Sealed cooling system, motor and transport vehicle

Abstract

The invention discloses a sealing cooling system, a stator structure, a motor and a transportation carrier, the sealing cooling system comprises a shell assembly, a sealing assembly and a limiting assembly, the shell assembly comprises an inner shell and an outer shell, the inner shell is provided with a through hole, and the through hole penetrates through two opposite ends of the inner shell. The outer shell is arranged on the periphery of the inner shell in a surrounding mode, the outer shell and the inner shell are arranged in a spaced mode, the outer shell and the inner shell define a cooling liquid cavity, the cooling liquid cavity is used for arranging a stator module, the shell assembly is provided with a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are arranged in a spaced mode and communicate with the cooling liquid cavity. The sealing assembly is arranged between the outer shell and the inner shell so that the outer shell and the inner shell can be connected in a sealed mode. The limiting assembly is arranged in the inner shell and matched with the outer shell to limit the outer shell to move relative to the inner shell. The inner shell and the outer shell of the sealed cooling system provided by the invention are kept relatively static, the cooling liquid cavity is kept in a sealed state, and meanwhile, the cooling effect of the sealed cooling system on the stator module is ensured.

Description

Technical Field

[0001] The present application relates to the technical field of motor cooling, and more specifically, to a sealed cooling system, a motor and a transport vehicle. Background Art

[0002] As a driving structure, the motor will generate a lot of heat when working, and the motor needs to be cooled to avoid overheating and internal short circuit of the motor, thereby shortening the service life of the motor. The current motor uses the method of immersing the stator module in the motor in coolant to quickly reduce the temperature inside the motor. Generally, a sealed coolant cavity is formed through the motor casing. The coolant is continuously introduced into the cooling liquid cavity and fully contacts with the stator module for efficient heat exchange, and then discharged from the cooling liquid cavity.

[0003] However, the shell assembly structure of the existing motor is unstable. The hydraulic strength in the coolant cavity formed by the shell will cause the outer shell of the shell assembly to shift, thereby destroying the sealing conditions of the coolant cavity, causing coolant leakage, reducing the cooling effect, and polluting the motor working environment, which is easy to cause circuit failure. Summary of the invention

[0004] Embodiments of the present application provide a sealed cooling system, a motor, and a transport vehicle.

[0005] According to the first aspect of the present application, an embodiment of the present application provides a sealed cooling system, which is used to install a stator module. The sealed cooling system includes a shell assembly, a sealing assembly and a limit assembly. The shell assembly includes an inner shell and an outer shell. The inner shell is provided with a through hole, and the through hole passes through the opposite ends of the inner shell; the outer shell is arranged around the outer periphery of the inner shell and is spaced apart from the inner shell. The outer shell and the inner shell define a cooling liquid cavity, and the cooling liquid cavity is used to set the stator module. The shell assembly is provided with a cooling liquid inlet and a cooling liquid outlet, and the cooling liquid inlet and the cooling liquid outlet are spaced apart and are both connected to the cooling liquid cavity; the sealing assembly is arranged between the outer shell and the inner shell to make the outer shell and the inner shell sealed and connected; the limit assembly is arranged on the inner shell, and the limit assembly cooperates with the outer shell to limit the movement of the outer shell relative to the inner shell.

[0006] According to the second aspect of the present application, an embodiment of the present application further provides a stator structure, including a sealed cooling system and a stator module, the sealed cooling system has a cooling liquid cavity, and the stator module is arranged in the cooling liquid cavity.

[0007] According to the third aspect of the present application, an embodiment of the present application further provides a motor, comprising a stator structure and a rotor module, wherein the rotor module and the stator structure are rotatably matched.

[0008] According to the fourth aspect of the present application, an embodiment of the present application further provides a transport vehicle, comprising a body and a motor, wherein the motor is installed in the body.

[0009] The embodiments of the present application provide a sealed cooling system, a motor and a transport vehicle, wherein a limit assembly is provided on the cooling liquid cavity of the sealed cooling system to protect the sealing condition of the cooling liquid cavity. Specifically, the cooling liquid cavity is defined by an inner shell and an outer shell, and the sealing assembly is provided between the inner shell and the outer shell and is sealedly connected to the inner shell and the outer shell so that the cooling liquid cavity reaches a sealed condition. The limit assembly is provided on the inner shell and cooperates with the outer shell to limit the movement of the outer shell relative to the inner shell so that the inner shell and the outer shell remain relatively still. The sealed connection relationship between the sealing assembly and the inner shell and the outer shell will not be destroyed, the cooling liquid cavity will remain sealed, and coolant leakage will not occur, while ensuring the cooling effect of the sealed cooling system on the stator module. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 This is a schematic diagram of the first structure of the transport vehicle provided in an embodiment of the present application.

[0012] Figure 2 This is a first structural schematic diagram of the motor provided in an embodiment of the present application.

[0013] Figure 3 This is a schematic diagram of the first structure of the stator structure provided in the embodiment of the present application.

[0014] Figure 4 This is a first structural schematic diagram of the sealed cooling system provided in an embodiment of the present application.

[0015] Figure 5 yes Figure 4 A schematic structural diagram of a first type of housing assembly of a sealed cooling system is shown.

[0016] Figure 6 yes Figure 4 A partial enlarged view of point A of the sealed cooling system is shown.

[0017] Figure 7 yes Figure 4 A first structural schematic diagram of a first limiter of a sealed cooling system is shown.

[0018] Figure 8 yes Figure 4 A partial enlarged view of point B of the sealed cooling system is shown.

[0019] Fig. 9 yes Figure 4A structural schematic diagram of the local structure of the sealed cooling system shown.

[0020] Fig.10 yes Figure 3 A first structural schematic diagram of a stator module of a stator structure is shown.

[0021] Fig.11 yes Figure 6 A partial enlarged view of A1 of the structure shown.

[0022] Fig.12 yes Figure 3 A schematic diagram of the first structure at C of the stator structure is shown.

[0023] Fig.13 yes Figure 3 A second structural schematic diagram of the stator structure at C is shown. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application.

[0025] See also Figure 1 , the embodiment of the present application provides a transport vehicle 1000, which includes but is not limited to a car, SUV, van and other transportation vehicles for carrying people or goods. The transport vehicle 1000 includes a body 300, a travel system and a motor 500, etc. The body 300 is formed with a compartment 320 for users to ride or to accommodate goods. The motor 500 is generally arranged in the accommodation space at the bottom of the body 300, and forms a driving connection relationship with the travel system of the transport vehicle 1000. In some embodiments, the transport vehicle 1000 can also be a flying car, and its travel system can include a rotor, which is connected to the rotation output end of the motor 500 to rotate under the drive of the motor 500, thereby providing the transport vehicle 1000 with power for flying. In other embodiments, the transport vehicle 1000 can also be a flying car, and its travel system can include wheels 1050 and axles, which are connected to the rotation output end of the motor 500 to rotate under the drive of the motor 500, thereby providing the transport vehicle 1000 with power for land travel.

[0026] See also Figure 2The embodiment of the present application also provides a motor 500, which can be applied to multiple fields, such as the transport vehicle 1000 mentioned above, and can also be used in the fields of pump bodies. The embodiment of the present application does not specifically limit the type of the motor 500, which can be a DC motor or an AC motor, an outer rotor motor or an inner rotor motor. Among them, the motor 500 of the embodiment of the present application includes a stator structure 200 and a rotor structure 400, and the rotor structure 400 forms a rotationally matched connection relationship with the stator structure 200 under the action of the magnetic field of the stator structure 200.

[0027] See also Figure 3 , the embodiment of the present application also provides a stator structure 200, which is applied to devices such as the motor 500 mentioned above. As one of the components of the motor 500, the stator structure 200 will generate a large amount of heat during the process of rotating with the rotor structure 400. The stator structure 200 needs to be cooled to avoid the internal short circuit of the stator structure 200 causing the motor 500 to not work properly. Therefore, the stator structure 200 in the embodiment of the present application may include a sealed cooling system 100 and a stator module 50, wherein the sealed cooling system 100 has a cooling liquid cavity 16, the stator module 50 is arranged in the cooling liquid cavity 16, and the cooling liquid supply device cooperates with the sealed cooling system 100 to inject low-temperature cooling liquid into the cooling liquid cavity 16. After the heat exchange with the stator structure 200 is completed, the cooling liquid carries the heat of the stator structure 200 and is discharged from the cooling liquid cavity 16.

[0028] See also Figure 4 In the embodiment of the present application, the sealed cooling system 100 may be used to cool the stator module 50 by spraying coolant or by immersing the stator module 50 in coolant, and the embodiment of the present application does not impose any specific restrictions on this. The sealed cooling system 100 provided in the present embodiment cools the stator module 50 by immersing the stator module 50 in coolant, which can increase the contact area between the coolant and the stator module 50 and improve the cooling efficiency of the sealed cooling system 100. It can be understood that there is hydraulic pressure in the cooling liquid chamber 16. In order to overcome the hydraulic pressure in the cooling liquid chamber 16 and ensure that the cooling liquid chamber 16 has good airtightness, in the embodiment of the present application, the sealed cooling system 100 may include a housing assembly 10, a sealing assembly 20 and a limit assembly 40.

[0029] The housing assembly 10 includes an inner housing 12 and an outer housing 14. The inner housing 12 is provided with a through hole 121, which passes through opposite ends of the inner housing 12. The outer housing 14 is disposed around the outer periphery of the inner housing 12 and is spaced apart from the inner housing 12. The outer housing 14 and the inner housing 12 define a cooling liquid chamber 16.

[0030] The sealing assembly 20 is disposed between the outer shell 14 and the inner shell 12, and the sealing assembly 20 is sealedly connected to the outer shell 14 and the inner shell 12, so that the coolant cavity 16 forms a sealed cavity. The stator module 50 is disposed in the coolant cavity 16; the housing assembly 10 is provided with a coolant inlet 13 and a coolant outlet 15, and the coolant inlet 13 and the coolant outlet 15 are arranged at intervals and are both connected to the coolant cavity 16. Specifically, the coolant flows into the coolant cavity 16 from the coolant inlet 13, and the coolant is discharged through the coolant outlet 15 after the heat exchange with the stator module 50 is completed.

[0031] The embodiment of the present application does not impose any specific restrictions on the position setting of the coolant inlet 13 and the coolant outlet 15. The coolant inlet 13 can be set in at least one of the inner shell 12 and the outer shell 14, and the coolant outlet 15 can be set in at least one of the inner shell 12 and the outer shell 14. In order to allow the coolant to fully absorb heat, the positions of the coolant inlet 13 and the coolant outlet 15 can be set so that the flow path of the coolant in the coolant cavity 16 is the longest. In this embodiment, the coolant inlet 13 and the coolant outlet 15 are respectively located on both sides of the housing assembly 10 along the radial direction of the through hole 121.

[0032] Specifically, see Figure 4 and Figure 5 In order to ensure that the coolant is led out of the coolant outlet 15 after sufficient heat exchange with the stator module 50, the coolant inlet 13 in this embodiment is arranged on the first inner end of the inner shell 12, and the coolant outlet is arranged on the second inner end 123 of the inner shell 12. The straight line defined by the coolant inlet 13 and the coolant outlet 15 intersects with the axis of the through hole 121, that is, the coolant inlet 13 and the coolant outlet 15 are symmetrically arranged at 180° under the projection along the direction of the through hole 121, so that the flow path of the coolant in the coolant cavity 16 is the longest, and the coolant and the stator module 50 are fully heat exchanged.

[0033] In the embodiment of the present application, the number of coolant inlets 13 and coolant outlets 15 can be set according to actual needs, and the embodiment of the present application does not impose specific restrictions on this. For example, the number of coolant inlets 13 can be set to multiple, and the multiple coolant inlets 13 are arranged at least one of the first inner end 122 of the inner shell 12 or the first outer end 141 of the outer shell 14 along the circumferential interval of the through hole 121. The number of coolant outlets 15 can be set to multiple, and the multiple coolant outlets 15 are arranged at least one of the second inner end 123 of the inner shell 12 or the second outer end 142 of the outer shell 14 along the circumferential interval of the through hole 121.

[0034] The limit assembly 40 is provided on the inner shell 12, and the limit assembly 40 cooperates with the outer shell 14 to limit the movement of the outer shell 14 relative to the inner shell 12, so as to keep the outer shell 14 and the inner shell 12 relatively still. Under the action of the limit assembly 14, the outer shell 14 will not move in the axial direction of the inner shell 12, so as to avoid the sealing connection relationship between the sealing assembly 20 and the inner shell 12 and the outer shell 14 from being destroyed, and to ensure that the sealing performance of the cooling liquid chamber 16 is not destroyed due to the displacement of the outer shell 14.

[0035] See also Figure 4 and Figure 5 In the embodiment of the present application, both the inner shell 12 and the outer shell 14 have two ends along the axial direction of the through hole 121, which is equivalent to the thinner tube body of the two tube bodies being inserted into the through hole of the thicker tube body. In order to facilitate the description of the relative positions of each structure, the two ends of the inner shell 12 along the axial direction of the through hole 121 are set as the first inner end 122 and the second inner end 123, and the two ends of the outer shell 14 along the axial direction of the through hole 121 are set as the first outer end 141 and the second outer end 142. Among them, the first outer end 141 and the first inner end 122 are arranged at a relative interval, and the second outer end 142 and the second inner end 123 are arranged at a relative interval. In order to keep the position of the outer shell 14 stable relative to the inner shell 12, it is necessary to define the position of both the first outer end 141 and the second outer end 142 of the outer shell 14. The limiting assembly 40 of the embodiment of the present application includes a first limiting member 41 and a second limiting member 43. One side of the first limiting member 41 is connected to the first inner end 122, and the other side is pressed against the first outer end 141. One side of the second limit member 43 is connected to the second inner end 123, and the other side is pressed against the second outer end 142. The embodiment of the present application does not specifically limit the specific structure of the first limit member 41 and the second limit member 43. For example, the first limit member 41 can be an annular plate structure, which is provided at the first inner end 122 and pressed against the first outer end 141. The second limit member 43 can also be an annular plate structure, which is provided at the second inner end 123 and pressed against the second outer end 142. Similarly, the first limit member 41 can also be a block structure, which is provided at the first inner end 122 and pressed against the first outer end 141. The second limit member 43 can also be a block structure, which is provided at the second inner end 123 and pressed against the second outer end 142. Regardless of whether it is an annular plate structure, a block structure or other structures, the function is to limit the movement of the outer shell 14 along the axial direction of the through hole 121.

[0036] See also Figure 6In order to reduce the difficulty of assembling and disassembling the inner shell 12 and the outer shell 14, in this embodiment, at least the first stopper 41 is set as a block structure. In this embodiment, the first stopper 41 is movably connected to the first inner end 122 so that the first stopper 41 can switch back and forth between two states of pressing against the first outer end 141 and avoiding the first outer end 141. Specifically, in this embodiment, a first mounting hole 1221 is opened on the end surface of the first inner end 122, and an adjustment hole 411 is provided on the side of the first stopper 41 close to the inner shell 12. The adjustment hole 411 has an extension space along the radial direction of the through hole 121, and the adjustment hole 411 is used for the fixing member to pass through to connect with the first mounting hole 1221 on the inner shell 12. Therefore, the stopper assembly 40 in the embodiment of the present application may also include a first fixing member 42. The embodiment of the present application does not specifically limit the first fixing member 42, which can be a screw or a pin. The first fixing member 42 is inserted through the adjustment hole 411 and locked into the first mounting hole 1221 on the first inner end 122 of the inner shell 12, so that the side of the first limiting member 41 away from the inner shell 12 is overlapped on the end surface of the first outer end 141. Because the adjustment hole 411 has an extension space along the radial direction of the through hole 121, the connection relationship between the first limiting member 41 and the first fixing member 42 and the first inner end 122 is a movable connection relationship.

[0037] See also Figure 7 Specifically, the adjustment hole 411 can be a waist-shaped hole or a strip-shaped long groove, and the embodiment of the present application does not impose specific restrictions on this. In this embodiment, a waist-shaped hole is selected as the adjustment hole 411, and the length direction of the waist-shaped hole is arranged along the radial direction of the through hole 121. The waist-shaped hole defines the movement stroke of the first limiter 41. The first limiter 41 with the waist-shaped hole cooperates with the first fixing member 42, and the first limiter 41 can move on the movement stroke defined by the waist-shaped hole.

[0038] When the first stopper 41 moves to one end of its movement stroke, the side of the first stopper 41 away from the inner shell 12 overlaps the end surface of the first outer end 141. When the first stopper 41 moves to the other end of its movement stroke, the side of the first stopper 41 away from the inner shell 12 is located inside the outer shell 14 to avoid the end surface of the first outer end 141 of the outer shell 14, so as to facilitate the removal of the outer shell 14.

[0039] In actual application, if the outer shell 14 needs to be removed from the sealed cooling system 100, the first stopper 41 is moved on its movement stroke so that the side of the first stopper 41 away from the inner shell 12 is located inside the outer shell 14 to avoid the outer shell 14, and then the outer shell 14 is removed to complete the disassembly. If the outer shell 14 needs to be installed, the side of the first stopper 41 away from the inner shell 12 needs to be moved to within the outline of the space occupied by the outer shell 14 to avoid the first stopper 41 blocking the outer shell 14 when installing the outer shell 14, and then the outer shell 14 is sleeved on the outer periphery of the inner shell 12. After adjustment, the first stopper 41 is moved on its movement stroke so that the side of the first stopper 41 away from the inner shell 12 is overlapped on the end face of the first outer end 141 of the outer shell 14 to complete the installation of the outer shell 14.

[0040] See also Figure 4 and Figure 6 In this embodiment, the end surface of the first inner end 122 of the inner shell 12 is recessed relative to the end surface of the first outer end 141 of the outer shell 14, so that the first limiting member 41 can be simultaneously overlapped on the end surface of the first inner end 122 and the end surface of the first outer end 141, so as to ensure that there is a strong pre-tightening force between the first fixing member 42 and the first mounting hole 1221. In this embodiment, the limiting assembly 40 also includes a gasket 44. The gasket 44 is provided with a matching hole, and the gasket 44 is located between the end surface of the first inner end 122 and the first limiting member 41. The end surface of the gasket 44 facing the first limiting member 41 is flush with the end surface of the first outer end 141. The first fixing member 42 is sequentially penetrated through the adjustment hole 411 and the matching hole of the first limiting member 41, and is locked into the first mounting hole 1221 to connect the first limiting member 41 to the first inner end 122. At the same time, the gasket 44 raises the side of the first limiting member 41 connected to the inner shell 12 , so that the first limiting member 41 can be overlapped with the end surface of the first inner end 122 and the end surface of the first outer end 141 at the same time.

[0041] See also Figure 8, the embodiment of the present application does not specifically limit the connection mode between the second stopper 43 and the second inner end 123, which can be a fixed connection or a movable connection. In the embodiment of the present application, the first stopper 41 corresponding to the first outer end 141 of the outer shell 14 is movable, which has met the condition of convenient assembly or disassembly of the outer shell 14. Therefore, in the present embodiment, the second stopper 43 is fixedly connected to the second inner end 123. In other embodiments of the present application, a movable connection mode can still be selected, which can be flexibly adjusted according to actual conditions. Specifically, in the present embodiment, the second inner end 123 protrudes along the axial direction of the through hole 121 relative to the second outer end 142. A connecting hole 1231 is provided on the side wall of the second inner end 123. The connecting hole 1231 penetrates the side wall of the second inner end 123 of the inner shell 12 along the radial direction of the through hole 121. Correspondingly, a second mounting hole 431 is provided on the side of the second stopper 43 close to the inner shell 12. Therefore, according to the actual structure of the second stopper 43 and the inner shell 12, the stopper assembly 40 in the present embodiment also includes a second fixing member 45. The embodiment of the present application does not specifically limit the type of the second fixing member 45, which can be a screw or a pin. Specifically, the second fixing member 45 passes through the connection hole 1231 in the through hole 121 of the inner shell 12 and is locked into the second mounting hole 43, so that the second limiting member 43 is fixedly connected to the second inner end 123, and the second limiting member 43 is overlapped on the end surface of the second outer end 142.

[0042] It can be understood that the beneficial effect of limiting the outer shell 14 can be achieved by selecting a block structure as the first limit member 41 and the second limit member 43. Therefore, in this embodiment, the first limit member 41 and the second limit member 43 are both block structures. The block structure is smaller and has stronger adaptability, which makes it easier to find a suitable position on the inner shell 12.

[0043] Please refer to Figure 4 and Figure 5 In the embodiment of the present application, the number of the first stopper 41 and the second stopper 43 can be set according to the actual situation of the sealed cooling system 100, and the embodiment of the present application does not impose specific restrictions on this. In the present embodiment, the number of at least one of the first stopper 41 and the second stopper 43 is multiple. Specifically, if there are multiple first stoppers 41, the multiple first stoppers 41 are sequentially spaced along the circumference of the through hole 121, and are respectively connected to the end surface of the first inner end 122, and each first stopper 41 is tightly against the end surface of the first outer end 141. If there are multiple second stoppers 43, the multiple second stoppers 43 are sequentially spaced along the circumference of the through hole 121, and are respectively connected to the side wall of the second inner end 123, and each second stopper 43 is tightly against the end surface of the second outer end 142. Among them, the number of the first stopper 41 and the number of the second stopper 43 are independent of each other and will not affect each other.

[0044] See also Figure 6 and Figure 8 The sealing assembly 40 in the embodiment of the present application may be a structure welded between the inner shell 12 and the outer shell 14, or a structure sealed and connected to the inner shell 12 and the outer shell 14, and the embodiment of the present application does not specifically limit this. It can be understood in the embodiment of the present application that the first inner end 122 and the first outer end 141 form an opening on one side of the cooling liquid chamber 16, and the second inner end 123 and the second outer end 142 form an opening on the other side of the cooling liquid chamber 16. In order to seal the openings on both sides, the sealing assembly 40 in the present embodiment may include a first seal 21 and a second seal 24.

[0045] The first seal 21 is disposed between the first inner end 122 and the first outer end 141. As one of the limiting components of the cooling liquid chamber 16, the first seal 21 is subjected to the oil pressure inside the cooling liquid chamber 16. In this embodiment, the end surface of the first seal 21 is set flush with the end surface of the first outer end 141, and the first stopper 41 is superimposed on the end surface of the first outer end 141 and also on the end surface of the first seal 21. The first stopper 41 cooperates with the first seal 21 to overcome the force of the oil pressure inside the cooling liquid chamber 16 on the first seal 21.

[0046] Similarly, the second seal 24 is arranged between the second inner end 123 and the second outer end 142, and the end face of the second seal 24 is set to be flush with the end face of the second outer end 142. The second limit member 43 is overlapped on the end face of the second seal 24 and also overlapped on the end face of the second outer end 142 to overcome the force of the oil pressure inside the coolant chamber 16 on the second seal 24.

[0047] The embodiment of the present application does not impose any specific restrictions on the sealing connection method between the first seal 21 and the second seal 24 and the inner shell 12 and the outer shell 14. It can be a bonding method, a method of sealing the gap through a sealing ring, or a combination of multiple sealing connection methods.

[0048] See also Figure 6In this embodiment, the first sealing member 21 can be bonded to the outer shell 14, and a first adhesive groove 213 is provided on the side of the first sealing member 21 facing the outer shell 14, and the first adhesive groove 213 is used to store excess adhesive. In order to ensure the sealing between the first sealing member 21 and the outer shell 14, a sealing ring sealing gap method can also be selected. Specifically, the sealing assembly 20 of this embodiment also includes a first sealing ring 22, and a first sealing groove 214 is provided on the side of the first sealing member 21 facing the outer shell 14. The first sealing ring 22 is embedded in the first sealing groove 21 and fits tightly with the outer shell 14. Similarly, in order to seal the first sealing member 21 and the inner shell 12, the sealing assembly 20 in this embodiment can also include a second sealing ring 23, and a second sealing groove 1222 is provided on the side of the first inner end 122 of the inner shell 12 facing the first sealing member 21. The second sealing ring 23 is embedded in the second sealing groove 1222 and fits tightly with the first sealing member 21. In summary, in this embodiment, one or more combinations of multiple sealing connection methods can be used to enable the first sealing member 21 to seal the opening defined by the first inner end 122 and the first outer end 141 .

[0049] See also Figure 8 Similarly, in the present embodiment, the second sealing member 24 is bonded to the outer shell 14, and a second adhesive groove 243 is provided on the side of the second sealing member 24 facing the outer shell 14. The sealing assembly 20 in the present embodiment may further include a third sealing ring 25, and a third sealing groove 244 is provided on the side of the second sealing member 24 facing the outer shell, and the third sealing ring 25 is embedded in the third sealing groove 244 and fits tightly with the outer shell 14. The sealing assembly 20 in the present embodiment may further include a fourth sealing ring 26, and a fourth sealing groove 1232 is provided on the side of the second inner end 123 of the inner shell 122 facing the second sealing member 24, and the fourth sealing ring 26 is embedded in the fourth sealing groove 1232 and fits tightly with the second sealing member 24. In summary, it can be seen that in the present embodiment, the second sealing member 24 can seal the opening defined by the second inner end 123 and the second outer end 142 through a combination of one or more of a plurality of sealing connection methods.

[0050] See also Fig. 9 Generally, the housing 14 is made of a material that has rigidity and sealing performance that can meet the requirements of the stator structure 200. The embodiment of the present application does not specifically limit this. The housing 14 can be made of metal or carbon fiber. However, materials such as metal and carbon fiber have conductive properties. In order to ensure that the stator module 50 and the housing 14 of the sealed cooling system 100 maintain an insulating relationship, in the embodiment of the present application, the stator module 50 is separated from the housing by the first seal 21 and the second seal 24.

[0051] Specifically, the first sealing member 21 in the embodiment of the present application may include a first sealing portion 211 and a first spacer portion 212, the first sealing portion 211 is sealingly connected between the first inner end 122 and the first outer end 141, the first spacer portion 212 is connected to the first sealing portion 211 and is attached to the outer shell 14, the attachment method may be the bonding method mentioned above, and the first spacer portion protrudes relative to the first sealing portion 211 in the direction toward the second sealing member 24, so as to be used to space the stator module 50 and the outer shell 14; similarly, the second sealing member 24 in the embodiment of the present application may include a second sealing portion 241 and a second spacer portion 242, the second sealing portion 241 is sealingly connected between the second inner end 123 and the second outer end 142, the second spacer portion 241 is connected to the second sealing portion 241 and is attached to the outer shell 14, the attachment method may be the bonding method mentioned above, and the second spacer portion 242 protrudes relative to the second sealing portion 241 in the direction toward the first sealing member 21, so as to be used to space the stator module 50 and the outer shell 14.

[0052] The extension length of the first spacer 212 relative to the first sealing portion 211 and the extension length of the second spacer 242 relative to the second sealing portion 241 can be set according to actual conditions, and the embodiment of the present application does not impose specific restrictions on this. For example, the extended end of the first spacer 212 and the extended end of the second spacer 242 can be set at intervals, or can be connected, or can overlap each other.

[0053] See also Fig.10 , the stator module 50 in the embodiment of the present application may include a stator core 52 and a plurality of windings 54. It can be understood that the heat of the stator core 52 needs to be transferred to the coolant through the windings 56. In order to enable the coolant to directly exchange heat with the stator core 52 to increase the cooling speed of the stator module 50, in the embodiment of the present application, a plurality of guide grooves 5212 are provided on the stator core 52. Each guide groove 5212 passes through both ends of the stator core 52 along the axial direction of the through hole 121 and is connected to the coolant cavity 16. The coolant can pass through the plurality of guide grooves 5212 and then directly contact the stator core 52 to directly absorb the heat of the stator core 52.

[0054] The stator core 52 includes different forms such as an external tooth type and an internal tooth type, and the embodiment of the present application does not specifically limit this. In this embodiment, taking the stator core 52 with an external tooth shape as an example, the stator core 52 may include a stator yoke 521 and a plurality of stator teeth 523, and the plurality of stator teeth 523 are arranged on the outer periphery of the stator yoke 521 at intervals along the circumference of the stator yoke 521, and two adjacent stator teeth 523 define a winding slot 525, and each winding 54 is wound around a corresponding stator tooth 523.

[0055] The guide groove 5212 in the embodiment of the present application can be set at any position of the stator core 52, can be set on the stator teeth 523, and can also be set on the stator yoke 521. The embodiment of the present application does not impose any specific limitation on this.

[0056] It can be understood that after the winding 54 is energized, the winding 54 generates a magnetic field, and the high magnetic field density area is located at the position of the stator teeth 523. In this embodiment, in order to prevent the setting of the guide groove 5212 from affecting the magnetic field formed by the stator core 52, the guide groove 5212 is opened on the stator yoke 521, and the straight line defined by the position of the guide groove 5212 on the stator yoke 521 and the position of the stator teeth 53 on the stator yoke 521 is not colinear with any diameter of the stator yoke 521. It can be understood that it is impossible for the stator teeth 523 and the guide groove 5212 to appear at the same time on any diameter of the stator yoke 521. The guide groove 5212 in this embodiment avoids the high magnetic field density area on the stator core 52 and will not affect the magnetic field on the stator core 52.

[0057] Separating the stator module 50 from the shell 14 of the housing assembly 10 can prevent the stator module 50 from leaking electricity. In addition to the above-mentioned first spacing portion 212 of the first seal 21 and the second spacing portion 242 of the second seal 24, insulation can also be provided by cutting into the stator module 50 itself.

[0058] See also Fig.11 , Fig.12 and Fig.13 , the winding 54 in this embodiment is wound on the stator teeth 523 of the external tooth type stator core 52, and the side of each winding 54 close to the housing 14 and the linear end 541 of the winding 54 may contact the housing 14, thereby causing leakage. Therefore, in this embodiment, the stator structure 200 may also include a plurality of insulating papers 60, each of which is laid in a corresponding winding slot 525. The two sides of each stator tooth 523 are covered with insulating paper 60, and each winding 54 is wound on a corresponding stator tooth 523, and is also wound on the insulating paper 60 on both sides of the stator tooth 523, so that the insulating paper 60 is located between the stator tooth 53 and the winding 56. The two side edges of each insulating paper 60 facing away from the center of the stator yoke 521 cover the side of the winding 54 facing the housing 14 so that the insulating paper 60 is located between the housing 14 and the winding 54 , thereby preventing the winding 54 and the linear end 541 of the winding 54 from contacting the housing 14 .

[0059] See also Fig.12Furthermore, in order to ensure that the insulating paper 60 remains in a state of covering the winding 54, in an embodiment of the present application, the stator structure 200 also includes a plurality of clamping members 70, and the plurality of clamping members 70 and the plurality of winding slots 55 are arranged in a one-to-one correspondence; the clamping members 70 are located at the notches of the winding slots 55 and press against the insulating paper 60, so that the insulating paper 60 is located between the winding 54 and the clamping members 70, so that the winding 54 is completely isolated from the outer shell 14, preventing the winding 54 from contacting the outer shell 14 and causing leakage, and can ensure that the winding 54 is separated from the stator teeth 523, preventing internal short circuit of the stator module 50.

[0060] See also Fig.13 A gap is formed between two adjacent windings 56 in the corresponding winding slot 525. In another embodiment of the present application, a clamping member 70 is provided with a clamping portion 71 on one side facing the corresponding winding slot 525. The clamping portion 71 squeezes the two side edges of the insulating paper 60 so that the two edges fit against the corresponding surface of the winding 54.

[0061] The sealed cooling system 100 in the embodiment of the present application limits the axial direction of the shell 14 of the shell assembly 10 by the first limit member 41 and the second limit member 43 of the limit assembly 40, which can prevent the shell 14 from moving along its axial direction, and prevent the movement of the shell 14 from affecting the sealed connection relationship between the sealing assembly 20 and the shell assembly 10, and can ensure that the cooling liquid cavity 16 defined by the shell assembly 10 and the sealing assembly 20 maintains good sealing performance and prevents coolant leakage. On the one hand, it can avoid environmental pollution and line abnormalities caused by coolant leakage, and on the other hand, it can ensure the cooling effect of the sealed cooling system 100 on the stator module 50 in the cooling liquid cavity 16.

[0062] In the specification of this application, certain words are used to refer to specific components in the specification and claims. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of the components as the criterion for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to"; "substantially" means that those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0063] In the description of the present application, it should be understood that terms such as "upper", "lower", "front", "back", "left", "right", and "inside" indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are merely simplified descriptions for the convenience of describing the present application. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0064] In this application, unless otherwise clearly specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be internal communication between two elements, or it can be only surface contact. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0066] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A sealed cooling system, characterized in that: For installing the stator module, the sealed cooling system comprises: A shell assembly, the shell assembly comprises an inner shell and an outer shell, the inner shell is provided with a through hole, the through hole passes through opposite ends of the inner shell; the outer shell is arranged around the outer periphery of the inner shell and is spaced apart from the inner shell, the outer shell and the inner shell define a cooling liquid cavity, the cooling liquid cavity is used to set the stator module, the shell assembly is provided with a cooling liquid inlet and a cooling liquid outlet, the cooling liquid inlet and the cooling liquid outlet are spaced apart and are both connected to the cooling liquid cavity; a sealing assembly, disposed between the outer shell and the inner shell to seal the outer shell and the inner shell; and A limiting assembly is arranged on the inner shell, and the limiting assembly cooperates with the outer shell to limit the movement of the outer shell relative to the inner shell.

2. The sealed cooling system according to claim 1, characterized in that: The inner shell has a first inner end and a second inner end along the axial direction of the through hole; the outer shell has a first outer end and a second outer end along the axial direction of the through hole, the first outer end and the first inner end are arranged with a relative interval, and the second outer end and the second inner end are arranged with a relative interval; The limiter components include: a first stopper, one side of which is connected to the first inner end and the other side of which is pressed against the first outer end; and A second limiting member, wherein one side of the second limiting member is connected to the second inner end, and the other side of the second limiting member is pressed against the second outer end.

3. The sealed cooling system according to claim 2, characterized in that: A first mounting hole is formed on the end surface of the first inner end; an adjustment hole is formed on a side of the first stopper close to the inner shell, and the adjustment hole has an extension space along the radial direction of the through hole; The limiting assembly also includes a first fixing member, which is adjustably inserted into the adjusting hole and locked into the first mounting hole, so that the side of the first limiting member away from the inner shell is overlapped with the end surface of the first outer end.

4. The sealed cooling system according to claim 3, characterized in that: An end surface of the first inner end is recessed relative to an end surface of the first outer end; The limiting assembly also includes a gasket, which is provided with a matching hole. The gasket is located between the end surface of the first inner end and the first limiting member. The first fixing member is sequentially inserted into the adjustment hole and the matching hole and locked into the first mounting hole.

5. The sealed cooling system according to claim 2, characterized in that: The second inner end protrudes in the axial direction of the through hole relative to the second outer end, and the second inner end is provided with a connecting hole, and the connecting hole penetrates the second inner end in the radial direction of the through hole; the second stopper is provided with a second mounting hole on one side close to the inner shell; The limiting component also includes a second fixing member, which is passed through the connecting hole and locked into the second mounting hole, so that the second limiting member is overlapped on the end surface of the second outer end.

6. The sealed cooling system according to claim 2, characterized in that: There are multiple first limit members, which are sequentially arranged at intervals along the circumference of the through hole and respectively connected to the first inner end, and each first limit member is tightly against the end surface of the first outer end; or / and There are multiple second position-limiting members, which are sequentially arranged at intervals along the circumference of the through hole and respectively connected to the second inner end, and each second position-limiting member is tightly pressed against the end surface of the second outer end.

7. The sealed cooling system according to claim 2, characterized in that: The sealing assembly comprises: a first sealing member disposed between the first inner end and the first outer end, an end surface of the first sealing member being flush with an end surface of the first outer end, and the first limiting member being overlapped with the end surface of the first sealing member and the end surface of the first outer end; and The second sealing member is arranged between the second inner end and the second outer end, the end surface of the second sealing member is flush with the end surface of the second outer end, and the second limiting member is overlapped on the end surface of the second sealing member and the end surface of the second outer end.

8. The sealed cooling system according to claim 7, characterized in that: The first sealing member is bonded to the housing, and a first adhesive groove is formed on a side of the first sealing member facing the housing; and / or, The sealing assembly further includes a first sealing ring, a first sealing groove is formed on a side of the first sealing member facing the housing, the first sealing ring is embedded in the first sealing groove and fits tightly against the housing; and / or, The sealing assembly further includes a second sealing ring, a second sealing groove is formed on a side of the inner shell facing the first sealing member, and the second sealing ring is embedded in the second sealing groove and fits tightly with the first sealing member; and / or, The second sealing member is bonded to the housing, and a second adhesive groove is formed on a side of the second sealing member facing the housing; and / or, The sealing assembly further includes a third sealing ring, a third sealing groove is formed on a side of the second sealing member facing the housing, the third sealing ring is embedded in the third sealing groove and fits tightly against the housing; and / or, The sealing assembly further includes a fourth sealing ring. A fourth sealing groove is formed on a side of the inner shell facing the second sealing member. The fourth sealing ring is embedded in the fourth sealing groove and fits tightly with the second sealing member.

9. The sealed cooling system according to claim 7, characterized in that: The first sealing member includes a first sealing portion and a first spacing portion, wherein the first sealing portion is sealingly connected between the first inner end and the first outer end, and the first spacing portion is connected to the first sealing portion and protrudes relative to the first sealing portion to be used for spacing the stator module and the housing; and / or, The second sealing member includes a second sealing portion and a second spacing portion, wherein the second sealing portion is sealingly connected between the second inner end and the second outer end, and the second spacing portion is connected to the second sealing portion and protrudes relative to the second sealing portion to space the stator module and the housing.

10. The sealed cooling system according to any one of claims 1 to 9, characterized in that: The coolant inlet is provided at least one of the inner shell and the outer shell, and the coolant outlet is provided at least one of the inner shell and the outer shell; Wherein, the coolant inlet and the coolant outlet are respectively located on both sides of the shell component along the radial direction of the through hole.

11. A stator structure, characterized in that: include: A sealed cooling system as claimed in any one of claims 1 to 10; as well as, The stator module is arranged in the cooling liquid cavity.

12. The stator structure according to claim 11, characterized in that: The material of the shell includes carbon fiber or metal; The stator module comprises a stator yoke, a plurality of stator teeth and a plurality of windings, wherein the stator yoke is arranged around the outer periphery of the inner shell, and the plurality of stator teeth are arranged on the outer periphery of the stator yoke in sequence and at intervals along the circumferential direction of the stator yoke, and two adjacent stator teeth define a winding slot, and each winding is wound around a corresponding stator tooth; The stator structure further includes a plurality of insulating papers, each of which is laid in a corresponding winding slot, and the insulating paper is located between the stator teeth and the winding, and between the housing and the winding.

13. The stator structure according to claim 12, characterized in that: The stator structure also includes a plurality of clamping members, which are arranged one-to-one with the plurality of winding slots; the clamping members are located at the notches of the winding slots and press against the insulating paper, and the insulating paper is also located between the winding and the clamping members.

14. The stator structure according to any one of claims 11 to 13, characterized in that: The stator module comprises a stator core and a plurality of windings; the stator core is provided with a plurality of guide grooves, the guide grooves penetrate through both ends of the stator core along the axial direction of the through hole and are connected to the cooling liquid cavity.

15. The stator structure according to claim 14, characterized in that: The stator core comprises a stator yoke and a plurality of stator teeth, wherein the plurality of stator teeth are arranged on the stator yoke at intervals along the circumferential direction of the stator yoke, and two adjacent stator teeth define a winding slot; The guide groove is a through hole structure arranged on the stator yoke, and the straight line defined by the position of the guide groove on the stator yoke and the position of the stator tooth adjacent to the guide groove on the stator yoke is not colinear with any diameter of the stator yoke.

16. A motor, characterized in that: include: The stator structure according to any one of claims 11 to 15; as well as, The rotor module is rotatably matched with the stator structure.

17. A transport vehicle, characterized in that: It comprises a machine body and the motor as claimed in claim 16, wherein the motor is installed in the machine body.

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