CN116191751A

CN116191751A - Motor, cooling system and vehicle

Info

Publication number: CN116191751A
Application number: CN202310272300.4A
Authority: CN
Inventors: 周航; 袁帅; 李松松; 陈德鑫
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2023-05-30

Abstract

The application relates to the technical field of vehicles, and an embodiment of the application provides a motor, a cooling system and a vehicle. The first cooling cavity, the second cooling cavity and the third cooling cavity which are independent of each other are formed by enclosing the outer shell and the inner shell, so that two ends of the motor can be cooled respectively by the aid of the first cooling cavity and the third cooling cavity, and the middle of the motor can be cooled by the aid of the third cooling cavity. The cooling medium in the first cooling cavity and the cooling medium in the third cooling cavity are configured to be cooling oil, the parts located at the two ends of the motor are directly subjected to oil cooling, and the cooling medium in the second cooling cavity is configured to be cooling water, so that the inner shell can be subjected to water cooling, and the parts located in the middle of the motor are further subjected to water cooling. Therefore, the outer shell and the inner shell of the motor form corresponding cooling cavities, different cooling mediums are configured for different positions to cool, the temperature gradient among the parts of the motor can be improved, and the heat exchange efficiency is improved.

Description

Motor, cooling system and vehicle

Technical Field

The application relates to the technical field of vehicles, in particular to a motor, a cooling system and a vehicle.

Background

In the related art, due to the inconsistent heat generated by each part in the motor, it is difficult to reduce the temperature gradient between each part when the motor is cooled by the cooling system, so that the heat exchange efficiency of the motor needs to be improved.

Disclosure of Invention

Based on this, it is necessary to provide a motor, a cooling system and a vehicle to improve the temperature gradient between the parts of the motor and to improve the heat exchange efficiency.

According to one aspect of the present application, an embodiment of the present application provides a motor having a first section, a second section, and a third section disposed in order along an axis direction; the motor comprises an outer shell and an inner shell sleeved in the outer shell along the axis direction;

the inner peripheral surface of the outer shell and the outer peripheral surface of the inner shell are surrounded to form a first cooling cavity, a second cooling cavity and a third cooling cavity which are independent from each other, wherein the first cooling cavity is positioned at the first section, the second cooling cavity is positioned at the second section, and the third cooling cavity is positioned at the third section;

the outer shell is provided with an oil inlet, a first oil outlet, a second oil outlet and a water inlet and a first water outlet, wherein the oil inlet is respectively communicated with the first cooling cavity and the third cooling cavity, the first oil outlet is communicated with the first cooling cavity, the second oil outlet is communicated with the third cooling cavity, and the water inlet and the first water outlet are respectively communicated with the second cooling cavity; the inner shell is provided with a first oil injection hole communicated with the first cooling cavity and the inner shell, and a second oil injection hole communicated with the third cooling cavity and the inner shell.

In one embodiment, the first oil spray hole is used for supplying cooling oil to a winding welding end of the motor positioned at the first section, and the second oil spray hole is used for supplying cooling oil to a winding wire outlet end of the motor positioned at the third section.

In one embodiment, the motor further comprises a first end cap disposed on an end of the outer housing at the first section;

the first end cover is provided with a first mounting hole for mounting a rotor shaft of the motor and a first oil liquid channel; one end of the first oil liquid channel is communicated with the oil inlet, and the other end of the first oil liquid channel penetrates through the inner wall of the first mounting hole.

In one embodiment, the motor further comprises a second end cap disposed on an end of the outer housing at the third section;

the second end cover is provided with a second mounting hole for mounting a rotor shaft of the motor and a second oil liquid channel; one end of the second oil liquid channel is communicated with the oil inlet, and the other end of the second oil liquid channel penetrates through the inner wall of the second mounting hole.

In one embodiment, the rotor shaft is provided with a third oil liquid channel arranged along the axial direction, and an oil liquid inlet and an oil liquid outlet which are respectively communicated with the third oil liquid channel; the oil inlet is arranged at one end of the rotor shaft facing the second end cover, and the oil outlet is arranged on the circumferential side wall of the rotor shaft;

the motor further comprises a cover plate covered on the second mounting hole, and the cover plate is abutted against one end of the rotor shaft, which faces the second end cover;

a fourth oil liquid channel is arranged on the cover plate; one end of the fourth oil liquid channel is communicated with the second oil liquid channel, and the other end of the fourth oil liquid channel is communicated with the oil liquid inlet.

In one embodiment, the oil outlet comprises a first sub-outlet, a second sub-outlet and a third sub-outlet which are respectively arranged on the circumferential side wall of the rotor shaft; the first sub-outlet corresponds to the first section, the second sub-outlet corresponds to the second section, and the third sub-outlet corresponds to the third section; and/or

The motor also comprises an oil guide piece; the oil guide is communicated between the third oil liquid channel and the fourth oil liquid channel.

In one embodiment, the outer peripheral surface of the inner shell is sequentially provided with a first groove, a second groove and a third groove which are spaced from each other along the axial direction, the first groove is positioned at the first section, the second groove is positioned at the second section, and the third groove is positioned at the third section;

the inner peripheral surface of the outer shell body and the first groove enclose to form the first cooling cavity, the inner peripheral surface of the outer shell body and the second groove enclose to form the second cooling cavity, and the inner peripheral surface of the outer shell body and the third groove enclose to form the third cooling cavity.

In one embodiment, the first groove is disposed circumferentially around the inner housing; and/or

The second groove is arranged around the inner shell along the circumferential direction of the inner shell; and/or

The third groove is arranged around the inner shell along the circumferential direction of the inner shell.

In one embodiment, the inner shell is further provided with a plurality of separation ribs positioned on the bottom wall of the second groove;

all the separation ribs are arranged at intervals along the circumferential direction of the inner shell.

In one embodiment, the second groove is provided with a first side wall and a second side wall which are oppositely arranged along the axial direction, and all the separation ribs are sequentially and alternately connected with the first side wall and the second side wall; and/or

The longitudinal direction of the separation rib and the axial direction are parallel to each other.

In one embodiment, a fourth groove positioned at the second section is further formed in the inner shell, and one end of the fourth groove is communicated with the second groove;

the inner peripheral surface of the outer shell body and the fourth groove are enclosed to form a fourth cooling cavity, and the second cooling cavity is communicated with the water inlet and the first water outlet respectively by means of the fourth cooling cavity.

In one embodiment, at least part of the fourth groove is arranged circumferentially around the inner housing.

In one embodiment, the motor further comprises an oil pan provided at the bottom of the outer housing;

the oil pan is provided with a first accommodating cavity and a third oil outlet communicated with the first accommodating cavity, and the first accommodating cavity is communicated with the first oil outlet and the second oil outlet respectively.

In one embodiment, the oil pan further has a second accommodation chamber independent from the first accommodation chamber, and a second water outlet communicating with the second accommodation chamber;

the second accommodating cavity is communicated with the first water outlet.

According to another aspect of the present application, embodiments provide a cooling system comprising:

the motor as in any above embodiment; and

the oil inlet of the radiator is respectively communicated with the first oil outlet and the second oil outlet, the oil outlet of the radiator is communicated with the oil inlet, and the water inlet of the radiator is communicated with the first water outlet.

In one embodiment, the cooling system further comprises a driving pump arranged on the oil inlet path of the oil inlet;

the driving pump is used for providing driving force for oil entering the oil inlet.

According to yet another aspect of the present application, embodiments of the present application provide a vehicle comprising a cooling system as described in any of the above embodiments.

In above-mentioned motor, cooling system and the vehicle, the motor includes shell body and interior casing at least, encloses through shell body and interior casing and closes first cooling chamber, second cooling chamber and the third cooling chamber that forms mutually independent, and first cooling chamber is located the first section of motor, and the second cooling chamber is located the second section of motor, and the third cooling chamber is located the third section of motor for can cool off the both ends of motor respectively with the help of first cooling chamber and third cooling chamber, cool off the middle part of motor with the help of the third cooling chamber. Because both ends of the motor are respectively provided with a winding welding end, a winding wire outlet end and other parts correspondingly, the heat generated at both ends of the motor is higher than the heat generated at the middle part of the motor, the cooling oil can directly cool the parts positioned at both ends of the motor by means of the first oil spray holes and the second oil spray holes by configuring the cooling medium in the first cooling cavity and the third cooling cavity as cooling oil, and the inner shell can be water-cooled by configuring the cooling medium in the second cooling cavity as cooling water, so that the parts positioned at the middle part of the motor are water-cooled. Therefore, the outer shell and the inner shell of the motor form corresponding cooling cavities, different cooling mediums are configured for different positions to cool, the temperature gradient among the parts of the motor can be improved, and the heat exchange efficiency is improved.

Additional aspects and advantages of embodiments of the application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the application.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings.

In the drawings:

FIG. 1 is a schematic diagram of a motor according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of the motor illustrated in FIG. 1;

FIG. 3 is a schematic view of the inner housing of the motor of FIG. 1 from one perspective;

FIG. 4 is a schematic view of the mated configuration of the housing and first end cap of the motor illustrated in FIG. 1 from one perspective;

FIG. 5 is a schematic view of the mated outer housing and first end cap of the motor illustrated in FIG. 1 from another perspective;

FIG. 6 is a schematic view of a second end cap of the motor of FIG. 1 from one perspective;

FIG. 7 is a schematic view of a second end cap of the motor of FIG. 1 from another perspective;

FIG. 8 is a schematic view of a rotor shaft of the motor illustrated in FIG. 1;

FIG. 9 is a schematic cross-sectional structural view of a rotor shaft in the motor illustrated in FIG. 1;

FIG. 10 is a schematic view of a cover plate of the motor shown in FIG. 1 from one view;

FIG. 11 is a schematic view of a cover plate in another view of the motor shown in FIG. 1;

fig. 12 is a schematic perspective view of an oil path in the motor illustrated in fig. 1;

fig. 13 is a schematic view of the inner housing of the motor of fig. 1 from another perspective.

Reference numerals in the specific embodiments are as follows:

the motor 10, the first section L1, the second section L2, the third section L3;

the oil-jet engine comprises a shell assembly 100, an outer shell 110, an inner shell 120, a first groove 121, a second groove 122, a bottom wall 122a, a first side wall 122b, a second side wall 122c, a third groove 123, a fourth groove 124, a partition rib g, a first end cover 130, a first mounting hole a1, a fourth oil outlet y5, an oil outlet channel h, a second end cover 140, a second mounting hole a2, a cover plate 150, an oil pan 160, a first cooling cavity Q1, a second cooling cavity Q2, a third cooling cavity Q3, a fourth cooling cavity Q4, a first accommodating cavity R1, a second accommodating cavity R2, an oil inlet y1, a first oil outlet y2, a second oil outlet y3, a third oil outlet y4, a water inlet s1, a first water outlet s2, a second water outlet s3, a first oil jet p1, a second oil jet p2, a first oil channel R1, a second oil channel R2 and a fourth oil channel R4;

the rotor shaft 200, the third oil channel r3, the oil inlet k1, the oil outlet k2, the first sub-outlet k21, the second sub-outlet k22 and the third sub-outlet k23;

rotor assembly 300, rotor core 310, rotor permanent magnets 320;

a stator core 400;

winding weld end 510, winding wire outlet end 520;

a first bearing 610 and a second bearing 620;

a first oil seal 710, a second oil seal 720;

oil guide 800;

the axis direction x.

Detailed Description

In order to make the above objects, features and advantages of the present application more comprehensible, a detailed description of embodiments accompanied with figures is provided below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of embodiments of the present application. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application. The embodiments of the present application may be implemented in many other ways than those described herein, and similar modifications may be made by those skilled in the art without departing from the spirit of the invention, so that the embodiments of the present application are not limited to the specific embodiments disclosed below.

It will be appreciated that the terms "first," "second," and the like, as used herein, may be used to describe various terms, and are not to be interpreted as indicating or implying a relative importance or an implicit indication of the number of technical features being indicated. However, unless specifically stated otherwise, these terms are not limited by these terms. These terms are only used to distinguish one term from another. In the description of the embodiments of the present application, the meaning of "a plurality", "a number" or "a plurality" is at least two, such as two, three, etc., unless explicitly defined otherwise.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of embodiments of the present application, unless explicitly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intermediary. Moreover, a first feature being "above," "over" and "on" a second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature level is higher than the second feature level. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature level is less than the second feature level.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

For convenience in describing the motor in an embodiment of the present application, a description will be given of a motor structure in one embodiment. It is understood that the structure of the motor includes, but is not limited to, the motor structure in this embodiment.

Fig. 1 shows a schematic structural view of a motor 10 in an embodiment of the present application; fig. 2 shows a schematic cross-sectional structure of the motor 10 illustrated in fig. 1; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, referring to fig. 1 and 2, an electric machine 10 provided in an embodiment of the present application includes a housing assembly 100, a rotor shaft 200, a rotor assembly 300, a stator core 400, windings, a first bearing 610, a second bearing 620, a first oil seal 710, and a second oil seal 720.

The housing assembly 100 includes an outer housing 110, an inner housing 120, a first end cap 130, a second end cap 140, and a cover plate 150. The inner housing 120 is sleeved in the outer housing 110 along the axis direction x, one end of the outer housing 110 along the axis direction x is provided with a first end cover 130, and the other end of the outer housing 110 along the axis direction x is provided with a second end cover 140. The first end cover 130 is provided with a first mounting hole a1, the second end cover 140 is provided with a second mounting hole a2, and the cover plate 150 covers the second mounting hole a2. It will be appreciated that the first end cap 130 may be removably coupled to the outer housing 110, the second end cap 140 may be removably coupled to the outer housing 110, and the cover plate 150 may be removably coupled to the second end cap 140.

One end of the rotor shaft 200 in the axis direction x is rotatably mounted at the first mounting hole a1 by means of a first bearing 610, and the other end of the rotor shaft 200 in the axis direction x is rotatably mounted at the second mounting hole a2 by means of a second bearing 620. The first oil seal 710 is arranged at the first mounting hole a1, and the second oil seal 720 is arranged at the second mounting hole a2. The rotor assembly 300 is mounted in the stator core 400 by the rotor shaft 200. Rotor assembly 300 includes rotor core 310 and rotor permanent magnets 320. The arrangement and number of the rotor cores 310 and the rotor permanent magnets 320 may be set according to actual use requirements, which is not particularly limited in the embodiment of the present application. It will be appreciated that the stator core 400 and the rotor assembly 300 are housed within the inner housing 120. The longitudinal direction of rotor shaft 200 is the axial direction x. The winding welding end 510 of the motor 10 is near one end of the outer case 110 in the axial direction x, and the winding wire outlet end 520 of the motor 10 is near the other end of the outer case 110 in the axial direction x.

Taking fig. 1 and 2 as an example, the motor 10 has a first section L1, a second section L2, and a third section L3 that are disposed in this order in the axis direction x. It can be seen that the first end cap 130, the first bearing 610, the first oil seal 710, and the winding weld end 510 are located in the first section L1, the stator core 400 and the rotor assembly 300 are located in the second section L2, and the second end cap 140, the second bearing 620, the second oil seal 720, and the winding wire outlet end 520 are located in the third section L3 in the motor 10. In operating the motor 10, the first bearing 610, the first oil seal 710, and the winding welding end 510 at the first stage L1 of the motor 10 generate heat, the stator core 400 and the rotor assembly 300 at the second stage L2 of the motor 10 generate heat, the second bearing 620, the second oil seal 720, and the winding wire outlet end 520 at the third stage L3 of the motor 10 generate heat, and the heat generated at the first stage L1 and the third stage L3 of the motor 10 are greater than the heat generated at the second stage L2.

With continued reference to fig. 1 and 2, the inner peripheral surface of the outer case 110 and the outer peripheral surface of the inner case 120 enclose a first cooling chamber Q1, a second cooling chamber Q2, and a third cooling chamber Q3 that are independent of each other. The first cooling cavity Q1 is located at the first segment L1, the second cooling cavity Q2 is located at the second segment L2, and the third cooling cavity Q3 is located at the third segment L3.

With reference to fig. 4, which will be described later, the outer housing 110 is provided with an oil inlet y1, a first oil outlet y2, a second oil outlet y3, a water inlet s1 and a first water outlet s2. The oil inlet y1 is respectively communicated with the first cooling cavity Q1 and the third cooling cavity Q3. The first oil outlet y2 is communicated with the first cooling cavity Q1. The second oil outlet y3 is communicated with the third cooling cavity Q3. The water inlet s1 and the first water outlet s2 are respectively communicated with the second cooling cavity Q2. For example, taking fig. 1 and 2 as an example, the water inlet s1 may be provided at the top of the outer case 110, and the first water outlet s2 may be provided at the bottom of the outer case 110. The inner housing 120 is provided with a first oil spray hole p1 and a second oil spray hole p2, the first oil spray hole p1 is communicated with the first cooling cavity Q1 and the inner housing 120, and the second oil spray hole p2 is communicated with the third cooling cavity Q3 and the inner housing 120.

Thus, by configuring the cooling medium in the first cooling chamber Q1 and the third cooling chamber Q3 as cooling oil, the cooling oil can directly oil-cool the components located at both ends of the motor 10 by means of the first oil spray holes p1 and the second oil spray holes p2, and by configuring the cooling medium in the second cooling chamber Q2 as cooling water, the inner housing 120 can be water-cooled, and thus the components located at the middle of the motor 10 can be water-cooled. Therefore, the outer casing 110 and the inner casing 120 of the motor 10 form corresponding cooling cavities, and different cooling mediums are arranged for different positions to cool, so that the temperature gradient between the parts of the motor 10 can be improved, and the heat exchange efficiency can be improved.

Fig. 3 is a schematic view showing the structure of the inner housing 120 at a view angle in the motor 10 shown in fig. 1; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, referring to fig. 2 in combination with fig. 3, the first oil spray hole p1 is used to provide cooling oil to the winding weld end 510 of the motor 10 located in the first segment L1, and the second oil spray hole p2 is used to provide cooling oil to the winding wire outlet end 520 of the motor 10 located in the third segment L3. It is understood that the first oil spray hole p1 may be opened toward the winding welding end 510, and the second oil spray hole p2 may be opened toward the winding wire outlet end 520. In this way, the cooling effect on the winding welding terminal 510 and the winding wire outlet terminal 520 can be improved.

Fig. 4 shows a schematic view of the mated configuration of the outer housing 110 and the first end cap 130 of the motor 10 shown in fig. 1 from one perspective; fig. 5 shows a schematic view of the mated configuration of the outer housing 110 and the first end cap 130 of the motor 10 shown in fig. 1 from another perspective; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, referring to fig. 1 and 2, and referring to fig. 4 and 5 in combination, the first oil passage r1 is further provided in the first end cover 130. One end of the first oil liquid channel r1 is communicated with the oil inlet y1, and the other end of the first oil liquid channel r1 penetrates through the inner wall of the first mounting hole a 1. That is, the cooling oil can enter the first oil passage r1 via the oil inlet y1, and then be ejected from the inner wall of the first mounting hole a 1. Since the first bearing 610 and the first oil seal 710 are further disposed at the first mounting hole a1, the cooling oil sprayed from the inner wall of the first mounting hole a1 can cool the first bearing 610 and the first oil seal 710, and can also indirectly cool the portion of the rotor shaft 200 near the first cover plate 150.

In particular, in some embodiments, referring to fig. 1 and 2, and referring to fig. 4 and 5 in combination, the inner wall surface of the first end cover 130 is provided with a fourth oil outlet y5, and the cooling oil flowing through the first bearing 610 and the first oil seal 710 may flow out through the fourth oil outlet y 5. In connection with some embodiments illustrated later, an oil outlet passage h communicating with the fourth oil outlet y5 may be correspondingly provided on the outer wall of the oil pan 160, for example, the oil outlet passage h may communicate with a radiator illustrated later to enable oil return.

Fig. 6 shows a schematic structural view of the second end cap 140 from a perspective of the motor 10 shown in fig. 1; fig. 7 shows a schematic structural view of the second end cap 140 from another perspective in the motor 10 shown in fig. 1; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, referring to fig. 1 and 2 in combination with fig. 6 and 7, the second end cover 140 is further provided with a second oil channel r2. One end of the second oil liquid channel r2 is communicated with the oil inlet y1, and the other end of the second oil liquid channel r is communicated with the inner wall of the second mounting hole a2. That is, the cooling oil can enter the second oil passage r2 via the oil inlet y1, and then be ejected from the inner wall of the second mounting hole a2. Since the second mounting hole a2 is further provided with the second bearing 620 and the second oil seal 720, the cooling oil sprayed from the inner wall of the second mounting hole a2 can cool the second bearing 620 and the second oil seal 720, and can also indirectly cool the portion of the rotor shaft 200 close to the second cover plate 150.

Fig. 8 shows a schematic structural view of a rotor shaft 200 in the motor 10 shown in fig. 1; fig. 9 shows a schematic cross-sectional structure of a rotor shaft 200 in the motor 10 shown in fig. 1; fig. 10 is a schematic view showing the structure of the cover plate 150 at a view angle in the motor 10 shown in fig. 1; fig. 11 is a schematic view showing the structure of the cover plate 150 at another view angle in the motor 10 shown in fig. 1; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, referring to fig. 8 and 9, the rotor shaft 200 is provided with a third oil channel r3 disposed along the axial direction, and an oil inlet k1 and an oil outlet k2 respectively connected to the third oil channel r 3. The oil inlet k1 is formed at one end of the rotor shaft 200 facing the second end cover 140, and the oil outlet k2 is formed at a circumferential side wall of the rotor shaft 200. With continued reference to fig. 1 and 2, and with reference to fig. 12 and 13, the cover plate 150 abuts against an end of the rotor shaft 200 facing the second end cover 140, and a fourth oil channel r4 is disposed on the cover plate 150. One end of the fourth oil channel r4 is communicated with the second oil channel r2, and the other end is communicated with an oil inlet k1 of the third oil channel r 3. Thus, when the rotor shaft 200 rotates, the cooling oil is sequentially thrown out from the oil outlet k2 through the second oil passage r2, the fourth oil passage r4, and the third oil passage r3, and can directly cool the inner side of the winding end portion, the first bearing 610, and the second bearing 620, and indirectly cool the rotor assembly 300.

In some embodiments, with continued reference to fig. 12 and 13, the oil outlet k2 includes a first sub-outlet k21, a second sub-outlet k22, and a third sub-outlet k23, respectively, provided in a circumferential sidewall of the rotor shaft 200. The first sub-outlet k21 corresponds to the first segment L1, the second sub-outlet k22 corresponds to the second segment L2, and the third sub-outlet k23 corresponds to the third segment L3. Illustratively, the hole site of the first sub-outlet k21 corresponds to the inside middle of the winding welding end 510, the hole site of the second sub-outlet k22 corresponds to one half of the length of the rotor core 310 in the axial direction x, and the hole site of the third sub-outlet k23 corresponds to the inside middle of the winding wire outlet end 520. In this way, by providing the first sub-outlet k21, the second sub-outlet k22 and the third sub-outlet k23, cooling of different parts is further achieved.

In some embodiments, referring to fig. 2, the motor 10 further includes an oil guide 800. The oil guide 800 is communicated between the third oil passage r3 and the fourth oil passage r4. Illustratively, the oil guide 800 may be configured as an oil guide pipe. In this way, by providing the oil guide 800, it is convenient to guide the cooling oil from the fourth oil passage r4 into the third oil passage r 3.

Fig. 12 is a schematic perspective view showing an oil passage in the motor 10 shown in fig. 1; for ease of illustration, only matters relevant to the embodiments of the present application are shown. It will be appreciated that the oil path structure shown in fig. 12 is a simplified structure in the embodiment of the present application, and is used to characterize the relative positional relationship of the parts in the oil path.

In some embodiments, please refer to fig. 12 in combination with fig. 1 to 7, 10 and 11, and after cooling oil enters the oil inlet y 1: (1) One path enters the first oil channel r1, and after exiting from the first oil channel r1, the first bearing 610 and the first oil seal 710 are subjected to oil cooling; (2) One path enters a first cooling cavity Q1 and is sprayed to a winding welding end 510 from a first oil spraying hole p 1; (3) One path enters the second cooling cavity Q2 and is sprayed to the winding wire outlet end 520 from the second oil spraying hole p 2; (4) One path enters the second oil channel r2, and after exiting from the second oil channel r2, the second bearing 620 and the second oil seal 720 are subjected to oil cooling; (5) After entering the second oil channel r2, the cooling oil enters the fourth oil channel r4 and the oil guide 800 in turn, enters the third oil channel r3, and during rotation of the rotor shaft 200, the cooling oil is thrown out of the first sub-outlet k21, the second sub-outlet k22 and the third sub-outlet k23, so that the first bearing 610, the second bearing 620, the winding inner layer and the rotor assembly 300 can be subjected to oil cooling. Under the action of gravity, the cooling oil in the housing assembly 100 enters the first accommodating chamber R1 of the oil pan 160 through the first oil outlet hole and the second oil outlet hole, flows out from the third oil outlet hole of the oil pan 160, and enters the oil outlet passage h through the fourth oil outlet y 5. Alternatively, the oil outlet passage h may also communicate with the oil pan 160.

For example, taking fig. 12 as an example, the extending direction of the first oil passage r1, the extending direction of the second oil passage r2, and the extending direction of the fourth oil passage r4 are parallel to each other and perpendicular to the axis direction x. The extending direction of the oil guide 800 and the axis direction x are perpendicular to each other. Therefore, oil cooling can be directly realized on corresponding components, and heat exchange efficiency is further improved.

Fig. 13 is a schematic view showing the structure of the inner housing 120 at another view angle in the motor 10 shown in fig. 1; for ease of illustration, only matters relevant to the embodiments of the present application are shown.

In some embodiments, please continue to refer to fig. 3, and refer to fig. 13 in combination, the outer peripheral surface of the inner housing 120 is sequentially provided with a first groove 121, a second groove 122 and a third groove 123 spaced from each other along the axis direction x. It will be appreciated that the first groove 121, the second groove 122 and the third groove 123 are formed by recessing the outer peripheral surface of the inner housing 120 in a direction away from the outer housing 110. The first groove 121 is located at the first section L1, the second groove 122 is located at the second section L2, and the third groove 123 is located at the third section L3. The inner peripheral surface of the outer case 110 encloses with the first groove 121 to form a first cooling chamber Q1, the inner peripheral surface of the outer case 110 encloses with the second groove 122 to form a second cooling chamber Q2, and the inner peripheral surface of the outer case 110 encloses with the third groove 123 to form a third cooling chamber Q3.

In this way, by providing the corresponding grooves on the outer peripheral surface of the inner housing 120, a corresponding cooling cavity is formed, so that the overall cooling structure is simpler. In addition, by integrating the corresponding grooves on the inner housing 120, not only is the manufacturing and forming convenient, but also the design and manufacture of the corresponding cooling cavity can be facilitated.

In some embodiments, please continue to refer to fig. 3, in combination with fig. 13, the first groove 121 is disposed circumferentially around the inner housing 120 along the inner housing 120; and/or, the second groove 122 is provided around the inner case 120 along the circumference of the inner case 120; and/or, the third groove 123 is provided around the inner case 120 in the circumferential direction of the inner case 120. Thus, the heat exchange efficiency can be further improved.

In particular, in some embodiments, referring to fig. 3, and referring to fig. 13 in combination, a plurality of first oil injection holes p1 are provided, and all the first oil injection holes p1 are disposed at intervals along the circumferential direction of the inner housing 120 at the bottom wall of the first groove 121. Of course, a plurality of second oil injection holes p2 may be provided, and all of the second oil injection holes p2 may be provided at a bottom wall of the third recess 123 in a circumferential direction of the inner housing 120. For example, all of the first fuel injection holes p1 may be arranged at equal intervals, and all of the second fuel injection holes p2 may be arranged at equal intervals.

In some embodiments, referring to fig. 3, and referring to fig. 13 in combination, the inner housing 120 is further provided with a plurality of separation ribs g located on the bottom wall 122a of the second recess 122. All the partition ribs g are arranged at intervals along the circumferential direction of the inner case 120. Therefore, when cooling water enters the second cooling cavity Q2, due to the existence of the separation ribs g, the time that the cooling water stays in the second cooling cavity Q2 can be prolonged, and heat exchange efficiency is further improved.

In some embodiments, please continue to refer to fig. 3, and refer to fig. 13 in combination, the second groove 122 has a first sidewall 122b and a second sidewall 122c disposed opposite to each other along the axis x, and all the separating ribs g alternately connect the first sidewall 122b and the second sidewall 122c in sequence. In this way, the cooling water channel formed in the second groove 122 has a substantially spiral structure, and the time for the cooling water to stay in the second cooling cavity Q2 is further prolonged.

In some embodiments, please continue to refer to fig. 3, and refer to fig. 13 in combination, the longitudinal direction and the axial direction x of the separation rib g are parallel to each other. Since the inner housing 120 is substantially a circular cylindrical structure, the rotation axis of the inner housing 120 and the axis direction x are parallel to each other. When the cooling water flows toward the bottom of the motor 10 due to the gravity, the separation rib g can intercept the cooling water positively, and further lengthen the time for the cooling water to stay in the second cooling chamber Q2 when the longitudinal direction and the axial direction x of the separation rib g are parallel to each other.

In some embodiments, please continue to refer to fig. 3, and referring to fig. 13 in combination, a fourth groove 124 located in the second section L2 is further provided on the inner housing 120, and one end of the fourth groove 124 is connected to the second groove 122. The inner peripheral surface of the outer housing 110 and the fourth groove 124 enclose a fourth cooling cavity Q4, and the second cooling cavity Q2 is respectively communicated with the water inlet s1 and the first water outlet s2 by means of the fourth cooling cavity Q4. Illustratively, at least a portion of the fourth groove 124 is disposed circumferentially around the inner housing 120 along the inner housing 120. In this way, the cooling water enters the second cooling chamber Q2 after passing through the fourth cooling chamber Q4, and the time for the cooling water to enter the second cooling chamber Q2 is prolonged.

In some embodiments, referring to fig. 2, 4 and 5, the motor 10 further includes an oil pan 160 disposed at the bottom of the outer housing 110. The oil pan 160 has a first accommodation chamber R1 and a third oil outlet y4 communicating with the first accommodation chamber R1, and the first accommodation chamber R1 communicates with the first oil outlet y2 and the second oil outlet y3, respectively. In this way, the cooling oil may flow into the first accommodating chamber R1 of the oil pan 160 by gravity, the oil pan 160 may accommodate the cooling oil, and the cooling oil may be discharged from the third oil outlet y 4.

In some embodiments, referring to fig. 2, 4 and 5, the oil pan 160 further has a second accommodating chamber R2 independent from the first accommodating chamber R1, and a second water outlet s3 communicating with the second accommodating chamber R2. The second accommodating chamber R2 communicates with the first water outlet s2. In this way, the cooling water is discharged from the second water outlet s3 through the second accommodation chamber R2 by the gravity.

Based on the same inventive concept, the embodiment of the present application further provides a cooling system, where the cooling system includes the motor 10 in any of the above embodiments and a radiator, where an oil inlet of the radiator is respectively connected to the first oil outlet y2 and the second oil outlet y3, an oil outlet of the radiator is connected to the oil inlet y1, and a water inlet of the radiator is connected to the first water outlet s2. The advantages of the motor 10 in any of the above embodiments are the same as those of the cooling system provided in the embodiment of the present application, and will not be described herein.

In particular to some embodiments, the oil inlet of the radiator communicates with the first and second outlets y2 and y3 via the third outlet y4 of the sump 160. The oil pan 160 serves to supply cooling oil and store the cooling oil. After the motor 10 and the radiator constitute a cooling circulation system, the cooling oil flowing back to the oil pan 160 may reenter the oil inlet y1 via the radiator. In this way, the utilization rate of the cooling oil can be further improved.

In some embodiments, the cooling system further includes a driving pump disposed on the oil inlet path of the oil inlet y1, the driving pump for providing driving force of the oil into the oil inlet y1. Thus, by arranging the driving pump, the recycling of the cooling oil is facilitated.

Based on the same inventive concept, embodiments of the present application also provide a vehicle including the cooling system in any of the above embodiments. The cooling system in any of the above embodiments has advantages, and the vehicle provided in the embodiment of the present application is also provided, which is not described herein.

In summary, in the embodiment of the present application, the components at different positions inside the motor 10 are cooled by adopting the water cooling mode and the oil cooling mode which are independent and mutually matched, the stator core 400 can be cooled by the water cooling mode, the temperature gradient between the inner layer and the outer layer of the winding is reduced by the oil cooling mode, the corresponding bearing and the corresponding oil seal can be directly cooled, and the rotor permanent magnet 320 is indirectly cooled. Specifically, by forming corresponding grooves in the outer peripheral surface of the inner case 120, corresponding cooling chambers are formed, and corresponding cooling media are disposed to cool the components in different positions. By providing corresponding channels and oil ports on the first end cap 130, the second end cap 140, the cover plate 150 and the housing, cooling of components at different locations within the housing assembly 100 is further achieved by the cooperation of the corresponding channels with each other. By providing corresponding passages in the rotor shaft 200, it is possible to further cool components at different locations within the housing assembly 100 by rotation of the rotor shaft 200. In this process, by designing the oil duct and the water channel for each component of the housing assembly 100 and designing the oil duct for the rotor shaft 200, each structure is mutually matched, so that not only is the manufacturing difficulty of the cooling structure reduced, but also the winding with the highest internal temperature of the motor 10 can be directly cooled and the components such as the stator core 400 can be effectively cooled. Thereby, the service life, heat exchange efficiency and reliability of the motor 10 are improved.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the invention. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application is to be determined by the claims appended hereto.

Claims

1. An electric motor, characterized in that the electric motor has a first section, a second section and a third section which are arranged in sequence along an axis direction; the motor comprises an outer shell and an inner shell sleeved in the outer shell along the axis direction;

2. The electric machine of claim 1, wherein the first oil jet is configured to provide cooling oil to winding weld ends of the electric machine at the first segment and the second oil jet is configured to provide cooling oil to winding wire ends of the electric machine at the third segment.

3. The electric machine of claim 1, further comprising a first end cap disposed on an end of the outer housing at the first section;

4. The motor of claim 1 further comprising a second end cap disposed on an end of the outer housing at the third section;

5. The motor of claim 4, wherein the rotor shaft is provided with a third oil passage arranged along the axial direction, and an oil inlet and an oil outlet respectively communicated with the third oil passage; the oil inlet is arranged at one end of the rotor shaft facing the second end cover, and the oil outlet is arranged on the circumferential side wall of the rotor shaft;

6. The electric machine of claim 5, wherein the oil outlet includes a first sub-outlet, a second sub-outlet, and a third sub-outlet respectively provided to a circumferential sidewall of the rotor shaft; the first sub-outlet corresponds to the first section, the second sub-outlet corresponds to the second section, and the third sub-outlet corresponds to the third section; and/or

7. The motor according to any one of claims 1 to 6, wherein an outer peripheral surface of the inner housing is provided with a first groove, a second groove, and a third groove that are spaced from each other in the axial direction in this order, the first groove being located in the first section, the second groove being located in the second section, the third groove being located in the third section;

8. The motor of claim 7, wherein the first groove is disposed circumferentially around the inner housing; and/or

9. The motor of claim 8, wherein the inner housing further comprises a plurality of separating ribs positioned on the bottom wall of the second recess;

10. The motor of claim 9, wherein the second groove has oppositely disposed first and second side walls in the axial direction, all of the partition ribs alternately connecting the first and second side walls in turn; and/or

11. The motor of claim 9, wherein the inner housing is further provided with a fourth groove located at the second section, and one end of the fourth groove is communicated with the second groove;

12. The electric machine of claim 11, wherein at least a portion of the fourth groove is disposed circumferentially around the inner housing.

13. The motor of any one of claims 1-6, further comprising an oil pan disposed at a bottom of the outer housing;

14. The motor of claim 13, wherein the oil pan further has a second accommodation chamber independent from the first accommodation chamber, and a second water outlet communicating with the second accommodation chamber;

the second accommodating cavity is communicated with the first water outlet.

15. A cooling system, comprising:

the electric machine of any one of claims 1-14; and

16. The cooling system of claim 15, further comprising a drive pump disposed in an oil feed path of the oil inlet;

17. A vehicle comprising a cooling system according to claim 15 or 16.