Motor cooling system

Abstract

A system for preventing coolant leakage in an electric machine cooling system (200). In one example, a seal ring (304) configured with a stator seal (402) may be integrated as part of a cooling system seal assembly (300). The sealing ring (304) includes a flange (404), a plurality of channels (406) disposed radially on the sealing ring, a plurality of grooves (410), a plurality of surface grooves (408), a raised region (504) configured with anchors (514) for securing the stator seal, a recessed region (506) in which a plurality of securing posts (516) are located; a peripheral groove (412) located at the peripheral edge of the sealing ring and located between the two sides of the sealing ring; the sealing piece is integrally connected with the inner edge of the sealing ring and extends from the inner diameter to the protruding area of the sealing ring.

Description

Cross-reference search of related applications

[0001] This application claims priority to U.S. Provisional Application No. 63 / 591,025, entitled “Motor Cooling System,” filed on October 17, 2023. The entire contents of the above application are hereby incorporated by reference into this application. Technical Field

[0002] The present disclosure relates to an electric machine with a cooling system, the system including a seal assembly providing a seal between a stator and the seal assembly. Background Art

[0003] In electric vehicle (EV) motor applications, stator winding cooling is used to improve motor efficiency. For example, in some applications, efficiency targets may require oil to flow through the stator. However, in some previous cooling system designs, the oil flows through an internal cavity, from which the oil can leak into the air gap between the rotor and the stator. The oil in the air gap causes drag losses, which significantly reduces the efficiency of the motor. The inventors recognized that sealing the stator cooling device from other areas of the motor (such as the rotor cavity) can avoid the loss of motor efficiency. In particular, existing cooling systems use sealing rings and sealing sleeve tubes, but there is no adequate seal between the sealing rings and the stator end face of the stator. Summary of the invention

[0004] In order to overcome at least some of the above problems, the inventors have developed an elastic seal connected to a sealing ring, which can be integrated into a motor cooling system consisting of a sealing ring and a sealing sleeve tube. In one example, the sealing ring equipped with the seal includes a flange located on one side of the sealing ring, a plurality of channels located in the radial direction of the sealing ring, a plurality of grooves aligned with each channel, a plurality of surface grooves (where each surface groove is located between two adjacent channels), a raised area located near the outer diameter of the sealing ring and equipped with an anchor for fixing the seal, a recessed area located near the outer diameter of the sealing ring and equipped with an anchor for fixing the seal, a raised area located near the outer diameter of the sealing ring and equipped with an anchor for fixing the seal, a recessed area located near the outer diameter of the sealing ring and equipped with an anchor for fixing the seal, a recessed area located near the outer diameter of the sealing ring and equipped with an anchor for fixing the seal, a recessed area near the outer diameter of the sealing ring and equipped with an anchor for fixing the seal, a recessed area near the inner diameter of the sealing ring, a plurality of fixing posts located in the recessed area of ​​the sealing ring, a peripheral groove located at the peripheral edge of the sealing ring and located between the two sides of the sealing ring, wherein the seal is integral with the inner edge of the sealing ring and extends from the inner diameter of the sealing ring to the raised area of ​​the sealing ring. The seal is compressed between the stator and the sealing sleeve. In this way, the sealing cavity formed by the arrangement of the sealing ring and the sealing sleeve prevents the fluid from flowing into the rotor cavity, especially the air gap of the motor. As a result, the motor can achieve the target efficiency if necessary.

[0005] It should be understood that the above summary is intended to introduce in a simplified form the concepts that are further described in the detailed description. It is not intended to identify key or essential features of the claimed subject matter, the scope of which is uniquely determined by the claims that follow the detailed description. Furthermore, the claimed subject matter is not limited to implementations that solve any disadvantages noted above or in any part of this disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 The motor is shown with the cooling system.

[0007] Figure 2 Shows Figure 1 Cross-section of the electric machine and cooling system described in .

[0008] Figure 3 An example of a seal assembly is shown with a seal ring configured as an example seal.

[0009] Figure 4 A detailed example of a sealing sleeve is shown, in which a seal is arranged.

[0010] Figure 5A and Figure 5B Shows the Figure 1 Different views of the sealing ring with integrated seal in the cooling system of an electric machine are shown. DETAILED DESCRIPTION

[0011] A sealing assembly integrated in an immersion cooling system is described to achieve a target efficiency of an electric machine. The sealing assembly comprises a sealing ring provided with a seal and a sealing sleeve, which are arranged to form a sealed cavity around a stator end winding. The sealing ring may be provided with a coupling element to couple the seal to the sealing ring. The seal prevents coolant from entering the rotor cavity at the location where the sealing ring is in axial contact with the stator. Integrating the seal into the sealing ring reduces the drag losses caused by the coolant in the air gap. The geometry of the bead-shaped profile of the sealing ring does not intrude into the cavity of the motor rotor and ensures a constant sealing pressure and contact width of the sealing ring without excessive stress on the elastic material. As a result, the seal between the sealing ring and the stator can be effectively and firmly fixed in the motor, thereby reducing the possibility of coolant leakage from the sealed cavity between the sealing ring and the stator.

[0012] Figure 1A schematic diagram of an electric motor 100 is shown. The electric motor 100 may be designed as a motor generator and may be included in a system 102, which may be in a variety of forms. For example, in one example, the electric motor 100 may be integrated into an electric drive system of an electric vehicle (EV). Thus, in such an example, the electric motor is a traction motor, and the electric drive may further include a gearbox (e.g., a transmission), etc. In the electric vehicle example, the electric vehicle may be an all-electric vehicle (e.g., a battery electric vehicle (BEV)) in one example, or a hybrid electric vehicle (HEV) with an internal combustion engine in another example. However, in other examples, the electric motor may also be used in other suitable systems (e.g., stationary systems), such as industrial machinery, agricultural systems, mining systems, etc.

[0013] The motor 100 includes a rotor 104 that electromagnetically interacts with a stator 106 to drive a rotor shaft 108 in the rotor to rotate. The motor 100 in the illustrated example includes a housing 110 with an electrical interface 112 for the stator 106. The electrical interface 112 can be a multi-phase electrical interface with a plurality of electrical connectors 114. In the illustrated example, the electrical interface 112 is a three-phase interface. However, it will be appreciated that in other examples, the electrical interface can be a six-phase interface or a nine-phase interface. More generally, the motor 100 can be a multi-phase alternating current (AC) machine. However, in other examples, the motor 100 can be a direct current (DC) machine.

[0014] like Figure 1 As shown, the motor 100 may be connected to an inverter 116. The inverter 116 is designed to convert direct current (DC) power to alternating current (AC) power, and vice versa. Therefore, as described above, the motor 100 may be an AC motor. However, in other examples, the motor 100 may be a DC motor (as described above), and therefore the inverter 116 may be omitted from the system 102. The inverter 116 may receive electrical energy from one or more energy storage devices 118 (e.g., a traction battery, a capacitor, a combination thereof, etc.). Arrow 120 indicates the transfer of electrical energy between the motor 100, the inverter 116, and the energy storage device 118, which may occur in different system operating modes.

[0015] The system 102 may also include a control subsystem 180 with a controller 182. The controller 182 includes a processor 184 and a memory 186. The memory 186 may store instructions that, when executed by the processor 184, cause the controller 182 to perform various methods, control techniques, etc. described herein. The processor 184 may include a microprocessor unit and / or other types of circuits. The memory 186 may include known data storage media, such as random access memory, read-only memory, keep-alive memory, combinations thereof, etc.

[0016] The controller 182 may receive various signals from sensors 188 disposed at various locations in the system 102. The sensors 188 may include motor speed sensors, energy storage device temperature sensors, energy storage device charge status sensors, inverter power sensors, and the like. The controller 182 may also send control signals to various actuators 190 coupled to various locations in the system 102. For example, the controller may send a signal to the inverter 116 to adjust the speed of the motor 100. In another example, the controller 182 may send a command signal to the motor 100 and / or the inverter 116, and in response, the motor speed may be adjusted. Other controllable components in the system 102 may adjust the command signals and actuators in a similar manner.

[0017] The system 102 may also include one or more input devices 192 (eg, an accelerator pedal, a brake pedal, a console dashboard, a touch interface, a touch panel, a keyboard, combinations thereof, etc.) The input device 192 may generate a motor speed adjustment request in response to a user input.

[0018] Figure 1 and Figure 2 An axis system is provided for reference. In one example, the z-axis can be a vertical axis (e.g., parallel to the gravity axis), the x-axis can be a lateral axis (e.g., a horizontal axis), and / or the y-axis can be a longitudinal axis. However, in other examples, these axes may have other orientations. Figure 1 and Figure 2 A rotating shaft 199 of the motor 100 is further provided for reference. Figure 1 Provided in Figure 2 The cutting plane 2-2 of the cross-sectional view is shown. The cutting plane 2-2 extends through the rotating shaft of the motor.

[0019] Figure 2 A cross-sectional view of the electric machine 100 and the electric machine cooling system 200 is shown. The figure again shows the rotor 104 and the stator 106 of the electric machine 100, as well as the housing 110 that at least partially encloses the rotor and the stator. The rotor shaft 108 is Figure 2 Further explanation is given in.

[0020] The cooling system 200 may include a pump 202 and a filter 204 for delivering a coolant (e.g., natural oil and / or synthetic oil) to the stator 106. Arrows 205 depict the flow of coolant between the pump 202, the filter 204, and the cooling system 200. In detail, in one example, the pump 202 can deliver coolant to a channel 206 that axially passes through the core 208 of the stator 106. However, other coolant flow patterns may be used in other examples. Schematic diagram of the pump 202 and the filter 204. However, it will be appreciated that they may be more complex in actual applications. In addition, the pump and filter are spaced a distance from the motor 100.

[0021] An air gap 210 is formed between the iron core 212 of the rotor 104 and the stator iron core 208. Due to the sealing of the coolant in the cooling system 200, the possibility of the coolant entering the air gap is greatly reduced (eg, avoided).

[0022] The cooling system 200 also includes a first sealing ring 214 and a first sealing sleeve 216, which are located on a first axial side 218 of the stator 106 (e.g., the stator core 208). In one example, the first axial side 218 can be a welded side. The first sealing ring 214 can be coupled to the stator 106 (e.g., the stator core). Specifically, in one example, the first sealing ring 214 can be adhered to the stator 106. However, in other examples, the first sealing ring can be machined or otherwise integrally formed in the stator 106.

[0023] The first seal ring 214 may be configured with a stator seal disposed along an edge of an inner diameter of the first seal ring 214. The stator seal may prevent coolant from entering the rotor cavity from a location between the first seal ring 214 and the stator 106. Figure 4-5B An example of a sealing ring is described. The first sealing ring 214 may be part of a sealing assembly that includes a sealing ring configured with a stator seal between the sealing ring and the stator and a sealing sleeve. Figure 3 The sealing sleeve is described in detail.

[0024] The first sealing sleeve 216 and the first sealing ring 214 are connected via a first sealing interface 222 and a second sealing interface 224, which form a sealing chamber 226 in which the stator end winding 228 is located. The sealing chamber 226 can receive and / or deliver coolant from the coolant channel 206 in the stator core 208. The sealing chamber 226 is particularly fluidically isolated from the rotor chamber 227. In this way, the coolant can be prevented from entering the air gap to cause resistance loss of the motor, thereby improving the efficiency of the motor.

[0025] The first sealing interface 222 can be formed between the housing 110 and an extension 230 of the first sealing sleeve 216, which is located radially inward from the end winding 228. In more detail, the first sealing interface 222 can include a groove 231 for receiving a seal 233, such as an O-ring, a gasket, a diamond seal, a liquid seal, and / or other suitable types of seals. The extension 230 of the first sealing sleeve 216 can taper axially inward, which can increase the strength of the sleeve compared to forming a thinner-walled shoulder.

[0026] The first sealing ring 214 includes a flange 232 extending axially outward from the first axial side 218 of the stator 106. The flange 232 is sealed with the inner surface 234 of the first sealing sleeve 216 to form a second sealing interface 224. The second sealing interface 224 can specifically form a radial sealing interface. Therefore, at the second sealing interface 224, the flange 232 and the inner surface 234 of the first sealing sleeve 216 can achieve a firm seal. However, in other examples, other types of sealing interfaces can also be used. The inner surface 234 of the first sealing sleeve 216 may include a groove 236, and the size of the groove can be used to receive a seal 238, such as an O-ring, a button hole, a liquid seal and / or other suitable types of seals.

[0027] In one example, the second sealing interface 224 can be disposed radially inward from the stator end windings 228, but radially outward from the first sealing interface 222. In this way, the sealed cavity 226 can be securely sealed to provide a coolant enclosure for the end windings 228. The coolant 239 circulates around the cavity, and particularly through the end windings 228, which can increase the stator cooling effect compared to a system that directs the coolant only around the end windings 228.

[0028] In one example, the housing 110 can be composed of different parts connected to each other. For example, the crown side portion 240 and the weld side portion 242 can be connected to the housing body 244. The housing 244 can circumferentially surround the stator 106 and the sealing sleeve tube and the sealing ring in the cooling system 200. Fasteners 246 and / or other suitable connecting devices can be used to connect the crown side portion 240 and / or the weld side portion 242 to the housing 244.

[0029] The first sealing sleeve 216 may include a radial inner wall 248, a radial outer wall 250, and an axial wall 252, so that the sealing cavity 226 can enclose the end winding 228. However, other profiles of the first sealing sleeve 216 may also be used in other examples. For example, the first sealing sleeve may include a curved portion that surrounds the end winding.

[0030] One end 251 of the outer radial wall 250 may be adjacent to or shared with the surface 253 of the outer circumferential portion 706. In this way, the upper portion of the cavity 226 is formed. However, in other examples, other shapes of sealing sleeves and sealing rings may also be used.

[0031] The first sealing sleeve 216 in the second sealing interface 224 includes a shoulder 254 that can adjust the axial extrusion of the sealing assembly. In detail, when the sealing assembly is installed in the housing 110 under extrusion, the shoulder 254 is hard mounted on the first sealing ring 214. Arrow 256 represents the extrusion force applied to the assembly between the first sealing ring 214 and the first sealing sleeve 216. In this way, the first sealing ring and the sleeve can be effectively maintained in the desired position. Due to this extrusion connection between the sealing ring and the sleeve in the housing, if necessary, the use of a connecting device that fixes the sealing ring and / or the sleeve to the housing can be avoided. Therefore, compared with a system using fasteners, production efficiency can be improved. This article will introduce the second sealing ring 260 and the second sealing sleeve 262 in more detail, which can be compressed in a similar manner.

[0032] The passage 206 may extend through the stator core 208 from the first axial side 218 to the second axial side 258. In this way, the coolant may pass axially through the stator to effectively remove heat therefrom. Thus, if desired, the motor may achieve higher efficiency than previous motor cooling systems.

[0033] In the illustrated example, the second sealing ring 260 and the second sealing sleeve 262 are located on the second axial side 258 (eg, the crown side) of the stator 106. The second sealing ring 260 may also be configured with the stator seal and integrated in the stator seal. Figure 3-5B The second seal ring 260 and the sleeve are used in the sealing assembly described in order to prevent coolant from leaking into the rotor cavity from a location between the second seal ring 260 and the stator 106. However, in other examples, the second seal ring and the sleeve may be omitted from the motor cooling system.

[0034] Similar to the first sealing ring and sleeve, the second sealing ring 260 and the second sealing sleeve 262 can form a third sealing interface 264 and a fourth sealing interface 266. Similarly, the third sealing interface 264 can be a face seal formed between the housing 110 and the extension 267, and the fourth sealing interface can be a radial seal formed between the flange 269 of the second sealing ring 260. The dimensions of the second sealing ring 260 and the second sealing sleeve 262 can be different from the first sealing ring and the first sealing sleeve to accommodate welds and coronal end windings of different sizes. However, the second sealing ring 260 and the second sealing sleeve 262 can include structural features similar to those in the first sealing ring 214 and the first sealing sleeve 216. However, as described herein, the profile of the second sealing sleeve can accommodate the connection between the electrical interface 112 and the stator end winding 228.

[0035] In one example, the second sealing ring 260 can be bonded to the stator core 208. However, in another example, the second sealing ring can be integrally formed with the stator core 208. The fourth sealing interface 266 can include a seal 277, and the third sealing interface 264 can include a seal 279. The seal 279 can include one or more of an O-ring, a gasket, a diamond seal, and a liquid seal. In addition, the seal 277 can include one or more O-rings, grommets, and liquid seals.

[0036] The second sealing sleeve 262 may include a radially inner wall 268, a radially outer wall 270, and an axial wall 272, such that a sealing cavity 273 can seal the end winding 228. However, other profiles of the second sealing sleeve 262 may be used in other examples.

[0037] The second sealing sleeve 262 further comprises a shoulder 274 which transmits an axial extrusion force so that the axial extrusion force of the sealing assembly formed between the second sealing sleeve 262 and the second sealing ring 260 can be adjusted as required. The axial extrusion force is indicated by an arrow 275 .

[0038] Please see Figure 3 , Figure 3 The sealing assembly 300 of the motor cooling system can be Figure 1 and Figure 2 Embodiments of the cooling system 200 and the motor 100 are provided. The sealing assembly 300 may include a sealing ring 304, which is provided with a sealing ring 308 and is connected to the stator 302. The sealing ring 304 may extend outwardly from the axial side of the stator 302 so that the sealing member 308 can maintain a spacing between the sealing ring and the stator on one side of the sealing assembly 300. In particular, the sealing member 308 may be spaced between the stator end face 302a of the stator 302 and the sealing ring 304. The sealing member 308 is an elastomer. The stator end face 302a has a sealing surface with a width of 2.0 mm, and the sealing member 308 can be mounted on the sealing surface. The sealing assembly 300 may also include a sealing sleeve 306, which extends from an axial side of the sealing ring and surrounds the sealing ring 304 to form a cavity. The stator end winding may be partially immersed in the coolant in the cavity.

[0039] The seal 308 may be Figure 2 The seal 308 may be coupled to the seal ring 304 along the inner diameter (or inner edge) of the seal ring by a coupling element integrated into the seal ring. The coupling element may include a plurality of anchors, a plurality of fixing posts, a raised area, and a recessed area. Figure 4-5B The seal 308 may be aligned with the inner edge of the stator, and a sealing base is provided on the inner edge of the stator to prevent coolant from leaking into the rotor cavity of the motor. The motor may be Figure 1 An embodiment of the electric machine described in . The seal 308 is squeezed by the stator 302 and the sealing sleeve 306 to seal the coolant in the cavity. When the stator 302 and the sealing sleeve 306 are squeezed, the geometry of the seal can achieve a constant sealing pressure and contact width.

[0040] Figure 4 A sealing ring 400 is shown, which is configured with a sealing member 402 and a flange 404 and can be integrated as part of a motor cooling system. The sealing ring 400 can be an embodiment of the sealing ring 304, and the sealing member 402 can be Figure 3 An embodiment of the middle seal 308. The seal ring 400 may include a plurality of channels 406, a plurality of surface grooves 408, a plurality of grooves 410, and a peripheral groove 412.

[0041] A plurality of channels 406 are radially disposed on the sealing ring 400. In particular, the plurality of channels 406 are disposed toward the inner diameter of the sealing ring 400. The plurality of channels 406 are spaced a predetermined distance from the inner diameter of the sealing ring 400. The plurality of channels 406 can be aligned with the stator so that coolant can pass through the plurality of channels 406 and be directed toward the end windings. In one example, the plurality of channels 406 can have a rectangular cross-sectional profile. However, other channel profiles are also contemplated.

[0042] A plurality of surface grooves 408 are radially disposed on the sealing ring 400. One end of each surface groove is close to the outer diameter of the sealing ring 400, and the other end of the surface groove is close to the inner area of ​​the sealing ring 400. More specifically, each surface groove extends from one end close to the outer diameter of the sealing ring 400 to one end of a channel close to the inner area of ​​the sealing ring. Each of the plurality of surface grooves 408 is located between two adjacent channels. Thus, each surface groove is spaced apart and located between two adjacent channels. The peripheral groove is located at the peripheral edge of the sealing ring 400 and is spaced apart from both sides of the sealing ring.

[0043] The plurality of grooves 410 are arranged toward the outer diameter of the sealing ring 400. In addition, one side of the plurality of grooves 410 is spaced apart from the plurality of channels 406 by a predetermined distance, and the other side is spaced apart from the outer diameter of the sealing ring 400 by another predetermined distance. The plurality of grooves 410 are aligned with each channel of the plurality of channels 406, so that each groove is spaced apart from and aligned with a channel. The plurality of grooves 410 are spaced apart from each other by a surface groove. In this way, one groove is spaced apart from another groove and is surrounded by a surface groove on both sides of each groove.

[0044] Figure 5A and Figure 5B Different views of a sealing ring 400 configured with a seal 402 are depicted. Figure 5AA top view 500 of a portion of the sealing ring 400 is specifically shown. Figure 5B Specifically shown is a cross-sectional view 501 of a portion of a seal assembly. Figure 5A and Figure 5B The sealing ring 400 is shown in FIG. 4 . The sealing ring 400 includes the same Figure 4 Similarly, a plurality of channels 406, a plurality of surface grooves 408, and a plurality of grooves 410 are shown. More specifically, the figure depicts a first channel 406a, a second channel 406b, and a third channel 406c in the plurality of channels 406. In addition, a first surface groove 408a, a second surface groove 408b, and a third surface groove 408c in the plurality of surface grooves 408 are also depicted. In addition, a first groove 410a, a second groove 410b, and a third groove 410c in the plurality of grooves 410 are also depicted.

[0045] The portion of the seal ring 400 also includes a raised area 504 and a recessed area 506. The raised area 504 is located near the outer diameter of the seal ring 400 and is configured with a plurality of anchors 514, such as a first anchor 514a, a second anchor 514b, and a third anchor 514c, to prevent the seal 402 from being squeezed out. The recessed area 506 is located near the inner diameter of the seal ring 400. A plurality of fixing posts 516, including a first fixing post 516a, a second fixing post 516b, and a third fixing post 516c, are located in the recessed area of ​​the seal ring 400 for connecting the seal 402 to the seal ring 400. The seal 402 is integrated along the inner edge of the seal ring 400 and extends from the inner diameter to the raised area 504 of the seal ring.

[0046] The sealing ring 400 is configured such that each anchor has a rounded triangular portion and a rectangular portion adjacent to the rounded triangular portion. Each anchor is located at a boundary between a respective convex portion and a respective concave portion. For example, each of the first anchor 514a, the second anchor 514b, and the third anchor 514c is configured with a rounded triangular portion and a rectangular portion adjacent to the rounded triangular portion. The plurality of anchors 514 are designed to prevent the sealing member 402 from being squeezed out. In addition, the first anchor 514a, the second anchor 514b, and the third anchor 514c are all located at a boundary between a convex portion and a concave portion. In particular, the first anchor 514a may be located at the first boundary 502a, the second anchor 514b may be located at the second boundary 502b, and the third anchor 514c may be located at the third boundary 502c between the convex region 504 and the concave region 506.

[0047] The plurality of surface grooves 408 and the plurality of grooves 410 are located in the raised region 504 of the seal ring 400. In particular, the first surface groove 408a, the second surface groove 408b, and the third surface groove 408c are located in the raised region 504 and extend from the outer edge of the seal ring 400 to the inner region of the seal ring 400. The plurality of surface grooves 408 are aligned with the plurality of anchors 514 and the plurality of retaining posts 516. The plurality of retaining posts 516 are located in the recessed region such that the center of each retaining post is located between the inner diameter of the seal ring 400 and the respective anchor. For example, the center of the first retaining post 516a may be located between the inner diameter of the seal ring 400 and the first anchor 514a, the center of the second retaining post 516b may be located between the inner diameter of the seal ring 400 and the second anchor 514b, and the center of the third retaining post 516c may be located between the inner diameter of the seal ring 400 and the third anchor 514c.

[0048] The plurality of surface grooves 408 may be spaced apart from the plurality of anchors 514 by a first predetermined distance, and the plurality of anchors may be spaced apart from the plurality of retaining posts 516 by a second predetermined distance. For example, the first surface groove 408a may be spaced apart from the first anchor 514a by a first predetermined distance, and the first anchor may be spaced apart from the first retaining post 516a by a second predetermined distance. The second surface groove 408b may be spaced apart from the second anchor 514b by a first predetermined distance, and the second anchor may be spaced apart from the second retaining post 516b by a second predetermined distance. The third surface groove 408c may be spaced apart from the third anchor 514c by a first predetermined distance, and the third anchor may be spaced apart from the third retaining post 516c by a second predetermined distance.

[0049] look Figure 5B , the cross section of the seal 402 includes a first portion 402a, a second portion 402b, and a third portion 402c. The first portion 402a of the seal 402 extends from the center of the fixed column to the anchor, and the second portion 402b of the seal extends from the center of the fixed column to the inside 510 of the inner diameter (or inner edge) of the seal ring. The third portion 402c extends from the inner portion 510 of the inner diameter (or inner edge) of the seal ring.

[0050] The shape of the first portion 402a of the seal 402 is determined by the portion of the raised area 504 including the anchor and the center of the retaining post located in the recessed area 506. Similarly, the shape of the second portion 402b of the seal 402 is determined by the inner portion 510 of the seal ring inner diameter (or inner edge) and the center of the retaining post. The shape of the third portion 402c of the seal 402 is determined by the portion of the recessed area 506 including the inner portion 510 of the seal ring inner diameter (or inner edge) and the outer portion 512 of the seal ring inner diameter (or inner edge).

[0051] For example, the first portion 402a of the seal 402 extends from the center of the first fixing post 516a to the first anchor 514a. The second portion 402b of the seal 402 extends from the inside 510 of the inner diameter (or inner edge) to the center of the first fixing post 516a. The third portion 402c of the seal 402 extends from the inside 510 of the inner diameter (or inner edge) to the outside 512 of the inner diameter (or inner edge). In this way, the shapes of the first portion 402a, the second portion 402b, and the third portion 402c of the seal 402 are determined by the shape of the sealing ring 400.

[0052] More specifically, the shape of the first portion 402a of the seal ring 402 is determined by the portion of the raised area 504 including the first anchor 514a and the center of the first fixing post 516a in the recessed area 506. Similarly, the shape of the second portion 402b of the seal 402 is determined by the inner portion 510 of the inner diameter (or inner edge) of the seal ring and the center of the first fixing post 516a. The shape of the third portion 402c of the seal 402 is determined by the inner portion 510 of the inner diameter (or inner edge) of the seal ring and the outer portion 512 of the inner diameter (or inner edge) of the seal ring 400.

[0053] The first portion 402a of the seal 402 is located on the side of each fixing post closest to the outer diameter (or outer edge) of the seal ring, and its height is greater than the height of the second portion 402b of the seal located on the other side of each fixing post closest to the inner side 510 of the inner diameter. The third portion 402c of the seal is located on the outer portion 512 of the inner diameter (or inner edge) of the seal ring 400, and its height is greater than the height of the second portion 402b of the seal, and the second portion 402b is located on the side of each fixing post closest to the inner portion 510 of the inner diameter. The height of the third portion 402c is greater than the height of the second portion 402b because the outer portion 512 of the inner diameter (inner edge) of the seal ring is vertically inclined relative to the inner portion 510 of the inner diameter (inner edge) of the seal ring 400.

[0054] For example, the first portion 402a of the seal 402 is located on the side of the first fixing column 516a closest to the outer diameter (or outer edge) of the seal ring, and its height is greater than the height of the second portion 402b of the seal located on the other side of the first fixing column 516a closest to the inner side 510 of the inner diameter. The third portion 402c of the seal ring 402 is located on the outer side 512 of the inner diameter (or inner edge) of the seal ring 400, and its height is greater than the height of the second portion 402b of the seal ring, which is located on the side of the first fixing column 516a closest to the inner side 510 of the inner diameter.

[0055] The technical effect of integrating the stator seal into the sealing ring of the motor cooling system is that the stator end winding can be cooled in the sealed cavity, thereby reducing (e.g. avoiding) the chance of coolant leaking from the interface between the stator and the sealing ring into the rotor cavity, thereby improving the motor efficiency.

[0056] Figure 1-5B Except for the components depicted schematically, all are drawn approximately to scale. However, in other embodiments, these components may have other relative sizes.

[0057] Figure 1-5B An example configuration of relative positioning of various elements is shown. If the elements shown in the figure are in direct contact or directly coupled to each other, then at least in one example, these elements can be referred to as direct contact or direct coupling, respectively. Similarly, at least in one example, the elements shown as adjacent or adjacent to each other can be adjacent or adjacent to each other, respectively. For example, elements that are in face-to-face contact with each other can be referred to as face-to-face contact elements. Another example is that, at least in one example, elements are placed separately from each other, with only space in the middle and no other elements, which can be referred to as being placed separately from each other. For example, relative to each other, elements displayed above / below each other, relative to both sides of each other, or relative to the left / right side of each other can be referred to as such elements. In addition, as shown in the figure, in at least one example, the topmost element or element point can be referred to as the "top" of the element, and the bottommost element or element point can be referred to as the "bottom" of the element. The top / bottom, upper / lower, upper / lower used in this article can be relative to the vertical axis in the figure to describe the positioning of each element in the figure relative to each other. Therefore, in one example, the element displayed above other elements is vertically positioned above other elements. For another example, the shapes of the elements depicted in the figure may be referred to as having these shapes (such as circular, linear, planar, curved, rounded, chamfered, beveled, or similar shapes). In addition, in one example, elements that are coaxial with each other may be referred to as coaxial elements. In addition, at least in one example, elements that are shown to intersect with each other may be referred to as intersecting elements or intersecting with each other. In addition, in one example, elements that are displayed within another element or displayed outside another element may also be referred to as intersecting elements. In other examples, elements that are offset from each other may also be referred to as such. In addition, elements that are coaxial or parallel to each other may also be referred to as "coaxial elements".

[0058] Note that the control and estimation routine examples included herein can be used for various motor configurations. The control methods and routines disclosed herein may be stored as executable instructions in a non-transitory memory and may be executed by a control system including a controller in conjunction with various sensors, actuators, and other electric drive and / or vehicle hardware and an electronic controller. Thus, the actions, operations, and / or functions described may graphically represent code that will be programmed into a non-transitory memory of a computer-readable storage medium in a vehicle and / or transmission control system. One or more of the actions, operations, and / or functions illustrated may be repeatedly performed depending on the specific strategy used. If desired, one or more of the method steps described herein may be omitted.

[0059] Although various embodiments are described above, it should be understood that these embodiments are merely examples and not limitations. It will be apparent to those familiar with the relevant art that the disclosed subject matter may be embodied in other specific forms without departing from the spirit of the subject matter. Therefore, the embodiments described above should be considered in all respects to be illustrative and not restrictive. Therefore, the configurations and routines disclosed herein are exemplary in nature, and these specific examples should not be considered restrictive, as there may be many variations. The subject matter of the present disclosure includes all novel and non-obvious combinations and sub-combinations of the various systems and configurations, as well as other features, functions, and / or properties disclosed herein.

[0060] The following claims particularly point out certain combinations and subcombinations regarded as novel and non-obvious. The claims may refer to "an" element or a "first" element or the equivalent. The claims should be understood to include one or more such elements, neither requiring nor excluding two or more such elements. Other combinations and subcombinations of the disclosed features, functions, elements, and / or properties may be claimed by amendment of the present claims or by presentation of new claims in this or a related application. Such claims, whether broader, narrower, equal, or different in scope to the original claims, are also deemed to be included in the subject matter of the present disclosure.

Claims

1. Sealing ring for sealing, including: A flange (232) located on one side of the sealing ring (304); a plurality of channels (406), the plurality of channels being radially disposed on the sealing ring; a plurality of grooves (410) aligned with each of the plurality of channels; a plurality of surface grooves (408), wherein each of the plurality of surface grooves is located between two adjacent channels; a raised area (504) proximate the outer diameter of the seal ring and configured with a plurality of anchors (514) for securing the seal (402); a recessed area (506) adjacent the inner diameter of the seal ring; A plurality of fixing posts (516) located in the recessed area; a peripheral groove (412), the peripheral groove being located at the peripheral edge of the sealing ring and between two sides of the sealing ring; as well as The sealing member (402) is integrated along the inner edge of the sealing ring and extends from the inner diameter of the sealing ring to the raised area.

2. The sealing ring of claim 1, wherein the plurality of grooves (410) and the plurality of surface grooves (408) are located in the raised area (504) of the sealing ring (304).

3. The sealing ring of claim 2, wherein the plurality of surface grooves (408) are aligned with the plurality of anchors (514) and the plurality of fixing posts (516).

4. The sealing ring according to claim 2, wherein the plurality of grooves (410) are separated by a surface groove (408).

5. The sealing ring according to claim 1, wherein each of the plurality of anchors (514) is configured with a rounded triangular portion and a rectangular portion adjacent to the rounded triangular portion.

6. The sealing ring of claim 5, wherein each of the plurality of anchors (514) is located at a boundary between the raised region (504) and the recessed region (506).

7. The seal ring of claim 6, wherein the plurality of retaining posts (516) located in the recessed area (506) includes a center of each retaining post located between an inner diameter of the seal ring (304) and each of the plurality of anchors (514).

8. The sealing ring according to claim 7, wherein the height of the first portion (402a) of the sealing member (402) is greater than the height of the second portion (402b) of the sealing member, the first portion (402a) is located on one side of the plurality of fixing columns (516) closest to the outer diameter of the sealing ring (304), and the second portion (402b) is located on the other side of the plurality of fixing columns closest to the inner diameter of the sealing ring (304).

9. The sealing ring according to claim 8, wherein: The third portion (402c) of the seal is located at the outer portion of the inner diameter of the sealing ring (304), and its height is greater than the height of the second portion (402b) of the seal, and the second portion (402b) is located on the side of the multiple fixing columns (516) closest to the inner portion of the inner diameter of the sealing ring.

10. Motor sealing assembly, including: A sealing ring (304), the sealing ring being provided with a sealing member (402) and a flange (404) and being connected to the stator (302), wherein the sealing member is arranged between the sealing ring and the stator at one side of the motor sealing assembly (300) and comprises: The seal is coupled to the seal ring along the inner diameter of the seal ring via a coupling element integrated into the seal ring, the coupling element comprising a plurality of anchors (514), a plurality of fixing posts (516), a raised area (504) and a recessed area (506); and A sealing sleeve (306) extends from one axial side of the sealing ring and surrounds the sealing ring to form a cavity, wherein the stator end winding is at least partially immersed in the coolant in the cavity.

11. The electric machine seal assembly of claim 10, wherein the seal (402) is compressed by the stator (302) and the sealing sleeve (306) to contain a coolant in a cavity.

12. The motor sealing assembly according to claim 10, wherein the sealing member (402) is located between the sealing ring (304) and the stator (302) on one side of the motor sealing assembly (300), including a sealing member located between a stator end surface (302a) of the stator and the sealing ring.

13. The motor seal assembly of claim 12, wherein the stator end face (302a) has a sealing surface with a width of 2.0 mm.

14. The motor seal assembly of claim 10, wherein the motor seal assembly (300) is included in a motor cooling system (200).

15. The motor seal assembly of claim 10, wherein the seal (402) is an elastomer, and the seal has a geometry that enables a constant sealing pressure and contact width.

Images