Motor rotor and automobile

Abstract

A motor rotor (100), comprising: a rotating shaft (101) provided with at least one first liquid outlet (116); the first end plate (103) is arranged on the outer wall of the rotating shaft (101) and is perpendicular to the rotating shaft (101), and an inlet (119) of at least one third flow channel (118) is formed in the first end plate (103); the second end plate (104) is arranged on the outer wall of the rotating shaft (101) and is perpendicular to the rotating shaft (101), and an outlet (121) of at least one third flow channel (118) is formed in the second end plate (104); the plurality of laminations (105) are arranged between the first end plate (103) and the second end plate (104), and at least one second through hole (120) in each of the plurality of laminations (105) forms at least one third flow channel (118). The plurality of laminations (105) on the electrode rotor (100) have the same structure, and the mold cost and the production cost are low.

Description

[0001] This application is a divisional application. The application number of the original application is 202080064892.5, and the original application date is January 15, 2020. The entire contents of the original application are incorporated into this application by reference. Technical Field

[0002] The present application relates to the field of motors, and more particularly, to a motor rotor and a vehicle having the motor rotor. Background Art

[0003] The drive motors of new energy vehicles have the advantages of high power density, high operating efficiency, and a wide speed regulation range, and are therefore widely used in new energy vehicles and other industrial applications.

[0004] In recent years, with the continuous pursuit of high power density and high speed of drive motors in the field of new energy vehicles, the copper loss density of motor windings and the iron loss density of stator and rotor cores are relatively large. Excessive motor temperature can lead to problems such as winding burnout and rotor magnet demagnetization. Therefore, it is necessary to cool down the motor rotor.

[0005] In the conventional technical solution, a plurality of laminations with different structures are nested on the rotor shaft and stacked together to form a flow channel for the coolant. Since the structures of the plurality of laminations nested on the rotor shaft are different, the complexity and implementation cost are increased. Summary of the invention

[0006] The present application provides a motor rotor, wherein the structure of multiple laminations on the electrode rotor is the same, the mold cost and the production cost are relatively low, and the coolant in the single-layer, double-layer, and multi-layer flow channels of the rotor can be used to dissipate heat and reduce temperature.

[0007] In a first aspect, a motor rotor is provided, comprising: a rotating shaft (101) provided with at least one first liquid outlet (116);

[0008] A first end plate (103) is arranged on the outer wall of the rotating shaft (101) and is perpendicular to the rotating shaft (101); the first end plate (103) is provided with at least one inlet (119) of a third flow channel (118); the inlet (119) of the at least one third flow channel (118) is respectively connected to at least one first liquid outlet (116) of the rotating shaft (101); a second end plate (104) is arranged on the outer wall of the rotating shaft (101) and is perpendicular to the rotating shaft (101); the second end plate (104) is provided with at least one outlet (121) of the third flow channel (118) for transferring the liquid to the liquid; The coolant in the third flow channel (118) is discharged, and the coolant enters the at least one third flow channel (118) through the first liquid outlet (116) on the rotating shaft (101), and is discharged through the outlet (121) of the at least one third flow channel (118); a plurality of laminations (105) are arranged between the first end plate (103) and the second end plate (104), and each of the plurality of laminations (105) is provided with at least one second through hole (120), and the at least one second through hole (120) on each lamination constitutes the at least one third flow channel (118).

[0009] In a possible implementation of the first aspect, the coolant in the at least one third flow channel (118) is discharged through an outlet (121) of the at least one third flow channel (118) and then flows into the rotating shaft (101).

[0010] In a possible implementation manner of the first aspect, each of the plurality of laminations (105) is further provided with at least one third through hole (124), and the at least one third through hole (124) on each lamination constitutes at least one fourth flow channel (122);

[0011] The second end plate (104) is also provided with an inlet (126) of at least one fourth flow channel (122), and the inlet (126) of the at least one fourth flow channel (122) is connected to the outlet (121) of the at least one third flow channel (118) on the second end plate (104), and is used for introducing the cooling liquid in the at least one third flow channel (118) into the at least one fourth flow channel (122); the first end plate (103) is also provided with an outlet (123) of the at least one fourth flow channel (122), and is used for discharging the cooling liquid in the at least one fourth flow channel (122), and the cooling liquid enters the at least one fourth flow channel (122) from the at least one third flow channel (118) through the outlet (121) of the at least one third flow channel (118), and is discharged through the outlet (123) of the at least one fourth flow channel (122).

[0012] In another possible implementation of the first aspect, the coolant in the at least one fourth flow channel (122) is discharged through an outlet (123) of the at least one fourth flow channel (122) and then flows into the rotating shaft (101).

[0013] In another possible implementation of the first aspect, each of the plurality of laminates (105) is further provided with at least one fourth through hole (120A), the at least one fourth through hole (120A) on each laminate constituting a fifth flow channel (118A), the second end plate (104) is provided with at least one inlet (119A) of the fifth flow channel (118A), the rotating shaft (101) is further provided with at least one second liquid outlet (125), the inlet (119A) of the at least one fifth flow channel (118A) is respectively connected to the inlet (119A) of the fifth flow channel (118A) on the rotating shaft (101), and the inlet (119A) of the at least one fifth flow channel (118A) is connected to the inlet (119A) of the fifth flow channel (118A) on the rotating shaft (101). The first end plate (103) is connected to at least one second liquid outlet (125) of the rotating shaft (101), and at least one outlet (121A) of the fifth flow channel (118A) is also provided on the first end plate (103). The outlet (121A) of the at least one fifth flow channel (118A) is used to discharge the cooling liquid in the at least one fifth flow channel (118A). The cooling liquid enters the at least one fifth flow channel (118A) through the at least one second liquid outlet (125) on the rotating shaft (101), and is discharged through the outlet (121A) of the at least one fifth flow channel (118A).

[0014] In another possible implementation of the first aspect, the coolant in the at least one fifth flow channel (118A) is discharged through an outlet (121A) of the at least one fifth flow channel (118A) and then flows into the rotating shaft (101).

[0015] In another possible implementation of the first aspect, each of the plurality of laminates (105) is further provided with at least one fifth through hole (124A), the at least one fifth through hole (124A) on each laminate constitutes at least one sixth flow channel (122A), the first end plate (103) is further provided with an inlet (126A) of the at least one sixth flow channel (122A), and the inlet (126A) of the at least one sixth flow channel (122A) is connected to an outlet (118A) of the fifth flow channel (118A) on the first end plate (103).

[0016] (121A) is connected to introduce the cooling liquid in the fifth flow channel (118A) into the at least one sixth flow channel (122A); the second end plate (104) is also provided with at least one outlet (123A) of the sixth flow channel (122A) for discharging the cooling liquid in the at least one sixth flow channel (122A); the cooling liquid enters the at least one sixth flow channel (122A) from the at least one fifth flow channel (118A) through the outlet (121A) of the at least one fifth flow channel (118A) and is discharged through the outlet (123A) of the at least one sixth flow channel (122A).

[0017] In another possible implementation of the first aspect, the coolant in the at least one sixth flow channel (122A) is discharged through an outlet (123A) of the at least one sixth flow channel (122A) and then flows into the rotating shaft (101).

[0018] In another possible implementation of the first aspect, one or more of the following are uniformly distributed around the rotating shaft (101): the at least one third flow channel (118), the inlet (119) of the at least one third flow channel (118), the outlet (121) of the at least one third flow channel (118), the at least one second through hole (120), the at least one third flow channel (118), and the at least one first liquid outlet (116).

[0019] In another possible implementation manner of the first aspect, the invention further includes: a flow distribution device (102) having a hollow structure and being located inside the rotating shaft (101); fixing components (108) are provided at both ends of the outer wall of the flow distribution device (102), and the flow distribution device (102) is connected to both ends of the inner wall of the rotating shaft (101) through the fixing components (108); at least one first through hole (110) is provided on the side wall of the flow distribution device (102); an opening is provided at one end of the flow distribution device (102); a first flow channel (106) is formed between the opening and the at least one first through hole (110); A baffle (107) is provided between the at least one first through hole (110) in the flow distribution device (102) and an end opposite to the first flow channel (106); a second flow channel (109) is formed between the outer wall of the flow distribution device (102) and the inner wall of the rotating shaft (101); the at least one first through hole (110) is used to connect the first flow channel (106) and the second flow channel (109); and the at least one first liquid outlet (116) on the rotating shaft (101) is connected to the second flow channel (109) for discharging the coolant in the second flow channel (109).

[0020] In another possible implementation of the first aspect, at least one first liquid outlet (116) on the rotating shaft (101) is connected to the second flow channel (109) for discharging the coolant in the second flow channel (109); the coolant flows into the second flow channel (109) through the first flow channel (106) in the rotating shaft (101), and flows into the at least one third flow channel (118) through the at least one first liquid outlet (116).

[0021] In another possible implementation manner of the first aspect, the fixing component (108) is an annular protrusion.

[0022] In another possible implementation manner of the first aspect, the fixing assembly (108) further includes a sealing ring (113).

[0023] In another possible implementation of the first aspect, the outer wall of the flow distribution device (102) is provided with a reinforcement component (112), and the reinforcement component (112) is used to connect the outer walls (102) on both sides of the at least one first through hole (110) on the flow distribution device.

[0024] In another possible implementation manner of the first aspect, the reinforcing component (112) is a long strip-shaped protrusion.

[0025] In another possible implementation manner of the first aspect, a spoiler component (114) is further provided on the outer wall of the flow distribution device (102).

[0026] In another possible implementation manner of the first aspect, the spoiler component (114) is a spherical protrusion.

[0027] In another possible implementation of the first aspect, the spoiler component (114) is in a rotating shape.

[0028] In another possible implementation manner of the first aspect, the baffle (107) is located at an end of the flow distribution device (102) opposite to the first flow channel (106).

[0029] In another possible implementation manner of the first aspect, the height of the fixing assembly (108) is adjusted so that the distance between the flow distribution device (102) and the second flow channel (109) is changed.

[0030] In a second aspect, a motor is provided, comprising: a motor stator and a motor rotor as in the first aspect and any possible implementation manner of the first aspect.

[0031] In a third aspect, a power assembly is provided, comprising a motor rotor as in the first aspect and any possible implementation of the first aspect.

[0032] In a fourth aspect, a vehicle is provided, comprising a motor rotor as in the first aspect and any possible implementation of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic structural diagram of a car provided in an embodiment of the present application.

[0034] Figure 2 is a schematic structural diagram of a motor rotor 100 provided in an embodiment of the present application.

[0035] Figure 3 It is a schematic structural diagram of another motor rotor 100 provided in an embodiment of the present application.

[0036] Figure 4 It is a schematic structural diagram of another motor rotor 100 provided in an embodiment of the present application.

[0037] Figure 5 It is a schematic structural diagram of another motor rotor 100 provided in an embodiment of the present application.

[0038] Figure 6 It is a schematic structural diagram of another motor rotor 100 provided in an embodiment of the present application.

[0039] Figure 7 It is a schematic structural diagram of another flow distribution device 102 provided in an embodiment of the present application.

[0040] Figure 8 It is a schematic structural diagram of another flow distribution device 102 provided in an embodiment of the present application.

[0041] Fig. 9 It is a schematic structural diagram of another flow distribution device 102 provided in an embodiment of the present application. DETAILED DESCRIPTION

[0042] The technical solution in this application will be described below in conjunction with the accompanying drawings.

[0043] It should be noted that, in the embodiments of the present application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0044] In addition, it should be noted that in the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0045] Let's combine Figure 1 , describe the structure of the car.

[0046] Figure 1 is a schematic structural diagram of a car provided in an embodiment of the present application. Figure 1 As shown, the vehicle may include: one or more powertrains, a battery pack, and wheels.

[0047] The powertrain can include: motor, electric drive and reducer. Among them, the motor is a device used to realize the mutual conversion of electrical energy and mechanical energy, which consists of two parts: stator and rotor. The motor stator is the stationary part of the motor, which consists of three parts: stator core, stator winding and frame. Its main function is to generate a rotating magnetic field. The motor rotor is the rotating part of the motor. Its main function is to be cut by magnetic lines of force in the rotating magnetic field and then generate (output) current.

[0048] The drive motor of an automobile (for example, a new energy vehicle) has the advantages of high power density, high operating efficiency, and a wide speed regulation range, and is therefore widely used in industrial applications such as new energy vehicles. According to the cooling method of the drive motor, the heat dissipation structure can mainly include an air-cooled structure, a water-cooled structure, and an oil-cooled structure. In recent years, with the continuous pursuit of high power density and high speed of drive motors in the field of new energy vehicles, the copper loss density of the motor windings and the iron loss density of the stator and rotor cores are relatively large. Excessive motor temperature can lead to problems such as winding burnout and rotor magnet demagnetization. Therefore, it is necessary to cool and dissipate the heat of the rotor and stator windings of the motor.

[0049] In the conventional technical solution, a plurality of laminations with different structures are nested on the rotor shaft and stacked together to form a flow channel for the coolant. Since the structures of the plurality of laminations nested on the rotor shaft are different, the complexity and implementation cost are increased.

[0050] A motor rotor provided in an embodiment of the present application can achieve the same structure of multiple laminations on the electrode rotor, with low mold cost and production cost, and can achieve heat dissipation and temperature reduction by coolant in single-layer, double-layer, and multi-layer flow channels of the rotor.

[0051] Combine the following Figure 2 , a motor rotor provided in an embodiment of the present application is described in detail.

[0052] Figure 2 1 is a schematic structural diagram of a motor rotor 100 provided in an embodiment of the present application. Figure 2 As shown, the motor rotor 100 may include: a rotating shaft 101 , a first end plate 103 , a second end plate 104 , and a plurality of laminations 105 .

[0053] The rotating shaft 101 may be a hollow rotating shaft, and one side of the rotating shaft 101 is provided with an opening to facilitate the introduction of the coolant into the rotating shaft 101 .

[0054] The first end plate 103 and the second end plate 104 are arranged on both sides of the outer wall of the rotating shaft 101, perpendicular to the flow direction of the coolant in the rotating shaft 101. A plurality of laminations 105 are stacked together, arranged on the outer wall of the rotating shaft 101, perpendicular to the flow direction of the coolant in the rotating shaft 101, and arranged between the first end plate 103 and the second end plate 104.

[0055] It should be understood that the laminate 105 may be a silicon steel sheet, or may also be a silicon steel sheet, and this application does not make any specific limitation on this.

[0056] At least one first liquid outlet 116 is disposed on the outer wall of the rotating shaft 101, and at least one inlet 119 of a third flow channel 118 is disposed on the first end plate 103. The positions of the inlet 119 of the at least one third flow channel 118 are respectively opposite to the positions of the at least one first liquid outlet 116, so that the coolant enters the rotating shaft 101 and flows into the inlet 119 of the at least one third flow channel 118 on the first end plate 103 through the at least one first liquid outlet 116 on the outer wall of the rotating shaft 101. At least one second through hole 120 is disposed on each of the multiple laminations 105, and the at least one second through hole 120 on each of the multiple laminations 105 is stacked together to form the at least one third flow channel 118. The inlet 119 of at least one third flow channel 118 on the first end plate 103 is respectively connected to at least one third flow channel 118, and is respectively used to introduce the cooling liquid flowing in the rotating shaft 101 into the at least one third flow channel 118 through the at least one first liquid outlet 116 of the rotating shaft 101. The second end plate 104 is provided with an outlet 121 of at least one third flow channel 118, and the outlet 121 of at least one third flow channel 118 is respectively connected to at least one third flow channel 118, and is used to discharge the cooling liquid flowing in the at least one third flow channel 118. The discharged cooling liquid can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through a circulation loop for recycling.

[0057] It should be understood that the at least one mentioned above may be one or more, and this application does not make any specific limitation on this. For the convenience of description, Figure 2 In the description, each of the multiple laminations 105 is provided with a second through hole 120, the multiple laminations 105 are stacked together to form a third flow channel 118, the first end plate 103 is provided with an inlet 119 of the third flow channel 118, and the second end plate 104 is provided with an outlet 121 of the third flow channel 118.

[0058] exist Figure 2 The cooling liquid enters the rotating shaft 101, and is introduced into the inlet 119 of the third flow channel 118 on the first end plate 103 through the first liquid outlet 116 provided on the outer wall of the rotating shaft 101. The cooling liquid enters the third flow channel 118 through the inlet 119 of the third flow channel 118 on the first end plate 103, and is discharged through the outlet 121 of the third flow channel 118 on the second end plate 104. The discharged cooling liquid can be recycled through a circulation loop. Specifically, it can be recycled by flowing into the rotating shaft (101) through the circulation loop.

[0059] Optionally, in some embodiments, the position of the outlet 121 of the third flow channel 118 on the second end plate 104 may be opposite to the position of the stator end winding 117, so that the coolant in the third flow channel 118 can be sprayed on the surface of the stator end winding 117 through the outlet 121 of the third flow channel 118, thereby achieving cooling and heat dissipation of the stator winding through the coolant, and reducing the copper loss density of the motor winding. The coolant sprayed on the surface of the stator end winding 117 can also be recycled through a circulation loop.

[0060] It should be noted that the embodiment of the present application does not specifically limit the opening position of the outlet 121 of the third flow channel 118 on the second end plate 104. The hole may be opened in the second end plate 104 in a direction perpendicular to the flow direction of the coolant in the rotating shaft 101, or may be opened at a certain angle along the flow direction of the coolant in the rotating shaft 101. For example, the opening position of the outlet 121 of the third flow channel 118 on the second end plate 104 may be in a direction oblique to the flow direction of the coolant in the rotating shaft 101 at 45°.

[0061] In the embodiment of the present application, the shapes of the inlet 119 of at least one third flow channel 118 on the first end plate 103, the outlet 121 of at least one third flow channel 118 on the second end plate 104, and the at least one second through hole 120 of the plurality of laminations 105 can be different from each other, and the present application does not make any specific limitation on this. As long as the coolant flowing in the rotating shaft 101 can flow into at least one third flow channel 118 through the inlet 119 of at least one third flow channel 118, and be discharged through the outlet 121 of at least one third flow channel 118. The discharged coolant can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through a circulation loop for recycling.

[0062] The inlet 119 of at least one third flow channel 118, the outlet 121 of at least one third flow channel 118, and the position of at least one third flow channel 118 formed by at least one second through hole 120 of the plurality of laminates 105 can be distributed around the rotation axis 101. Preferably, the inlet 119 of at least one third flow channel 118, the outlet 121 of at least one third flow channel 118, and the position of at least one third flow channel 118 formed by at least one second through hole 120 of the plurality of laminates 105 can be evenly distributed around the rotation axis 101.

[0063] In the present application, at least one second through hole 120 provided on the plurality of laminates 105 may be a straight through hole or a spiral opening. The cross-sectional shape of the opening may be, for example, a circular hole, an elliptical hole, a diamond hole, a waist-shaped hole, or any other shape or combination of shapes.

[0064] Optionally, in some embodiments, in order to achieve better heat dissipation effect for the motor rotor, bidirectional cross flow of coolant can be implemented in multiple flow channels, thereby achieving better cooling of the rotor through bidirectional cross heat dissipation of coolant in multiple flow channels.

[0065] For example, in the embodiment of the present application, the structures of the first end plate 103 and the second end plate 104 can be the same. During installation, one of the first end plate 103 or the second end plate 104 can be installed on one side of the outer wall of the rotating shaft 101, and the other of the first end plate 103 or the second end plate 104 can be installed in a mirror image on the other side of the outer wall of the rotating shaft 101, and rotated and staggered by a fixed angle.

[0066] exist Figure 2 Based on the embodiment shown in FIG. 1 , each of the plurality of laminates 105 is further provided with at least one fourth through hole 120A. Figure 3 As shown, at least one fourth through hole 120A on each of the plurality of laminations 105 is stacked together to form at least one fifth flow channel 118A. The first end plate 103 is also provided with at least one outlet 121A of the fifth flow channel 118A, and the second end plate 104 is also provided with at least one inlet 119A of the fifth flow channel 118A. The rotating shaft 101 is also provided with at least one second liquid outlet 125, and the at least one second liquid outlet 125 is respectively connected to the inlet 119A of the at least one fifth flow channel 118A on the second end plate 104, so as to introduce the coolant flowing in the rotating shaft 101 into the at least one fifth flow channel 118A.

[0067] For ease of description, Figure 3 In the figure, each of the multiple laminates 105 is provided with a second through hole 120 and a fourth through hole 120A, the second through hole 120 of each laminate 105 in the multiple laminates 105 is stacked together to form a third flow channel 118, the fourth through hole 120A of each laminate 105 in the multiple laminates 105 is stacked together to form a fifth flow channel 118A, the first end plate 103 is provided with an inlet 119 of the third flow channel 118 and an outlet 121A of the fifth flow channel 118A, and the second end plate 104 is provided with an outlet 121 of the third flow channel 118 and an inlet 119A of the fifth flow channel 118A as an example for explanation.

[0068] See also Figure 3 For the first end plate 103, the positional relationship between the inlet 119 of the third flow channel 118 and the outlet 121A of the fifth flow channel 118A provided on the first end plate 103 is not specifically limited in this application. Figure 3In the embodiment, the positions of the inlet 119 of the third flow channel 118 and the outlet 121A of the fifth flow channel 118A on the first end plate 103 can be 180 degrees apart on the first end plate 103. Similarly, for the second end plate 104, the positional relationship between the outlet 121 of the third flow channel 118 and the inlet 119A of the fifth flow channel 118A provided on the second end plate 104 is not specifically limited in this application. For example, Figure 3 In the embodiment, the positions of the outlet 121 of the third flow channel 118 and the inlet 119A of the fifth flow channel 118A provided on the second end plate 104 can be 180 degrees apart on the second end plate 104. For each of the plurality of laminates 105, the positional relationship between the second through hole 120 and the fourth through hole 120A provided on the laminate 105 is not specifically limited in this application. For example, Figure 3 In the embodiment, the positions of the second through hole 120 and the fourth through hole 120A on the laminate 105 may be spaced 180 degrees apart.

[0069] During installation, the second end plate 104 can be rotated by 360 / n=360 / 2=180 degrees. Where n represents the number of openings provided on the first end plate 103 or the second end plate 104. For example, Figure 3 An inlet 119 of the third flow channel 118 and an outlet 121A of the fifth flow channel 118A are disposed on the first end plate 103, where n=2.

[0070] like Figure 3 As shown, a second through hole 120 on each of the multiple laminations 105 is stacked together to form a third flow channel 118, and an inlet 119 of the third flow channel 118 arranged on the first end plate 103 and an outlet 121 of the third flow channel 118 arranged on the second end plate 104 are respectively connected to the third flow channel 118, so as to introduce the coolant from the inlet 119 of the third flow channel 118 and let it flow through the third flow channel 118, and discharge the coolant in the third flow channel 118 through the outlet 121 of the third flow channel 118 arranged on the second end plate 104. The fourth through holes 120A on each of the plurality of laminations 105 are stacked together to form a fifth flow channel 118A. The inlet 119A of the fifth flow channel 118A provided on the second end plate 104 and the at least one second liquid outlet 125 on the rotating shaft 101 are used to introduce the cooling liquid flowing in the rotating shaft 101 into the fifth flow channel 118A through the at least one second liquid outlet 125, and discharge it through the outlet 121A of the fifth flow channel 118A on the first end plate 103. The discharged cooling liquid can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through the circulation loop for recycling.

[0071] exist Figure 3In the embodiment, the cooling liquid can enter the rotating shaft 101 through the opening on one side of the rotating shaft 101. On the one hand, the first liquid outlet 116 provided on the outer wall of the rotating shaft 101 introduces the cooling liquid in the rotating shaft 101 into the inlet 119 of the third flow channel 118 on the first end plate 103, and the cooling liquid in the rotating shaft 101 enters the third flow channel 118 through the inlet 119 of the third flow channel 118 on the first end plate 103, and is discharged through the outlet 121 of the third flow channel 118 on the second end plate 104. On the other hand, at least one second liquid outlet 125 provided on the outer wall of the rotating shaft 101 introduces the cooling liquid in the rotating shaft 101 into the inlet 119A of the fifth flow channel 118A on the second end plate 104, enters the fifth flow channel 118A, and is discharged through the outlet 121A of the fifth flow channel 118A on the first end plate 103. The discharged cooling liquid can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through a circulation loop for recycling.

[0072] In the present application, Figure 2 In the embodiment shown, the structures of the first end plate 103 and the second end plate 104 are set to be the same, so as to realize multiple flow channels, and realize two-way cross heat dissipation in the multiple flow channels, which has a good heat dissipation effect on the rotor. In addition, the structures of the first end plate 103 and the second end plate 104 are the same, the mold cost and the production cost are low, and it is easy to realize.

[0073] Optionally, in some embodiments, the position of the outlet 121 of the third flow channel 118 on the second end plate 104 and the position of the outlet 121A of the fifth flow channel 118A on the first end plate 103 can be respectively opposite to the positions of the stator end windings 117 at both ends, so that the outlet 121 of the third flow channel 118 can spray the coolant in the third flow channel 118 on the surface of the stator end windings 117 at both ends, or the outlet 121A of the fifth flow channel 118A can spray the coolant in the fifth flow channel 118A on the surface of the stator end windings 117 at both ends, thereby achieving cooling and heat dissipation of the stator windings and reducing the copper loss density of the motor windings. The coolant sprayed on the surface of the stator end windings 117 can also be recycled through a circulation loop.

[0074] Optionally, in some embodiments, each of the plurality of laminates 105 may be provided with multiple layers of openings, for example Figure 4 , the first layer openings on each laminate 105 include at least one second through hole 120. The second layer openings on each laminate 105 include at least one third through hole 124. And so on. The at least one second through hole 120 is used to form at least one third flow channel 118, and the at least one third through hole 124 is connected together to form at least one fourth flow channel 122. And so on.

[0075] like Figure 4As shown, n inlets 119 of the third flow channels 118 may be provided on the first end plate 103, wherein n is a positive integer greater than or equal to 2. The coolant enters the at least one third flow channel 118 and the at least one fourth flow channel 122 through the at least one first liquid outlet 116 on the outer wall of the rotating shaft 101. The coolant may flow in one direction in the at least one third flow channel 118 and the at least one fourth flow channel 122, or may flow in two directions in the at least one third flow channel 118 and the at least one fourth flow channel 122.

[0076] For a possible implementation, see Figure 4 The second end plate 104 is also provided with an inlet 126 of at least one fourth flow channel 122, which is connected to the outlet 121 of at least one third flow channel 118 on the second end plate 104, and is used to allow the coolant of at least one third flow channel 118 to flow to at least one fourth flow channel 122 through the outlet 121 of at least one third flow channel 118. The coolant enters the inlet 119 of at least one third flow channel 118 from the at least one first liquid outlet 116 on the outer wall of the rotating shaft 101, and enters the at least one third flow channel 118 through the inlet 119 of the at least one third flow channel 118. The coolant enters the inlet 126 of at least one fourth flow channel 122 connected thereto through the outlet 121 of at least one third flow channel 118, and enters the at least one fourth flow channel 122. The first end plate 103 is also provided with at least one outlet 123 of the fourth flow channel 122, and is respectively connected to the at least one fourth flow channel 122, and is used to discharge the coolant in the at least one fourth flow channel 122. The discharged coolant can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through the circulation loop for recycling.

[0077] It should be noted that in the embodiment of the present application, the inlet 126 of the fourth flow channel 122 on the second end plate 104 can also be the same as the outlet 121 of the third flow channel 118. In other words, if the outlet 121 of the third flow channel 118 is provided on the second end plate 104, the outlet 121 of the third flow channel 118 can also serve as the inlet of the fourth flow channel 122. If the inlet 126 of the fourth flow channel 122 is provided on the second end plate 104, the inlet 126 of the fourth flow channel 122 can also serve as the outlet of the third flow channel 118.

[0078] In another possible implementation, the inlet 119 of at least one third flow channel 118 and the outlet 123 of at least one fourth flow channel 122 on the first end plate 103 are respectively connected to the at least one first liquid outlet 116 on the outer wall of the rotating shaft 101, so that the cooling liquid enters the inlet 119 of at least one third flow channel 118 and the outlet 123 of at least one fourth flow channel 122 from the at least one first liquid outlet 116 on the outer wall of the rotating shaft 101. On the one hand, the cooling liquid can enter the at least one fourth flow channel 122 through the outlet 123 of at least one fourth flow channel 122, and be discharged through the inlet 126 of the fourth flow channel 122 connected to the at least one fourth flow channel 122. On the other hand, the cooling liquid can enter the at least one third flow channel 118 through the inlet 119 of at least one third flow channel 118, and be discharged through the outlet 121 of at least one third flow channel 118 connected to the at least one third flow channel 118. The discharged cooling liquid can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through a circulation loop for recycling.

[0079] Optionally, the position of the outlet 123 of the fourth flow channel 122 on the first end plate 103 is opposite to the position of the stator end winding 117, so that the outlet 123 of the fourth flow channel 122 sprays the coolant in the fourth flow channel 122 on the surface of the stator end winding 117, thereby cooling and dissipating the stator winding through the coolant sprayed from the outlet 123 of the fourth flow channel 122, thereby reducing the copper loss density of the motor winding. The coolant sprayed on the surface of the stator end winding 117 can also be recycled through a circulation loop.

[0080] Optionally, in Figure 4 In the embodiment of the present invention, the structures of the first end plate 103 and the second end plate 104 may also be the same. Figure 5 Each of the plurality of laminates 105 is also provided with at least one fourth through hole 120A, and the at least one fourth through hole 120A of each of the plurality of laminates 105 is stacked together to form at least one fifth flow channel 118A. Each of the plurality of laminates 105 is also provided with at least one fifth through hole 124A, and the at least one fifth through hole 124A of each of the plurality of laminates 105 is stacked together to form at least one sixth flow channel 122A.

[0081] The second end plate 104 is also provided with an inlet 119A of at least one fifth flow channel 118A, and the first end plate 103 is also provided with an outlet 121A of at least one fifth flow channel 118A. The inlet 119A of at least one fifth flow channel 118A and the outlet 121A of at least one fifth flow channel 118A are respectively connected to the at least one fifth flow channel 118A. The inlet 119A of at least one fifth flow channel 118A on the second end plate 104 can introduce the coolant in the rotating shaft 101 through at least one second liquid outlet 125 provided on the outer wall of the rotating shaft 101 and flow through the at least one fifth flow channel 118A. The first end plate 103 is also provided with an inlet 126A of at least one sixth flow channel 122A, and the second end plate 104 is also provided with an outlet 123A of at least one sixth flow channel 122A, wherein the inlet 126A of at least one sixth flow channel 122A is connected to the outlet 121A of at least one fifth flow channel 118A on the first end plate 103, and is used to allow the coolant of at least one fifth flow channel 118A to flow to at least one sixth flow channel 122A through the outlet 121A of at least one fifth flow channel 118A. The outlet 123A of at least one sixth flow channel 122A on the second end plate 104 is used to discharge the coolant in at least one sixth flow channel 122A. The discharged coolant can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through a circulation loop for recycling.

[0082] It should be noted that in the embodiment of the present application, the inlet 126A of the sixth flow channel 122A on the first end plate 103 may also be the same as the outlet 121A of the fifth flow channel 118A. That is to say, if the first end plate 103 is provided with an outlet 121A of the fifth flow channel 118A, the outlet 121A of the fifth flow channel 118A may also serve as the inlet of the sixth flow channel 122A. If the first end plate 103 is provided with an inlet 126A of the sixth flow channel 122A, the inlet 126A of the sixth flow channel 122A may also serve as the outlet of the fifth flow channel 118A.

[0083] It should also be noted that, in the above embodiment, each of the plurality of laminates 105 may be provided with multiple layers of openings. Figure 5 In the description, an example is taken in which two layers of openings are provided on each of the plurality of laminates 105 , the first layer of openings includes three second through holes 120 and three fourth through holes 120A, and the second layer of openings includes three third through holes 124 and three fifth through holes 124A.

[0084] For details, see Figure 5, n inlets 119 may be provided on the first end plate 103, wherein n is a positive integer greater than or equal to 2. The coolant enters the at least one fifth flow channel 118A and the at least one sixth flow channel 122A through the at least one second liquid outlet 125 provided on the outer wall of the rotating shaft 101. The coolant may flow in one direction in the at least one fifth flow channel 118A and the at least one sixth flow channel 122A, or may flow in two directions in the at least one fifth flow channel 118A and the at least one sixth flow channel 122A.

[0085] For ease of description, Figure 5 In the example, the first end plate 103 is provided with three inlets 119 of the third flow channel 118, three outlets 121A of the fifth flow channel 118A, three outlets 123 of the fourth flow channel 122, and three inlets 126A of the sixth flow channel 122A. The second end plate 104 has the same structure as the first end plate 103, and is also provided with three inlets 119A of the fifth flow channel 118A, three outlets 121 of the third flow channel 118, three outlets 123A of the sixth flow channel 122A, and three inlets 126 of the fourth flow channel 122.

[0086] Among them, the positional relationship between the inlets 119 of the three third flow channels 118 provided on the first end plate 103, the positional relationship between the outlets 121A of the three fifth flow channels 118A, the positional relationship between the outlets 123 of the three fourth flow channels 122, and the positional relationship between the inlets 126A of the three sixth flow channels 122A are not specifically limited in this application. Similarly, the positional relationship between the inlets 119A of the three fifth flow channels 118A provided on the second end plate 104, the positional relationship between the outlets 121 of the three third flow channels 118, the positional relationship between the outlets 123A of the three sixth flow channels 122A, and the positional relationship between the inlets 126 of the three fourth flow channels 122 are not specifically limited. Preferably, the above can be evenly distributed around the rotating shaft 101. For example, the inlets 119 of the three third flow channels 118 on the first end plate 103 are spaced 120 degrees apart. Similarly, the outlets 121A of the three fifth flow channels 118A are also spaced 120 degrees apart, the outlets 123 of the three fourth flow channels 122 are also spaced 120 degrees apart, and the inlets 126A of the three sixth flow channels 122A are spaced 120 degrees apart. The second end plate 104 has the same structure as the first end plate 103, which will not be described here. During installation, the second end plate 104 can be rotated 360 / n=360 / 6=60 degrees to be mirror-mounted with the first end plate 103. Alternatively, the first end plate 103 can be rotated 360 / n=360 / 6=60 degrees to be mirror-mounted with the second end plate 104.

[0087] exist Figure 5In the embodiment, the coolant can enter the rotating shaft 101. On the one hand, the coolant in the rotating shaft 101 can be introduced into the inlet 119 of the third flow channel 118 on the first end plate 103 through the first liquid outlet 116 provided on the outer wall of the rotating shaft 101. The coolant enters the third flow channel 118 through the inlet 119 of the third flow channel 118 on the first end plate 103, and flows into the fourth flow channel 122 through the inlet (126) of the fourth flow channel 122 connected to the outlet 121 of the third flow channel 118 on the second end plate 104, and then is discharged through the outlet 123 of the fourth flow channel 122 on the first end plate 103. On the other hand, the coolant in the rotating shaft 101 can also be introduced into the inlet 119A of the fifth flow channel 118A on the second end plate 104 through the second liquid outlet 125 provided on the outer wall of the rotating shaft 101. The coolant enters the fifth flow channel 118A through the inlet 119A of the fifth flow channel 118A on the second end plate 104, flows into the sixth flow channel 122A through the inlet (126A) of the sixth flow channel 122A on the first end plate 103 that is connected to the outlet 121A of the fifth flow channel 118A, and is discharged through the outlet 123A of the sixth flow channel 122A on the second end plate 104. The discharged coolant can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through the circulation loop for recycling.

[0088] In the above scheme, a multi-layer flow channel can be implemented in a plurality of laminates, so as to cool the laminates by means of the coolant in the multi-layer flow channel, and the heat dissipation effect is better.

[0089] Optionally, in some embodiments, on the one hand, the rotor can be cooled and dissipated by convection heat exchange between the inner wall of the rotor shaft and the coolant. Since the hot spot area of ​​the rotor is usually located in the axial center part, the coolant needs to be preferentially transported to the corresponding specific area in the rotor shaft. On the other hand, the coolant can also be sprayed on the end windings on both sides of the motor stator through the rotor through the rotational motion of the rotor, thereby achieving heat dissipation and cooling of the stator winding. This method requires that the coolant entering the rotor be stably and effectively distributed to both ends of the rotor inside the rotor.

[0090] Since the rotation speed of the rotor itself and the flow rate of the coolant span a large range, different rotor rotation speeds and different coolant flow rates will affect the flow distribution of the coolant. In order to achieve the delivery of coolant to a specific area in the rotor shaft cavity and the stable flow distribution to both ends of the rotor, the embodiment of the present application provides a flow distribution device, which can effectively deliver the coolant entering the shaft to a specific axial position of the shaft, and then achieve stable flow distribution of the coolant to both ends of the rotor under the action of the centrifugal force of the shaft. Solve the problem of cooling and dissipating the rotor and stator windings of the motor, especially the over-temperature problem of the stator windings and rotor magnets of the electric vehicle powertrain under specific working conditions.

[0091] Combine the following Figure 6 , another motor rotor provided in an embodiment of the present application is described in detail.

[0092] Figure 6 1 is a schematic structural diagram of a motor rotor 100 provided in an embodiment of the present application. Figure 6 As shown, the motor rotor 100 may include: a rotating shaft 101 , a flow distribution device 102 , a first end plate 103 , a second end plate 104 , and a plurality of laminations 105 .

[0093] Flow distribution device 102 see Figure 6 The flow distribution device 102 is embedded in the inner cavity of the rotating shaft 101 and moves with the rotating shaft 101. Specifically, the flow distribution device 102 is a hollow structure. The embodiment of the present application does not specifically limit the shape of the flow distribution device 102. For example, the flow distribution device 102 can be a hollow cylinder, or the flow distribution device 102 can also be other hollow three-dimensional structures.

[0094] The flow distribution device 102 is fixed on the inner wall of the rotating shaft 101. Specifically, the flow distribution device 102 is provided with fixing components 108 at both ends of the outer wall of the rotating shaft 101, which are used to fix the flow distribution device 102 on the inner walls of the inner cavity of the rotating shaft 101 through the fixing components 108 at both ends of the outer wall.

[0095] At least one first through hole 110 is axially arranged on the outer wall of the flow distribution device 102, and the at least one first through hole 110 is respectively connected to the first flow channel 106 and the second flow channel 109, and is used to connect the first flow channel 106 and the second flow channel 109. The embodiment of the present application does not limit the specific position of the at least one first through hole 110 arranged on the flow distribution device 102, and the opening position of the at least one first through hole 110 on the hollow shaft structure wall surface of the flow distribution device 102 can be adjusted, so as to realize the effective delivery of the coolant to the axial specific position of the rotating shaft 101.

[0096] A second flow channel 109 is formed between the outer wall of the flow distribution device 102 and the inner wall of the rotating shaft 101. An opening is provided at one end of the flow distribution device 102 fixed to the inner wall of the rotating shaft 101, and the first flow channel 106 is formed between the opening and at least one first through hole 110. A baffle (107) is provided between at least one first through hole (110) and an end opposite to the first flow channel (106) in the flow distribution device 102, and the baffle 107 is used to prevent the coolant in the first flow channel 106 from flowing out of the flow distribution device 102. In a possible implementation, the baffle (107) is located at the end of the flow distribution device (102) opposite to the first flow channel (106).

[0097] The embodiment of the present application does not specifically limit the specific shape of the fixing components 108 on the two ends of the outer wall of the flow distribution device 102 along the axial direction of the rotating shaft 101, as long as the fixation or sealing between the two ends of the outer wall of the flow distribution device 102 and the inner walls on both sides of the inner cavity of the rotating shaft 101 can be achieved.

[0098] Optionally, in a possible implementation, the fixing component 108 is an annular protrusion on both ends of the outer wall of the flow distribution device 102, and the outer wall surface of the annular protrusion and the inner cavity wall surface of the rotating shaft 101 are interference fit to achieve sealing and axial fixation between the two ends of the outer wall of the flow distribution device 102 and the two ends of the inner cavity wall surface of the rotating shaft 101.

[0099] Optionally, in another possible implementation, the fixing assembly 108 is an annular protrusion and a sealing ring on both ends of the outer wall of the flow distribution device 102. For example, see Figure 7 A groove is provided in the annular protrusion 108 on both ends of the outer wall of the flow distribution device 102, and a sealing ring 113 is provided in the groove. The outer wall surface of the annular protrusion 108 and the sealing ring 113 in the groove are interference fit with the inner cavity wall surface of the rotating shaft 101 to achieve sealing and axial fixation between the two ends of the outer wall of the flow distribution device 102 and the two ends of the inner cavity wall surface of the rotating shaft 101.

[0100] Optionally, the embodiment of the present application does not specifically limit the inner diameter, outer diameter and wall thickness of the flow distribution device 102, and the radial space size of the first flow channel 106 and / or the second flow channel 109 can be adjusted according to actual needs. As an example, the radial space size of the first flow channel 106 can be increased to increase the flow rate of the coolant entering the rotating shaft 101. As an example, the radial space size of the second flow channel 109 can also be reduced to increase the coverage area between the coolant entering the rotating shaft 101 and the inner wall surface of the rotating shaft 101, enhance the convective heat exchange of the rotating shaft 101, and improve the effect of cooling and dissipating the heat of the rotating shaft 101.

[0101] In the embodiment of the present application, the coolant can enter the first flow channel 106 from the coolant inlet channel, and enter the second flow channel 109 through at least one first through hole 110 axially arranged on the outer wall of the flow distribution device 102. The coolant entering the rotating shaft 101 can be transported to a specific axial position of the rotating shaft 101, and then the coolant can be stably distributed to both ends of the rotor 100 under the centrifugal force of the rotating shaft 101, thereby solving the problem of cooling and dissipating the rotor of the motor.

[0102] Optionally, the at least one first through hole 110 axially arranged on the outer wall of the flow distribution device 102 may be evenly distributed around the rotating shaft 101 .

[0103] Optionally, in some embodiments, an axial fixing part 111 is provided at the other end of the rotating shaft 101 opposite to the end where the opening is provided and the first flow channel 106 is formed, so as to axially fix the flow distribution device 102 located in the rotating shaft 101 .

[0104] The embodiment of the present application does not specifically limit the fixing part 111, as long as it can prevent the coolant entering the flow distribution device 102 from flowing out. In a possible implementation, the fixing part 111 can be a baffle.

[0105] The embodiment of the present application does not specifically limit the material of the flow distribution device 102. The flow distribution device 102 may be made of plastic, metal, or other materials. The embodiment of the present application may process the flow distribution device 102 through a mold to achieve low-cost production.

[0106] It should be noted that the embodiment of the present application does not specifically limit the coolant entering the first flow channel 106 and the second flow channel 109, and it can be water, or oil, or other chemical solutions used for cooling.

[0107] Optionally, in some embodiments, the height of the fixing assembly 108 provided at both ends of the outer wall of the flow distribution device 102 along the axial direction of the rotating shaft 101 can also be adjusted, thereby adjusting the distance between the inner wall of the rotating shaft 101 and the outer wall of the flow distribution device 102 to adjust the ratio of the coolant at both ends of the rotating shaft 101 entering the second flow channel 109.

[0108] Optionally, in some embodiments, a reinforcement component may be further provided on the outer wall surface of the flow distribution device 102. The reinforcement component may be used to connect the flow distribution device 102 at both ends of at least one first through hole 110, and provide support between the outer wall of the flow distribution device 102 and the inner wall of the rotating shaft 101. This may be used to solve the problem of damage caused by insufficient structural strength of the flow distribution device 102 when the rotor 100 rotates at high speed.

[0109] In a possible implementation, the reinforcement component may be as follows Figure 7 The reinforcement rib 112 shown may be, for example, an elongated protrusion distributed along the axial direction on the flow distribution device 102. Specifically, the direction of the elongated protrusion may be parallel to the axial direction of the rotating shaft 101, or may be at a certain angle to the axial direction of the rotating shaft 101, which is not specifically limited in the present application. Figure 7 In the figure, the reinforcing rib 112 is parallel to the axial direction of the rotating shaft 101 as an example for explanation.

[0110] It should be noted that if Figure 7As shown, grooves are provided on the annular protrusions 108 on both sides of the outer wall of the flow distribution device 102, and sealing rings 113 are provided in the grooves. The outer wall surface of the annular protrusion and the sealing ring 113 in the groove are subjected to interference fit with the inner wall surface of the rotating shaft 101, so as to achieve sealing and axial fixation of the flow distribution device 102 and the inner wall surface of the rotating shaft 101.

[0111] Optionally, in some embodiments, a spoiler assembly may be provided on the outer wall of the flow distribution device 102 to enhance the convection heat exchange between the coolant in the second flow channel 109 and the inner wall of the rotating shaft 101, thereby improving the heat dissipation capacity of the rotor. At the same time, the spoiler assembly may also play a role in strengthening and supporting the flow distribution device 102. For example, in a possible implementation, Figure 8 As shown, the spoiler component provided on the outer wall of the flow distribution device 102 is at least one protrusion 114. The at least one protrusion 114 can enhance the convection heat exchange between the coolant in the second flow channel 109 and the inner wall of the rotating shaft 101, thereby improving the heat dissipation capacity of the rotor.

[0112] In the present application, Figure 8 The shape of the at least one protrusion 114 is not specifically limited, and may be a spherical protrusion or a protrusion of other shapes. Figure 8 In the figure, the protrusion 114 is taken as an example that the protrusion 114 is a spherical protrusion.

[0113] Optionally, in some embodiments, a boost structure may be provided on the outer wall surface of the flow distribution device 102. When the rotating shaft 101 rotates, the boost structure on the flow distribution device 102 is driven to rotate, producing a pumping effect on the coolant in the second flow channel 109. At the same time, the boost structure may also play a role in disturbing the flow, thereby enhancing the convective heat exchange between the coolant in the second flow channel 109 and the inner wall surface of the rotating shaft 101, and improving the heat dissipation capacity of the rotor. In addition, the boost structure also plays a role in strengthening and supporting the flow distribution device 102. Exemplarily, in one possible implementation, such as Fig. 9 As shown, the boost structure is a spiral structure 115 provided on the outer wall surface of the flow distribution device 102. When the rotating shaft 101 rotates, the spiral structure 115 is driven to rotate, producing a pumping effect on the coolant in the second flow channel 109. At the same time, the spiral structure 115 can also enhance the convection heat exchange between the coolant in the second flow channel 109 and the inner wall surface of the rotating shaft 101, as well as the strengthening and supporting effect on the flow distribution device 102.

[0114] Optionally, in some embodiments, Figure 8 The at least one protrusion 114 on the outer wall of the flow distribution device 102 shown can also be arranged according to Fig. 9 Arranged in the spiral shape shown.

[0115] The flow distribution device in the motor rotor shaft cavity provided by the embodiment of the present application has a simple structure and strong versatility, and its size can be flexibly adjusted, and no special processing requirements are required for the shaft. On the one hand, the flow distribution device can enhance the heat dissipation capacity of the rotor, and the cooling effect is better. On the other hand, the flow distribution device can also be injection molded by a mold, which is relatively low in cost.

[0116] The flow distribution device 102 inside the rotating shaft 101 is described above. Figure 6 In the embodiment, the cooling liquid enters the flow distribution device 102 in the rotating shaft 101, and enters the first end plate 103 and / or the second end plate 104 through the flow distribution device 102.

[0117] It should be noted that the coolant enters the flow distribution device 102 in the rotating shaft 101, and enters the first end plate 103 and / or the second end plate 104 through the flow distribution device 102, and the plurality of laminations 105 located between the first end plate 103 and the second end plate 104 may be Figure 2-Figure 5 Any structure in .

[0118] For ease of description, Figure 6 Above Chinese and above Figure 3 The structure shown in the figure is illustrated by the first end plate 103, the second end plate 104, and the plurality of laminations 105.

[0119] See also Figure 6 On the one hand, the coolant in the second flow channel 109 flows into the inlet 119 of the third flow channel 118 on the first end plate 103 through the first liquid outlet 116 provided on the outer wall of the rotating shaft 101, enters the third flow channel 118 through the inlet 119 of the third flow channel 118 on the first end plate 103, and is discharged through the outlet 121 of the third flow channel 118 on the second end plate 104. On the other hand, the coolant in the second flow channel 109 flows into the inlet 119A of the fifth flow channel 118A on the second end plate 104 through the second liquid outlet 125 provided on the outer wall of the rotating shaft 101, enters the fifth flow channel 118A, and is discharged through the outlet 121A of the fifth flow channel 118A on the first end plate 103. The discharged coolant can be recycled through a circulation loop. Specifically, it can flow into the rotating shaft (101) through a circulation loop for recycling.

[0120] The position of the outlet 121 of the third flow channel 118 on the second end plate 104 and the position of the outlet 121A of the fifth flow channel 118A on the first end plate 103 can be respectively opposite to the positions of the end windings 117 at both ends of the stator, so that the outlet 121 of the third flow channel 118 can spray the coolant in the third flow channel 118 on the surface of the end windings 117 at both ends of the stator, or the outlet 121A of the fifth flow channel 118A can spray the coolant in the fifth flow channel 118A on the surface of the end windings 117 at both ends of the stator, thereby achieving cooling and heat dissipation of the stator winding and reducing the copper loss density of the motor winding.

[0121] The embodiment of the present application also provides a motor, including a motor stator and a motor rotor. The motor rotor can be any one of the above-described ones, so as to achieve cooling and heat dissipation of the motor stator winding and reduce the copper loss density of the motor winding. For the specific description of the motor rotor, please refer to the above description, which will not be repeated here.

[0122] The embodiment of the present application further provides a powertrain, including a motor. The powertrain may also include: an electric drive and a reducer. For details, please refer to the above description, which will not be repeated here.

[0123] The embodiment of the present application further provides a car, including one or more power assemblies, and the car may also include: a battery pack and wheels.

[0124] In this application, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b, or c can be represented by: a, b, c, ab, ac, bc, or abc, where a, b, c can be single or multiple.

[0125] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A motor, characterized in that: The motor comprises a motor rotor and a motor stator, wherein the motor rotor comprises a rotating shaft, a first end plate, a second end plate and a plurality of laminations, wherein the plurality of laminations are stacked together and arranged between the first end plate and the second end plate, wherein: The rotating shaft is a hollow rotating shaft, one side of the rotating shaft is provided with an opening to facilitate the introduction of cooling liquid into the rotating shaft, and the outer wall of the rotating shaft is provided with a plurality of liquid outlets, the plurality of liquid outlets including at least one first liquid outlet and at least one second liquid outlet; A plurality of through holes are provided on each of the plurality of laminations, and the plurality of laminations are stacked together to form a plurality of flow channels, the plurality of flow channels comprising at least one third flow channel, at least one fourth flow channel and at least one fifth flow channel, the flow direction of the coolant in the at least one third flow channel being the same as that in the at least one fourth flow channel and being opposite to that in the at least one fifth flow channel; The first end plate is provided with at least one inlet of the third flow channel and at least one outlet of the fifth flow channel, the inlet of the at least one third flow channel is located opposite to the at least one first liquid outlet, the at least one first liquid outlet is respectively connected with the inlet of the at least one third flow channel, and the coolant enters the at least one third flow channel and the at least one fourth flow channel through the at least one first liquid outlet on the outer wall of the rotating shaft; The second end plate is provided with at least one inlet of the fifth flow channel and at least one outlet of the third flow channel, the inlet of the at least one fifth flow channel is located opposite to the at least one second liquid outlet, the at least one second liquid outlet is respectively connected to the inlet of the at least one fifth flow channel, and the inlet of the at least one fifth flow channel is respectively used to introduce the coolant flowing in the rotating shaft into the at least one fifth flow channel through the at least one second liquid outlet; The outlet of the fifth flow channel is used to spray the coolant in the fifth flow channel onto the surface of the end winding at one end of the motor stator, and the outlet of the third flow channel is used to spray the coolant in the third flow channel onto the surface of the end winding at the other end of the motor stator.

2. The motor according to claim 1, characterized in that The inlet of the at least one third flow channel is used to introduce the cooling liquid flowing in the rotating shaft into the at least one third flow channel through the at least one first liquid outlet.

3. The motor according to any one of claims 1 to 2, characterized in that: The first end plate is also provided with at least one outlet of the fourth flow channel, the inlet of the at least one third flow channel and the outlet of the at least one fourth flow channel are respectively connected with the at least one first liquid outlet on the outer wall of the rotating shaft, and the second end plate is also provided with at least one inlet of the fourth flow channel. The coolant can enter the at least one fourth flow channel through the outlet of the at least one fourth flow channel and be discharged through the inlet of the at least one fourth flow channel connected with the at least one fourth flow channel.

4. The motor according to any one of claims 1 to 3, characterized in that: The shapes of the inlet of the at least one third flow channel and the outlet of the at least one third flow channel are different.

5. The motor according to any one of claims 1 to 4, characterized in that: The first end plate and the second end plate have the same structure, one of the first end plate or the second end plate is installed on one side of the outer wall of the rotating shaft, and the other mirror image of the first end plate or the second end plate is installed on the other side of the outer wall of the rotating shaft.

6. The motor according to any one of claims 1 to 5, characterized in that: The outlet of at least one third flow channel is opposite to the end winding of the motor stator and is opened at a certain angle along the flow direction of the coolant in the rotating shaft, so as to spray the coolant flowing in the flow channel on the surface of the end winding of the motor stator.

7. The motor according to claim 6, characterized in that The opening position of the outlet of the at least one third flow channel is inclined at 45 degrees along the flow direction of the coolant in the rotating shaft.

8. The motor according to any one of claims 1 to 7, characterized in that: The inlet of the at least one third flow channel is evenly distributed around the rotation axis, the outlet of the at least one third flow channel is evenly distributed around the rotation axis, and the position of the at least one third flow channel is evenly distributed around the rotation axis.

9. A powertrain, characterized in that: It comprises the motor, electric drive and reducer as described in any one of claims 1 to 8.

10. An automobile, characterized in that: Comprising the powertrain, battery pack and wheels as described in claim 9.

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