WO2018184327A1

WO2018184327A1 - Motor cooling system

Info

Publication number: WO2018184327A1
Application number: PCT/CN2017/095223
Authority: WO
Inventors: 张敬才; 张胜川; 李鹏; 夏继; 张诗香
Original assignee: 上海蔚来汽车有限公司
Priority date: 2017-04-07
Filing date: 2017-07-31
Publication date: 2018-10-11

Abstract

The present invention belongs to the field of motors, and specifically provides a motor cooling system. The present invention aims to solve the problem of complex cooling system structures in existing motors. The motor cooling system comprises a first cooling channel and a second cooling channel arranged between a first water pipe and a second water pipe on a housing, the first cooling channel being arranged on the housing, the second cooling channel comprising: a first channel, arranged within the housing; a second channel, arranged within a rotary shaft; a communication channel, arranged at an end portion of a motor, the first channel being in communication with the second channel via the communication channel, so as to form the second cooling channel. Therefore, the motor cooling system enables a coolant to simultaneously reduce the temperature of a stator and a rotor of the motor, thereby increasing the cooling efficiency of the motor, and decreasing the complexity of the motor cooling system.

Description

Motor cooling system

Technical field

The invention belongs to the field of electric machines, and in particular provides a motor cooling system.

Background technique

With the continuous advancement of science and technology, high power and high torque density motors are being used more and more. However, high power and high torque density motors have a high temperature rise during use, which has a serious impact on the performance, efficiency, and longevity and reliability of the motor. In order to reduce the temperature rise of the motor, it is usually necessary to cool the stator and the rotor of the motor. For example, a cooling passage is respectively arranged on the stator (such as the casing) of the motor and the rotor (such as the rotating shaft), and the cooling pipes are respectively connected to each other so that the coolant can be The cooling pump is circulated in the cooling passage on the casing and the rotating shaft, thereby taking away a large amount of heat generated during the operation of the motor, so that the motor reaches a cooling effect.

However, the motor that externally connects the cooling tube on the casing and the rotating shaft requires more components and a longer flow path, which makes the structure of the motor cooling system more complicated.

Accordingly, there is a need in the art for a new motor cooling system to address the above problems.

Summary of the invention

In order to solve the above problems in the prior art, that is, to solve the problem of complicated structure of the cooling system of the prior art, the present invention provides a motor cooling system including a casing, an end cover, a stator, a rotor and a rotating shaft. The casing is provided with a first nozzle and a second nozzle, and the motor cooling system includes a first cooling passage and a second cooling passage disposed between the first nozzle and the second nozzle, wherein The first cooling passage is disposed on the casing, and the two ends of the first cooling passage are respectively connectable with the first nozzle and the second nozzle; wherein the second cooling passage comprises: a first passage disposed in the casing, one end of the first passage being connectable with the first nozzle; a second passage disposed in the rotating shaft; and a communication passage disposed at the An end of the motor, the communication passage is configured to communicate the other end of the first passage with one end of the second passage, and communicate the other end of the second passage with the second nozzle.

In a preferred embodiment of the motor cooling system, the motor cooling system further includes a communication member, the communication member is disposed at an end of the motor, and the communication passage is disposed in the communication member.

In a preferred embodiment of the motor cooling system described above, the connecting member is a flow splitter.

In a preferred embodiment of the motor cooling system, the second passage includes: a shaft hole disposed in the shaft; and a rotor water pipe disposed in the shaft hole and communicating with the shaft hole; wherein One end of the rotor water pipe is fixed to the end of the motor.

In a preferred embodiment of the motor cooling system, the communication passage includes a first communication passage and a second communication passage, wherein the first communication passage is configured to communicate the first passage and the shaft hole, The second communication passage is configured to communicate the rotor water pipe and the second water nozzle.

In a preferred embodiment of the motor cooling system described above, a partition is disposed in the casing of the motor, and the first cooling passage and the first passage are separated by the partition.

In a preferred embodiment of the motor cooling system described above, the partition is integrally formed with the casing.

In a preferred embodiment of the motor cooling system, the partition plate is respectively provided with a communication hole at a position corresponding to the first nozzle and the second nozzle, and both ends of the first cooling passage pass through the communication hole Communicating with the first nozzle and the second nozzle, respectively.

In a preferred embodiment of the motor cooling system, the first cooling passage is spiral or S-shaped along the axial direction of the motor, and the first passage has a spiral shape or an S shape along the axial direction of the motor.

In a preferred embodiment of the above motor cooling system, the first cooling passage and the second cooling passage are parallel cooling passages.

It can be understood by those skilled in the art that, in a preferred technical solution of the present invention, a first cooling channel and a second cooling channel are disposed between the first nozzle and the second nozzle of the motor, and specifically, the first cooling channel is disposed at On the casing, the two ends of the first cooling passage are respectively connected to the first nozzle and the second nozzle. The second cooling passage is composed of a first passage disposed in the casing, a second passage disposed in the rotating shaft, and a communication passage disposed at the end of the motor for communicating the first passage and the second passage, wherein the first passage One end of the first passage communicates with the first nozzle, and the other end of the first passage communicates with one end of the second passage through the communication passage, and the other end of the second passage communicates with the second nozzle through the communication passage. Therefore, the motor cooling system of the present invention Only two external nozzles are connected to the first nozzle and the second nozzle respectively, so that the casing and the rotor of the motor can be connected to the coolant, thereby simplifying the structure of the motor cooling system and reducing the complexity of the motor compared with the prior art. Degree, saving costs. Further, the cooling liquid can be double-cooled by the first cooling passage and the first passage provided on the casing, thereby improving the cooling efficiency of the motor with respect to the prior art.

In another aspect, the present invention provides another motor cooling system, the motor comprising a casing, an end cover, a stator, a rotor and a rotating shaft, the casing being provided with a first nozzle and a second nozzle, the cooling The system includes: a first cooling passage disposed on the casing, one end of the first cooling passage being communicable with the first nozzle; and a second cooling passage disposed on the casing, the One end of the two cooling passages can communicate with the second nozzle; a third cooling passage disposed in the rotating shaft; and a communication passage disposed at an end of the motor, the communication passage being used for The other end of the first cooling passage communicates with one end of the third cooling passage, and the other end of the second cooling passage communicates with the other end of the third cooling passage.

In a preferred embodiment of the motor cooling system described above, the cooling system further includes a communication member disposed at an end of the motor, and the communication passage is disposed in the communication member.

In a preferred embodiment of the motor cooling system, the third cooling passage includes: a rotating shaft hole disposed in the rotating shaft; and a rotor water pipe disposed in the rotating shaft hole and communicating with the rotating shaft hole; One end of the rotor water pipe is fixed to an end of the motor.

In a preferred embodiment of the motor cooling system, the communication passage includes a first communication passage and a second communication passage, wherein the first communication passage is configured to communicate the first cooling passage and the rotating shaft hole, The second communication passage is configured to communicate the rotor water pipe and the second cooling passage.

In a preferred embodiment of the motor cooling system, corresponding to the first nozzle and the second nozzle, a first water pipe and a second water pipe are disposed on the motor, and the first water pipe passes through the first The water inlet is only in communication with the first cooling passage, and the second water conduit is in communication with the second cooling passage through the second nozzle.

In a preferred technical solution of the motor cooling system, the casing includes a first casing and a second casing, and the first cooling passage and the second cooling passage are respectively disposed at the first casing and the Said inside the second casing.

In a preferred technical solution of the motor cooling system, the casing includes a first casing and a second casing, and a partition is disposed between the first casing and the second casing, the first A cooling passage and the second cooling passage are disposed on the first casing and the second casing, respectively.

In a preferred embodiment of the motor cooling system, the first cooling passage is spiral or S-shaped along the axial direction of the motor, and the second cooling passage is spiral or S-shaped along the axial direction of the motor.

In a preferred embodiment of the motor cooling system described above, the first cooling passage and the second cooling passage and the third cooling passage form a series cooling passage through the communication passage.

It can be understood by those skilled in the art that, in a preferred technical solution of the present invention, a first cooling passage having one end communicating with the first nozzle and a second cooling passage having one end communicating with the second nozzle are disposed on the casing of the motor, a third cooling passage is disposed on the rotating shaft of the motor, and a communication passage is disposed at an end of the motor, so that the other end of the first cooling passage and the other end of the second cooling passage can communicate through the communication passage and the third passage, thereby further cooling liquid It can be circulated in the casing of the motor and in the rotating shaft in turn, so as to take away the heat generated by the stator and the rotor during the operation of the motor. Therefore, the motor cooling system of the present invention requires only two external water pipes to be respectively connected to the first nozzle and the second nozzle, so that the casing and the rotor of the motor can be supplied with the coolant, thereby simplifying the motor cooling system with respect to the prior art. The structure reduces the complexity of the motor and saves costs. Further, the cooling liquid can be recooled to the casing by the first cooling passage and the second cooling passage provided on the casing, thereby improving the cooling efficiency of the motor with respect to the prior art.

DRAWINGS

Figure 1 is a cross-sectional view of a motor cooling system in accordance with one embodiment of the present invention;

Figure 2 is an effect view of the motor cooling system of Figure 1;

Figure 3 is a schematic diagram of the motor cooling system of Figure 1;

4 is a schematic view showing the effect of a motor cooling system according to another embodiment of the present invention;

Figure 5 is a cross-sectional view of the motor cooling system of Figure 4;

Figure 6 is a cross-sectional view of still another embodiment of the motor cooling system of the present invention.

detailed description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention, and are not intended to limit the scope of the present invention. For example, although the components in the drawings are drawn in a proportional relationship, the proportional relationship is not constant, and those skilled in the art can adjust them according to needs to adapt to specific applications, and the adjusted technology. The solution will still fall within the scope of protection of the present invention.

It should be noted that, in the description of the present invention, the terms of the directions of "upper", "lower", "left", "right", "inside", "outside", etc. are indicated based on the drawings. The illustrated orientation or positional relationship is merely for convenience of description, and is not intended to suggest or imply that the device or component must have a particular orientation, configuration and operation in a particular orientation, and thus is not to be construed as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, it should be noted that in the description of the present invention, the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed connections, for example, or It is a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and may be internal communication between the two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

The motor cooling system shown in FIG. 1 mainly includes a casing 1, a stator (not shown), a rotor (not shown), a rotating shaft 2, and a flow divider 3 at the end of the motor. The casing 1 includes an inner casing 11 and an outer casing 12, and the inside of the inner casing 11 is provided with a first cooling passage 111, and the inside of the outer casing 12 is provided with a first passage 121. Preferably, the first cooling passage 111 and the first passage 121 are both spiral or S-shaped cooling passages along the axial direction of the motor, so as to increase the contact area between the casing 1 and the coolant, and improve the heat dissipation efficiency of the motor. Further, the left end of the first cooling passage 111 shown in FIG. 1 communicates with the first water pipe 13 disposed on the casing 1 through the first nozzle, and the right end of the first cooling passage 111 shown in FIG. 1 passes through the second nozzle. The second water tubes 14 disposed on the casing 1 are in communication. Further, the left end of the first passage 121 shown in FIG. 1 passes through the first nozzle and the first one disposed on the casing 1. The water pipes 13 are in communication, and the right end of the first passage 121 shown in Fig. 1 communicates with the second passage 21 in the rotary shaft 2 through a communication passage in the flow divider 3.

Referring to FIG. 1, a first groove (not shown) is disposed on the outer wall of the inner casing 11, and a second groove (not shown) is disposed on the inner wall of the outer casing 12, and A partition 15 is disposed between the inner casing 11 and the outer casing 12, so that the first groove can form a first cooling passage 111 and a second groove between the first groove and the partition 15 in the assembled state. A first passage 121 is formed with the partition 15. Those skilled in the art can understand that the above structures of the inner casing 11 and the outer casing 12 can optimize the manufacturing process of the first cooling passage 111 and the first passage 121, for example, using a turning process instead of the die casting process, and at the same time When the cooling passage 111 and the first passage 121 are damaged and leaked, it is convenient to disassemble and repair. It should be noted that, in order to prevent the water leakage phenomenon of the casing 1 in the assembled state, a sealing ring (not shown) is disposed between the two ends of the partition plate 15 and the inner casing 11 and the outer casing 12 . .

Further, the partition plate 15 is respectively provided with a communication hole (not shown) at a position corresponding to the first water pipe 13 and the second water pipe 14, and the two ends of the first cooling passage 111 can respectively pass through the communication hole and the first water pipe 13 is in communication with the second water pipe 14.

In addition, the person skilled in the art can also remove the partition plate 15 as needed, and in the assembled state of the casing 1, the first groove can be formed with the inner wall of the outer casing 12 to form a first cooling passage 111, the second concave The first passage 121 is formed between the groove and the outer wall of the inner casing 11, so that the assembly process of the casing 1 can be simplified. Further, in order to prevent water leakage between the first cooling passage 111 and the first passage 121, a seal ring may be disposed between the first cooling passage 111 and the first passage 121.

In addition, the person skilled in the art can integrally cast the partition plate 15 with the inner casing 11 and the outer casing 12 as needed.

Continuing to refer to FIG. 1, a second passage 21 is disposed in the shaft 2. Specifically, a shaft hole (not shown) is disposed in the rotating shaft 2 for accommodating a rotor water pipe (not shown), and the rotor water pipe is fixedly connected to the end of the motor. An annular cavity 211 is formed between the inner wall of the shaft hole and the outer wall of the rotor water pipe, and the annular cavity 211 and the inner cavity 212 of the rotor water pipe together form a second passage 21 for allowing coolant to flow from the annular cavity 211 to the inner cavity 212 or Flow from the inner chamber 212 to the annular chamber 211 allows the flowing coolant to quickly carry away the heat of the shaft 2. Further, those skilled in the art can also provide the second passage 21 to a structure of another shape as needed, for example, the annular cavity 211 is arranged in a spiral shape along the axis of the rotary shaft 2.

As shown in Figures 1 and 2, the flow splitter 3 is preferably detachably disposed at the end of the motor by bolts (not shown) to facilitate machining, manufacture and maintenance of the motor and shunt 3, or in the art. The technician can also fixedly connect the shunt 3 to the end of the motor by other connections, such as welding, as needed, and the person skilled in the art can also integrally form the shunt 3 and the end of the motor as a whole. Further, the flow divider 3 includes a first connecting beam 31 and a second connecting beam 32, and a first communication channel 311 is disposed in the first connecting beam 31, and a second communication channel 321 is disposed in the second connecting beam 32. The passage 311 and the second communication passage 321 together constitute the communication passage described above. The first communication passage 311 is configured to communicate the first passage 121 and the second passage 21 (such as the annular cavity 211), and the second communication passage 321 is configured to connect the second passage 21 (such as the inner cavity 212) with the casing 1 The second water pipe 14 is in communication such that the first passage 121, the second passage 21, the first communication passage 311, and the second communication passage 321 form a second cooling passage, so that the coolant can flow directly from the casing 1 into the rotating shaft 2 The shaft and rotor are cooled. It should be noted that the second communication passage 321 communicates with the second water pipe 14 through the communication hole 122 provided in the outer casing 12, and preferably the first passage 121 and the communication hole 122 are not connectable on the outer casing 12.

It will be understood by those skilled in the art that the cooling passages on the motor casing and the cooling passages on the rotating shaft are communicated by external piping in the prior art. In a preferred embodiment of the present invention, the first communication passages 311 And the second communication passage 321 is not only short in the flow path, but also can effectively reduce the resistance when the coolant flows through the flow divider by adjusting the sectional areas of the first communication passage 311 and the second communication passage 321 .

In addition, in addition to the flow divider 3 shown in FIG. 1 and FIG. 2, those skilled in the art may also select other forms of communication members to respectively connect the first passage 121 and the communication hole 122 with the annular cavity 211 of the second passage 21, respectively. It is in communication with the inner chamber 212, for example, the connecting member is a relatively large diameter pipe. It can be understood by those skilled in the art that the channel connecting the first channel 121 and the annular cavity 211 and the channel connecting the communication hole 122 and the inner cavity 212 may be one piece or multiple pieces, such as two or three. , five, and so on.

As shown in FIG. 3, the motor cooling system includes a first cooling passage 111 for cooling the stator of the motor and the casing 1, and a second cooling passage (not shown) for mainly rotating the shaft 2 of the motor, wherein the second The cooling passage mainly includes a first passage 121 disposed on the casing 1, a second passage 21 disposed in the rotating shaft 2, and a communication passage provided on the flow divider 3 for communicating the first passage 121 and the second passage 21 (311) And 321).

When the motor cooling system of the present invention is in use, the coolant enters the first cooling passage 111 and the first passage 121 through the first water pipe 13, respectively, wherein the coolant flowing through the first passage 121 flows into the annular chamber 211 through the first communication passage 311. Finally, the inner cavity 212, the second communication passage 321, the communication hole 122 and the second water pipe 14 flow out; the coolant flowing through the first cooling passage 111 flows directly from the other end of the first cooling passage 111 through the second water pipe 14. Alternatively, a person skilled in the art can also flow the coolant from the second water pipe 14 into the motor as needed, and flow out from the first water pipe 13.

In a preferred embodiment of the invention, the coolant is water, or other media may be selected as a coolant, such as a hydraulic fluid, as desired by those skilled in the art.

In addition, the person skilled in the art can also appropriately adjust the motor cooling system of the present invention under the premise that the coolant can flow through the casing and the rotating shaft, for example, the first cooling passage 111 in the inner casing 11 is shunted. The device 3 communicates with the second passage 21 in the rotating shaft 2 such that both ends of the first passage 121 in the outer casing 12 directly communicate with the first water pipe 13 and the second water pipe.

It will be understood by those skilled in the art that the cooling passages (111, 121) on the casing 1 are communicated with the second passage 21 on the rotating shaft 2 through the first connecting beam 31 and the second connecting beam 32, so that the motor only needs Providing an inlet pipe and an outlet pipe (the first water pipe 13 and the second water pipe 14) can ensure that the casing 1 and the rotating shaft 2 can be simultaneously cooled, thereby being compared with the prior art motor cooling system (collection of cooling components). Reduced complexity. At the same time, the cooling liquid can double-cool the casing 1 through the first cooling passage 111 and the first passage 121 provided on the casing 1, thereby improving the cooling efficiency of the motor with respect to the prior art.

4 and 5, as a second embodiment of the present invention, the motor cooling system mainly includes a casing 1, a stator (not shown), a rotor (not shown), a rotating shaft 2, and a motor end. Part of the shunt 3. The casing 1 includes an inner casing 11 as a first casing and an outer casing 12 as a second casing, and the inside of the inner casing 11 is provided with a first cooling passage 111, and the outer casing 12 is internally disposed. There is a second cooling passage 121. Preferably, the first cooling passage 111 and the second cooling passage 121 are both spiral or S-shaped cooling passages along the axial direction of the motor, so as to increase the contact area between the casing 1 and the coolant, and improve the heat dissipation efficiency of the motor. Further, the left end of the first cooling passage 111 shown in FIG. 5 communicates with the first water pipe 13 through a first nozzle (not shown) provided on the casing 1, and the second cooling passage 111 shown in FIG. The left end is in communication with the second water pipe 14 through a second nozzle (not shown) provided on the casing 1.

It can be understood by those skilled in the art that the casing 1 is divided into an inner casing 11 and an outer casing 12, and a first cooling passage 111 and a second cooling passage are respectively disposed on the inner casing 11 and the outer casing 12. 121, can facilitate the processing, manufacture and maintenance of the casing 1.

With continued reference to FIG. 5, a third cooling passage 21 is disposed in the rotating shaft 2. Specifically, a shaft hole (not shown) is disposed in the rotating shaft 2 for accommodating a rotor water pipe (not shown), and the rotor water pipe is fixedly connected to the end of the motor. An annular cavity 211 is formed between the inner wall of the shaft hole and the outer wall of the rotor water pipe. The annular cavity 211 and the inner cavity 212 of the rotor water pipe together form a third cooling passage 21 for allowing coolant to flow from the annular cavity 211 to the inner cavity 212. Or flowing from the inner cavity 212 to the annular cavity 211, so that the flowing coolant can quickly carry away the heat of the rotating shaft 2. Further, the person skilled in the art can also arrange the third cooling passage 21 into a structure of another shape as needed, for example, the annular cavity 211 is arranged in a spiral shape along the axis of the rotating shaft 2.

With further reference to Figure 5, the flow splitter 3 is preferably detachably disposed at the end of the motor by bolts (not shown) to facilitate machining, manufacture and maintenance of the motor and shunt 3, or can be used by those skilled in the art. If necessary, the shunt 3 is fixedly connected to the end of the motor by other means of connection, such as welding, and the person skilled in the art can also integrally form the shunt 3 and the end of the motor as a single unit. Further, the flow divider 3 includes a first connecting beam 31 and a second connecting beam 32, and a first communication channel 311 is disposed in the first connecting beam 31, and a second communication channel 321 is disposed in the second cooling beam 32. The first communication channel 311 is configured to communicate with the first cooling channel 111 and the third cooling channel 21 (eg, the annular cavity 211), and the second communication channel 321 is configured to communicate with the second cooling channel 121 and the third cooling channel 21 (eg, the inner cavity 212) The first cooling passage 111, the first communication passage 311, the third cooling passage 21, the second communication passage 321 and the second cooling passage 121 are sequentially connected in series as an integral cooling passage, thereby enabling the coolant to pass from the first water conduit. 13 enters the first cooling passage 111 and finally flows out of the second water pipe 14 via the second cooling passage 121.

In addition, in addition to the shunt 3 shown in FIG. 4 and FIG. 5, those skilled in the art can also select other types of connecting members to connect the first cooling passage 111 and the second cooling as needed. The passage 121 communicates with the annular chamber 211 and the inner chamber 212 of the third cooling passage 21, respectively, for example, the communicating member is a pipe having a larger diameter. It can be understood by those skilled in the art that the channel connecting the first cooling channel 111 and the annular cavity 211 and the channel connecting the second cooling channel 121 and the inner cavity 212 may be one piece or multiple pieces, such as two. Articles, three, five, etc.

Referring finally to Figure 6, as a third embodiment of the present invention, a spacer 15 is added to the second embodiment. Specifically, a partition 15 is disposed between the inner casing 11 and the outer casing 12 for partitioning the first cooling passage 111 and the second cooling passage 121. More specifically, a first groove (not shown) may be disposed on the outer wall of the inner casing 11, and a second groove (not shown) may be disposed on the inner wall of the outer casing 12 to make the machine In the assembled state, the first groove can form a first cooling passage 111 with the partition 15, and the second cooling passage 121 is formed between the second groove and the partition 15, thereby facilitating the casing 1 Processing, manufacturing and maintenance. Further, the partition plate 15 is respectively provided with a communication hole (not shown) at a position corresponding to the first water pipe 13 and the second water pipe 14, so that the left end of the first cooling passage 111 and the first water pipe shown in FIG. 13 is connected, and the left end of the second cooling passage 111 shown in FIG. 5 is in communication with the second water pipe 14.

Those skilled in the art can understand that the above structures of the inner casing 11 and the outer casing 12 can optimize the manufacturing process of the first cooling passage 111 and the second cooling passage 121, for example, using a turning process instead of the die casting process, When the first cooling passage 111 and the second cooling passage 121 are damaged and leaked, it is convenient to disassemble and repair. It should be noted that, in order to prevent the water leakage phenomenon of the casing 1 in the assembled state, a sealing ring is further disposed between the two ends of the partition plate 15 and the inner casing 11 and the outer casing 12.

Further, although not shown in the drawings, as a third embodiment of the present invention, the partition plate 15 is removed on the basis of the second embodiment, and in the assembled state of the casing 1, the first groove can be made externally A first cooling passage 111 is formed between the inner walls of the casing 12, and a third cooling passage 21 is formed between the second recess and the outer wall of the inner casing 11, thereby simplifying the assembly process of the casing 1. Alternatively, a person skilled in the art can integrally cast the partition plate 15 with the inner casing 11 and the outer casing 12 as needed.

In the first, second and third embodiments of the present invention, the motor cooling system mainly includes a first cooling passage 111 and a second cooling passage 121 for cooling the stator and the casing 1 of the electric machine for cooling the rotor and the rotating shaft The third cooling passage 21 of the second cooling passage 21 and the communication passage (not shown) for communicating the third cooling passage 21 with the first cooling passage 111 and the second cooling passage 121, respectively. Specifically, the communication channel includes a first communication channel 311 and a second communication channel The first communication passage 311 is configured to communicate with the first cooling passage 111 and the third cooling passage 21, and the second communication passage 321 is configured to communicate the second cooling passage 121 and the third cooling passage 21. So that the coolant can enter the first cooling passage 111 from the first water pipe 13 and then flow out from the second water pipe 14 through the first communication passage 311, the annular chamber 211, the inner chamber 212, the second communication passage 321, and the second cooling passage 121. .

It can be understood by those skilled in the art that the cooling passages (111, 121) on the casing 1 are communicated with the third cooling passages 21 on the rotating shaft 2 through the first connecting beam 31 and the second connecting beam 32, so that the motor only It is necessary to provide an inlet pipe and an outlet pipe (the first water pipe 13 and the second water pipe 14) to ensure that the casing 1 and the rotating shaft 2 can be simultaneously cooled, thereby being compared with the prior art motor cooling system (collection of cooling components) ) reduced complexity. At the same time, the cooling liquid can be recooled to the casing 1 by the first cooling passage 111 and the second cooling passage 121 provided on the casing 1, thereby improving the cooling efficiency of the motor with respect to the prior art.

Heretofore, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the drawings, but it is obvious to those skilled in the art that the scope of the present invention is obviously not limited to the specific embodiments. Those skilled in the art can make equivalent changes or substitutions to the related technical features without departing from the principles of the present invention, and the technical solutions after the modifications or replacements fall within the scope of the present invention.

Claims

An electric motor cooling system, comprising: a casing, an end cover, a stator, a rotor and a rotating shaft, wherein the casing is provided with a first nozzle and a second nozzle, wherein the motor cooling system comprises a setting a first cooling passage and a second cooling passage between the first nozzle and the second nozzle,

Wherein the first cooling passage is disposed on the casing, and two ends of the first cooling passage are respectively connectable with the first nozzle and the second nozzle;

Wherein the second cooling channel comprises:

a first passage, which is disposed in the casing, and one end of the first passage can communicate with the first nozzle;

a second passage disposed within the shaft; and

a communication passage disposed at an end of the motor, the communication passage for communicating the other end of the first passage with one end of the second passage, and the other end of the second passage The second nozzle is connected.
The motor cooling system according to claim 1, wherein said motor cooling system further comprises a communication member, said communication member being disposed at an end of said motor, said communication passage being disposed in said communication member.
The motor cooling system of claim 2 wherein said communication member is a flow splitter.
The motor cooling system of claim 1 wherein the second passage comprises:

a shaft hole disposed in the rotating shaft;

a rotor water pipe disposed in the shaft hole and communicating with the shaft hole;

Wherein one end of the rotor water pipe is fixed to an end of the motor.
The motor cooling system according to claim 4, wherein said communication passage includes a first communication passage and a second communication passage,

Wherein the first communication channel is configured to communicate the first channel and the shaft hole, The second communication passage is configured to communicate the rotor water pipe and the second water nozzle.
The motor cooling system according to any one of claims 1 to 5, wherein a partition is disposed in a casing of the motor, and the first cooling passage and the first passage pass through the partition Separated.
The motor cooling system according to claim 6, wherein said partition is integrally formed with said casing.
The motor cooling system according to claim 6 or 7, wherein the partition plate is provided with a communication hole at a position corresponding to the first nozzle and the second nozzle, respectively, and two of the first cooling passages The end communicates with the first nozzle and the second nozzle respectively through the communication hole.
The motor cooling system according to any one of claims 1 to 5, wherein the first cooling passage is spiral or S-shaped in the axial direction of the motor, and the first passage is along the axial direction of the motor. Spiral or S type.
The motor cooling system according to any one of claims 1 to 5, wherein the first cooling passage and the second cooling passage are parallel cooling passages.
An electric motor cooling system, comprising: a casing, an end cover, a stator, a rotor and a rotating shaft, wherein the casing is provided with a first nozzle and a second nozzle, wherein the cooling system comprises:

a first cooling passage disposed on the casing, one end of the first cooling passage being connectable to the first nozzle;

a second cooling passage disposed on the casing, one end of the second cooling passage being connectable to the second nozzle;

a third cooling passage disposed in the rotating shaft;

a communication passage disposed at an end of the motor, the communication passage for communicating the other end of the first cooling passage with one end of the third cooling passage, and the other of the second cooling passage One end is in communication with the other end of the third cooling passage.
The motor cooling system according to claim 11, wherein said cooling system further comprises a communication member, said communication member being disposed at an end of said motor, said communication passage being disposed in said communication member.
The motor cooling system of claim 12 wherein said communication member is a flow splitter.
The motor cooling system of claim 11 wherein said third cooling passage comprises:

a shaft hole disposed in the rotating shaft;

a rotor water pipe disposed in the shaft hole and communicating with the shaft hole;

Wherein one end of the rotor water pipe is fixed to an end of the motor.
The motor cooling system according to claim 14, wherein said communication passage includes a first communication passage and a second communication passage.

The first communication passage is configured to communicate the first cooling passage and the rotating shaft hole, and the second communication passage is configured to communicate the rotor water pipe and the second cooling passage.
The motor cooling system according to claim 15, wherein a first water pipe and a second water pipe are disposed on the motor corresponding to the first nozzle and the second nozzle, and the first water pipe The first water nozzle is only in communication with the first cooling passage, and the second water pipe is only in communication with the second cooling passage through the second nozzle.
The motor cooling system according to any one of claims 11 to 16, wherein the casing comprises a first casing and a second casing, and the first cooling passage and the second cooling passage are respectively Provided in the first casing and the second casing.
The motor cooling system according to any one of claims 11 to 16, wherein the casing comprises a first casing and a second casing, and the first casing and the second casing A partition is disposed therebetween, and the first cooling passage and the second cooling passage are respectively disposed on the first casing and the second casing.
The motor cooling system according to any one of claims 11 to 16, wherein the first cooling passage is spiral or S-shaped in the axial direction of the motor, and the second cooling passage is along the axial direction of the motor. Spiral or S-shaped.
The motor cooling system according to any one of claims 11 to 16, wherein the first cooling passage and the second cooling passage and the third cooling passage form a series cooling passage through the communication passage.