CN216981730U

CN216981730U - Liquid cooling motor, cooling mechanism and vehicle

Info

Publication number: CN216981730U
Application number: CN202220440244.1U
Authority: CN
Inventors: 崔江涛; 袁帅; 李松松; 陈德鑫
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-03-01
Filing date: 2022-03-01
Publication date: 2022-07-15
Anticipated expiration: 2032-03-01

Abstract

The utility model relates to a liquid cooling motor, a cooling mechanism and a vehicle. A liquid cooling motor includes a housing, a rotor and a draft tube. The casing has the inner chamber, and the rotor includes that both ends are connected in the rotor shaft at the relative both ends of casing to and the rotor core that the rotor shaft just is located the inner chamber is located to the cover, and the rotor shaft is equipped with the first passageway that supplies the coolant liquid to flow into along the first direction, thereby realizes the cooling to the rotor shaft inner wall, and the coolant liquid of first passageway of flowing through passes through second passageway flow direction inner chamber, in order to cool off other parts. So, can carry out abundant cooling to liquid cooling motor inside, avoid because of the cooling is not enough arouses that the motor became invalid and shuts down.

Description

Liquid cooling motor, cooling mechanism and vehicle

Technical Field

The utility model relates to the technical field of driving motors of new energy vehicles, in particular to a liquid cooling motor, a cooling mechanism and a vehicle.

Background

With the continuous development of the new energy automobile driving motor technology, the requirement on the size of the motor is higher and higher, the driving motor is developed towards the directions of high power density and high torque density, the higher heat load is brought, the insulation performance of a motor winding is reduced due to the overhigh heat load, and the temperature of the motor needs to be reduced by using cooling liquid.

In the traditional water-cooled motor, cooling liquid can flow into a cooling water jacket of the water-cooled motor so as to reduce the temperature of the water-cooled motor, however, the traditional water-cooled motor has poor cooling effect, and the phenomenon of failure and shutdown of the motor due to local high temperature still occurs.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a liquid-cooled motor, a cooling mechanism and a vehicle to solve the problem of failure and shutdown of the conventional water-cooled motor due to poor cooling effect.

According to an aspect of the present application, there is provided a liquid-cooled motor including:

a housing having an inner cavity;

the rotor comprises a rotor shaft and a rotor iron core, wherein the two ends of the rotor shaft are connected to the two opposite ends of the shell, the rotor iron core is sleeved on the rotor shaft and is positioned in the inner cavity, and the rotor shaft is provided with a first channel for cooling liquid to flow into along a first direction;

the drainage tube is arranged at least one end of the rotor shaft and is positioned in the inner cavity, and the drainage tube is provided with a second channel which is arranged along a second direction and is communicated with the inner cavity and the first channel so that the cooling liquid flowing into the first channel flows to the inner cavity through the second channel;

the first direction and the second direction are intersected with each other, and the first direction is parallel to the axial direction of the shell.

Above-mentioned liquid cooling motor cools off inner structure through the coolant liquid, and the coolant liquid can flow to the first passageway that the rotor shaft was seted up, and the second passageway flow direction rotor core of rethread drainage tube, and the coolant liquid that flows at first passageway can flow in the second passageway flow direction inner chamber that the drainage tube that is located the rotor shaft both ends was seted up, and the coolant liquid is finally because the bottom of action of gravity flow direction inner chamber. Thereby realize the cooling to rotor shaft inner wall, the coolant liquid that flows through the first passageway flows to the inner chamber through the second passageway to cool off other parts. So, can carry out abundant cooling to motor inside, avoid because of the cooling is not enough arouses that the motor became invalid and shut down.

In one embodiment, the number of the draft tubes includes two, and the two draft tubes are respectively disposed at opposite ends of the rotor shaft.

In one embodiment, the liquid-cooled motor further comprises a stator core sleeved on the rotor core, and a stator winding arranged at the end part of the stator core and surrounding the second channel; a circulation pipeline communicated with the second channel is defined between the stator winding and the drainage tube.

In one embodiment, the draft tube is provided with an oil supply tube extending from an end of the rotor shaft, the oil supply tube having a first flow guide passage formed along a first direction and communicating with the first flow guide passage, and a second flow guide passage formed along a second direction and communicating with the first flow guide passage and the inner chamber, respectively.

In one embodiment, the oil supply pipe is provided with a plurality of second flow guide channels uniformly distributed in the circumferential direction of the first flow guide channel along the second direction.

In one embodiment, a baffle plate facing to the adjacent draft tube is arranged in the first channel, and a liquid inlet hole is formed in one side of the draft tube facing to the baffle plate.

According to another aspect of the present application, there is provided a cooling mechanism including:

the liquid cooling motor; and

and the oil tank is provided with a containing cavity containing cooling liquid, and the containing cavity is communicated with the first channel so as to supply the cooling liquid to the first channel.

In one embodiment, the oil tank is provided with an oil pipeline for conveying cooling liquid, and one end of the oil pipeline is connected with one end of the rotor shaft extending out of the shell, so that the oil pipeline is communicated with the first channel;

the oil pipeline is provided with an oil pump.

In one embodiment, the oil delivery conduit is further provided with a cooling member for reducing the temperature of the cooling fluid flowing from the receiving chamber to the first passage.

According to another aspect of the present application, there is also provided a vehicle including the cooling mechanism of any one of the above.

Above-mentioned vehicle, including the liquid cooling motor, consequently, the motor of the vehicle that this application provided also can be fully cooled off, avoids causing the motor to become invalid and shut down because of the cooling is not enough.

Drawings

FIG. 1 is a schematic diagram illustrating a first perspective view of a cooling mechanism according to an embodiment of the present disclosure;

FIG. 2 is a schematic structural view of a rotor in the cooling mechanism shown in FIG. 1;

FIG. 3 is a schematic view of a portion of the rotor shown in FIG. 2;

fig. 4 is a schematic structural view of an oil supply pipe in the cooling mechanism shown in fig. 1;

fig. 5 is a schematic structural view of a stator core in the cooling mechanism shown in fig. 1.

Reference numerals: 100. a cooling mechanism; 10. a housing; 11. an inner cavity; 20. an oil tank; 21. an accommodating chamber; 22. an oil supply pipe; 221. a first flow guide passage; 222. a second flow guide channel; 23. an oil pipeline; 24. an oil pump; 25. a cooling member; 30. a rotor; 31. a rotor shaft; 311. a first channel; 3111. a baffle plate; 3112. oil sealing; 32. a rotor core; 40. a drainage tube; 41. a second channel; 42. a liquid inlet hole; 50. a stator core; 51. a stator winding; 52. a flow conduit; s1, a first direction; s2, second direction.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

In the traditional water-cooled motor, cooling liquid can flow into a cooling water jacket of the water-cooled motor so as to reduce the temperature of the water-cooled motor, however, the traditional water-cooled motor has poor cooling effect, and the phenomenon of failure and shutdown of the motor due to local high temperature can still occur.

The inventor of the present application finds, through research, that the reason that the cooling effect of the conventional water-cooled motor is poor is that: traditional water-cooled motor can only the rotor shaft, can't cool off rotor core and stator winding tip, leads to the motor cooling not enough, appears the phenomenon of winding local high temperature even and leads to the condition that the motor became invalid and shut down.

In order to solve the problem that the cooling effect of a traditional water-cooled motor is poor, the inventor of the application designs a liquid-cooled motor through deep research, so that the rotor can be cooled, the end part of a stator winding can be cooled, the cooling effect can be improved, and the failure and shutdown of the motor are avoided.

Referring to fig. 1 to 4, fig. 1 is a structural schematic diagram of a cooling mechanism 100 according to an embodiment of the present disclosure from a first perspective, fig. 2 is a structural schematic diagram of a rotor 30 in the cooling mechanism 100 shown in fig. 1, fig. 3 is a partial structural schematic diagram of the rotor 30 shown in fig. 2, and fig. 4 is a structural schematic diagram of an oil supply pipe 22 in the cooling mechanism 100 shown in fig. 1.

An embodiment of the present application provides a liquid-cooled motor, including: a housing 10, a rotor 30 and a draft tube 40.

The housing 10 has an inner cavity 11, and the rotor 30 includes a rotor shaft 31 having two ends connected to two opposite ends of the housing 10, and a rotor core 32 sleeved on the rotor shaft 31 and located in the inner cavity 11. The rotor shaft 31 is provided with a first passage 311 in the first direction S1 for the inflow of the cooling liquid so that the cooling liquid enters the rotor shaft 31.

The draft tube 40 is disposed at least one end of the rotor shaft 31 and located in the inner cavity 11, and the draft tube 40 has a second passage 41 disposed in the second direction S2 and communicating the inner cavity 11 and the first passage 311, so that the cooling liquid flowing in the first passage 311 flows to the inner cavity 11 through the second passage 41. Wherein the first direction S1 and the second direction S2 intersect with each other, and the first direction S1 is parallel to the axial direction of the housing 10.

The cooling liquid entering the inner cavity 11 of the housing 10 first flows into the first passage 311 arranged in the first direction S1, and then flows to the rotor core 32 through the second passage 41 of the draft tube 40, the cooling liquid flowing in the first passage 311 can cool the rotor shaft 31, the cooling liquid flowing in the first passage 311 to the second passage 41 can flow in the inner cavity 11, the cooling liquid finally flows to the bottom of the inner cavity 11 due to gravity, and the flow path of the cooling liquid can refer to the arrow path in fig. 1. So, can cool off the inner structure of liquid cooling motor through the coolant liquid, avoid causing the motor to become invalid and shut down because of the cooling is not enough.

In some embodiments, the number of the draft tubes 40 includes two, the two draft tubes 40 are respectively disposed at two opposite ends of the rotor shaft 31, the cooling liquid flowing through the first channel 311 can flow to the inner cavity 11 through the second channel 41 as much as possible through the draft tubes 40 at the two opposite ends of the rotor shaft 31, and the cooling liquid flows through the second channels 41 at the two ends, so that the cooling effect can be effectively improved, and the normal operation of the motor can be ensured.

Referring to fig. 1 and 5 again, fig. 5 is a schematic structural diagram of the stator core 50 in the cooling mechanism 100 shown in fig. 1.

In some embodiments, the liquid-cooled motor further includes a stator core 50 sleeved on the rotor core 32, and a stator winding 51 disposed at an end of the stator core 50 and surrounding the second channel 41, wherein a circulation channel 52 communicating with the second channel 41 is defined between the stator winding 51 and the drainage tube 40. The cooling fluid flowing through the flow channels 52 from the second channels 41 on both sides may contact the stator windings 51 to achieve the effect of cooling the stator windings 51.

Specifically, the stator windings 51 include insulation thereon, which, if the windings are not cooled sufficiently, can result in localized high temperatures on the windings, causing the insulation to burn away, thereby causing the motor to fail and shut down. Therefore, the cooling fluid flowing through the circulation duct 52 from the second passages 41 on both sides can contact the stator winding 51, so that the stator winding 51 can be sufficiently cooled to ensure the normal operation of the motor.

Referring to fig. 1-3 again, in some embodiments, the draft tube 40 is provided with an oil supply tube 22 extending out of one end of the rotor shaft 31, the oil supply tube 22 is provided with a first flow guiding channel 221 along the first direction S1 and communicated with the first channel 311, and a second flow guiding channel 222 along the second direction S2 and respectively communicated with the first flow guiding channel 221 and the inner cavity 11, the first flow guiding channel 221 can guide the cooling liquid to flow into the first channel 311 from the accommodating cavity 21, and the second flow guiding channel 222 can guide the cooling liquid to flow into the inner cavity 11 from the first flow guiding channel 221, so as to provide the cooling liquid for exchanging heat with the rotor core 32 in the inner cavity 11, thereby ensuring that the interior of the motor is cooled as much as possible.

In some embodiments, the oil supply pipe 22 is opened with a plurality of first flow guiding channels 221 uniformly distributed in the circumferential direction of the first flow guiding channels 221 along the second direction S2, so as to ensure that as much coolant as possible flows to the flow channel 52, thereby ensuring that the stator winding 51 can be sufficiently cooled.

In some embodiments, a baffle 3111 facing the adjacent draft tube 40 is disposed in the first passage 311, a liquid inlet hole 42 is disposed on a side of the draft tube 40 facing the baffle 3111, and the cooling liquid flowing through the first passage 311 contacts the baffle 3111 during the moving process, and then changes the moving direction to flow into the draft tube 40 through the liquid inlet hole 42, so as to ensure that the volumes of the cooling liquid flowing through the draft tubes 40 at both ends are the same, thereby ensuring that the stator windings 51 at both ends can be sufficiently cooled.

In some embodiments, the oil tank 20 includes an oil pipeline 23 for conveying a cooling liquid, one end of the oil pipeline 23 is communicated with the iron core of the inner rotor 30, and the cooling liquid positioned inside the housing accommodating chamber 21 can be conveyed to the iron core of the inner rotor 30 through the oil pipeline 23, thereby achieving a function of cooling the motor.

An embodiment of the present application provides a cooling mechanism 100, including the above-mentioned liquid-cooled motor and an oil tank 20, wherein the oil tank 20 has a receiving chamber 21 for receiving cooling liquid, and the receiving chamber 21 is communicated with the first passage 311 to supply the cooling liquid to the first passage 311.

The cooling mechanism 100 cools the liquid-cooled motor by the coolant in the tank 20. The cooling liquid in the accommodating cavity 21 flows to the inner wall of the rotor shaft 31 through the first passage 311, the cooling liquid for cooling the first passage 311 of the rotor shaft 31 flows to the second passage 41, and then flows to the circulating pipeline 52 to cool the rotor core 32 and the stator winding 51, and finally the cooling liquid flows to the bottom of the inner cavity 11 from the circulating pipeline 52 under the action of gravity, and then flows to the accommodating cavity 21, so that the cooling liquid can circulate and circulate inside the cooling mechanism 100, therefore, the cooling mechanism 100 provided by the application can cool all parts in the liquid cooling motor and can also save the cooling liquid.

In some embodiments, the oil tank 20 is provided with an oil delivery pipe 23 for delivering the cooling liquid, and one end of the oil delivery pipe 23 is connected to the end of the rotor shaft 31 protruding out of the housing 10 so that the oil delivery pipe 23 communicates with the first passage 311. The oil pump 24 is arranged on the oil pipeline 23, and under the action of the oil pump 24, the cooling liquid source can be pushed to continuously flow to the oil pipeline 23, so that the cooling liquid can cool the interior of the motor all the time.

In some embodiments, the oil pipeline 23 is further provided with a cooling element 25, so as to reduce the temperature of the cooling liquid flowing from the accommodating cavity 21 to the first channel 311, the cooling liquid flowing through the inner cavity 11 finally flows to the oil tank 20, so as to realize the recycling of the cooling liquid, after the cooling liquid absorbs the heat of internal parts of the motor, such as the iron core of the inner rotor 30, the stator winding 51 and the like, the temperature of the cooling liquid can be raised to a certain extent, and the cooling liquid passing through the cooling element 25 can be cooled, so as to ensure that the cooling effect of the circulated cooling liquid on the inside of the motor is better.

In some embodiments, an oil seal 3112 is provided at an end of the rotor shaft 31 communicating with the oil delivery pipe 23, thereby preventing leakage of the coolant.

An embodiment of the present application provides a vehicle including the cooling mechanism 100 described above.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a liquid cooling motor which characterized in that, liquid cooling motor includes:

a housing having an interior cavity;

the rotor comprises a rotor shaft and a rotor iron core, wherein two ends of the rotor shaft are connected to two opposite ends of the shell, the rotor iron core is sleeved on the rotor shaft and is positioned in the inner cavity, and the rotor shaft is provided with a first channel for cooling liquid to flow in along a first direction;

a draft tube disposed at least one end of the rotor shaft and located in the inner cavity, the draft tube having a second channel disposed in a second direction and communicating the inner cavity and the first channel, so that the cooling liquid flowing into the first channel flows to the inner cavity through the second channel;

wherein the first direction and the second direction intersect each other, and the first direction is parallel to an axial direction of the housing.

2. The liquid-cooled motor of claim 1, wherein the number of drains includes two drains, the two drains being disposed at opposite ends of the rotor shaft.

3. The liquid-cooled motor of claim 2, further comprising a stator core sleeved on the rotor core, and a stator winding disposed at an end of the stator core and surrounding the second channel;

and a circulation pipeline communicated with the second channel is defined between the stator winding and the drainage tube.

4. The liquid-cooled motor of claim 3, wherein the drain tube includes an oil supply tube extending from an end of the rotor shaft, the oil supply tube defining a first flow path in a first direction and communicating with the first flow path, and a second flow path in a second direction and communicating with the first flow path and the inner chamber, respectively.

5. The liquid-cooled motor of claim 4, wherein the oil supply pipe is provided with a plurality of second flow guide channels uniformly distributed along the second direction in the circumferential direction of the first flow guide channel.

6. The liquid-cooled motor of claim 1, wherein a baffle plate facing an adjacent draft tube is disposed in the first passage, and a liquid inlet hole is disposed on a side of the draft tube facing the baffle plate.

7. A cooling mechanism, comprising:

a liquid-cooled motor as claimed in any one of claims 1 to 6; and

an oil tank having a housing chamber that houses a coolant, the housing chamber communicating with the first passage to supply the coolant to the first passage.

8. The cooling mechanism according to claim 7, wherein the oil tank is provided with an oil delivery pipe for delivering the cooling liquid, and one end of the oil delivery pipe is connected to an end of the rotor shaft extending out of the housing so that the oil delivery pipe communicates with the first passage;

the oil pipeline is provided with an oil pump.

9. The cooling mechanism according to claim 8, wherein a cooling member is further provided on the oil delivery pipe to lower the temperature of the cooling liquid flowing from the receiving chamber to the first passage.

10. A vehicle comprising the cooling mechanism of any one of claims 7 to 9.