CN212367066U

CN212367066U - Double-cooling-channel motor

Info

Publication number: CN212367066U
Application number: CN202020852213.8U
Authority: CN
Inventors: 韩永杰; 刘钧; 冯颖盈
Original assignee: Shanghai Weimeisi New Energy Co ltd
Current assignee: Shanghai Weimeisi New Energy Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-01-15
Anticipated expiration: 2030-05-20

Abstract

The utility model discloses a two cooling channel motors, include the casing and be located stator module, rotor subassembly, pivot and bearing in the casing, the shell of casing is equipped with the oil duct and the water course that are located same aspect, be equipped with the oil inlet that is used for the oil feed on the oil duct and correspond to stator module's oil-out. The utility model discloses a locate the same aspect of casing shell intraformational with oil duct and water course, make full use of the space of casing itself for the motor volume reduces, saves occupation space.

Description

Double-cooling-channel motor

Technical Field

The utility model relates to the field of electric machines, especially, relate to a two cooling channel motors.

Background

With the technical progress, the new energy automobile industry develops at a high speed, and meanwhile, the market has higher and higher requirements on the performance and the integration level of an electric drive assembly. The motor is used as one of core parts of the new energy automobile, and has important influence on the layout of the new energy automobile industry. The motor for the new energy automobile has the characteristics of high rotating speed and high power density, and has higher requirements on the aspects of reliability, cooling, lubrication and the like. Temperature rise has always been a major difficulty in restricting the relevant performance and volume indexes of electric drive assemblies. In the electric drive assembly, when the drive motor works, the temperature is overhigh, the resistance is increased along with the rise of the winding temperature, the loss is increased, and the efficiency is reduced. Meanwhile, the requirements of the over-high temperature on the insulating material, the temperature-resistant grade of the winding and the bearing are improved, the overall cost is higher, and the product popularization is not facilitated.

Common cooling methods of a high-power motor used on an electric automobile or a hybrid electric automobile at present are water cooling and oil cooling. In a water cooling common mode of the motor, a water channel and a water inlet and a water outlet communicated with the cooling water channel are arranged on the shell, and water flow takes away heat through the cooling water channel in the shell. The cooling method of the motor has poor heat dissipation effect, and heat generated by the coil winding and the magnetic steel is not easy to transfer to the shell due to the problems of distance and insulating medium.

At present, the cooling of a motor mainly depends on circulating cooling liquid in a water jacket to cool a stator, and a winding is cooled by natural heat dissipation and is not directly cooled; or an oil pump is used as oil power, and a part of oil passages are arranged in the motor to directly cool the motor and all parts. The common oil cooling mode of the high-power motor is as follows: the cooling oil is injected into the inner cavity of the motor through the heat dissipation channel, and is sprayed at the end part of the stator or the bearing through a pipeline, but sufficient cooling is difficult to ensure, a heat island is easy to exist, and the temperature rise consistency is poor.

The prior art provides a double cooling method of oil cooling and water cooling, and there is a cooling water channel in the casing, and there is a cooling oil duct outside or inside, and introduces oil to the stator winding end and directly cools the winding, but the prior art has the following problems at least: increase the casing volume or increase whole envelope volume to make the cost increase great, need leave sufficient clearance installation oil spout accessory and sufficient electric distance between the casing simultaneously and further increased the casing volume, need occupy more space.

Therefore, it is an urgent technical problem to design a housing with space saving and good cooling effect.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the heat dissipation of casing and volume can not compromise among the prior art, the utility model provides a two cooling channel motors.

The utility model provides a two cooling channel motors, include the casing and be located casing inner chamber's stator module, rotor subassembly, pivot and bearing, the shell of casing is equipped with the oil duct and the water course that are located same aspect, be equipped with the oil inlet that is used for the oil feed on the oil duct and correspond to stator module's oil-out.

In an embodiment, the casing includes a main casing and end covers located at two ends of the main casing, the oil passages include a first oil passage, and a first oil inlet and a first oil outlet provided in the first oil passage, and the first oil passage is located in a shell layer of an upper half portion of the main casing.

In one embodiment, the first oil passage comprises a plurality of axial oil passages, and the plurality of axial oil passages are communicated with each other through a transition oil passage.

In one embodiment, the transition oil passage is provided on the main casing or the end cover.

In one embodiment, the bottom of the casing further comprises an oil return port for discharging oil.

In one embodiment, the oil injection device further comprises an oil injection accessory communicated with the oil outlet, and an oil injection port corresponding to the stator assembly is formed in the oil injection accessory.

In one embodiment, the end cover includes a front end cover located in the output direction of the rotating shaft and a rear end cover located in the opposite direction of the output direction of the rotating shaft, and the rear end cover is provided with a second oil passage communicated with the first oil passage; the rear end cover is provided with a cover plate, and the cover plate is provided with a third oil duct communicated with the second oil duct; the rotating shaft is provided with a fourth oil duct communicated with the third oil duct, and the fourth oil duct is provided with an oil outlet.

In an embodiment, a fifth oil duct is arranged on the front end cover, and the fifth oil duct is provided with a second oil inlet for oil inlet and a second oil outlet for outputting oil to the first oil duct.

In one embodiment, the water channels are distributed in a shell layer of the lower half part of the main shell in an axial zigzag mode.

In one embodiment, a portion of the water channel is located at a bottom of the housing for removing heat from oil falling into the interior of the housing.

Compared with the prior art, the utility model discloses at least, following advantage has:

firstly, through locating oil duct and water course the same aspect in the casing shell, compare in traditional art and locate different aspect with water course and oil duct, make full use of the space of casing itself for the motor volume reduces, saves occupation space. Then, the oil injection accessory in the traditional technology is changed into an oil outlet, so that the volume of the motor is further reduced. Secondly, through being equipped with a plurality of oil ducts in the shell of casing and linking to each other through excessive oil duct, promoted the radiating effect of motor. Finally, a part of the water channel is positioned at the bottom of the shell and used for taking away heat of oil falling into the inner cavity of the shell, and the heat dissipation effect of the motor is further improved.

Drawings

Fig. 1 is a schematic cross-sectional view of a dual cooling channel motor structure according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a dual cooling channel motor structure according to another embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a main housing of the dual cooling channel motor of FIG. 1 or FIG. 2;

FIG. 4 is a left side view of the main housing structure of the dual cooling channel motor of FIG. 1 or FIG. 2;

fig. 5 is a right side view of the main housing structure of the dual cooling channel motor of fig. 1 or 2.

Description of reference numerals: 1. a main housing; 11. a first oil passage; 111. a first oil inlet; 112. a first oil outlet; 12. oil injection accessories; 121. an oil injection port; 13. a water channel; 131. a water inlet; 132. a water outlet; 2. a front end cover; 21. a second oil inlet; 22. a second oil outlet; 23. an oil return port; 3. a rear end cap; 31. a second oil passage; 32. an oil return port; 4. a bearing; 5. a rotating shaft; 51. a fourth oil passage; 52. an oil outlet hole; 6. a rotor assembly; 7. a stator assembly; 71. an end winding; 8. a cover plate; 81. a third oil passage.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1 and 3-5, the present invention provides a dual cooling channel motor, which includes a housing, and a stator assembly 7, a rotor assembly 6, a rotating shaft 5 and a bearing 4 located in an inner cavity of the housing. An oil duct and a water channel 13 which are positioned on the same layer are arranged in the shell layer of the casing, and an oil inlet for oil inlet and an oil outlet corresponding to the stator assembly 7 are arranged on the oil duct. Compare locate the casing in traditional technique in the outer or in the casing with oil duct or water course 13, the utility model discloses locate oil duct and water course 13 in the shell of casing, and locate same aspect with oil duct and water course 13, utilized the space of casing shell itself effectively, reduced the volume of whole motor or the envelope volume of whole motor, saved the space. The respective parts of the double cooling passage motor will be described in detail below.

The casing includes main casing 1 and is located the end cover of main casing 1 both ends, and the shell layer of casing is including the inner shell layer towards the casing inner chamber and the outer shell layer towards the external world. The motor end cover comprises a front end cover 2 positioned in the output direction of the motor rotating shaft 5 and a rear end cover positioned in the opposite direction of the output direction of the rotating shaft 5. The main shell 1 is approximately hollow cylindrical, and the end cover is approximately circular. And a bearing 4 chamber is formed in the center of the front end cover 2 and the center of the rear end cover, and the bearing 4 chamber is used for mounting a bearing 4. The rotation shaft 5 passes through the bearing 4 to facilitate rotation. The rotor assembly 6 is mounted around the rotating shaft 5, and the stator assembly 7 is mounted around the inner wall of the main casing 1.

The water channels 13 are distributed in the shell layer of the lower half portion of the main shell 1 (see fig. 3), the water channels 13 include a plurality of axial water channels parallel to the rotating shaft 5 and transition water channels communicating with the plurality of axial water channels, and the water channels 13 are distributed in an axial zigzag shape. The outer shell of the main shell corresponding to the water channel 13 is provided with a water inlet 131 and a water outlet 132 (see fig. 4-5). A part of the water channel 13 is located at the bottom of the housing 1 to remove heat from the oil falling into the inner cavity of the housing 1. In other embodiments, a portion of the water channel 13 is adjacent to a portion of the oil passage to achieve heat exchange between the oil passage and the water channel 13. Namely, the water channel 13 is used as a radiator of the bottom or oil channel of the machine shell 1 to take away heat of oil falling into the inner cavity of the machine shell 1 or the oil in the oil channel.

In an embodiment, the oil passages include a first oil passage 11, the first oil passage 11 is disposed in a shell layer of the upper half portion of the main casing 1 (see fig. 3), the first oil passage 11 includes a plurality of axial oil passages parallel to the rotating shaft 5 and a transition oil passage communicating with the plurality of axial oil passages, and the first oil passage 11 is distributed in the upper half portion of the main casing 1 in an axial zigzag manner. The first oil duct 11 is provided with a first oil inlet 111 and a first oil outlet 112, the first oil inlet 111 is opened on an outer shell layer of the main shell 1 right above the first oil duct 11, and the first oil outlet 112 is opened on an inner shell layer of the main shell 1 right below the first oil duct 11. One first oil inlet 111 is provided, and the first oil inlet 111 is specifically opened at the middle position of the first oil passage 11 and the main casing 1. The first oil inlet 111 is used for communicating with an external power device, and the external power device provides pressure for oil to enter the first oil passage 11. Two first oil outlets 112 are provided, specifically, are respectively opened on the inner shell layer of the main shell 1 corresponding to the end windings 71 at the two ends of the stator assembly 7. The first oil outlet 112 is used for spraying oil to the end windings 71 at both ends of the stator assembly 7 so as to cool the end windings 71 at both ends of the stator assembly 7. The bottom of the rear end cover is provided with an oil return port 32, and the lower hole surface of the oil return port 32 is flush with the inner shell layer at the bottom of the main shell 1, so that oil can be discharged well. After the oil is sprayed to and cools the end windings 71 at the two ends of the stator assembly 7 through the first oil outlet 112, the oil falls into the bottom of the inner cavity of the machine shell, and then the oil is discharged out of the machine shell through the oil return port 32.

In another embodiment, the transition oil passage is provided on the end cap.

In another embodiment, the oil spraying device further comprises an oil spraying accessory 12 communicated with the oil outlet, and the oil spraying accessory 12 is provided with an oil spraying port 121 corresponding to the stator assembly 7. The oil flows to the oil injection accessories 12 from the oil outlet, and then is sprayed to the end windings 71 at the two ends of the stator assembly 7 from the oil injection accessories 12.

Referring to fig. 2, in another embodiment, a cover plate 8 is disposed at the chamber of the shaft 5 of the rear end cover, and the cover plate 8 is used for blocking the shaft 5 and the chamber of the shaft 5. The rear end cover is provided with a second oil channel communicated with the first oil channel 11, the cover plate 8 is provided with a third oil channel 81 communicated with the second oil channel, the rotating shaft 5 is provided with a fourth oil channel 51 communicated with the third oil channel 81, the fourth oil channel 51 is provided with an oil outlet 52, and the oil outlet 52 is aligned to the bearing 4 at an inclined angle. After a part of the oil in the first oil passage 11 flows to the third oil passage 81 through the second oil passage and flows to the fourth oil passage 51, the oil is thrown to the bearing 4 through the oil outlet 52 under the action of centrifugal force when the rotating shaft 5 rotates, so that the bearing 4 is lubricated and cooled. This oil falls into the bottom of the housing cavity and is discharged out of the housing through the oil return port 32.

In another embodiment, the front end cover 2 of the casing is connected to the reduction gearbox housing, and the front end cover 2 is provided with a fifth oil passage, and the fifth oil passage is provided with a second oil inlet 21 for oil inlet and a second oil outlet 22 for outputting oil to the first oil passage 11. The second oil inlet 21 is communicated with the reduction gearbox, and oil provided by the reduction gearbox enters the first oil channel 11 from the second oil inlet 21. In this embodiment, the oil return port 23 is disposed at the bottom of the front end cover 2, and the lower hole surface of the oil return port 23 is flush with the inner shell layer at the bottom of the main shell 1, so as to better discharge oil. Oil enters the first oil duct 11 from the reduction gearbox through the second oil inlet 21, flows to the second oil duct, flows to the third oil duct 81, flows to the fourth oil duct 51, is sprayed to the end windings 71 at the two ends of the stator assembly 7 and the bearing 4, falls into the bottom of the inner cavity of the machine shell, and is discharged out of the machine shell through the oil return port 23. In the embodiment, the water flow in the water channel 13 or the height of the oil return port 23 can be adjusted, and the heat of partial oil is taken away through the water channel 13, so that additional heat exchangers are not required to be arranged to cool the oil in the reduction gearbox, elements are saved, the size of the motor is further reduced, and the occupied space is saved.

firstly, through locating oil duct and water course 13 in the same aspect of casing shell, compare in traditional art and locate different aspect with water course 13 and oil duct or locate the casing outside or the casing inner chamber with the oil duct, make full use of the space of casing shell itself for the motor volume reduces, saves occupation space. Then, by changing the oil injection attachment 12 in the conventional art to the oil outlet, the motor volume is further reduced. Secondly, through being equipped with a plurality of oil ducts in the shell of casing and linking to each other through excessive oil duct, promoted the radiating effect of motor. Finally, a part of the water channel 13 is arranged at the bottom of the machine shell 1 to take away heat of oil falling into the inner cavity of the machine shell 1, and the heat dissipation effect of the motor is further improved.

The foregoing examples are illustrative only and are not intended to be limiting. Any equivalent modifications or variations without departing from the spirit and scope of the present application should be included in the claims of the present application.

Claims

1. The double-cooling-channel motor comprises a machine shell, and a stator assembly, a rotor assembly, a rotating shaft and a bearing which are positioned in an inner cavity of the machine shell.

2. The motor of claim 1, wherein the housing includes a main casing and end covers at both ends of the main casing, the oil passages include a first oil passage and a first oil inlet and a first oil outlet provided in the first oil passage, and the first oil passage is located in a shell layer of an upper half of the main casing.

3. The dual cooling channel electric machine of claim 2, wherein the first oil passage includes a plurality of axial oil passages that communicate therebetween via a transition oil passage.

4. The dual cooling channel electric machine of claim 3, wherein the transition oil passage is provided on the main casing or the end cap.

5. The double cooling passage motor of any one of claims 1 to 4, wherein the bottom of the case further comprises an oil return port for discharging oil.

6. The dual cooling channel motor of claim 5, further comprising an oil injection accessory communicated with the oil outlet, wherein the oil injection accessory is provided with an oil injection port corresponding to the stator assembly.

7. The motor of claim 2, wherein the end cover comprises a front end cover located in the output direction of the rotating shaft and a rear end cover located in the opposite direction of the output direction of the rotating shaft, and the rear end cover is provided with a second oil passage communicated with the first oil passage; the rear end cover is provided with a cover plate, and the cover plate is provided with a third oil duct communicated with the second oil duct; the rotating shaft is provided with a fourth oil duct communicated with the third oil duct, and the fourth oil duct is provided with an oil outlet.

8. The motor with two cooling channels according to claim 7, wherein a fifth oil channel is arranged on the front end cover, and the fifth oil channel is provided with a second oil inlet for oil inlet and a second oil outlet for outputting oil to the first oil channel.

9. The dual cooling channel electric machine of claim 2, wherein the water channels are distributed axially in a zigzag pattern in the lower half of the shell of the main shell.

10. The dual cooling channel motor of claim 9, wherein a portion of the water channel is located at a bottom of the housing for removing heat from oil falling into the interior cavity of the housing.