tool withdrawal groove, and the intensity that the second shaft shoulder was located is favorable to improving to being provided with of second tool withdrawal groove, and then is favorable to increasing the intensity of pivot.
In some possible designs, the motor section includes: the rotor is connected with the rotating shaft and is positioned on the peripheral side of the rotating shaft; the stator is positioned outside the rotor and is rotationally connected with the rotor, and a gap is formed between the rotor and the stator.
In this design, the motor portion includes a stator and a rotor, the rotor is connected to the rotating shaft, and the stator is located outside the rotor and is rotatably connected to the rotor. After the power is switched on, the rotor drives the rotating shaft to rotate under the action of the magnetic field, so that the driving of the pump device is realized.
Wherein, have the clearance between rotor and the stator, on the one hand, the clearance has guaranteed that the rotor can rotate, avoids taking place to interfere between rotor and the stator, and on the other hand, the setting in clearance provides the passageway for the flow of second oil circuit for first cavity and second cavity intercommunication, and then take away the heat of motor portion through the flow of fluid for the heat dissipation of motor portion.
In a particular application, the stator also has windings thereon.
Further, the rotor is fixed on the rotating shaft.
In some possible designs, the shell further comprises an electric control cavity, the electric control cavity is positioned on one side of the motor cavity far away from the pump cavity, and the motor cavity is communicated with the electric control cavity; the pump device further comprises an electric control part, the electric control cavity is arranged in the electric control part, and the electric control part is electrically connected with the motor part.
In this design, the casing still includes the automatically controlled chamber, along the axis of rotation direction of motor portion, and the automatically controlled chamber is located the one side that the pump chamber was kept away from in the motor chamber, and the automatically controlled portion sets up at automatically controlled intracavity, and automatically controlled portion is connected with motor portion mutually, and then realizes the control to the operation of motor portion, and wherein, the motor chamber is linked together with automatically controlled chamber for the interior fluid of motor chamber can take away the heat of automatically controlled intracavity, and then realizes the heat dissipation of automatically controlled portion.
In some possible designs, the electric control part is coated in a sealant, and the sealant is used for separating the electric control part from oil in the motor cavity.
In this design, the automatically controlled portion is sealed through sealed glue and motor chamber for the oil of automatically controlled portion and motor intracavity is isolated completely, avoids oil to damage automatically controlled portion, guarantees the reliability of automatically controlled portion. In addition, the sealant can bond the electric control part and the electric control cavity together while playing a role in sealing, namely, the electric control part and the electric control cavity are connected, so that other parts are not needed to fix the electric control part, the use of parts is reduced, the installation is simplified, and the production cost is reduced.
Specifically, the electric control part is completely embedded in the sealant.
In some possible designs, the housing includes: the motor comprises a shell, a motor cavity, a pump cavity and an electric control cavity of the shell; the first cover body is covered on the pump cavity and is provided with an oil inlet and an oil outlet; the second cover body is covered on the electric control cavity.
In this design, the housing includes a case, a first cover, and a second cover. A motor cavity, a pump cavity and an electric control cavity are formed in the machine shell, the motor part is arranged in the electric control cavity, the pump part is arranged in the pump cavity, and the electric control part is arranged in the electric control cavity. The two ends of the machine shell are respectively sealed by the first cover body and the second cover body, and the motor part, the pump part and the electric control part are limited in the machine shell. Wherein, be provided with inlet port and oil outlet on the first lid, fluid gets into the pump chamber by the inlet port, then flows out the pump chamber by the oil outlet.
Furthermore, the first end of the machine shell is provided with a sinking groove, at least one part of the electric control part is arranged in the sinking groove, the installation of the electric control part is realized, meanwhile, the whole length of the pump device can be reduced, and the miniaturization of the pump device is realized. The electric control part is sealed with the casing through the sealant, so that the electric control part can be fixed in a sink groove of the casing, the sealing of the joint between the electric control part and the casing is also ensured, and the engine oil in the pump device is prevented from entering the electric control part to cause the damage of the electric control part.
In some possible designs, a flange is arranged on the outer side wall of the machine shell, and a sealing groove and a connecting hole are formed in the flange.
In this design, a flange is provided on the outer side wall of the casing, through which flange the pump unit can be mounted. Wherein, be provided with the seal groove on the flange, mountable sealing member in the seal groove, or hold sealed glue. The flange is connected with other structures through the connecting hole.
In some possible designs, a weight-reducing slot is provided in the housing.
In the design, the casing is provided with the weight reduction groove so as to achieve the effect of reducing the whole weight of the pump device, reduce the material consumption and reduce the production cost.
In some possible designs, a plug-in slot is further provided on the housing for receiving the connector.
In the design, a plug-in groove is formed in the shell, and a connector is placed in the plug-in groove to electrically connect the connector with the electric control part.
In some possible designs, the plug-in groove is provided with a glue injection hole, and the glue injection hole is communicated with the electric control cavity.
In this design, set up the injecting glue hole on the plug-in components groove, and then accessible injecting glue hole is to the injecting glue in the automatically controlled chamber, realizes the sealed of automatically controlled portion and electrically controlled chamber.
According to the utility model discloses a second aspect still provides a vehicle, include: the pump device according to any of the above aspects of the first aspect.
The utility model discloses the vehicle that the second aspect provided, because of the pump unit who proposes including any technical scheme of above-mentioned first aspect, consequently have all beneficial effects of pump unit.
It is worth to say that the vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, a range-extended electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.
Specifically, the pump device is an electronic oil pump.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 shows a schematic structural view of a pump device according to an embodiment of the present invention;
FIG. 2 shows a schematic structural view at A of the pump device of the embodiment of FIG. 1;
fig. 3 shows another schematic structural view of a pump device according to an embodiment of the present invention;
fig. 4 shows a further schematic structural view of a pump device according to an embodiment of the invention;
fig. 5 shows a schematic structural diagram of a housing according to an embodiment of the present invention;
fig. 6 is another schematic structural diagram of the housing according to an embodiment of the present invention;
fig. 7 shows a schematic structural view of a rotating shaft according to an embodiment of the present invention;
fig. 8 shows another schematic structural diagram of the rotating shaft according to an embodiment of the present invention;
fig. 9 shows a schematic structural view of the embodiment of fig. 8 at B.
Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 9 is:
1 shell, 10 oil inlet holes, 11 oil outlet holes, 12 motor cavities, 120 first cavities, 122 second cavities, 13 pump cavities, 130 first grooves, 132 second grooves, 134 wear reduction grooves, 14 second oil grooves, 15 third oil grooves, 16 electric control cavities, 17 machine shells, 170 flanges, 172 sealing grooves, 174 connecting holes, 176 weight reduction grooves, 178 plug-in component grooves, 179 glue injection holes, 18 first cover bodies, 19 second cover bodies, 2 motor parts, 20 gaps, 22 rotors, 24 stators, 3 pump parts, 4 rotating shafts, 41 first shaft sections, 42 second shaft sections, 43 third shaft sections, 44 first shaft shoulders, 45 second shaft shoulders, 46 first tool withdrawal grooves, 47 second tool withdrawal grooves, 5 bearings, 50 bearing bodies, 52 extension sections, 54 first oil grooves and 6 electric control parts.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
Pump arrangements and vehicles according to some embodiments of the present invention are described below with reference to fig. 1 to 9.
As shown in fig. 1 and 2, according to a first embodiment of the present invention, there is provided a pump device including: a casing 1, a pump section 3, and a motor section 2.
Specifically, an oil inlet 10 and an oil outlet 11 are arranged on the shell 1, the shell 1 comprises a motor cavity 12 and a pump cavity 13, and the pump cavity 13 is communicated with the oil inlet 10 and the oil outlet 11; the motor part 2 is arranged in the motor cavity 12, the motor part 2 is provided with a gap 20, the motor cavity 12 is divided into a first cavity 120 and a second cavity 122 by the motor part 2, the first cavity 120 is communicated with the second cavity 122 through the gap 20, and the first cavity 120 is communicated with the pump cavity 13; the pump section 3 is provided in the pump chamber 13, and the pump section 3 is connected to the motor section 2.
The utility model provides a pump unit, casing 1 include motor chamber 12 and pump chamber 13, and motor portion 2 sets up in motor chamber 12, and pump portion 3 sets up in pump chamber 13 for motor portion 2 and pump portion 3 can the reliable operation, avoid external environment to disturb. The motor part 2 is connected with the pump part 3, and the motor part 2 drives the pump part 3 to rotate after running, so that oil enters the pump cavity 13 from the oil inlet hole 10 and flows out from the oil outlet hole 11 under the action of the pump part 3, and the pumping of the oil is further realized. Wherein, motor part 2 sets up in motor chamber 12 to separate motor chamber 12 for first cavity 120 and second cavity 122, motor part 2 has clearance 20, first cavity 120 and second cavity 122 are through clearance 20 intercommunication, and first cavity 120 communicates with pump chamber 13, like this, fluid in pump chamber 13 can get into in first cavity 120, then flow into second cavity 122 through clearance 20 of motor part 2, and then flow to first cavity 120 by second cavity 122, then flow to pump chamber 13, realize the circulation of fluid in pump chamber 13 and motor chamber 12, make fluid take away the heat of motor part 2, the heat dissipation of motor part 2 has been accelerated.
Meanwhile, the motor part 2 is communicated with the pump cavity 13, so that oil can enter the motor part 2, the motor cavity 12 does not need to be sealed with the pump cavity 13, the number of oil seal parts of the pump device is reduced, and the production cost is reduced.
Specifically, the pump chamber 13, the first cavity 120, and the second cavity 122 are distributed along the axial direction of the motor section 2. Further, the first chamber 120 is located between the second chamber 122 and the pump chamber 13 in the axial direction of the motor portion 2.
In a specific application, the motor cavity 12 is filled with oil, and the motor part 2 is immersed in the motor cavity 12 filled with oil. Wherein the clearance 20 is filled with oil.
The pump part 3 and the shell 1 enclose a first pressure cavity and a second pressure cavity, and the pressure borne by the first pressure cavity, the first cavity 120 and the second pressure cavity is reduced in sequence; the oil inlet hole 10, the second pressure cavity, the first pressure cavity and the oil outlet hole 11 are communicated in sequence to form a first oil way; the first pressure chamber, the first chamber 120, the gap 20, the second chamber 122, the gap 20, the first chamber 120, the second pressure chamber, and the first pressure chamber are sequentially communicated to form a second oil path.
In this design, pump portion 3 closes with casing 1 and encloses first pressure chamber and second pressure chamber, inlet port 10 and second pressure chamber intercommunication, oil outlet 11 and first pressure chamber intercommunication, wherein, inlet port 10, second pressure chamber, first pressure chamber and oil outlet 11 communicate in proper order and constitute first oil circuit, like this, when motor portion 2 and pump portion 3 operation, under the effect of pump portion 3, the pressure in the first pressure chamber is higher, the pressure in the second pressure chamber is lower, consequently, liquid can be by the lower second pressure chamber of inlet port 10 sucked pressure, then by the extrusion to first pressure chamber under the effect of pump portion 3, and then by first pressure chamber flow direction oil outlet 11, realize the pumping of liquid.
Meanwhile, the first pressure cavity, the first cavity 120, the gap 20, the second cavity 122, the gap 20, the first cavity 120, the second pressure cavity and the first pressure cavity are sequentially communicated to form a second oil path, wherein the pressure borne by the first pressure cavity, the first cavity 120 and the second pressure cavity is sequentially reduced, so under the action of pressure difference, the oil flows from the first pressure cavity to the first cavity 120, then flows from the gap 20 of the motor part 2 to the second cavity 122, then flows from the second cavity 122 to the first cavity 120 through the gap 20, and further flows to the first pressure cavity, so that the oil flows among the second pressure cavity, the first cavity 120, the second cavity 122 and the second pressure cavity, further carries away the heat of the motor part 2, and accelerates the heat dissipation of the motor part 2. And, under the effect of pressure differential for the fluid realization around the motor part 2 flows, has accelerated the giving off of motor part 2 heat.
That is, in the embodiments presented herein, the pump device includes the first oil passage and the second oil passage. The first oil path comprises an oil inlet hole 10, a second pressure cavity, a first pressure cavity and an oil outlet hole 11, and oil liquid flows under the driving of the pump part 3, so that the pumping of the oil liquid is realized. The second oil path comprises a first pressure cavity, a first cavity 120, a gap 20, a second cavity 122, a gap 20, a first cavity 120, a second pressure cavity and a first pressure cavity, under the action of pressure difference, oil sequentially passes through the first pressure cavity, the first cavity 120, the gap 20, the second cavity 122, the gap 20, the first cavity 120 and the second pressure cavity, and finally flows back to the first pressure cavity, so that the circulating flow of the oil is realized, and most heat of the motor part 2 is taken away.
It can be understood that the pressure that first pressure chamber bore is greater than the pressure that the second pressure chamber bore, and the pressure that also is the second pressure chamber is lower, forms the suction to fluid, and then fluid is by inlet port 10 flow direction second pressure chamber to, under the effect of pump portion 3, fluid constantly flows to first pressure chamber, makes first pressure chamber pressure increase gradually, and then extrudees fluid to oil outlet 11, discharges the pump unit, realizes fluid along the flow of first oil circuit. The pressures of the first pressure chamber, the first chamber 120, and the second pressure chamber are gradually reduced, and thus, the flow of the oil along the second oil passage is achieved under the action of the pressure difference.
It will be appreciated that the first pressure chamber is a high pressure chamber and the second pressure chamber is a low pressure chamber.
As shown in fig. 3 and 4, according to the second embodiment of the present invention, on the basis of the second embodiment, further: the pump device further comprises: the rotating shaft 4 is arranged in the shell 1, and the motor part 2 and the pump part 3 are connected with the rotating shaft 4; the bearing 5 is connected with the shell 1, the rotating shaft 4 is arranged in a shaft hole of the bearing 5, a third pressure cavity is formed among the bearing 5, the rotating shaft 4 and the pump part 3 and is communicated with the first pressure cavity, a first oil groove 54 is arranged on the bearing 5, a second oil groove 14 is arranged on the shell 1, the third pressure cavity and the first cavity 120 are communicated with the first oil groove 54, and the first cavity 120 and the second pressure cavity are communicated with the second oil groove 14; the pressure born by the first pressure cavity, the third pressure cavity, the first cavity 120 and the second pressure cavity is decreased progressively in sequence.
In this design, pump unit still includes pivot 4 and bearing 5, and bearing 5 is connected with casing 1, and pivot 4 sets up in bearing 5, with bearing 5 normal running fit, and motor portion 2 and pump portion 3 all are connected with pivot 4, like this, when motor portion 2 moves, drive pivot 4 rotates, and then pivot 4 drives the operation of pump portion 3, realizes the pump sending to fluid. Wherein, form the third pressure chamber between bearing 5, pivot 4 and the pump portion 3, the first pressure chamber of third pressure chamber intercommunication and first cavity 120, specifically, the third pressure chamber passes through straight oil groove and first cavity 120 intercommunication for fluid can be by straight oil groove flow to first cavity 120, and then flows to second cavity 122 through clearance 20. The oil return groove communicates the first chamber 120 and the second pressure chamber. Meanwhile, because the pressure born by the first pressure cavity, the third pressure cavity, the first cavity 120 and the second pressure cavity is decreased gradually in sequence, therefore, the oil flows to the third pressure cavity from the first pressure cavity under the action of pressure difference, then flows to the first cavity 120 through the straight oil groove, further flows to the second cavity 122 through the gap 20, flows back to the first cavity 120 through the gap 20 from the second cavity 122, flows to the second pressure cavity through the oil return groove, and is extruded into the first pressure cavity under the action of the pump part 3, the circulating flow of the oil is realized, and most of heat of the motor part 2 is taken away.
It is understood that the bearing 5, the rotating shaft 4, and the pump portion 3 constitute a third pressure chamber, the third pressure chamber communicates with the first pressure chamber and the first chamber 120, and the first chamber 120 communicates with the second pressure chamber through the oil return groove, and therefore, the second oil path is specifically constituted by the first pressure chamber, the third pressure chamber, the first oil groove 54, the first chamber 120, the gap 20, the second chamber 122, the gap 20, the first chamber 120, the second oil groove 14, the second pressure chamber, and the first pressure chamber.
Specifically, the first oil groove 54 is a straight oil groove, the second oil groove 14 is a return oil groove, and further, the first oil groove 54 extends linearly along the axial direction of the rotating shaft 4.
Further, the bearing 5 includes a sliding bearing 5, the sliding bearing 5 refers to a bearing 5 operating under sliding friction, compared with the form of the rolling bearing 5, the sliding bearing 5 operates stably, reliably and noiselessly, under the condition of liquid lubrication, the sliding surface is separated by the lubricating oil without direct contact, the friction loss and the surface abrasion can be greatly reduced, in addition, the gap 20 between the sliding bearing 5 and the rotating shaft 4 is filled with the lubricating oil, a layer of oil film can be formed on the sliding surface, the fluid lubrication is realized, the oil film also has certain shock absorption capacity, and the service life of the bearing 5 and the rotating shaft 4 is prolonged.
Further, the first oil groove 54 is provided on the inner wall surface of the shaft hole, the first oil groove 54 penetrates the bearing 5 in the axial direction, and the first oil groove 54 communicates with the shaft hole.
In this design, be provided with first oil groove 54 on the inside wall in shaft hole, first oil groove 54 runs through bearing 5 along the axis direction in shaft hole, setting through first oil groove 54, make liquid can follow first oil groove 54 circulation, wherein, first oil groove 54 and shaft hole intercommunication, thus, oil can be full of in the gap between first oil groove 54 and bearing 5 and pivot 4, can play lubricated effect, reduce the wearing and tearing between bearing 5 and the pivot 4, especially, pivot 4 is when bearing 5 internal rotation, can take out the oil in first oil groove 54, form the oil film, further alleviate the wearing and tearing between bearing 5 and the pivot 4.
In some possible designs, the cross section of the first oil groove 54 is circular arc shape along the radial direction of the shaft hole, and the center of the first oil groove 54 is located in the shaft hole.
In this design, in the cross-section of the radial direction in axle hole, the cross-section of first oil groove 54 is arc, and the centre of a circle of first oil groove 54 sets up in the axle hole, like this, when pivot 4 is rotatory in the axle hole, pivot 4 drives the interior oil flow of first oil groove 54, make the interior oil of first oil groove 54 take place along the flow of axle hole circumference, form hydraulic pressure bearing area, realize the oil film bearing capacity, and then realize bearing to pivot 4, increase the good lubrication between pivot 4 and the bearing 5, improve the wearing and tearing condition of pivot 4.
It can be understood that, because the cross section of the first oil groove 54 is circular arc, in the process of rotating the rotating shaft 4, the oil in the first oil groove 54 can flow from deep to shallow, so that a high pressure is formed in a pressure area, and further, the oil film bearing capacity is realized, and the supporting of the rotating shaft 4 is realized.
As shown in fig. 4 and 5, in some possible designs, a third oil groove 15 is further provided on the housing 1, and the first pressure chamber is communicated with the third pressure chamber through the third oil groove 15.
In this design, still be provided with third oil groove 15 on the casing 1, third oil groove 15 communicates first pressure chamber and third pressure chamber, consequently, under the effect of pressure difference, fluid in the first pressure chamber is extruded into the third pressure chamber through third oil groove 15, then flows to first cavity 120 through first oil groove 54, flows to second cavity 122 through clearance 20 again, then flows to the second pressure chamber through clearance 20 and first cavity 120, takes away the most heat of motor portion 2, improves the radiating effect of motor portion 2.
Specifically, the third pressure chamber is a medium pressure chamber, and the third oil groove 15 is a throttle groove.
It can be understood that, the pump device includes first oil circuit and second oil circuit, first oil circuit is including the inlet port 10 that communicates in proper order, the second pressure chamber, first pressure chamber and oil outlet 11, behind the operation of pump portion 3, form first pressure chamber and second pressure chamber, the pressure of second pressure chamber is lower, consequently outside fluid flows to the second pressure chamber by inlet port 10, then extrudees into first pressure chamber, and then flow out by oil outlet 11, that is, fluid flows to the second pressure chamber by inlet port 10, then flow to first pressure chamber and then flow out oil outlet 11, realize the flow of first oil circuit. The second oil path includes a first pressure chamber, a throttling groove, a third pressure chamber, a straight oil groove, a first cavity 120, a gap 20, a second cavity 122, a gap 20, a first cavity 120, an oil return groove and a second pressure chamber which are sequentially communicated, wherein the pressures of the first pressure chamber, the third pressure chamber, the first cavity 120 and the second pressure chamber are gradually reduced, therefore, under the action of pressure difference, oil sequentially flows through the throttling groove, the third pressure chamber, the straight oil groove, the first cavity 120, the gap 20, the second cavity 122, the gap 20, the first cavity 120, the oil return groove and the second pressure chamber from the first pressure chamber, and the circulation of the second oil path is realized, namely, in the embodiment provided by the application, the first oil path and the second oil path are provided, the pumping of the oil by a pump device is realized by the first oil path, and the heat dissipation of the motor part 2 is realized by the second oil path.
As shown in fig. 4 and 5, according to a third embodiment of the present invention, on the basis of the third embodiment, further: a first groove 130 and a second groove 132 are arranged on the inner wall surface of the pump chamber 13, the first groove 130 and the pump part 3 enclose a first pressure chamber, and the second groove 132 and the pump part 3 enclose a second pressure chamber; the first groove 130 communicates with the third oil groove 15, and the second groove 132 communicates with the second oil groove 14.
In this design, the inner wall surface of the pump chamber 13 is provided with a first groove 130 and a second groove 132, the first groove 130 and the pump portion 3 enclosing a first pressure chamber, and the second groove 132 and the pump portion 3 enclosing a second pressure chamber. The pressure in the first pressure chamber is balanced by the provision of the first recess 130 and the pressure in the second pressure chamber is balanced by the provision of the second recess 132. Wherein, first recess 130 and third oil groove 15 intercommunication for first pressure chamber and third pressure chamber intercommunication, and then realize the flow of fluid. The second groove 132 is communicated with the second oil groove 14, so that the first cavity 120 is communicated with the second pressure cavity, and further, the oil in the first cavity 120 can flow into the second pressure cavity, most of heat of the motor part 2 is taken away, and the heat dissipation effect of the motor part 2 is improved.
The pump section 3 is a gear pump including an internal gear and an external gear that mesh with each other. During the meshing transmission of the internal gear and the external gear, a plurality of high pressure areas and a plurality of low pressure cavity areas are formed, and the first grooves 130 communicate the high pressure areas together to form a first pressure cavity, namely a high pressure cavity, so that the pressure in the high pressure areas is more balanced. The second groove 132 connects the low pressure areas to form a second pressure chamber, i.e., a low pressure chamber, so that the pressures in the low pressure areas are more balanced, and the abrupt increase or decrease of the pressures in the high pressure chamber and the low pressure chamber is avoided, thereby reducing the noise generated during the operation of the pump device.
Further, the gear pump includes a first gear and a second gear, the first gear is an internal gear, and the second gear is an external gear. First gear and 4 fixed connection of pivot, the second gear setting is in the first gear outside, and like this, when motor part 2 moves, drive pivot 4 and rotate, and pivot 4 drives the first gear rotation of fixing on it, and first gear and second gear meshing realize the operation of pump portion 3.
Further, the first gear is in interference fit with the rotating shaft 4.
As shown in fig. 1, according to a fifth embodiment of the present invention, on the basis of the fourth embodiment, further: the bearing 5 includes: a bearing body 50; the extending section 52 is disposed at least one end of the bearing body 50 along the axial direction of the bearing 5, the bearing body 50 and the extending section 52 are provided with shaft holes, and the first oil groove 54 penetrates through the bearing body 50 and the extending section 52 along the axial direction of the rotating shaft 4.
In this design, bearing 5 includes bearing body 50 and extension 52, is provided with the shaft hole on extension 52 and the bearing body 50, like this, when bearing 5 is connected with pivot 4, pivot 4 wears to establish in the shaft hole for extension 52 can contact with pivot 4, and then can avoid bearing 5 department stress concentration problem, reduces bearing 5's wearing and tearing simultaneously, promotes bearing 5 life.
It should be noted that, the extension 52 has flexibility, so that the extension 52 can deform under the external force, thereby eliminating the problem of stress concentration.
It can be understood that the extension section 52 provided on the bearing 5 realizes a flexible design of the bearing 5, and the rotating shaft 4 is matched with the bearing 5 to realize the rotating connection of the rotating shaft 4 and the bearing 5. When the rotating shaft 4 does not drive the load to rotate, the gaps 20 are formed between the rotating shaft 4 and the bearings 5, when the rotating shaft 4 drives the load to rotate, the rotating shaft 4 can move along the radial direction to cause the gaps 20 between the rotating shaft 4 and the bearings 5 to change, the pressure of the axial end parts of the bearings 5 is larger at the moment, when the rotating shaft 4 carries out radial unbalance loading, the rotating shaft 4 can transmit the radial unbalance loading force to the extension section 52, and the extension section 52 can deform under the action of the radial unbalance loading force, so that the radial unbalance loading force is effectively buffered, the problem of local stress concentration on the bearings 5 is avoided, the abrasion of the bearings 5 is reduced, the rotating shaft 4 is in flexible contact with the bearings 5, the contact area between the rotating shaft 4 and the bearings 5 is increased, the surface pressure is reduced, the abrasion rate of the bearings 5 is reduced, and the damage rate of the bearings 5 is effectively reduced.
In a specific application, the bearing body 50 and the extension 52 are integrally designed, and the bearing body 50 and the extension 52 are integrally manufactured.
In some possible designs, the wall thickness of the extension 52 is greater than or equal to 0.5mm and less than or equal to 3mm.
In this design, the too thin wall thickness of extension 52 then can reduce the intensity of bearing 5 to the supporting role to pivot 4, the too thick wall thickness of extension 52 then can reduce the flexibility of extension 52, and then reduces the buffering to radial unbalance loading power, simultaneously, the unreasonable problem that then can not effectual avoid stress concentration of wall thickness design of extension 52, the serious problem of solution bearing 5 wearing and tearing that also can not be better. Therefore, the thickness of the extension section 52 is set to be greater than or equal to 0.5mm and less than or equal to 3mm, so that the strength of the extension section 52 can be ensured, the buffer of the extension section 52 on the radial unbalance loading force can be ensured, the problem of stress concentration is solved well, the abrasion of the bearing 5 is reduced, and the service life of the bearing 5 is prolonged.
It will be appreciated that the extension 52 is a thin-walled structure.
In some possible designs, the ratio of the height of the extension 52 to the height of the bearing 5 in the axial direction of the shaft hole is greater than or equal to 2% and less than or equal to 50%.
In this design, the height of the extension 52 is too high, which affects the strength of the whole bearing 5, and further reduces the supporting strength for the rotating shaft 4, increases the shaking of the rotating shaft 4 during the operation of the pump device, and increases the noise during the operation of the pump device. Too low a height of the extension 52 will affect the effect of the extension 52 on the radial offset force, and the installation of the height of the extension 52 will affect the stress concentration problem of the bearing 5 and the wear problem of the bearing 5. Therefore, the height of the extension section 52 is set to be between 2% and 50% of the total height of the bearing 5, so that the supporting effect on the rotating shaft 4 can be improved, the buffer on radial unbalance loading force can be guaranteed, the problem of stress concentration of the bearing 5 can be avoided, the abrasion of the bearing 5 is reduced, and the service life of the bearing 5 is prolonged.
The height of the extension 52 is the height along the axial direction of the shaft hole, and the height of the bearing 5 is the height along the axial direction of the shaft hole.
As shown in fig. 7 to 9, according to a sixth embodiment of the present invention, on the basis of the fifth embodiment, further: the rotating shaft 4 comprises a stepped shaft, and the stepped shaft comprises a first shaft section 41, a second shaft section 42 and a third shaft section 43 which are connected in sequence; the first shaft section 41 is connected to the pump section 3, the second shaft section 42 is connected to the bearing 5, and the third shaft section 43 is connected to the motor section 2.
In this design, pivot 4 includes the step shaft, and the step shaft includes first shaft segment 41, second shaft segment 42 and the third shaft segment 43 that connects gradually, and wherein, pump portion 3 sets up on first shaft segment 41, and bearing 5 sets up on second shaft segment 42, and motor portion 2 sets up on third shaft segment 43 for pump portion 3, bearing 5 and motor portion 2 cooperate with pivot 4 respectively along the axis direction of pivot 4, have guaranteed pump portion 3, and motor portion 2 steady operation. Meanwhile, the stepped shaft has the effect of assembly limiting, and the design and the use of an assembly tool can be reduced.
As shown in fig. 8 and 9, in some possible designs, a first shoulder 44 is provided between the first shaft section 41 and the second shaft section 42, and a second shoulder 45 is provided between the second shaft section 42 and the third shaft section 43; the first shoulder 44 is provided with a first relief groove 46, and the second shoulder 45 is provided with a second relief groove 47.
In this design, form first shoulder 44 between first shaft section 41 and the second shaft section 42, be formed with second shoulder 45 between second shaft section 42 and the third circle section, through the setting of first shoulder 44, can be effectively spacing to the position of pump portion 3 on pivot 4, the setting of second shoulder 45 can be effectively spacing to motor portion 2 assembly, is favorable to reducing the use of spacing frock. Wherein, be provided with first tool escape 46 on the first shaft shoulder 44, be provided with second tool escape 47 on the second shaft shoulder 45, the intensity of first shaft shoulder 44 department is favorable to improving to being provided with of first tool escape 46, and the intensity of second shaft shoulder 45 department is favorable to improving to being provided with of second tool escape 47, and then is favorable to increasing the intensity of pivot 4.
As shown in fig. 1, according to a seventh embodiment of the present invention, on the basis of any one of the above embodiments, further: the motor section 2 includes: a rotor 22, the rotor 22 is connected with the rotating shaft 4 and is positioned on the peripheral side of the rotating shaft 4; and a stator 24, wherein the stator 24 is positioned outside the rotor 22 and is rotationally connected with the rotor 22, and a gap 20 is formed between the rotor 22 and the stator 24.
In this design, the motor part 2 includes a stator 24 and a rotor 22, the rotor 22 is connected to the rotating shaft 4, and the stator 24 is located outside the rotor 22 and is rotatably connected to the rotor 22. After the power is switched on, the rotor 22 drives the rotating shaft 4 to rotate under the action of the magnetic field, so that the pump device is driven.
Wherein, have clearance 20 between rotor 22 and the stator 24, on the one hand, clearance 20 has guaranteed that rotor 22 can rotate, avoids taking place to interfere between rotor 22 and the stator 24, and on the other hand, clearance 20's setting provides the passageway for the flow of second oil circuit for first cavity 120 and second cavity 122 intercommunication, and then take away the heat of motor portion 2 through the flow of fluid, accelerate the heat dissipation of motor portion 2.
In a particular application, the stator 24 also has windings thereon.
Further, the rotor 22 is fixed to the rotary shaft 4.
In some possible designs, the housing 1 further includes an electric control cavity 16, the electric control cavity 16 is located on a side of the motor cavity 12 away from the pump cavity 13, and the motor cavity 12 is communicated with the electric control cavity 16; the pump device also comprises an electric control part 6, the electric control part 6 is arranged in the electric control cavity 16, and the electric control part 6 is electrically connected with the motor part 2.
In this design, casing 1 still includes automatically controlled chamber 16, along the axis of rotation direction of motor portion 2, automatically controlled chamber 16 is located motor chamber 12 and keeps away from one side of pump chamber 13, automatically controlled portion 6 sets up in automatically controlled chamber 16, automatically controlled portion 6 is connected with motor portion 2, and then realize the control to the operation of motor portion 2, wherein, motor chamber 12 is linked together with automatically controlled chamber 16 for the heat in automatically controlled chamber 16 can be taken away to the fluid in motor chamber 12, and then realize the heat dissipation of automatically controlled portion 6.
Further, the electric control portion 6 is connected to the motor portion 2 through a first plug-in.
In a specific application, the number of first pins is 3.
In some possible designs, the first pin is fixedly connected with the electric control part 6 by welding.
In this design, first contact pin and automatically controlled portion 6 pass through welded fastening to be connected, have improved the joint strength between first contact pin and the automatically controlled portion 6.
In a specific application, the first pin is soldered to the electronic control unit 6.
In another possible design, the first pin is detachably connected to the electric control unit 6, and further, the first pin is connected to the electric control unit 6 by plugging.
In some possible designs, the electric control part 6 is covered in a sealant, and the sealant is used for separating the electric control part 6 from oil in the motor cavity 12.
In this design, automatically controlled portion 6 is sealed with motor chamber 12 through sealed glue for automatically controlled portion 6 is completely isolated with the fluid in the motor chamber 12, avoids fluid to damage automatically controlled portion 6, guarantees the reliability of automatically controlled portion 6. In addition, the sealant can bond the electric control part 6 and the electric control cavity 16 together while playing a role in sealing, namely, the electric control part 6 and the electric control cavity 16 are connected, so that other parts are not needed to fix the electric control part 6, the use of parts is reduced, the installation is simplified, and the production cost is reduced.
Specifically, the electric control portion 6 is completely buried in the sealant.
As shown in fig. 1, in some possible designs, the housing 1 comprises: a casing 17, wherein the casing 17 comprises a motor cavity 12, a pump cavity 13 and an electric control cavity 16 of the shell 1; the first cover body 18 covers the pump cavity 13, and the first cover body 18 is provided with an oil inlet hole 10 and an oil outlet hole 11; and a second cover body 19 covering the electric control cavity 16.
In this design, the housing 1 includes a case 17, a first cover 18, and a second cover 19. A motor cavity 12, a pump cavity 13 and an electric control cavity 16 are formed in the machine shell 17, the motor part 2 is arranged in the electric control cavity 16, the pump part 3 is arranged in the pump cavity 13, and the electric control part 6 is arranged in the electric control cavity 16. The two ends of the casing 17 are respectively covered by a first cover 18 and a second cover 19, and the motor part 2, the pump part 3 and the electric control part 6 are limited in the casing 17. Wherein, the first cover 18 is provided with an oil inlet 10 and an oil outlet 11, and oil enters the pump chamber 13 through the oil inlet 10 and then flows out of the pump chamber 13 through the oil outlet 11.
Furthermore, a sinking groove is formed in the first end of the casing 17, and at least one part of the electric control part 6 is arranged in the sinking groove, so that the whole length of the pump device can be reduced while the electric control part 6 is installed, and the pump device is miniaturized. Wherein, electrically controlled portion 6 is sealed between sealed glue and casing 17 for electrically controlled portion 6 can be fixed in the heavy inslot of casing 17, has still guaranteed the sealed of junction between electrically controlled portion 6 and the casing 17, avoids the machine oil in the pump unit to get into and causes the damage of electrically controlled portion 6 in electrically controlled portion 6.
Further, the first cover body 18 includes a cover body, and a first pressure stabilizing groove and a second pressure stabilizing groove which are arranged on the cover body, the first pressure stabilizing groove and the second pressure stabilizing groove are both arc-shaped and are arranged on the first end surface of the cover body, the first pressure stabilizing groove is provided with a first wall surface and a second wall surface along the circumferential direction of the cover body, the second pressure stabilizing groove is provided with a third wall surface and a fourth wall surface, the first wall surface and the second wall surface are oppositely arranged along the circumferential direction of the cover body, and the third wall surface and the fourth wall surface are oppositely arranged along the circumferential direction of the cover body. Therefore, the first pressure stabilizing groove and the second pressure stabilizing groove are formed in the pump cover, so that the condition that the pressure in the pump cavity 13 is increased or decreased steeply can be reduced, oil pressure pulsation of an oil inlet and an oil outlet of the pump device is reduced, and noise is improved. The first wall face and the third wall face are arranged correspondingly, the second wall face and the fourth wall face are arranged correspondingly, a first included angle is formed between the first wall face and the third wall face, and a second included angle is formed between the second wall face and the fourth wall face, so that the first pressure stabilizing groove and the second pressure stabilizing groove have a better pressure balancing effect, the condition that the pressure in the pump device is increased steeply or decreased steeply is further reduced, and the noise generated during the operation of the pump device can be better improved.
It should be noted that the pump chamber 13 has a first pressure chamber and a second pressure chamber, wherein the pressure received by the second pressure chamber is lower than the pressure received by the first pressure chamber, so as to realize the pumping of the oil. Specifically, the second pressure cavity is a low-pressure cavity, the first pressure cavity is a high-pressure cavity, the first pressure stabilizing groove forms a part of the second pressure cavity, and the second pressure stabilizing groove forms a part of the first pressure cavity, that is, the second pressure stabilizing groove, the pump portion 3 and the first groove 130 form the first pressure cavity, and the first pressure stabilizing groove, the pump portion 3 and the second groove 132 form the second pressure cavity, so that the first pressure stabilizing groove and the second groove 132 can balance the pressure in the second pressure cavity, so that the pressures in all places in the second pressure cavity are balanced, the second pressure stabilizing groove and the first groove 130 can balance the pressure in the first pressure cavity, so that the pressures in all places in the first pressure cavity are balanced, thereby preventing the pressures in the second pressure cavity and the first pressure cavity from increasing steeply or dropping steeply, and further preventing the pump device from generating noise.
In a particular application, the first end of the first cover 18 is disposed facing the interior of the housing 17.
In some possible designs, the first included angle is greater than or equal to 26 °, and less than or equal to 32 °; the second included angle is greater than or equal to 46 ° and less than or equal to 54 °.
In this design, the setting of first contained angle and second contained angle, the balanced effect of first recess 130 and second recess 132 to the pressure in pump chamber 13 is being influenced, first contained angle and second contained angle undersize and when too big, can reduce the balanced effect of first recess 130 and second recess 132 to the pressure in pump chamber 13, consequently, set the value of first contained angle between 26 to 32, the value of second contained angle sets up between 46 to 54, can guarantee the balanced effect of first recess 130 and second recess 132 to the pressure in pump chamber 13, and then avoid the pressure in pump chamber 13 to increase steeply or descend steeply, reduce the noise of pump unit operation.
Furthermore, a heat dissipation portion is disposed on the second cover 19, and the heat dissipation portion is located on a side of the second cover 19 away from the electronic control portion 6.
In this design, the second cover 19 is further provided with a heat dissipation portion, so that the heat dissipation effect of the electric control portion 6 is improved through the arrangement of the heat dissipation portion, and the performance of the electric control portion 6 is ensured. The heat dissipation part is arranged on one side of the second cover 19 departing from the electric control part 6, namely the heat dissipation part is arranged outside the casing 17, so that heat in the electric control part 6 and the casing 17 can be dissipated to the outside through the heat dissipation part, and the heat dissipation performance of the pump device is improved.
As shown in fig. 1 and 5, in some possible designs, a flange 170 is provided on an outer side wall of the casing 17, and a sealing groove 172 and a connecting hole 174 are provided on the flange 170.
In this design, a flange 170 is provided on the outer side wall of the casing 17, and the pump unit can be mounted through the flange 170. Wherein, the flange 170 is provided with a sealing groove 172, and a sealing member can be installed in the sealing groove 172 or a sealant can be contained therein. The flange 170 is coupled to other structures through the coupling holes 174.
In some possible designs, as shown in fig. 6, the housing 17 is provided with lightening slots 176.
In this design, the housing 17 is provided with a lightening groove 176 to reduce the overall weight of the pump device, reduce the amount of material used, and reduce the production cost.
In some possible designs, a plug-in slot 178 is also provided on the housing 17, the plug-in slot 178 being used to receive a connector.
In this design, a plug-in slot 178 is provided on the housing 17, and a connector is placed in the plug-in slot 178 to electrically connect the connector with the electric control unit 6.
Wherein the connector is connected with the electric control part 6 through a second plug-in unit.
In a specific application, the number of second pins is 4.
In some possible designs, the second pin is fixedly connected with the electric control part 6 by welding.
In this design, the second contact pin passes through welded mode and automatically controlled portion 6 fixed connection, has improved the joint strength of second contact pin and automatically controlled portion 6.
In a specific application, the second pin is soldered to the electronic control unit 6 by soldering.
In another possible design, the second pin is detachably connected to the electric control unit 6, and further, the second pin is connected to the electric control unit 6 by plugging.
In some possible designs, the insert groove 178 is provided with a glue injection hole 179, and the glue injection hole 179 is communicated with the electric control cavity 16.
In the design, the plug-in groove 178 is provided with the glue injection hole 179, so that glue can be injected into the electric control cavity 16 through the glue injection hole 179, and the electric control part 6 and the electric control cavity 16 are sealed.
According to the utility model discloses an eighth embodiment, still provide a vehicle, include: a pump device as claimed in any one of the above embodiments.
The utility model discloses the vehicle that the second aspect provided, because of the pump unit who provides including any above-mentioned embodiment, consequently have all beneficial effects of pump unit.
It is worth to say that the vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, a range-extended electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.
Specifically, the pump device is an electronic oil pump.
When the electronic oil pump is operated, the electronic oil pump is filled with engine oil, and the motor part 2 of the electronic oil pump is immersed in the engine oil. The motor part 2 divides the inner cavity of the electronic oil pump into a first cavity 120 and a second cavity 122, wherein the second cavity 122 is close to the electric control board of the electronic oil pump, the first cavity 120 and the second cavity 122 are filled with engine oil, the first cavity 120 and the second cavity 122 are connected through a gap 20 of the motor part 2, and the gap 20 of the motor part 2 is filled with engine oil. The engine oil in the motor unit 2 is circulated inside the electronic oil pump through the sliding bearing 5 and the oil groove of the electronic oil pump.
Further, there are two ways for the engine oil in the electronic oil pump to move, and the first oil path is: the oil inlet hole 10, the second pressure cavity, the first pressure cavity and the oil outlet hole 11; the second oil path is: first pressure chamber-throttling groove-third pressure chamber-straight oil groove-first chamber 120-gap 20-second pressure chamber-gap 20-first chamber 120-oil return groove-second pressure chamber-first pressure chamber.
Further, the electronic oil pump is composed of a housing 1, a pump portion 3, a motor portion 2, and an electric control portion 6.
The housing 1 includes: a first cover 18 with an oil inlet and outlet 11, a second cover 19, an insert and a casing 17.
The housing 17 comprises a plurality of chambers: pump chamber 13, motor chamber 12, automatically controlled chamber 16, bearing 5 chamber, pump chamber 13 can be used for holding pump portion 3, motor chamber 12 can be used for holding motor portion 2, and automatically controlled chamber 16 can be used for holding automatically controlled portion 6.
The pump section 3 includes: the internal gear, the external gear and the pump chamber 13 are formed integrally with the housing 17, and the internal gear, the external gear and the pump chamber 13 form a first pressure chamber and a second pressure chamber, wherein the first groove 130 of the housing 17 constitutes a part of the first pressure chamber and the second groove 132 of the housing 17 constitutes a part of the second pressure chamber.
The motor section 2 includes: stator 24, rotor 22 and rotating shaft 4, rotor 22 is closely connected to rotating shaft 4.
The electric control section 6 includes: automatically controlled board, glue, 24pin needles of stator, plug-in components pin needle etc. automatically controlled board is separated by glue with filling between oily motor portion 2, and glue is completely isolated automatically controlled board and machine oil.
The engine oil of the motor part 2 and the pump part 3 is communicated with a flow passage such as a throttling groove through a straight oil groove in a sliding bearing 5 on a machine shell 17 and an oil return groove on the machine shell 17.
Wherein, be provided with first recess 130 on the inside wall of pump chamber 13, second recess 132, throttle groove, antifriction groove 134, return oil groove, straight oil groove, wherein, first recess 130 is used for holding high-pressure fluid, and second recess 132 is used for holding low-pressure fluid, and first recess 130 and second recess 132 are provided with the chamfer, and the straight oil groove on first recess 130 of straight oil groove intercommunication and the slide bearing 5, the fluid accessible throttle groove flow direction slide bearing 5 in the first recess 130, play the lubrication action to slide bearing 5. An oil return groove is arranged in the second groove 132, and the oil return groove is a through hole and used for communicating the pump cavity 13 with the motor cavity 12. Wherein, the sliding bearing 5 is provided with a straight oil groove near the first groove 130, which can play a role of lubrication and antifriction.
The lubricating oil path of the shell 17 is as follows: first recess 130-throttling groove-straight oil groove-motor cavity 12-return oil groove-second oil groove 14.
The two ends or one end of the sliding bearing 5 are provided with extension sections 52 with one extending end, each extension section 52 is of a thin-wall structure, the inner diameter of each thin-wall structure is consistent with the aperture of the bearing 5, the thickness of each thin-wall structure is 0.5mm-4mm, and the height of each thin-wall structure accounts for 2% -50% of the total height of the bearing 5, so that the flexible design of the bearing 5 is realized, the stress concentration problem is reduced, and the abrasion of the bearing 5 is reduced.
The casing 17 is provided with a flange 170 structure, the flange 170 is provided with a connecting hole 174 and an annular sealing groove 172, the sealing groove 172 can be used for placing a sealing ring or containing sealant, and the flange 170 structure can be directly connected with the main drive through the connecting hole 174.
The housing 17 is provided with a plug-in groove 178, a glue injection hole 179 is partially formed in the plug-in groove 178, the plug-in groove 178 can be used for inserting a connector of a pump body, and the glue injection hole 179 can be used for pouring glue.
The housing 17 is provided with a clearance groove for reducing the material consumption.
The motor cavity 12 is provided with an electric control board fixing sink groove for fixing the electric control board.
Further, the rotating shaft 4 is a stepped shaft; the first shaft section 41 of the rotating shaft 4 is a gear rotor 22 section and is matched with an internal gear, the second shaft section 42 of the rotating shaft 4 is a bearing 5 section and is matched with the bearing 5 of the shell 1, and the third shaft section 43 of the rotating shaft 4 is a motor section and is matched with the rotor 22 of the motor part 2; the first shaft section 41 and the second shaft section 42 of the rotating shaft 4 form a first shaft shoulder 44 for assembling and limiting the gear rotor 22, and the second shaft section 42 and the third shaft section 43 of the rotating shaft 4 form a second shaft shoulder 45 for assembling and limiting the rotor 22 of the motor part 2, so that the use of a limiting tool is reduced; the first shaft shoulder 44 is provided with a first relief groove 46, and the second shaft shoulder 45 is provided with a second relief groove 47, so that the strength of the shaft shoulder is improved.
In the present application, the term "plurality" means two or more unless expressly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, detachable connections, or integral connections; "coupled" may be direct or indirect through an intermediary. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (15)
1. A pump apparatus, comprising:
the oil pump comprises a shell, wherein an oil inlet and an oil outlet are formed in the shell, the shell comprises a motor cavity and a pump cavity, and the pump cavity is communicated with the oil inlet and the oil outlet;
the motor part is arranged in the motor cavity, a gap is formed in the motor part, the motor part divides the motor cavity into a first cavity and a second cavity, the first cavity is communicated with the second cavity through the gap, and the first cavity is communicated with the pump cavity;
the pump part is arranged in the pump cavity and is connected with the motor part;
the pump part and the shell enclose a first pressure cavity and a second pressure cavity, and the pressure borne by the first pressure cavity, the first cavity and the second pressure cavity is reduced in sequence;
the oil inlet hole, the second pressure cavity, the first pressure cavity and the oil outlet hole are sequentially communicated to form a first oil path, and the first pressure cavity, the first cavity, the gap, the second cavity, the gap, the first cavity, the second pressure cavity and the first pressure cavity are sequentially communicated to form a second oil path.
2. The pump apparatus of claim 1, further comprising:
the rotating shaft is arranged in the shell, and the motor part and the pump part are connected with the rotating shaft;
the bearing is connected with the shell, the rotating shaft is arranged in a shaft hole of the bearing, a third pressure cavity is formed among the bearing, the rotating shaft and the pump part and is communicated with the first pressure cavity,
a first oil groove is formed in the bearing, a second oil groove is formed in the shell, the first oil groove is communicated with the third pressure cavity and the first cavity, and the second oil groove is communicated with the first cavity and the second pressure cavity;
the pressure born by the first pressure cavity, the third pressure cavity, the first cavity and the second pressure cavity is decreased progressively in sequence.
3. Pump apparatus according to claim 2,
still be equipped with the third oil groove on the casing, first pressure chamber passes through the third oil groove with the third pressure chamber intercommunication.
4. Pump apparatus according to claim 3,
a first groove and a second groove are formed in the inner wall surface of the pump cavity, the first groove and the pump part enclose the first pressure cavity, and the second groove and the pump part enclose the second pressure cavity;
the first groove is communicated with the third oil groove, and the second groove is communicated with the second oil groove.
5. The pump arrangement of claim 4, wherein the bearing comprises:
a bearing body;
the extension section is followed the axial of bearing, the extension section is located the at least one end of bearing body, the bearing body with be equipped with on the extension section the shaft hole, first oil groove is followed the axis direction of pivot runs through the bearing body with the extension section.
6. Pump apparatus according to claim 5,
the rotating shaft comprises a stepped shaft, and the stepped shaft comprises a first shaft section, a second shaft section and a third shaft section which are sequentially connected;
the first shaft section is connected with the pump portion, the second shaft section is connected with the bearing, and the third shaft section is connected with the motor portion.
7. The pump arrangement according to claim 6,
a first shaft shoulder is arranged between the first shaft section and the second shaft section, and a second shaft shoulder is arranged between the second shaft section and the third shaft section;
the first shaft shoulder is provided with a first tool withdrawal groove, and the second shaft shoulder is provided with a second tool withdrawal groove.
8. The pump apparatus according to claim 4, wherein the motor portion comprises:
the rotor is connected with the rotating shaft and is positioned on the peripheral side of the rotating shaft;
the stator is positioned outside the rotor and is in rotary connection with the rotor, and the gap is formed between the rotor and the stator.
9. Pump arrangement according to any one of claims 1 to 8,
the shell further comprises an electric control cavity, the electric control cavity is located on one side, away from the pump cavity, of the motor cavity, and the motor cavity is communicated with the electric control cavity;
the pump device further comprises an electric control part, the electric control part is arranged in the electric control cavity, and the electric control part is electrically connected with the motor part.
10. Pump apparatus according to claim 9,
the electric control part is coated in a sealant, and the sealant is used for separating oil in the electric control part and the motor cavity.
11. The pump arrangement according to any one of claims 1 to 8, wherein the housing comprises:
a housing including the motor cavity, the pump cavity, and an electrical control cavity of the housing;
the first cover body is covered on the pump cavity, and the oil inlet hole and the oil outlet hole are formed in the first cover body;
and the second cover body is covered on the electric control cavity.
12. Pump apparatus according to claim 11,
a flange is arranged on the outer side wall of the shell, and a sealing groove and a connecting hole are formed in the flange; and/or
And a weight reduction groove is formed in the shell.
13. The pump arrangement according to claim 12,
the shell is also provided with an insert groove used for accommodating the connector.
14. The pump arrangement according to claim 13,
and the plug-in groove is provided with a glue injection hole, and the glue injection hole is communicated with the electric control cavity.
15. A vehicle, characterized by comprising:
a pump device according to any one of claims 1 to 14.
Priority Applications (1)
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CN202220790365.9U CN217602913U (en) | 2022-04-07 | 2022-04-07 | Pump device and vehicle |
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CN202220790365.9U CN217602913U (en) | 2022-04-07 | 2022-04-07 | Pump device and vehicle |
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CN217602913U true CN217602913U (en) | 2022-10-18 |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118998043A (en) * | 2024-10-25 | 2024-11-22 | 杭州安衡迅科技有限公司 | Hydraulic drive device |
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- 2022-04-07 CN CN202220790365.9U patent/CN217602913U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118998043A (en) * | 2024-10-25 | 2024-11-22 | 杭州安衡迅科技有限公司 | Hydraulic drive device |
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