Cooling device, motor, cooling system and vehicle

Abstract

The invention discloses a cooling device, a motor and a vehicle. The cooling device is used for the motor, the motor is provided with a bearing, and the cooling device comprises a cooling shell and a movable component. The cooling shell is provided with a through hole which faces the bearing; the movable component is provided with a blocking part, the movable component is movably connected to the cooling shell between a first position and a second position, when the movable component is located at the first position, the blocking part can block part of the through hole, and when the movable component is located at the second position, the blocking part leaves the through hole. Thus, the movable component moves between the first position and the second position, namely the total area of the cross sections of all the through holes facing the bearing can be adjusted, and therefore the flow rate of the cooling medium directly blowing the bearing is adjusted.

Description

Technical Field

[0001] This application relates to the field of electric motors, and more specifically to cooling devices, electric motors, cooling systems, and vehicles. Background Technology

[0002] The electric motor in existing vehicles includes a stator assembly, bearings, and a housing. The stator assembly is connected to the housing via bearings. The motor is equipped with an air-cooling system. The air-cooling system is used to blow air onto the bearings to cool them down.

[0003] The airflow from the air-cooling unit to the bearing is not adjustable.

[0004] Therefore, this application provides a cooling device, an electric motor, a cooling system, and a vehicle to at least partially solve the above-mentioned problems. Summary of the Invention

[0005] The summary section introduces a series of simplified concepts, which will be further explained in detail in the detailed embodiments section. This summary section is not intended to limit the key features and essential technical features of the claimed technical solutions, nor is it intended to determine the scope of protection of the claimed technical solutions.

[0006] To at least partially solve the above-mentioned technical problems, this application provides a cooling device for an electric motor having bearings, the cooling device comprising:

[0007] Cooling shell, the cooling shell has through holes facing the bearing;

[0008] A movable member having a sealing portion is movably connected to a cooling shell between a first position and a second position. When the movable member is in the first position, the sealing portion can block at least part of the through hole, and when the movable member is in the second position, the sealing portion leaves the through hole.

[0009] According to the cooling device of this application, by moving the movable member between a first position and a second position, the total cross-sectional area of ​​all through holes facing the bearing can be adjusted, thereby adjusting the flow rate of the cooling medium blowing directly onto the bearing.

[0010] Optionally, the movable member is movably disposed along the axial direction of the through hole, and / or

[0011] The movable component is rotatably arranged about its axis.

[0012] Optionally, the cooling device further includes:

[0013] A driving component is connected to a movable component to drive the movable component to move.

[0014] Optionally, the cooling housing has a cooling cavity communicating with the through hole.

[0015] The sealing part is located inside the cooling chamber, or

[0016] The sealing part is located outside the cooling cavity.

[0017] Optionally, there are at least two through holes, and when the movable member is in the first position, the sealing part seals at least one through hole.

[0018] Optionally, the movable component includes:

[0019] Move the lever;

[0020] The connecting part has its length direction parallel to the radial direction of the moving rod. The connecting part is connected to one end of the moving rod, and the free end of the connecting part is connected to the sealing part.

[0021] Optionally, the connecting portion includes a first connecting portion and a second connecting portion, wherein the length direction of the first connecting portion and the length direction of the second connecting portion intersect.

[0022] Optionally, when the motor speed is less than or equal to a preset speed, the movable component is in the first position; when the motor speed is greater than the preset speed, the movable component is in the second position, or...

[0023] The temperature of the motor is collected. When the motor temperature is less than or equal to the preset temperature, the movable component is in the first position. When the motor temperature is greater than the preset temperature, the movable component is in the second position.

[0024] Optionally, the cooling device also includes a nozzle having a nozzle channel and a nozzle hole communicating with the nozzle channel. One end of the nozzle is connected to the cooling housing so that the nozzle hole at one end of the nozzle channel communicates with the through hole, and the nozzle hole at the other end of the nozzle channel faces the bearing.

[0025] Optionally, the nozzle channel is constructed with a constricted structure along the extension direction of the axis of the nozzle channel.

[0026] Optionally, the axial direction of the through hole is parallel to the axial direction of the bearing.

[0027] This application also provides an electric motor, which includes the aforementioned cooling device.

[0028] According to the present application, the motor includes the aforementioned cooling device, which allows the movable member to move between a first position and a second position, thereby adjusting the total cross-sectional area of ​​all through holes facing the bearing, and thus adjusting the flow rate of the cooling medium blowing directly onto the bearing.

[0029] Optionally, the motor also includes:

[0030] The motor end cover has a cooling air duct, which is connected to a through hole.

[0031] Optionally, the motor end cover also has a discharge port that connects the internal space of the motor to the outside of the motor.

[0032] This application also provides a cooling system, the cooling system comprising:

[0033] The aforementioned motor;

[0034] compressor;

[0035] The vortex tube has its inlet connected to the compressor and its cooling outlet connected to the through hole to supply cool air.

[0036] According to the cooling system of this application, the cooling system includes the aforementioned motor, the motor including the aforementioned cooling device, which moves the movable member between a first position and a second position, thereby adjusting the total cross-sectional area of ​​all through holes facing the bearing, thereby adjusting the flow rate of the cooling medium blowing directly onto the bearing.

[0037] This application also provides a vehicle that includes the aforementioned electric motor or the aforementioned cooling system.

[0038] According to the vehicle of this application, the vehicle includes the aforementioned motor or the aforementioned cooling system, such that the movable member can be moved between a first position and a second position to adjust the total cross-sectional area of ​​all through holes toward the bearing, thereby adjusting the flow rate of the cooling medium blowing directly onto the bearing. Attached Figure Description

[0039] To make the advantages of this application more readily apparent, the application briefly described above will be described in more detail with reference to the specific embodiments shown in the accompanying drawings. It is to be understood that these drawings depict only typical embodiments of this application and should not be considered as limiting its scope of protection. The application is described and explained with additional features and details through the drawings.

[0040] Figure 1 This is a perspective view of a cooling device, motor end cover, bearing and stator assembly connected together according to a preferred embodiment of this application;

[0041] Figure 2 for Figure 1 An exploded view showing the cooling device, motor end cover, bearings, and stator assembly connected together.

[0042] Figure 3 for Figure 1 An exploded view of the cooling device, showing the drive components, moving parts, cooling shell, and nozzle connected together.

[0043] Figure 4 for Figure 1 A sectional view of a perspective view showing the cooling device, motor end cover, bearings, and stator assembly connected together.

[0044] Figure 5 for Figure 1 A cross-sectional view showing the connection between the cooling device, motor end cover, bearings, and stator assembly.

[0045] Figure 6 for Figure 4 A partially enlarged schematic diagram of point A where the cooling device, motor end cover, bearing, and stator assembly are connected together;

[0046] Figure 7 for Figure 1 A front view schematic diagram of the nozzle of the cooling device; and

[0047] Figure 8 for Figure 1 Another three-dimensional diagram showing the cooling device, motor end cover, bearings, and stator assembly connected together.

[0048] Explanation of reference numerals in the attached figures

[0049] 110: Bearing; 120: Cooling housing

[0050] 121: Cooling chamber; 122: Through hole

[0051] 123: Shell mounting hole; 130: Movable component

[0052] 131: Moving rod; 132: Connecting part

[0053] 133: Sealing part; 134: First connecting part

[0054] 135: Second connecting part; 140: Driving component

[0055] 150: Nozzle 151: Nozzle Channel

[0056] 152: Nozzle hole 153: First section

[0057] 154: Middle section 155: Second section

[0058] 160: Compressor; 170: Swirl tube

[0059] 171: Inlet 172: Cooling Outlet

[0060] 180: Motor end cover; 181: Cooling air duct

[0061] 182: Bearing mounting hole; 183: Discharge hole

[0062] 190: Stator assembly Detailed Implementation

[0063] In the following description, numerous specific details are set forth to provide a more thorough understanding of this application. However, it will be apparent to those skilled in the art that embodiments of this application may be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described to avoid confusion with embodiments of this application.

[0064] The preferred embodiments of this application will now be described with reference to the accompanying drawings. It should be noted that the terms "upper," "lower," and similar expressions used herein are for illustrative purposes only and are not intended to be limiting.

[0065] In this document, ordinal numbers such as “first” and “second” used in this application are merely identifiers and do not have any other meaning, such as a specific order.

[0066] To fully understand the embodiments of this application, a detailed structure will be presented in the following description. Obviously, the implementation of the embodiments of this application is not limited to the specific details familiar to those skilled in the art. Preferred embodiments of this application are described in detail below; however, other embodiments may be available in addition to these detailed descriptions.

[0067] This application provides a cooling device. The cooling device can be used in an electric motor. The cooling device is capable of controlling the airflow rate of the bearing 110 of the direct-blowing motor.

[0068] Please refer to Figures 1 to 8 The cooling device includes a cooling shell 120. The cooling shell 120 can be a generally cylindrical structure. The cooling shell 120 has a cylindrical cooling cavity 121 and a through hole 122 located on the end face of one end of the cooling shell 120. The axial direction of the through hole 122, the axial direction of the cooling cavity 121, and the axial direction of the cooling shell 120 are parallel. The through hole 122 communicates with the cooling cavity 121. All through holes 122 of the cooling shell 120 face the bearing 110.

[0069] In this way, gas (an example of a cooling medium) is introduced into the cooling chamber 121. The gas can be blown directly onto the bearing 110 through the through-hole 122 to cool the bearing 110.

[0070] It is understood that, in embodiments not shown, cooling oil (another example of a cooling medium) may also be introduced into the cooling chamber to cool the bearing.

[0071] like Figures 2 to 6As shown, the cooling device also includes a movable member 130. The movable member 130 is movably connected to the cooling housing 120. Thus, the movable member 130 can move between a first position and a second position. The movable member 130 has a sealing portion 133. When the movable member 130 is in the first position, the sealing portion 133 blocks a portion of the through-hole 122. At this time, the sum of the cross-sectional areas of all the through-holes 122 included in the cooling housing 120 (the total cross-sectional area of ​​all through-holes 122) can be reduced. When the movable member 130 is in the second position, the sealing portion 133 leaves the through-hole 122.

[0072] In this embodiment, by moving the movable member 130 between the first position and the second position, the total cross-sectional area of ​​all the through holes 122 facing the bearing 110 can be adjusted. Thus, at different motor speeds, by placing the movable member 130 in the first position or the second position, the flow rate and velocity of the gas blowing directly onto the bearing 110 can be adjusted, thereby matching the flow rate and velocity of the gas blowing directly onto the bearing 110 with the motor speed, preventing the compressor from running at high power continuously and reducing energy consumption.

[0073] Preferably, such as Figure 6 As shown, the movable member 130 is movably arranged along the axial direction of the through hole 122. Therefore, the cooling device has a simple structure.

[0074] Preferably, please continue to refer to Figure 3 and Figure 6 The cooling shell 120 has a shell mounting hole 123 at the end away from the through hole 122. The movable member 130 also includes a moving rod 131 and a connecting portion 132. The length direction of the moving rod 131 is parallel to the axial direction of the through hole 122. The moving rod 131 is movably inserted through the shell mounting hole 123 along the axial direction of the through hole 122. The connecting portion 132 is a rod-shaped structure. The length direction of the connecting portion 132 is parallel to the radial direction of the moving rod 131. The connecting portion 132 is connected to one end of the moving rod 131. The free end of the connecting portion 132 is connected to the sealing portion 133. Both the connecting portion 132 and the sealing portion 133 are located within the cooling chamber 121. Thus, the structure of the cooling device is simple. The free end of the connecting portion 132 is the end of the connecting portion 132 that is not connected to the moving rod 131.

[0075] In another embodiment, not shown, the cooling housing may not have a cooling cavity. In this case, the cooling housing is a plate-shaped structure with a through-hole facing the bearing. The bearing mounting hole (described later) and the plate-shaped cooling housing then form a cavity communicating with the through-hole, allowing gas to flow directly through this cavity and the through-hole to the bearing.

[0076] More preferably, the connecting portion 132 includes a first connecting portion 134 and a second connecting portion 135. The length direction of the first connecting portion 134 intersects the length direction of the second connecting portion 135. Thus, the first connecting portion 134 and the second connecting portion 135 form an X-shaped structure. Consequently, the structure of the moving rod 131 is simple.

[0077] like Figure 3 As shown, there are at least two through holes 122 and at least two sealing portions 133. Each of the at least two sealing portions 133 corresponds to a portion of the through hole 122. In a projection plane perpendicular to the axial direction of the through hole 122, the projection of the sealing portion 133 overlaps the projection of the corresponding through hole 122. Thus, when the movable member 130 is in the first position, the sealing portion 133 seals the corresponding through hole 122. Therefore, the structure of the cooling device is simple.

[0078] It is understood that, in embodiments not shown, the sealing part 133 can seal the portion of the corresponding through hole, as long as the flow rate of the gas blowing into the bearing can be adjusted.

[0079] Please continue to refer to this. Figure 3 The cooling device also includes a drive member 140. The drive member 140 can be a servo motor. The drive member 140 is located outside the cooling housing 120. The output shaft of the drive member 140 is threaded to the end of the moving rod 131 away from the connecting portion 132. Rotation of the drive member 140 enables the moving rod 131 to move axially along the through hole 122.

[0080] It should be noted that the cooling device also includes a first guide portion (not shown) and a second guide portion (not shown). One of the first guide portion and the second guide portion is disposed on the movable member 130. The other is disposed on the motor end cover 180 or the cooling shell 120. The first guide portion and the second guide portion cooperate to limit the movable member 130 to rotate about its axis (that is, the axis of the shell mounting hole 123), so that the movable member 130 can only move along its axis.

[0081] For example, the first guide portion is a spline provided on the outer surface of the moving rod 131. The second guide portion is a spline hole provided in the motor end cover 180. The spline passes through the spline hole to limit the rotation of the movable member 130 about its axis, so that the movable member 130 can only move along its axis.

[0082] It is understood that, in the embodiment not shown, the output shaft of the servo motor is provided with a first guide portion. The first guide portion and the second guide portion cooperate. The output shaft of the servo motor is connected to one end of the connecting portion. Thus, when the output shaft rotates, the servo motor moves along the axial direction of the output shaft (that is, the axial direction of the through hole), thereby driving the connecting portion to move along the axial direction of the output shaft. At the same time, the servo motor drives the connecting portion to rotate about the axis of the movable member 130.

[0083] In embodiments not shown, a linear drive component such as a cylinder, hydraulic cylinder, or a rack and pinion structure can be connected to the moving rod, thereby driving the moving rod to rotate along the axis of the movable component.

[0084] It is understood that, in embodiments not shown, the output shaft of the drive member is connected to the moving rod to drive the moving rod to rotate, thereby allowing the movable member to be rotatably arranged about its axis. In this case, both the connecting part and the sealing part can be located within the cooling chamber.

[0085] In another embodiment (not shown), the output shaft of the drive member is connected to a movable rod to rotate the rod, thereby rotatably arranging the movable member about its axis. In this case, both the connecting portion and the sealing portion can be located outside the cooling chamber. Specifically, the end face of the through hole of the cooling shell has a mounting opening spaced apart from the through hole. The mounting opening and the shell mounting hole are coaxially arranged. The movable rod passes through the mounting opening and extends to the side of the cooling shell away from the shell mounting hole. Thus, the connecting portion and the sealing portion are located outside the cooling chamber.

[0086] The cooling device also includes a controller (not shown). The controller is electrically connected to the drive member 140. When the motor speed is less than or equal to a preset speed, the controller controls the drive member 140 to operate, driving the movable member 130 to move to a first position and maintain it in the first position. Therefore, when the motor speed is less than or equal to the preset speed, the motor power is low, and the temperature of the bearing 110 is low. At this time, the movable member 130 can be positioned in the first position, reducing the flow rate of gas directly blowing onto the bearing 110, thereby reducing the energy consumption of the compressor.

[0087] When the motor speed exceeds the preset speed, the controller controls the drive component 140 to operate, driving the movable component 130 to move to the second position and maintain it in the second position. Therefore, when the motor speed exceeds the preset speed, the motor power is high, and the temperature of the bearing 110 is high. At this time, the movable component 130 can be positioned in the second position, increasing the airflow of the gas directly blowing onto the bearing 110.

[0088] It is understood that, in embodiments not shown, the temperature of the motor can be collected. When the motor temperature is less than or equal to a preset temperature, the movable component is located in the first position. When the motor temperature is greater than the preset temperature, the movable component is located in the second position.

[0089] Specifically, when the motor temperature is less than or equal to a preset temperature, the controller controls the drive component to operate, driving the movable component to move to a first position and maintain it in that position. Therefore, when the motor temperature is less than or equal to the preset temperature, the motor power is low, and the bearing temperature is low. At this time, the movable component can be positioned in the first position, reducing the flow of gas directly blowing onto the bearing, thereby reducing the compressor's energy consumption.

[0090] When the motor temperature exceeds the preset temperature, the controller activates the drive component to move the movable component to a second position and maintain it there. Therefore, when the motor temperature is higher than the preset temperature, the motor power is higher, and the bearing temperature is also higher. At this point, the movable component can be positioned in the second position, increasing the airflow directly towards the bearing.

[0091] like Figure 3 , Figure 6 and Figure 7 As shown, the cooling device also includes a nozzle 150. The nozzle 150 has a nozzle channel 151 and nozzle holes 152 communicating with the nozzle channel 151. There are two nozzle holes 152. Along the axial direction of the nozzle channel 151, one nozzle hole 152 communicates to one end of the nozzle channel 151, and the other nozzle hole 152 communicates to the other end of the nozzle channel 151. One end of the nozzle 150 is connected to the cooling housing 120, so that one nozzle hole 152 communicates with the through hole 122. The other nozzle hole 152 faces the bearing 110. Therefore, the nozzle 150 can directly blow air onto the bearing 110, enabling more efficient direct blowing onto the bearing 110.

[0092] Preferably, such as Figure 6 As shown, the nozzle channel 151 has a first section 153, a middle section 154, and a second section 155. The first section 153, the middle section 154, and the second section 155 are arranged sequentially along the axial direction of the nozzle channel 151. The first section 153 has a nozzle hole 152. The first section 153 connects to a through hole 122. One end of the middle section 154 is connected to the first section 153, and the other end of the middle section 154 is connected to the second section 155. The second section 155 has another nozzle hole 152. The inner diameters of both the first section 153 and the second section 155 are larger than the inner diameter of the middle section 154. Thus, along the axial direction of the nozzle channel 151, the nozzle channel 151 is constructed with a constricted waist structure. Therefore, the middle section 154 can increase the gas flow rate.

[0093] Furthermore, such as Figure 6 and Figure 7 As shown, there are multiple nozzle holes 152 located in the second section 155. This allows for a further increase in the flow rate of the gas blowing into the direct-blowing bearing 110.

[0094] like Figure 6 As shown, the axial direction of the through hole 122 is parallel to the axial direction of the bearing 110. This allows for more effective cooling of the bearing 110.

[0095] Please refer to Figures 1 to 5 The cooling device also includes a compressor 160 and a vortex tube 170. The compressor 160 outputs high-pressure gas. When compressed air is input into the vortex tube 170, it is converted by the vortex tube 170, allowing it to output high-temperature gas and low-temperature gas from different ports. Specifically, the vortex tube 170 has an inlet 171 and a cooling outlet 172. The inlet 171 of the vortex tube 170 is connected to the compressor 160 via a pipe. The cooling outlet 172 of the vortex tube 170 is used to output low-temperature gas. The cooling outlet 172 of the vortex tube 170 is connected to the cooling duct 181 (described later) via a pipe, and further connected to the cooling chamber 121 via the cooling duct 181, supplying cool air to the cooling chamber 121. Thus, the cool air can be directly blown onto the bearing 110, allowing for more effective cooling of the bearing 110.

[0096] Preferably, the cooling device further includes a motor end cover 180. A moving rod 131 passes through the motor end cover 180. Both the eddy current tube 170 and the cooling shell 120 are connected to the motor end cover 180. The motor end cover 180 has a cooling air duct 181. The cooling air duct 181 connects to the cooling outlet 172 and the shell mounting hole 123. Thus, the motor employing the cooling device has a compact structure. More preferably, as... Figure 2 As shown, the motor end cover 180 has a bearing mounting hole 182. The moving rod 131 passes through the bearing mounting hole 182. The cooling shell 120 and the bearing 110 are both disposed within the bearing mounting hole 182. As a result, the structure of the motor using the cooling device is more compact.

[0097] Please refer to Figure 1 , Figures 4 to 6 When the compressor is operating, the gas produced by the compressor is input into the vortex tube 170 through inlet 171. The vortex tube 170 outputs cryogenic gas from the cooling outlet 172. The cryogenic gas enters the cooling chamber 121 through the cooling air duct 181 of the motor end cover 180 and the housing mounting hole 123, then enters the nozzle channel 151 through the through hole 122, and then blows directly onto the bearing 110 from the nozzle hole 152 away from the through hole 122. Figure 1 , Figures 4 to 6 As shown by the dashed arrow.

[0098] like Figure 8As shown, the motor end cover 180 also has a discharge port 183 and a discharge channel (not shown). The discharge port 183 communicates with the outside of the motor through the discharge channel. The motor has a housing (not shown). The housing is connected to the motor end cover 180 to enclose the internal space of the motor. The motor includes a stator assembly 190. The stator assembly 190 is connected to the motor end cover 180 via a bearing 110. The stator assembly 190 is located within the internal space of the motor. The discharge port 183 communicates with the internal space of the motor. In this way, gas blowing directly onto the bearing 110 can flow through the stator assembly 190 and then be discharged from the internal space of the motor via the discharge port 183. At this time, the gas flow direction is as follows: Figure 8 As indicated by the dashed arrow. This allows for cooling of the stator assembly 190.

[0099] This application also provides an electric motor. The electric motor includes the aforementioned cooling device.

[0100] In this embodiment, the motor includes the aforementioned cooling device. By moving the movable member 130 between a first position and a second position, the total cross-sectional area of ​​all through holes 122 facing the bearing 110 can be adjusted. Thus, at different motor speeds, by positioning the movable member 130 in the first or second position, the flow rate and velocity of the gas directly blowing onto the bearing 110 can be adjusted, thereby matching the flow rate and velocity of the gas directly blowing onto the bearing 110 with the motor speed. This prevents the compressor from continuously operating at high power, reducing energy consumption.

[0101] This application also provides a cooling system. The cooling system includes the aforementioned motor.

[0102] In this embodiment, the cooling system includes the aforementioned motor, which in turn includes the aforementioned cooling device. By moving the movable member 130 between a first position and a second position, the total cross-sectional area of ​​all through holes 122 facing the bearing 110 can be adjusted. Thus, by positioning the movable member 130 at the first or second position at different motor speeds, the flow rate and velocity of the gas directly blowing onto the bearing 110 can be adjusted, thereby matching the flow rate and velocity of the gas directly blowing onto the bearing 110 with the motor speed. This prevents the compressor from continuously operating at high power, reducing energy consumption.

[0103] This application also provides a vehicle. The vehicle includes the aforementioned electric motor or the aforementioned cooling system.

[0104] In this embodiment, by moving the movable member 130 between a first position and a second position, the total cross-sectional area of ​​all through holes 122 facing the bearing 110 can be adjusted. Thus, at different motor speeds, by positioning the movable member 130 in either the first or second position, the flow rate and velocity of the gas directly blowing onto the bearing 110 can be adjusted, thereby matching the flow rate and velocity of the gas directly blowing onto the bearing 110 with the motor speed. This prevents the compressor from continuously operating at high power, reducing energy consumption. This application has been described through the above embodiments, but it should be understood that the above embodiments are for illustrative purposes only and are not intended to limit this application to the described embodiments. Furthermore, those skilled in the art will understand that this application is not limited to the above embodiments, and many more variations and modifications can be made based on the teachings of this application, all of which fall within the scope of protection claimed in this application. The scope of protection of this application is defined by the appended claims and their equivalents.

[0105] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for descriptive purposes only and is not intended to limit the scope of this application. Terms such as “component” as used herein may refer to a single part or a combination of multiple parts. Terms such as “installation” or “installation” as used herein may refer to a component being directly attached to another component or a component being attached to another component via an intermediary. A feature described in one embodiment herein may be applied, alone or in combination with other features, to another embodiment, unless that feature is not applicable in that other embodiment or is otherwise stated.

Claims

1. A cooling device, characterized in that, The cooling device is used for a motor, the motor having bearings, and the cooling device includes: A cooling housing having a through hole facing the bearing; A movable member having a sealing portion is movably connected to the cooling shell between a first position and a second position. When the movable member is in the first position, the sealing portion is capable of sealing at least part of the through hole. When the movable member is in the second position, the sealing portion leaves the through hole.

2. The cooling device according to claim 1, characterized in that, The movable member is movably disposed along the axial direction of the through hole, and / or The movable member is rotatably arranged about its axis.

3. The cooling device according to claim 2, characterized in that, The cooling device also includes: A driving member is connected to the movable member to drive the movable member to move.

4. The cooling device according to claim 1, characterized in that, The cooling shell has a cooling cavity communicating with the through hole. The sealing part is located inside the cooling cavity, or The sealing part is located outside the cooling cavity.

5. The cooling device according to claim 1, characterized in that, The number of through holes is at least two, and when the movable member is in the first position, the sealing part blocks at least one of the through holes.

6. The cooling device according to claim 1, characterized in that, The movable component includes: Move the lever; A connecting part, the length direction of which is parallel to the radial direction of the moving rod, the connecting part being connected to one end of the moving rod, and the free end of the connecting part being connected to the sealing part.

7. The cooling device according to claim 6, characterized in that, The connecting portion includes a first connecting portion and a second connecting portion, wherein the length direction of the first connecting portion and the length direction of the second connecting portion intersect.

8. The cooling device according to claim 1, characterized in that, When the motor's rotational speed is less than or equal to a preset rotational speed, the movable component is located in the first position; when the motor's rotational speed is greater than the preset rotational speed, the movable component is located in the second position, or... The temperature of the motor is collected. If the temperature of the motor is less than or equal to a preset temperature, the movable component is located in the first position. If the temperature of the motor is greater than the preset temperature, the movable component is located in the second position.

9. The cooling device according to claim 1, characterized in that, The cooling device further includes a nozzle having a nozzle channel and a nozzle hole communicating with the nozzle channel. One end of the nozzle is connected to the cooling housing so that the nozzle hole at one end of the nozzle channel communicates with the through hole, and the nozzle hole at the other end of the nozzle channel faces the bearing.

10. The cooling device according to claim 9, characterized in that, Along the extension direction of the axis of the nozzle channel, the nozzle channel is constructed as a constricted structure.

11. The cooling device according to claim 1, characterized in that, The axial direction of the through hole is parallel to the axial direction of the bearing.

12. An electric motor, characterized in that, The motor includes a cooling device according to any one of claims 1 to 11.

13. The motor according to claim 12, characterized in that, The motor also includes: The motor end cover has a cooling air duct that connects to the through hole.

14. The motor according to claim 13, characterized in that, The motor end cover also has a discharge hole that connects the internal space of the motor to the outside of the motor.

15. A cooling system, characterized in that, The cooling system includes: The motor according to any one of claims 12 to 14; compressor; A vortex tube, the inlet of which is connected to the compressor, and the cooling outlet of which is connected to the through hole, so as to supply cold air to the through hole.

16. A vehicle, characterized in that, The vehicle includes an electric motor according to any one of claims 12 to 14, or a cooling system according to claim 15.

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