CN106640679B - Electric engine water pump and vehicle with it - Google Patents

Abstract

An engine electric water pump and a vehicle with it, including a water pump bracket and a water pump body, the water pump body includes a water pump housing, a water pump end cover, a drive assembly, a stator, a fixed shaft, a rotor and an impeller, and the water pump housing and the water pump end cover are in common A control room is formed. The side of the pump end cover away from the pump housing is provided with a rotor chamber. The side of the water pump end cover away from the water pump housing forms a spiral chamber together with the pump bracket. The concave part communicates with the spiral chamber, but not with the control room. The spiral chamber communicates with the inside of the water pump bracket through the coolant inlet and coolant outlet. The fixed shaft is fixed in the rotor chamber and the spiral chamber. The rotor is set in the rotor chamber, and the impeller is set in the spiral chamber. The stator is sleeved on the fixed shaft, and the stator is sleeved on the outer wall of the rotor chamber. The electric water pump of the engine can realize the regulation of the flow rate of the coolant under all working conditions of the engine, and can improve the efficiency of the electric water pump.

Description

Engine electric water pump and vehicle having same

technical field

The invention relates to the technical field of vehicle parts, in particular to an engine electric water pump and a vehicle with the engine electric water pump.

Background technique

The water pump is an indispensable component in the engine cooling system. It mainly provides kinetic energy for the coolant to make the coolant flow in the engine cooling system, so that the coolant can take away the heat generated in the engine system in time.

In the prior art, traditional vehicles basically use mechanical water pumps. The mechanical water pumps are driven by an accessory gear train on the engine. The water pump is directly proportional to the rotational speed of the engine, but has nothing to do with the load of the engine. Since the performance of the water pump is based on ensuring that the engine does not overheat, it is usually necessary to linearize the performance based on the highest temperature point of the vehicle or the highest power point of the engine. When the engine is under low load, the flow rate is often too high and the water temperature is too low. .

The clutch type water pump is a deformation of a mechanical water pump, which generally includes a water pump body, an impeller, a control component and a clutch. The control component controls the clutch through a given signal to make the water pump and the engine contact or disengage each other. When the contact between the water pump and the engine is out of contact, the water pump does not work; when the water pump is in contact with the engine, the water pump can work. The clutch-type water pump can make the flow of coolant in the cooling system zero through the non-working state of the water pump, so as to achieve the purpose of rapid warm-up of the whole vehicle. But the clutch type water pump also can only realize the opening and stopping of water pump, and the rotating speed of water pump during work is still directly proportional to engine, can not freely regulate flow.

In order to be able to adjust the flow in the cooling system within the full range of working conditions, more and more independent electric water pumps are used in engines. Electric water pumps generally include rotor assemblies, stator assemblies, control board components, connectors and Cover, etc., but the electric water pump itself only retains the water inlet and outlet, without a matching water pump bracket, and without an open volute. The impeller of the independent electric water pump is built-in, and the independent electric water pump is closed as a whole. It is necessary to introduce part of the coolant into the motor for heat dissipation. The coolant is introduced into the motor. When the power of the electric water pump is constant, the pump output will be reduced. Coolant flow.

Contents of the invention

The purpose of the present invention is to provide an engine electric water pump and a vehicle having the same. The engine electric water pump can realize the adjustment of the coolant flow rate under all engine working conditions, and can improve the efficiency of the electric water pump.

An embodiment of the present invention provides an electric water pump for an engine, which includes a water pump bracket and a water pump body. The water pump body is fixed on the water pump bracket and connected to a cooling system through the water pump bracket. The water pump body includes a water pump housing, Water pump end cover, drive assembly, stator, fixed shaft, rotor and impeller, the water pump casing is fixed on the water pump end cover, and forms a control room together with the water pump end cover, and the water pump end cover is far away from the One side of the water pump casing is provided with a rotor chamber, and the side of the water pump end cover away from the water pump casing is fixed on the water pump support, and forms a spiral chamber together with the water pump support, and the rotor chamber communicates with the spiral chamber , but not communicated with the control chamber, the spiral chamber communicates with the inside of the water pump bracket through the coolant inlet and coolant outlet, the fixed shaft is fixed in the rotor chamber and the spiral chamber, and the rotor is set In the rotor chamber, the impeller is arranged in the spiral chamber, the impeller is fixed on the rotor and sleeved on the fixed shaft so as to be rotatable around the fixed shaft, the drive assembly and the The stator is connected and located in the control chamber, and the stator is sheathed on the outer wall of the rotor chamber.

Further, a first spiral casing is formed on the surface of the water pump end cover away from the water pump casing, and a second spiral casing is formed on the water pump support at a position corresponding to the first spiral casing, so The side of the water pump end cover away from the water pump casing is fixed on the water pump bracket, the spiral chamber is jointly formed by the first spiral casing and the second spiral casing, and the water pump bracket is integrated There are engine water inlet and outlet, engine inlet and outlet water outlet, expansion tank interface and heater water tank interface.

Further, the bottom of the second spiral housing is provided with a first shaft seat, the bottom of the rotor chamber is provided with a second shaft seat, and the fixed shaft is fixed on the first shaft seat and the second shaft between seats.

Further, the cooling liquid inlet is arranged at the bottom of the first shaft seat, and in the spiral chamber, a spiral flow channel is formed from the first shaft seat to a direction away from the first shaft seat. The liquid outlet is arranged at the end of the spiral channel in a direction away from the first shaft seat.

Further, the impeller includes an upper impeller and a lower impeller, the upper impeller is sleeved on the lower impeller, the rotor is connected to the lower impeller, a through hole is provided on the lower impeller, and the cooling liquid passes through The through hole communicates between the front and rear sides of the impeller.

Further, the distance between the side wall of the upper impeller and the side wall of the first shaft seat is less than 0.5mm.

Further, the side of the impeller close to the rotor is provided with a connecting part integrally connected with the impeller and arranged coaxially, the rotor is fixed on the connecting part, and the rotor, the connecting part and the impeller are together The shafts are arranged and co-sleeved on the fixed shafts.

Further, the drive assembly includes a circuit board, a connector and a connecting piece, and a plug port is provided on the end cover of the water pump, the circuit board is fixed on the end cover of the water pump, and the stator clamp Located between the circuit board and the water pump end cover, one end of the connector is connected to the circuit board, and the other end is connected to the engine wiring harness through the socket, and the circuit board is connected to the The stators are connected.

Further, the water pump housing is a water pump housing made of metal castings, and the side of the circuit board away from the end cover of the water pump is bonded to the bottom of the water pump housing by hot melt adhesive.

The present invention also provides a vehicle, which includes the above electric water pump for the engine.

To sum up, in the present invention, by replacing the mechanical water pump with the electric water pump, the free start and stop of the water pump can be realized. Adjustment facilitates the realization of more complex control strategies. Since the electric water pump is not directly driven by the engine, it can reduce mechanical power consumption during the normal operation of the engine; furthermore, the rotor chamber communicates with the spiral chamber, but does not communicate with the control chamber. While eliminating the need for seals between the control room and the control room, the sealing performance is also guaranteed, so that the coolant cannot enter the control room, reducing the loss of coolant and improving the efficiency of the electric water pump; the cooling system is integrated through the water pump bracket Each sub-runner enables the whole machine to be integrated and miniaturized. In addition, the circuit board is directly bonded to the water pump housing made of aluminum alloy through hot melt adhesive, so that the heat generated in the control room can be directly introduced into the external air in time, and the heat dissipation efficiency of the electric water pump is improved.

The above description is only an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable , the following preferred embodiments are specifically cited below, and are described in detail as follows in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a structural schematic diagram of an electric water pump for an engine according to the present invention.

Fig. 2 is a schematic structural diagram of the water pump bracket in Fig. 1 .

Fig. 3 is a structural schematic diagram of another perspective of the water pump bracket in Fig. 1 .

Fig. 4 is a schematic structural diagram of the water pump body in Fig. 1 .

Fig. 5 is a schematic diagram of the structure in which the fixed shaft is fixed on the end cover in Fig. 4 .

Fig. 6 is a structural schematic diagram of the water pump body in Fig. 4 without the rotor and the fixed shaft.

Fig. 7 is a schematic structural view of the water pump body without the water pump housing.

Fig. 8 is a schematic cross-sectional structure diagram of the water pump body.

Fig. 9 is a schematic diagram of an exploded structure of the water pump body.

Fig. 10 is a schematic diagram of an exploded structure of the water pump body from another perspective.

Detailed ways

In order to further illustrate the technical means and functions adopted by the present invention to achieve the intended invention purpose, the present invention will be described in detail below in conjunction with the accompanying drawings and preferred embodiments.

The purpose of the present invention is to provide an engine electric water pump and a vehicle having the same. The engine electric water pump can realize the adjustment of the coolant flow rate under all engine working conditions, and can improve the efficiency of the electric water pump.

Fig. 1 is a schematic structural view of the engine electric water pump of the present invention, Fig. 2 is a schematic structural view of the water pump support in Fig. 1, Fig. 3 is a structural schematic view of another angle of view of the water pump support in Fig. 1, and Fig. 4 is a structure of the water pump body in Fig. 1 Schematic diagram, Fig. 5 is a schematic diagram of the structure of the rotating shaft fixed on the end cover in Fig. 4, Fig. 6 is a schematic diagram of the structure of the water pump body in Fig. 4 without the rotor and fixed shaft, Fig. 7 is a schematic diagram of the structure of the water pump body without the pump housing, Fig. 8 is a schematic cross-sectional structure diagram of the water pump body, FIG. 9 is a schematic diagram of an exploded structure of the water pump body, and FIG. 10 is a schematic diagram of an exploded structure of the water pump body from another perspective. As shown in FIGS. 1 to 10 , the engine electric water pump provided by the present invention includes a water pump bracket 1 and a water pump body 2 . The water pump body 2 is fixed on the water pump bracket 1 and connected to the cooling system through the water pump bracket 1 . The water pump body 2 includes a water pump end cover 20 , a drive assembly 30 , a stator 40 , a fixed shaft 50 , a rotor 61 , an impeller 62 and a water pump housing 80 . The water pump housing 80 is fixed on the water pump end cover 20. The water pump housing 80 and the water pump end cover 20 together form the control chamber 71. The direction is sunken to form a rotor chamber 72, and the side of the water pump end cover 20 away from the water pump casing 80 is fixed on the water pump bracket 1, and forms a spiral chamber together with the water pump bracket 1, wherein the rotor chamber 72 communicates with the spiral chamber and communicates with the control chamber 71 is not connected, the spiral chamber communicates with the inside of the water pump bracket 1 through the coolant inlet and coolant outlet 731, the fixed shaft 50 is fixed in the rotor chamber 72 and the spiral chamber, the rotor 61 is arranged in the rotor chamber 72, and the impeller 62 is arranged in the spiral chamber. The impeller 62 is fixed on the rotor 61, and is rotatably sleeved on the fixed shaft 50 around the fixed shaft 50. The drive assembly 30 is connected with the stator 40 and is located in the control chamber 71. The position of the stator 40 and the rotor 61 are compatible. And sleeved on the outer wall of the rotor chamber 72 .

In the present invention, by replacing the mechanical water pump with an electric water pump, the free start and stop of the water pump can be realized, and the purpose of fast warm-up can be achieved through the zero flow of cooling liquid during the cold start process, and the flow can also be adjusted according to needs, so as to realize more Complicated control strategy, since the electric water pump is not directly driven by the engine, the mechanical power consumption can be reduced during the normal operation of the engine; furthermore, the rotor chamber 72 communicates with the spiral chamber, but does not communicate with the control chamber 71, and the rotor chamber 72 communicates with the control chamber 71. While the sealing member is omitted between the control chambers 71, the sealing performance is also ensured, so that the coolant cannot enter the control chamber 71, the loss of the coolant is reduced, and the efficiency of the electric water pump is improved.

Further, in this embodiment, the water pump casing 80 is fixed to the water pump end cover 20 through a pin shaft, and the connecting bolts 91 pass through the water pump casing 80 and the water pump end cover sequentially from the side of the water pump casing 80 away from the water pump end cover 20 20. Fix the electric water pump on the water pump bracket 1. In this embodiment, preferably, the water pump casing 80 is a metal casting, such as an aluminum alloy casting, and the water pump end cover 20 is made of resin material. Set features 92 nests.

Further, in order to reduce the length of the pipeline and reduce the loss of the coolant pumped by the electric water pump, a first spiral housing 732 is formed on the surface of the water pump end cover 20 away from the water pump casing 80 , and the first spiral casing 732 is formed on the water pump bracket 1 and the first spiral casing 732 . The position corresponding to the housing 732 is formed with a second spiral housing 733. The side of the water pump end cover 20 away from the water pump housing 80 is fixed on the water pump bracket 1. The spiral chamber is composed of the first spiral housing 732 and the second spiral housing. 733, the water pump bracket 1 is integrated with the engine water inlet 11, the engine water outlet 12, the expansion tank interface 13 and the warm air interface 14, wherein the engine water inlet 11 and the engine water outlet 12 are connected to the engine, and the expansion tank interface 13 is connected to the expansion tank The water tank is connected, and the warm air interface 14 is connected with the warm air channel. The sub-flow channels of the cooling system are integrated through the water pump bracket 1, so that the whole machine can be integrated and miniaturized.

Further, a first shaft seat 51 is provided at the bottom of the second spiral housing 733, a second shaft seat 52 is provided at the bottom of the rotor chamber 72, and the fixed shaft 50 is fixed on the first shaft seat 51 and the second shaft seat 52. Between, that is, in this embodiment, there is no connecting pipeline between the water pump body 2 and the water pump support 1, and the cooling liquid pumped from the spiral chamber can directly enter the space between the water pumps.

The coolant inlet is arranged at the bottom of the first shaft seat 51. After the coolant enters the water pump support 1, it enters the spiral chamber through the coolant inlet. In the spiral chamber, a The spiral flow channel 734 and the coolant outlet 731 are set at the end of the spiral flow channel 734 away from the direction where the first shaft seat 51 is located. When the coolant enters the spiral chamber from the coolant inlet, the coolant is driven by the impeller 62 through the spiral flow Channel 734 pumps from coolant outlet 731 .

The impeller 62 is preferably a closed impeller, which includes an upper impeller 621 and a lower impeller 622 , the upper impeller 621 is sleeved on the lower impeller 622 , and the rotor 61 is connected to the lower impeller 622 . When the impeller 62 was rotating, the pressure on the front side of the impeller 62 would be lower than the pressure on the rear side of the impeller 62. In order to reduce the pressure difference on both sides of the impeller 62 and ensure that the impeller 62 would not be displaced, a through hole ( Not shown in the figure), the cooling fluid can flow through the through holes at the front and rear sides of the impeller 62 to reduce the pressure difference on both sides and prevent the impeller 62 from shifting.

Further, in this embodiment, a connecting portion 623 integrally connected with the impeller 62 and coaxially arranged on the side of the impeller 62 close to the rotor 61 is provided. In this embodiment, the connecting portion 623 is integrally formed with the lower impeller 622 , the rotor 61 , such as a magnetic steel, is fixed on the connecting portion 623 to be connected to the impeller 62 , and the rotor 61 , the connecting portion 623 and the impeller 62 are arranged coaxially and sleeved on the fixed shaft 50 .

Further, in this embodiment, the distance between the side wall of the upper impeller 621 and the side wall of the first shaft seat 51 needs to be controlled within a reasonable range, so as to prevent the cooling liquid from flowing back when the distance is too large or the distance is too small To prevent the coolant from flowing out of the spiral chamber, preferably, the distance between the side wall of the upper impeller 621 and the side wall of the first shaft seat 51 is less than 0.5mm.

In this embodiment, the rotor chamber 72 is cylindrical, one end facing the spiral chamber communicates with the spiral chamber, and one end facing the control chamber 71 is closed, and a stator fixing part 41 is arranged on the outer wall surrounding the rotor chamber 72 in the control chamber. The stator 40 is provided between the outer wall of the rotor chamber 72 and the stator fixing portion 41 .

In this embodiment, the drive assembly 30 includes a circuit board 31, a connector 32 and a connecting piece 33, and a socket 34 is provided on the water pump end cover 20, and the circuit board 31 is fixed on the water pump end cover 20 by bolts, and The stator 40 is interposed between the circuit board 31 and the water pump end cover 20 . One end of the connector 32 is connected to the circuit board 31 , and the other end is connected to the engine wiring harness through the socket 34 to realize communication with the ECU. The circuit board 31 is connected to the stator 40 through the connecting piece 33 . When the ECU sends a signal, the electronic water pump recognizes and converts the signal by the circuit board 31 to form an internal signal to control the motor to work. In order to protect the connector 32 , a connector case 35 is provided between the circuit board 31 and the socket 34 , and the connector 32 is disposed in the connector case 35 .

In order to facilitate heat dissipation, the side of the circuit board 31 away from the water pump end cover 20 is bonded to the bottom of the water pump housing 80 through hot melt adhesive, and the heat in the control chamber 71 can be passed through the water pump housing 80 made of hot melt adhesive and metal castings. Passed to the outside of the electric water pump.

In order to facilitate the distribution of the flow entering the water pump bracket 1, a thermostat installation port 15 is also provided on the water pump bracket 1, and the thermostat is installed in the water pump bracket 1 through the thermostat installation port 15 to realize a large radiator. Flow distribution of flow channels such as circulation, internal small circulation and warm air circulation. In order to facilitate the sensing of the coolant temperature, the water pump bracket 1 is also provided with a temperature sensor installation port 16, and the water temperature sensor is inserted into the water pump bracket 1 through the temperature sensor installation port 16 to obtain the temperature of the coolant in the water pump bracket 1, and The temperature of this coolant is fed back to the ECU. In order to increase the sealing performance of the water pump bracket 1 and the water cylinder bracket, a sealing ring 17 is also provided on the engine water inlet 11 and the engine water outlet 12 .

When working, the circuit board 31 inside the electric water pump reads the working state of the stator 40 and the rotor 61 , and forms an electrical signal of the working state to feed back to the ECU through the connector 32 . The water temperature sensor senses the temperature of the coolant in the water pump bracket 1, and transmits the temperature information to the ECU. The ECU updates the control signal in real time through the status fed back by the circuit board 31 and the temperature of the coolant, and sends the control signal to the circuit board 31, and the circuit board 31 adjusts the speed of the electric water pump in real time through the control signal.

To sum up, in the present invention, by replacing the mechanical water pump with the electric water pump, the free start and stop of the water pump can be realized. adjustment to facilitate the realization of more complex control strategies. Since the electric water pump is not directly driven by the engine, it can reduce mechanical power consumption during the normal operation of the engine; furthermore, the rotor chamber 72 communicates with the spiral chamber, but does not communicate with the control chamber 71 , while the seal between the rotor chamber 72 and the control chamber 71 is omitted, the sealing performance is also ensured, so that the coolant cannot enter the control chamber 71, reducing the loss of coolant and improving the efficiency of the electric water pump; through the water pump The bracket 1 integrates each sub-channel of the cooling system, so that the whole machine can be integrated and miniaturized. In addition, the circuit board 31 is directly bonded to the water pump housing 80 made of aluminum alloy by hot melt adhesive, so that the heat generated by the control room 71 can be directly introduced into the outside air in time, and the heat dissipation efficiency of the electric water pump is improved.

The present invention also provides a vehicle, including the above electric water pump for the engine. For other technical features of the vehicle, please refer to the prior art, which will not be repeated here.

The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field Those skilled in the art, without departing from the scope of the technical solution of the present invention, may use the technical content disclosed above to make some changes or modify them into equivalent embodiments with equivalent changes, but as long as they do not depart from the technical solution of the present invention, the Technical Essence Any simple modifications, equivalent changes and modifications made to the above embodiments still fall within the scope of the technical solution of the present invention.

Claims (10)

1. a kind of electric engine water pump, including water pump bracket (1) and water pump body (2), the water pump body (2) are fixed on institute It states on water pump bracket (1), and is connected by the water pump bracket (1) with cooling system, the water pump body (2) includes water pump end Cover (20), drive assembly (30), stator (40), dead axle (50), rotor (61), impeller (62) and water pump cover (80), feature It is：The water pump cover (80) is fixed on the water pump end cap (20), and control is collectively formed with the water pump end cap (20) Room (71) processed, the water pump end cap (20) are equipped with rotor chamber (72) far from the side of the water pump cover (80), the water pump end Lid (20) is fixed on water pump bracket (1) far from the water pump cover (80) side, and spiral is collectively formed with water pump bracket (1) Room, the rotor chamber (72) is connected to the volute, but is not connected to the control room (71), and the volute passes through cooling It is connected to inside liquid import and cooling liquid outlet (731) and the water pump bracket (1), the dead axle (50) is fixed on the rotor chamber (72) and in the volute, the rotor (61) is set in the rotor chamber (72), and the impeller (62) is set to described In volute, the impeller (62) be fixed on the rotor (61) and can be rotationally sheathed on around the dead axle (50) it is described fixed On axis (50), the drive assembly (30) is connected with the stator (40), and is located in the control room (71), the stator (40) it is sheathed on the lateral wall of the rotor chamber (72).

2. electric engine water pump according to claim 1, it is characterised in that：In the water pump end cap (20) far from described The surface of water pump cover (80) is formed with the first shaped spiral housing (732), on water pump bracket (1) with first shaped spiral housing (732) corresponding position is formed with the second shaped spiral housing (733), and the water pump end cap (20) is far from the water pump cover (80) Side be fixed on the water pump bracket (1), the volute is by first shaped spiral housing (732) and second spiral Shell (733) is collectively formed, and the water pump bracket (1) is integrated with engine water inlet (11), engine water outlet (12), expansion Water tank interface (13) and heater tank interface (14).

3. electric engine water pump according to claim 2, it is characterised in that：The bottom of second shaped spiral housing (733) Portion is provided with the first axle bed (51), and the bottom of the rotor chamber (72) is provided with the second axle bed (52), and the dead axle (50) is fixed Between first axle bed (51) and second axle bed (52).

4. electric engine water pump according to claim 3, it is characterised in that：The cooling liquid inlet is set to described The bottom of one axle bed (51), in the volute, from first axle bed (51) to far from the first axle bed (51) direction It is formed with helical flow path (734), the cooling liquid outlet (731) is set to helical flow path (734) far from first axle bed (51) end of direction.

5. electric engine water pump according to claim 3, it is characterised in that：The impeller (62) includes upper impeller (621) and lower impeller (622), upper leaf wheel (621) are sheathed on the lower impeller (622), the rotor (61) with it is described Lower impeller (622) is connected, and through-hole is provided on the lower impeller (622), and coolant liquid can be in the impeller by the through-hole (62) front and rear sides are circulated.

6. electric engine water pump according to claim 5, it is characterised in that：The side wall of upper leaf wheel (621) and institute The distance between side wall of the first axle bed (51) is stated less than 0.5 ㎜.

7. electric engine water pump according to claim 1, it is characterised in that：Close to the rotor on the impeller (62) (61) side is provided with the interconnecting piece (623) for being integrally connected and being coaxially disposed with the impeller (62), and the rotor (61) is solid Due on the interconnecting piece (623), the rotor (61), interconnecting piece (623) and impeller (62) are coaxially disposed and are sheathed on jointly On the dead axle (50).

8. electric engine water pump according to claim 1, it is characterised in that：The drive assembly (30) includes wiring board (31), plug connector (32) and connection sheet (33) are provided with interface (34), the wiring board on the water pump end cap (20) (31) it is fixed on the water pump end cap (20), and the stator (40) is made to be located in the wiring board (31) and the water pump end It covers between (20), one end of the plug connector (32) is connected with the wiring board (31), and the other end passes through the interface (34) It is connected with engine wiring harness, the wiring board (31) is connected by connection sheet (33) with the stator (40).

9. electric engine water pump according to claim 8, it is characterised in that：The water pump cover (80) is metal casting Manufactured water pump cover, side of the wiring board (31) far from the water pump end cap (20) pass through hot melt adhesive and the water pump shell The bottom of body (80) is bonded.

10. a kind of vehicle, it is characterised in that：Including electric engine water pump described in any one of claim 1 to 9.