CN114069916A

CN114069916A - Combined oil-cooled motor system

Info

Publication number: CN114069916A
Application number: CN202010789627.5A
Authority: CN
Inventors: 胡凯俊; 应红亮; 张舟云; 段磊; 闫兵; 陈红梅; 陈中贤
Original assignee: Shanghai Auto Edrive Co Ltd; Shanghai Auto Edrive Engineering Technology Research Center; Shanghai Edrive Co Ltd
Current assignee: Shanghai Auto Edrive Co Ltd; Shanghai Auto Edrive Engineering Technology Research Center; Shanghai Edrive Co Ltd
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2022-02-18

Abstract

The invention relates to a combined oil-cooled motor system which comprises a shell, a rotor assembly and a stator assembly, wherein the rotor assembly and the stator assembly are arranged in the shell, the two ends of the shell are respectively provided with an end shell and a cover plate assembly, the stator assembly comprises a stator punching sheet assembly and a sealing gasket, the stator punching sheet assembly is provided with a plurality of stator oil ducts which are distributed in the circumferential direction and run through in the axial direction, the sealing gaskets are respectively assembled at the two ends of the stator oil ducts in an aligned mode, and the stator assembly and the shell are assembled in an aligned mode and fixed in the circumferential direction. Compared with the prior art, the motor stator assembly and the rotor assembly are integrally cooled and lubricated in series, the whole system is highly integrated in structure, and the motor stator assembly and the rotor assembly are comprehensive, efficient and strong in functionality compared with the existing motor cooling and lubricating mode.

Description

Combined oil-cooled motor system

Technical Field

The invention relates to the technical field of motor cooling and lubricating systems, in particular to a combined oil-cooled motor system.

Background

The driving motor is taken as a core product of a three-electrical system of a new energy automobile, the system efficiency and the product reliability of the driving motor are concerned, and especially under the development background of high-power and high-rotation-speed electric driving systems, the cooling heat dissipation and lubrication reliability of the motor become important problems at present.

At present, in the industry, a water cooling mode is mostly adopted for a driving motor for a new-energy vehicle, a grease lubrication bearing is selected for the bearing type, the motor is connected with a cooling system of the whole vehicle through a reserved water pipe joint, the heat dissipation balance of the motor during working is ensured, the efficiency of the water cooling heat dissipation mode is lower, the application is limited under extreme climate and working condition conditions, the use condition and the high-power expansion of the motor are restrained, the grease lubrication bearing also limits the high-rotating-speed application of the motor, the maintenance is difficult, and the reliability increase and the quality improvement of the motor are not facilitated.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a combined oil-cooled motor system.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a modular oil-cooled motor system, includes the casing and sets up rotor assembly, the stator assembly in the casing, the both ends of casing are equipped with tip casing and apron subassembly respectively, the stator assembly includes stator towards piece subassembly and sealed the pad, stator towards piece subassembly is equipped with many stator oil ducts that circumference distributes and axial link up, sealed pad is adjusted the assembly well at stator oil duct both ends respectively, stator assembly is adjusted the assembly well with the casing and is fixed along circumference.

Preferably, the end portion shell is provided with an oil inlet and an oil outlet, a first oil return cavity is arranged on the inner side along the circumferential direction, the first oil return cavity is provided with a plurality of first oil injection holes which penetrate through the first oil return cavity and are distributed along the circumferential direction, the oil inlet is communicated with one of the stator oil ducts, and the first oil return cavity is communicated with the other stator oil ducts.

Preferably, the end shell is of an integrated structure, the end shell and the shell are aligned and locked and assembled, a gap is formed between the end shell and the stator punching sheet assembly after locking, and the end shell and the stator punching sheet assembly are sealed by the sealing gasket.

Preferably, a second oil return cavity which is communicated with the stator oil duct in a centering manner is arranged in the casing along the circumferential direction, the second oil return cavity is provided with a plurality of second oil injection holes which penetrate through the second oil return cavity and are distributed along the circumferential direction, the second oil return cavity is communicated with the combined oil duct through an oil outlet cavity, and the combined oil duct is communicated with a cover plate oil cavity of the cover plate assembly.

Preferably, an oil return groove is axially formed in the inner side of the machine shell and communicated with the oil outlet, and an oil leakage hole is formed in the end portion of the machine shell.

Preferably, the casing is of an integrated structure.

Preferably, two ends of the stator oil duct are respectively and correspondingly communicated with the flow channels of the first oil return cavity and the second oil return cavity to form a bent annular flow channel together.

Preferably, the rotor assembly comprises a rotor sheet component, a rotor end plate, a rotating shaft, a sealing plug and a bearing, the rotor assembly is assembled with the end part shell through the bearing, and the rotor end plates are respectively assembled at two ends of the rotor sheet component and fixed on the rotating shaft together with the rotor sheet component; the rotor end plate is provided with an end plate oil duct, the rotating shaft is provided with an oil storage cavity, a bearing oil duct and a radial hole, the bearing oil duct is communicated with the oil storage cavity and points to the bearing, the end plate oil duct is communicated with the oil storage cavity through the radial hole, and the sealing plug is sealed at the spline end of the oil storage cavity.

Preferably, the cover plate assembly comprises a rotary variable cover plate and an oil seal, the oil seal is fixedly assembled on the rotary variable cover plate and sealed with a rotating shaft of the rotor assembly, the rotary variable cover plate is provided with a cover plate oil cavity, and the cover plate oil cavity is communicated with an oil storage cavity of the rotating shaft and is communicated with an oil outlet cavity in the casing through a combined oil duct.

Preferably, when the motor system is horizontally arranged, the oil return groove and the oil leakage hole are arranged below the machine shell, and all oil finally flows to the oil return groove under the action of gravity.

Compared with the prior art, the invention has the following advantages:

(1) the oil-cooled lubrication system of the combination formula of stator assembly and rotor assembly has been realized establishing ties simultaneously to preferentially to the stator assembly cooling, the entire system structure adopts the initiative cooling lubrication mode, and the cooling lubrication efficiency is not restricted by the motor speed and is realized full-time cooling lubrication work, and the good reliability, the high integration of entire system structure, it is comprehensive high-efficient than current motor cooling lubrication mode, functional strong.

(2) Direct oil cooling of stator assembly, cooling efficiency has very big improvement than current water-cooling mode, because stator assembly adopts the stator oil duct that link up and two side oil spout designs for stator assembly cooling is direct more comprehensive, and simple structure manufacturability is high.

(3) The rotor assembly adopts the design of oil-cooled lubrication structure, when further improving motor radiating efficiency, promotes bearing lubrication performance for the motor high-speed application can realize.

(4) The end shell and the shell are integrally designed and manufactured, and are aligned and assembled with the stator assembly through the sealing gasket, and the end shell and the shell have the advantages of being high in sealing performance, high in system structure integration level and good in assembling performance. If the end shell and the reducer shell are designed to be the same shell, the reducer shell can be further cooled.

(5) The oil is introduced into the motor, the stator and rotor heating part is directly cooled, and the bearing is sprayed with oil, so that real-time cooling and lubrication of a motor product are realized.

Drawings

FIG. 1 is an exploded view of the motor system of the present invention;

FIG. 2 is a cross-sectional view at one angle of the present invention;

FIG. 3 is a cross-sectional view of another angle of the present invention;

FIG. 4 is a schematic view of a stator assembly according to the present invention;

FIG. 5 is a schematic view of the structure of the housing of the present invention;

FIG. 6 is a schematic view of an end shell construction according to the present invention;

fig. 7 is a schematic model of the flow passage of the cooling and lubricating system of the present invention.

Wherein, 1 is an end shell, 1-1 is an oil inlet, 1-2 is a first oil injection hole, 1-3 is a first oil return cavity, and 1-4 is an oil outlet; 2, a rotor assembly, 2-1, a rotor punching sheet component, 2-2, a rotor end plate, 2-2-1, an end plate oil duct, 2-3, a rotating shaft, 2-3-1, a bearing oil duct, 2-3-2, a radial hole, 2-3-3, an oil storage cavity, 2-4, a bearing and 2-5 are sealing plugs; 3 is a stator assembly, 3-1 is a stator punching sheet assembly, 3-1-1 is a stator oil duct, and 3-2 is a sealing gasket; 4 is a machine shell, 4-1 is a second oil return cavity, 4-2 is a second oil injection hole, 4-3 is an oil outlet cavity, 4-4 is a composite oil channel, 4-5 is an oil return groove, and 4-6 is an oil leakage hole; 5 is a cover plate component, 5-1 is a rotary variable cover plate, 5-1-1 is a cover plate oil cavity, and 5-2 is an oil seal.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

In order to adapt to the development trend of high power and high rotating speed of a driving motor for a new energy vehicle and further expand the use working condition of the motor, the application provides a combined oil-cooled motor system, oil is introduced into the motor to directly cool a heating part of a stator and a rotor, and oil is sprayed to a bearing at the same time, so that the real-time cooling and lubrication of a motor product are realized; the whole system is compact and simple in structure, all parts are designed, manufactured and applied in a modularized mode, the whole cooling and lubricating system is orderly connected in series, the requirements of the cooling and lubricating functions of the motor are synchronously met, and technical conditions are provided for the motor to be applied to high power and high speed.

Examples

As shown in fig. 1 to 3, a combined oil-cooled motor system mainly includes an end casing 1, a rotor assembly 2, a stator assembly 3, a casing 4 and a cover plate assembly 5, wherein the stator assembly 3 may be first installed in the casing 4, then installed in the rotor assembly 2, then installed in the end casing 1 and locked, and finally installed in other accessories and assembled with the cover plate assembly 5.

As shown in fig. 2-4, a stator punching component 3-1 in a stator assembly 3 is pressed into a casing 4 in an aligned manner and fixed along the circumferential direction, so that a stator oil duct 3-1-1 is communicated with a second oil return cavity 4-1 and an oil outlet cavity 4-3 in an aligned manner, and a sealing gasket 3-2 seals an assembly end face. And the stator assembly 3 and the shell 4 are assembled and sealed, wherein the stator oil ducts 3-1-1 axially penetrate and are circumferentially distributed along the outer edge of the stator punching component 3-1.

As shown in fig. 2 and 3, the rotor assembly 2 is mounted on the end casing 1 and the casing 4 through bearings 2-4, wherein the rotor end plate 2-2 is assembled at both ends of the rotor sheet assembly 2-1 and is jointly fixed on the rotating shaft 2-3. The end plate oil passage 2-2-1 and the radial hole 2-3-2 are aligned and communicated with the oil storage cavity 2-3-3 and point to the end part of the stator assembly 3. Meanwhile, the bearing oil duct 2-3-1 is communicated with the oil storage cavity 2-3-3 and points to the bearing 2-4.

The cover plate component 5 comprises a rotary variable cover plate 5-1 and an oil seal 5-2, and the oil seal 5-2 is fixedly assembled on the rotary variable cover plate 5-1 and sealed with the rotating shaft 2-3. The rotary variable cover plate 5-1 is provided with a cover plate oil cavity 5-1-1 for communicating the composite oil passage 4-4 and the oil storage cavity 2-3-3, and the cover plate component 5 is communicated with the stator assembly 3 and the rotor assembly 2 to finally form a combined oil cooling system structure. One end of the oil storage cavity 2-3-3 is sealed by a sealing plug 2-5, and the other end is communicated with a cover plate oil cavity 5-1-1 of the cover plate component 5. The cover plate oil cavity 5-1-1 and the rotating shaft 2-3 are sealed through an oil seal 5-2, and the oil seal 5-2 is installed on the rotary variable cover plate 5-1. The shell 4 and the rotor assembly 2 are communicated and sealed through a cover plate component 5, and further the oil storage cavity 2-3-3 and the composite oil channel 4-4 are communicated and sealed through a cover plate oil cavity 5-1-1.

The combined oil-cooled motor systemThe main oil flow paths are as follows: oil inlet 1-1 → stator oil duct 3-1

The oil return cavity → the oil outlet cavity 4-3 → the combined type oil channel 4-4 → the cover plate oil cavity 5-1-1 → the oil storage cavity 2-3-3 → the radial hole 2-3-2, the bearing oil channel 2-3-1, the end plate oil channel 2-2-1, the oil leakage hole 4-6 → the oil return groove 4-5 → the oil outlet 1-4, and the oil return cavity is communicated with the oil injection hole.

As shown in fig. 5, the casing 4 is manufactured by an integrated design, and the main structure of the casing includes a second oil return cavity 4-1, a second oil injection hole 4-2, an oil outlet cavity 4-3, a combined oil passage 4-4, an oil return groove 4-5, and an oil leakage hole 4-6, wherein the second oil injection hole 4-2 is communicated with the second oil return cavity 4-1 and is circumferentially distributed, and oil can be partially ejected from the second oil injection hole 4-2 after passing through the second oil return cavity 4-1 and cools the end of the stator assembly 3. The oil outlet cavity 4-3 is communicated with the composite oil passage 4-4, the composite oil passage 4-4 is communicated with the inside of the shell 4, when the motor is horizontally arranged, the oil return groove 4-5 and the oil leakage hole 4-2 are right below the structure of the shell 4, and all oil can finally flow to the oil return groove 4-5 under the action of gravity.

As shown in FIG. 6, the end housing 1 is manufactured by an integrated design, and the main structure of the end housing comprises an oil inlet 1-1, a first oil injection hole 1-2, a first oil return cavity 1-3 and an oil outlet 1-4. The first oil injection hole 1-2 and the first oil return cavity 1-3 are communicated and distributed along the circumferential direction. The end part shell 1 is assembled in alignment with the machine shell 4 and is sealed by a sealing gasket 3-2, and then the stator oil duct 3-1-1 is communicated with the first oil return cavity 1-3 and the oil inlet 1-1 in alignment. The oil liquid can be sprayed out from the first oil spray hole 1-2 part after passing through the first oil return cavity 1-3 and cools the end part of the stator assembly 3, and the oil outlet 1-4 is communicated with the oil return groove 4-5.

The cooling and lubricating system flow channel model shown in fig. 7 is that the stator oil channel 3-1-1, the first oil return cavity 1-3 and the second oil return cavity 4-1 together form a bent annular flow channel. An oil inlet 1-1 is connected with one end of a stator oil duct 3-1-1 in a sealing way, an oil outlet cavity 4-3 is connected with one end of the stator oil duct 3-1-1 in a sealing way, oil enters an annular flow passage from the oil inlet 1-1 and reaches an oil outlet cavity 4-3, meanwhile, oil is sprayed to the end part of a stator assembly 3 through a first oil spray hole 1-2 and a second oil spray hole 4-2, the oil reaches the oil outlet cavity and reaches an oil storage cavity 2-3-3 through a composite oil duct 4-4 and a cover plate oil cavity 5-1-1, because an active oil pumping mode is used, the oil is sprayed to a bearing 2-4 from the oil storage cavity 2-3-3 through a bearing oil duct 2-3-1, and the oil is sprayed to the end part of the stator assembly 3 through a radial hole 2-3-2 and an end plate oil duct 2-2-1, all sprayed oil flows to an oil return groove 4-5 along the inner wall or an oil leakage hole 4-6 under the action of gravity, and finally flows out through an oil outlet 1-4. So far, fluid flows through whole oil cooling lubricating system structure, realizes high-efficient, full-time, all-round cooling and lubrication function.

Claims

1. The utility model provides a modular oil-cooled motor system, includes casing (4) and rotor assembly (2), stator assembly (3) of setting in casing (4), the both ends of casing (4) are equipped with tip casing (1) and apron subassembly (5) respectively, its characterized in that, stator assembly (3) are including stator towards piece subassembly (3-1) and sealed pad (3-2), stator towards piece subassembly (3-1) is equipped with many stator oil ducts (3-1-1) that circumference distributes and axial link up, sealed pad (3-2) are adjusted well the assembly respectively at stator oil duct (3-1-1) both ends, stator assembly (3) are adjusted well the assembly with casing (4) and are fixed along circumference.

2. The combined oil-cooled motor system according to claim 1, wherein the end housing (1) is provided with an oil inlet (1-1) and an oil outlet (1-4), and is provided with a first oil return chamber (1-3) at the inner side along the circumferential direction, the first oil return chamber (1-3) is provided with a plurality of first oil injection holes (1-2) which penetrate through the first oil return chamber (1-3) and are distributed along the circumferential direction, the oil inlet (1-1) is communicated with one of the stator oil ducts (3-1-1), and the first oil return chamber (1-3) is communicated with the other stator oil ducts (3-1-1).

3. The combined oil-cooled motor system according to claim 1, wherein the end casing (1) is of an integrated structure, the end casing (1) and the housing (4) are aligned and locked to be assembled, and after the end casing (1) and the stator punching assembly (3-1) are locked, a gap is formed between the end casing (1) and the stator punching assembly and is sealed by the sealing gasket (3-2).

4. The combined oil-cooled motor system according to claim 2, wherein a second oil return cavity (4-1) which is centrally communicated with the stator oil duct (3-1-1) is circumferentially arranged in the housing (4), the second oil return cavity (4-1) is provided with a plurality of second oil injection holes (4-2) which penetrate through the second oil return cavity (4-1) and are circumferentially distributed, the second oil return cavity (4-1) is communicated with the combined oil duct (4-4) through an oil outlet cavity (4-3), and the combined oil duct (4-4) is communicated with a cover plate oil cavity (5-1-1) of the cover plate assembly (5).

5. The combined oil-cooled motor system according to claim 4, wherein an oil return groove (4-5) is axially formed in the inner side of the housing (4), the oil return groove (4-5) is communicated with the oil outlet (1-4), and an oil leakage hole (4-6) is formed in the end portion of the housing (4).

6. A combined oil-cooled electric machine system according to claim 4, characterised in that the machine housing (4) is of one-piece construction.

7. The combined oil-cooled motor system according to claim 4, wherein two ends of the stator oil duct (3-1-1) are respectively and correspondingly communicated with the flow channels of the first oil return chamber (1-3) and the second oil return chamber (4-1) to form a bent annular flow channel together.

8. The combined oil-cooled motor system of claim 4, wherein the rotor assembly (2) comprises a rotor sheet assembly (2-1), a rotor end plate (2-2), a rotating shaft (2-3), a sealing plug (2-5) and a bearing (2-4), the rotor assembly (2) is assembled with the end shell (1) through the bearing (2-4), and the rotor end plates (2-2) are respectively assembled at two ends of the rotor sheet assembly (2-1) and fixed on the rotating shaft (2-3) together with the rotor sheet assembly (2-1); the rotor end plate (2-2) is provided with an end plate oil duct (2-2-1), the rotating shaft (2-3) is provided with an oil storage cavity (2-3-3), a bearing oil duct (2-3-1) and a radial hole (2-3-2), the bearing oil duct (2-3-1) is communicated with the oil storage cavity (2-3-3) and points to the bearing (2-4), the end plate oil duct (2-2-1) is communicated with the oil storage cavity (2-3-3) through the radial hole (2-3-2), and the sealing plug (2-5) is sealed at the spline end of the oil storage cavity (2-3-3).

9. The combined oil-cooled motor system of claim 8, wherein the cover plate assembly (5) comprises a rotary variable cover plate (5-1) and an oil seal (5-2), the oil seal (5-2) is fixedly assembled on the rotary variable cover plate (5-1) and sealed with a rotating shaft (2-3) of the rotor assembly (2), the rotary variable cover plate (5-1) is provided with a cover plate oil cavity (5-1-1), and the cover plate oil cavity (5-1-1) is communicated with an oil storage cavity (2-3-3) of the rotating shaft (2-3) and is communicated with an oil outlet cavity (4-3) in the housing (4) through a combined oil duct (4-4).

10. A combined oil-cooled motor system according to claim 5, characterised in that when the motor system is arranged horizontally, the oil return grooves (4-5) and the oil leakage holes (4-6) are arranged below the machine shell (4), and all oil finally flows to the oil return grooves (4-5) through the action of gravity.