CN218648637U - Oil-cooled motor and vehicle - Google Patents

Abstract

The utility model belongs to the technical field of the motor cooling, oil-cooled motor and vehicle are disclosed, this oil-cooled motor includes the casing, the end cover, the rotor subassembly, stator module, first oil ring and oil guide pipe, the casing is provided with oil feed passageway and oil catch bowl, the rotor subassembly rotates to set up in the casing, the rotor subassembly is provided with first oil circuit, stator module is around locating the rotor subassembly, be provided with the second oil circuit on the stator subassembly, first oil ring cover is located on the rotor subassembly, the third oil circuit has been seted up to first oil ring, oil guide pipe sets up in the inside of rotor subassembly, the second oil circuit all is linked together with the oil feed passageway with oil guide pipe's one end, the second oil circuit is linked together with third oil circuit and first oil circuit respectively with oil guide pipe's the other end, first oil circuit and third oil circuit all set up with the oil catch bowl intercommunication, use the stator module of coolant oil to the motor, rotor subassembly and casing cool off, strengthen the radiating effect of motor, effectively improve the work efficiency of motor, thereby can guarantee the reliable steady operation of car.

Description

Oil-cooled motor and vehicle

Technical Field

The utility model relates to a motor cooling technical field especially relates to oil-cooled motor and vehicle.

Background

The motor generally comprises rotor, stator, pivot and casing, and taking new energy automobile's driving motor as an example, the higher is rotational speed, torque density and power density of motor, and the heat that the rotor produced also is higher in rotatory in-process, consequently, the heat dissipation and the cooling of motor are essential to the reliable stable high-efficient operation of motor.

The cooling of the motor usually adopts a cooling fan and a shell for radiation, the radiation mode has better surface radiation effect on the motor, but for high-heating parts such as a stator and a rotor in the motor, for example, when the motor runs at a low speed, the stator generates heat greatly; when the motor operates at high speed, the heat generation of the rotor increases sharply. If the heat generated by the components can not be cooled effectively, the operation reliability and stability of the motor are poor, and the working efficiency of the motor is influenced, so that the reliable and stable operation of the automobile is influenced.

Therefore, there is a need for an oil-cooled electric machine and a vehicle to solve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an oil-cooled machine and vehicle cools off the stator module, rotor subassembly and the casing of motor, strengthens the radiating effect of motor, effectively improves the work efficiency of motor to can guarantee the reliable steady operation of car.

In order to solve the above problems existing in the prior art, the utility model adopts the following technical scheme:

an oil-cooled electric machine comprising:

the oil collecting device comprises a shell and a control device, wherein the shell is provided with an oil collecting groove and an oil inlet channel;

an end cap mounted on the housing;

the rotor assembly is rotatably arranged in the shell and is provided with a first oil path along the circumferential direction of the rotor assembly, and one end of the first oil path is communicated with the oil collecting tank;

the stator assembly is arranged in the shell in a winding mode and provided with a second oil path along the peripheral direction of the stator assembly, and one end of the second oil path is communicated with the oil inlet channel;

the first oil ring is positioned between the end cover and the stator assembly, the first oil ring is sleeved on the rotor assembly, a third oil path is formed in the first oil ring, and two ends of the third oil path are respectively communicated with the oil collecting groove and the other end of the second oil path;

and the oil guide pipe is arranged in the rotor assembly, and two ends of the oil guide pipe are respectively communicated with the oil inlet channel and the other end of the first oil way.

Preferably, the rotor subassembly including rotate connect in the rotor shaft and the fixed cover of casing are located the rotor core of rotor shaft, the quantity of first oil circuit has a plurality ofly, and is a plurality of first oil circuit is followed the circumferencial direction interval of rotor shaft sets up, the oil feed passageway passes through lead oil pipe with the inside intercommunication setting of rotor shaft.

Preferably, the oil-cooled motor further includes a bearing, the bearing is sleeved on the rotor shaft, an outer ring of the bearing is fixedly connected to the stator assembly, and along an axial direction of the rotor shaft, a part of the first oil paths is located on one side of the bearing, and another part of the first oil paths is located on the other side of the bearing.

Preferably, the housing is further provided with an oil return passage, and the first oil passage is communicated with the oil collecting tank through the oil return passage.

Preferably, the oil-cooled motor further comprises a second oil ring, the second oil ring is located between the housing and the stator assembly, the second oil ring is sleeved on the rotor assembly, the second oil ring is provided with a fourth oil path, and the fourth oil path is communicated with the oil collecting tank through the oil return channel.

Preferably, stator module includes stator core and stator winding, stator core set up in on the rotor subassembly, just stator core with casing interference fit, stator winding is around locating stator core's inner wall, stator winding sets up to the flat line type.

Preferably, the second oil path includes an annular oil path and an axial oil path, the axial oil path and the annular oil path are respectively arranged on the outer wall of the stator core along the axial direction and the circumferential direction of the housing, the axial oil path is communicated with the oil inlet channel through the annular oil path, and the axial oil path is used for spray-cooling the stator winding.

Preferably, the number of the axial oil passages is multiple, and the axial oil passages are arranged at intervals along the circumferential direction of the stator core.

Preferably, the oil-cooled motor further comprises a radiator, the radiator is arranged on the shell, the shell is further provided with an oil outlet channel, and the oil inlet channel and the oil outlet channel are both located in the radiator.

In order to achieve the purpose, the utility model also provides a vehicle, including foretell oil-cooled motor.

The utility model has the advantages that:

the utility model provides an oil-cooled motor, the rear portion of casing is connected with the end cover, and the bottom of casing is provided with the oil trap. The rotor subassembly rotates and sets up in the casing, and along the circumferencial direction of rotor subassembly, the rotor subassembly is provided with first oil circuit, and stator module is located the casing, and stator module is provided with the second oil circuit on the stator module along stator module's periphery direction around locating the rotor subassembly, and first oil ring is located between end cover and the stator module. The rotor subassembly is located to first oil ring cover, and the third oil circuit has been seted up to first oil ring, leads oil pipe and sets up in the inside of rotor subassembly, and the second oil circuit all is linked together with the oil feed passageway with the one end of leading oil pipe, and the second oil circuit is linked together with the other end of leading oil pipe respectively with third oil circuit and first oil circuit, and first oil circuit and third oil circuit all set up with the oil trap intercommunication. The oil-cooled motor mainly comprises two oil paths, wherein one oil path is used for cooling oil to enter from an oil inlet channel, then the cooling oil flows through a second oil path arranged on the stator assembly and a third oil path arranged on a first oil ring to cool the stator assembly, and finally the cooling oil returns to an oil collecting tank; the other oil path is formed by the fact that cooling oil enters from the oil inlet channel, enters the oil guide pipe between the end cover and the shell to cool the interior of the rotor assembly, then carries out oil throwing cooling on the exterior of the rotor assembly, the inner side of the stator assembly and the shell through the first oil path, and finally returns to the oil collecting groove. The stator assembly, the rotor assembly and the shell of the motor are cooled by using the cooling oil, the heat dissipation effect of the motor is enhanced, the working efficiency of the motor is effectively improved, and therefore the reliable and stable operation of an automobile can be guaranteed.

The utility model provides a vehicle, this oil-cooled motor can cool off the casing of the inside stator module of motor, rotor subassembly and motor through the coolant oil, strengthens the radiating effect of motor, effectively improves the work efficiency of motor to can guarantee the reliable steady operation of vehicle.

Drawings

Fig. 1 is a schematic structural view of an oil-cooled motor according to an embodiment of the present invention;

fig. 2 is a sectional view of an oil-cooled motor according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a housing in an embodiment of the present invention;

fig. 4 is a cross-sectional view of the housing and the rear cover in the embodiment of the present invention;

fig. 5 is a schematic structural view of a stator assembly in an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention.

Reference numerals:

100. an oil pump; 200. a filter;

1. a housing; 11. an oil sump; 12. an oil inlet channel; 13. an oil outlet channel; 14. an oil return passage;

2. an end cap;

3. a rotor assembly; 31. a rotor shaft; 32. a rotor core; 33. a first oil passage;

4. a stator assembly; 41. a stator core; 42. a stator winding; 43. an annular oil path; 44. an axial oil path;

5. a first oil ring; 51. a third oil passage;

6. an oil guide pipe;

7. a bearing;

8. a second oil ring; 81. a fourth oil passage;

9. a heat sink.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings, and are only for convenience of description and simplification of operation, but 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 thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The existing motor cooling usually adopts a cooling fan and a shell for radiation, the radiation mode has better surface radiation effect on the motor, but for high-heating parts such as a stator and a rotor in the motor, for example, when the motor runs at a low speed, the stator generates heat greatly; when the motor operates at high speed, the heat generation of the rotor increases sharply. If the heat generated by the components cannot be effectively cooled, the running reliability and stability of the motor are poor, and the working efficiency of the motor is influenced, so that the reliable and stable running of the automobile is influenced. To this, this embodiment provides an oil-cooled motor, cools off stator module, rotor subassembly and the casing of motor, strengthens the radiating effect of motor, effectively improves the work efficiency of motor to can guarantee the reliable steady operation of car.

As shown in fig. 1 to 6, in the present embodiment, the oil-cooled motor includes a housing 1, an end cover 2, a rotor assembly 3, a stator assembly 4, a first oil ring 5, and an oil guide pipe 6. Wherein, casing 1 has oil catch bowl 11, and casing 1 is provided with oil feed passageway 12, and end cover 2 installs on casing 1, and rotor subassembly 3 rotates and sets up in casing 1, and along rotor subassembly 3's circumferencial direction, rotor subassembly 3 is provided with first oil circuit 33, and the one end of first oil circuit 33 communicates in oil catch bowl 11. Stator module 4 is located casing 1, and stator module 4 is around locating rotor module 3, along stator module 4's periphery direction, is provided with the second oil circuit on stator module 4, and the one end of second oil circuit communicates in oil feed passageway 12, and first oil ring 5 is located between end cover 2 and stator module 4. The first oil ring 5 is sleeved on the rotor assembly 3, the first oil ring 5 is provided with a third oil path 51, two ends of the third oil path 51 are respectively communicated with the oil collecting tank 11 and the other end of the second oil path, the oil guide pipe 6 is arranged inside the rotor assembly 3, and two ends of the oil guide pipe 6 are respectively communicated with the oil inlet channel 12 and the other end of the first oil path 33. Specifically, the rear portion of the casing 1 is connected with the end cover 2, the bottom of the casing 1 is provided with the oil collecting tank 11, the inside of the casing 1 is provided with the rotor assembly 3 and the stator assembly 4, one end of the second oil path and one end of the oil guide pipe 6 are both communicated with the oil inlet channel 12, the other end of the second oil path and the other end of the oil guide pipe 6 are respectively communicated with the third oil path 51 and the first oil path 33, and the first oil path 33 and the third oil path 51 are both communicated with the oil collecting tank 11. The oil-cooled motor mainly comprises two oil paths, wherein one oil path is used for cooling oil to enter from the oil inlet channel 12, then the cooling oil flows through a second oil path arranged on the stator assembly 4 and a third oil path 51 arranged on the first oil ring 5 to cool the stator assembly 4, and finally the cooling oil returns to the oil collecting tank 11; the other oil path is that cooling oil enters from the oil inlet channel 12, then enters the oil guide pipe 6 between the end cover 2 and the shell 1 to cool the interior of the rotor assembly 3, then carries out oil throwing cooling on the exterior of the rotor assembly 3, the inner side of the stator assembly 4 and the shell 1 through the first oil path 33, and finally returns to the oil collecting groove 11. The stator assembly 4, the rotor assembly 3 and the shell 1 of the motor are cooled by using the cooling oil, the heat dissipation effect of the motor is enhanced, the working efficiency of the motor is effectively improved, and therefore the reliable and stable operation of the automobile can be guaranteed. Optionally, a high-voltage cover plate, a low-voltage plug connector and a rotary transformer cover plate are fixedly connected to the end cover 2, and the rotary transformer assembly is located between the end cover 2 and the rotary transformer cover plate and fixed on the rotor shaft 31.

Further, with continued reference to fig. 1 to fig. 6, the rotor assembly 3 includes a rotor shaft 31 rotatably connected to the housing 1 and a rotor core 32 fixedly sleeved on the rotor shaft 31, a plurality of first oil paths 33 are provided, the plurality of first oil paths 33 are arranged at intervals along the circumferential direction of the rotor shaft 31, and the oil inlet channel 12 is communicated with the inside of the rotor shaft 31 through the oil guide tube 6. Specifically, the rotor core 32 and the rotor shaft 31 are connected by a flat key, and the cooling oil enters the inside of the rotor shaft 31 through the oil guide pipe 6 and is sprayed to the stator windings 42 of the stator assembly 4 through the plurality of first oil paths 33 for cooling.

Further, with continued reference to fig. 1 to 6, the oil-cooled motor further includes a bearing 7, the bearing 7 is sleeved on the rotor shaft 31, an outer ring of the bearing 7 is fixedly connected with the stator assembly 4, and along an axial direction of the rotor shaft 31, a part of the first oil passages 33 of the plurality of first oil passages 33 is located on one side of the bearing 7, and another part of the first oil passages 33 is located on the other side of the bearing 7. Specifically, there are two bearings 7, the two bearings 7 are respectively disposed at two ends of the rotor shaft 31, bushings are respectively fixed between the housing 1 and the two bearings 7, and the cooling oil located inside the rotor shaft 31 is thrown to the bearings 7 through the first oil path 33 for cooling.

Further, with continued reference to fig. 1 to 6, the housing 1 is also provided with an oil return passage 14, and the first oil passage 33 is provided in communication with the oil sump 11 through the oil return passage 14. Specifically, the third oil passage 51 on the first oil ring 5 directly communicates with the oil sump 11, and the first oil passage 33 on the rotor shaft 31 is provided in communication with the oil sump 11 through the oil return passage 14, i.e., the cooling oil of the first oil passage 33 needs to flow into the oil sump 11 through the oil return passage 14, while the third oil passage 51 does not need to flow directly into the oil sump 11 through the oil return passage 14.

Further, with continued reference to fig. 1 to 6, the oil-cooled motor further includes a second oil ring 8, the second oil ring 8 is located between the housing 1 and the stator assembly 4, the second oil ring 8 is sleeved on the rotor assembly 3, the second oil ring 8 is provided with a fourth oil path 81, and the fourth oil path 81 is communicated with the oil collecting tank 11 through the oil return channel 14. Specifically, a second oil ring 8 is fixedly connected between the inside of the front end of the housing 1 and the stator assembly 4, two oil return channels 14 are arranged at the front end of the housing 1 and are both communicated with the oil collecting tank 11, the cooling oil of the first oil path 33 flows into the oil collecting tank 11 through one of the oil return channels 14, and the cooling oil of the fourth oil path 81 flows into the oil collecting tank 11 through the other oil return channel 14.

Further, with continued reference to fig. 1-6, the stator assembly 4 includes a stator core 41 and a stator winding 42, the stator core 41 is disposed on the rotor assembly 3, the stator core 41 is in interference fit with the housing 1, the stator winding 42 is wound on an inner wall of the stator core 41, and the stator winding 42 is disposed in a flat line shape. Specifically, the oil-cooled motor adopts the flat wire type stator winding 42, increases the slot filling rate, improves the power density of the motor, and has the advantages of high continuous power, high efficiency and low cost.

Further, with continued reference to fig. 1 to 6, the second oil path includes an annular oil path 43 and an axial oil path 44, the axial oil path 44 and the annular oil path 43 are respectively disposed on the outer wall of the stator core 41 along the axial direction and the circumferential direction of the casing 1, the axial oil path 44 is communicated with the oil inlet channel 12 through the annular oil path 43, and the axial oil path 44 is used for spray-cooling the stator winding 42. Specifically, an annular oil passage is provided at a middle position of the outer peripheral surface of the stator core 41, a plurality of axial oil passages 44 are provided on both sides of the annular oil passage, the plurality of axial oil passages 44 are provided at intervals in the circumferential direction of the stator core 41, the cooling oil of the annular oil passage flows through the plurality of axial oil passages 44 to cool the stator core 41, and the third oil passage 51 and the fourth oil passage 81 provided by the first oil ring 5 and the second oil ring 8 are provided in communication with the axial oil passages 44 and sprayed to the stator winding 42 to be cooled.

Further, with continued reference to fig. 1-6, the oil-cooled motor further includes a radiator 9, the radiator 9 is disposed on the casing 1, the casing 1 is further provided with an oil outlet channel 13, and the oil inlet channel 12 and the oil outlet channel 13 are both located in the radiator 9. Specifically, the side of the housing 1 is provided with the radiator 9, the oil outlet channel 13 can discharge cooling oil, and the cooling oil in the oil inlet channel 12 and the oil outlet channel 13 is cooled by the radiator 9. A filter 200 and an oil pump 100 are arranged at the front lower part of the shell 1, the oil collecting tank 11 is communicated with the filter 200, the filter 200 is communicated with the oil pump 100, the oil pump 100 is communicated with the oil inlet channel 12, and cooling oil supplies and filters the interior of the motor through the action of the oil pump 100 and the filter 200.

The embodiment also provides a vehicle comprising the oil-cooled motor. This oil-cooled motor can cool off the casing 1 of the inside stator module 4 of motor, rotor subassembly 3 and motor through the coolant oil, strengthens the radiating effect of motor, effectively improves the work efficiency of motor to can guarantee the reliable steady operation of vehicle.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. Oil-cooled motor, its characterized in that includes:

the oil collecting device comprises a shell (1) and a control device, wherein the shell (1) is provided with an oil collecting groove (11), and an oil inlet channel (12) is formed in the shell (1);

an end cap (2) mounted on the housing (1);

the rotor assembly (3) is rotatably arranged in the shell (1), and a first oil path (33) is formed in the rotor assembly (3) along the circumferential direction of the rotor assembly (3), and one end of the first oil path (33) is communicated with the oil collecting groove (11);

the stator assembly (4) is positioned in the shell (1), the stator assembly (4) is wound on the rotor assembly (3), a second oil path is arranged on the stator assembly (4) along the peripheral direction of the stator assembly (4), and one end of the second oil path is communicated with the oil inlet channel (12);

the first oil ring (5) is positioned between the end cover (2) and the stator assembly (4), the rotor assembly (3) is sleeved with the first oil ring (5), a third oil path (51) is formed in the first oil ring (5), and two ends of the third oil path (51) are respectively communicated with the oil collecting groove (11) and the other end of the second oil path;

and the oil guide pipe (6) is arranged in the rotor assembly (3), and two ends of the oil guide pipe (6) are respectively communicated with the oil inlet channel (12) and the other end of the first oil way (33).

2. The oil-cooled motor according to claim 1, wherein the rotor assembly (3) includes a rotor shaft (31) rotatably connected to the housing (1) and a rotor core (32) fixedly secured to the rotor shaft (31), the number of the first oil passages (33) is plural, the plural first oil passages (33) are provided at intervals in a circumferential direction of the rotor shaft (31), and the oil inlet passage (12) is provided to communicate with an inside of the rotor shaft (31) through the oil guide pipe (6).

3. The oil-cooled motor according to claim 2, further comprising a bearing (7), wherein the bearing (7) is sleeved on the rotor shaft (31), an outer ring of the bearing (7) is fixedly connected with the stator assembly (4), and along an axial direction of the rotor shaft (31), a part of the first oil passages (33) of the plurality of first oil passages (33) is located on one side of the bearing (7), and the other part of the first oil passages (33) is located on the other side of the bearing (7).

4. An oil-cooled electric machine according to claim 1, characterized in that the housing (1) is further provided with an oil return channel (14), and the first oil passage (33) is provided in communication with the oil sump (11) through the oil return channel (14).

5. The oil-cooled motor according to claim 4, further comprising a second oil ring (8), wherein the second oil ring (8) is located between the housing (1) and the stator assembly (4), the second oil ring (8) is sleeved on the rotor assembly (3), the second oil ring (8) is provided with a fourth oil path (81), and the fourth oil path (81) is communicated with the oil collecting groove (11) through the oil return channel (14).

6. The oil-cooled motor according to claim 1, wherein the stator assembly (4) comprises a stator core (41) and stator windings (42), the stator core (41) is disposed on the rotor assembly (3), the stator core (41) is in interference fit with the housing (1), the stator windings (42) are wound on an inner wall of the stator core (41), and the stator windings (42) are arranged in a flat line shape.

7. The oil-cooled motor according to claim 6, wherein the second oil path comprises an annular oil path (43) and an axial oil path (44), the axial oil path (44) and the annular oil path (43) are respectively arranged on the outer wall of the stator core (41) along the axial direction and the circumferential direction of the housing (1), the axial oil path (44) is communicated with the oil inlet channel (12) through the annular oil path (43), and the axial oil path (44) is used for spray-cooling the stator winding (42).

8. The oil-cooled motor according to claim 7, wherein the number of the axial oil passages (44) is plural, and the plural axial oil passages (44) are provided at intervals in a circumferential direction of the stator core (41).

9. The oil-cooled motor according to claim 1, further comprising a radiator (9), wherein the radiator (9) is disposed on the housing (1), the housing (1) is further provided with an oil outlet channel (13), and the oil inlet channel (12) and the oil outlet channel (13) are both located in the radiator (9).

10. Vehicle, characterized in that it comprises an oil-cooled electric machine according to any of claims 1-9.

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