CN115425793A

CN115425793A - Oil-cooled motor

Info

Publication number: CN115425793A
Application number: CN202211166373.7A
Authority: CN
Inventors: 李长林; 徐兴明; 曹阳
Original assignee: Nanjing Chervon Automobile Precision Technology Co ltd
Current assignee: Nanjing Chervon Automobile Precision Technology Co ltd
Priority date: 2022-09-23
Filing date: 2022-09-23
Publication date: 2022-12-02

Abstract

The invention discloses an oil-cooled motor which comprises a shell, a front end cover and a rear end cover, wherein the front end cover and the rear end cover are arranged at two ends of the shell, a rotating shaft is arranged in the shell through a bearing, a plurality of groups of rotor cores are arranged around the rotating shaft, a stator core is arranged around the rotor cores, and windings are arranged on the stator cores. The application provides a highly integrated, retrench part kind and reduce the oil-cooled motor of the assembly degree of difficulty.

Description

Oil-cooled motor

Technical Field

The invention relates to the technical field of automobile motors, in particular to an oil-cooled motor.

Background

With the development of new energy automobiles, the requirements of the market on the performance of new energy automobile driving systems are continuously improved. As one of the core components of the drive system, automobile motors are moving toward high power density, high torque density. The traditional water-cooled motor is generally provided with a water channel on a motor shell, and the motor is indirectly cooled in a shell cooling mode, so that the cooling efficiency is not high; the current of the automobile motor is larger and larger, the rotating speed is faster and faster, and the traditional indirect water cooling method can hardly meet the heat dissipation requirement of the automobile motor. The oil has the characteristics of non-magnetic conductivity and non-electric conductivity, so the direct oil cooling technology becomes the mainstream technology of the motor cooling at present, and the cooling stator schemes of the existing oil cooling motor mainly comprise two schemes: one is a plastic oil injection pipe structure, and the oil injection pipe is used as an independent part for spraying and cooling the end part of the winding; the other type is an oil injection ring structure, the oil injection ring is assembled with other parts as an independent part to form an oil injection cavity for spraying and cooling the end part of the winding, and the two schemes have various parts and are difficult to assemble.

Disclosure of Invention

For solving prior art's not enough, this application provides an oil-cooled motor, includes:

a housing having a mounting cavity therein;

the end covers comprise a front end cover and a rear end cover, and the front end cover and the rear end cover are respectively connected to two ends of the shell;

the rotating shaft is arranged in the mounting cavity of the shell through a bearing;

the rotor comprises a plurality of groups of rotor iron cores arranged around the rotating shaft;

the stator comprises a stator core arranged around the outer side of the rotor core, and a winding is further arranged on the stator core;

the winding structure comprises a shell, a front end cover, a rear end cover, a first oil injection hole, a second oil injection hole, a first oil injection hole and a second oil injection hole, wherein the shell is provided with an oil inlet, the front end cover and the rear end cover are respectively provided with an oil outlet, the front end cover and the rear end cover are respectively provided with a first installation cavity and a second installation cavity, the first installation cavity and the second installation cavity are used for installing two-end structures of a winding, the first oil injection hole is formed in the side wall of the first oil cavity and is aligned with one end of the winding, the rear end cover, the shell and the stator core are jointly formed with a second oil injection hole, the second oil injection hole is formed in the side wall of the second oil cavity and is aligned with the other end of the winding, the first oil cavity and the second oil injection hole are communicated with an oil duct formed in the stator core, the oil inlet is communicated with the first oil cavity, and the oil outlet in the front end cover and the oil outlet in the rear end cover are respectively communicated with the first installation cavity and the second installation cavity.

Furthermore, oil cavity walls are formed on the front end cover and the rear end cover, the free ends of the oil cavity walls are abutted to the stator core, the first oil cavity and the first installation cavity are formed on two sides of the oil cavity wall of the front end cover respectively, the second oil cavity and the second installation cavity are formed on two sides of the oil cavity wall of the rear end cover respectively, the first oil spray hole is formed in the oil cavity wall of the front end cover, and the second oil spray hole is formed in the oil cavity wall of the rear end cover.

Furthermore, the oil cavity wall comprises a first horizontal section, an inclined section and a second horizontal section, the first horizontal section is connected with the shell, one end of the inclined section is connected with the first horizontal section, the other end of the inclined section is connected with the second horizontal section, and the other end of the second horizontal section is connected with the stator core.

Furthermore, the inclined section and the second horizontal section of the oil cavity wall of the front end cover are provided with the first oil injection hole, and the inclined section and the second horizontal section of the oil cavity wall of the rear end cover are provided with the second oil injection hole.

Furthermore, the direction of opening the first oil injection hole and the second oil injection hole is perpendicular to the direction of the end face where the first oil injection hole and the second oil injection hole are located, so that oil can cool the winding from different directions.

Furthermore, a sealing ring is arranged at the joint of the oil cavity wall and the stator core.

Furthermore, the oil ducts comprise a plurality of groups and are arranged at intervals, and each group of oil ducts are arranged along the edge of the stator core and penetrate through two ends of the stator core.

Furthermore, bearing chambers are arranged in the first installation chamber and the second installation chamber and used for installing bearings to assemble the end covers and the rotating shaft.

The application has the advantages that: the oil-cooled motor provided sets up oil cavity and nozzle opening through utilizing motor end cover and casing, retrencies the part kind, reduces the assembly degree of difficulty, can realize cooling winding and stator core simultaneously, improves the heat-sinking capability of motor.

Drawings

FIG. 1 is a schematic structural diagram of an oil-cooled electric machine according to an embodiment of the present application;

FIG. 2 is a schematic view of the structure of FIG. 1 from another view angle;

FIG. 3 isbase:Sub>A sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic view of a portion of the structure of FIG. 1;

FIG. 5 is a schematic structural view of the front end cap of FIG. 1;

FIG. 6 is a structural diagram of the second view angle of FIG. 5;

fig. 7 is a structural diagram of a third view angle of fig. 5.

Labeled in the figure as: 10. the oil-gas separator comprises a shell, 101, an oil inlet, 11, a front end cover, 111, a main body seat, 1111, a mounting hole, 112, an oil cavity wall, 1121, a first oil injection hole, 1122, a first horizontal segment, 1123, an inclined segment, 1124, a second horizontal segment, 1125, a mounting groove, 113, a bearing chamber, 114, a boss, 1141, a threaded hole, 115, a mounting space, 116, a front oil outlet, 12, a rear end cover, 121, a rear oil outlet, 13, a rotating shaft, 14, a rotor core, 15, a stator core, 151, an oil passage, 16, a winding, 17, a first oil cavity, 18 and a sealing ring.

Detailed Description

The invention will be described in further detail below with reference to the figures and specific embodiments.

Referring to fig. 1-7, this embodiment provides an oil-cooled motor, including the casing 10 that has the installation cavity, the both ends of casing 10 set up front end housing 11 and rear end housing 12 respectively, wherein, front end housing 11 and rear end housing 12 have the same structure and all have the installation cavity, still set up pivot 13 in the casing 10, be provided with the rotor on the pivot 13, the rotor outside sets up the stator, the rotor includes the rotor core 14 that the pivot set up is surrounded to the multiunit, the stator includes surrounds the stator core 15 that multiunit set up around rotor core 14, still set up winding 16 on stator core 15, the both ends protrusion stator core setting of winding just sets up in the installation cavity of front end housing and rear end housing respectively.

Specifically, an oil inlet 101 is formed in the housing 10, the front end cover 11 and the rear end cover 12 are respectively provided with a first mounting cavity and a second mounting cavity for mounting two-end structures of the winding, the front end cover is provided with a front oil outlet 116, the rear end cover 12 is provided with a rear oil outlet 121, the front end cover 11 and one end of the housing 10 and one end of the stator core 15 are jointly formed with a first oil cavity 17, a plurality of first oil injection holes 1121 are formed in a side wall of the first oil cavity and aligned with one end of the winding 16, a second oil cavity is formed between the rear end cover and the other end of the housing and the other end of the stator core, a second oil injection hole is formed in a side wall of the second oil cavity and aligned with the other end of the winding, the first oil cavity and the second oil cavity are communicated through an oil duct 151 formed in the stator core, the oil inlet 101 is communicated with the first oil cavity 17, the front oil outlet 102 is communicated with the first mounting cavity, and the rear oil outlet 121 is communicated with the second mounting cavity.

Because the front end cover 11 and the rear end cover 12 have the same structure, here, the front end cover 11 is taken as an example for illustration, the front end cover 11 includes a circular main body seat 111, a mounting hole 1111 for mounting the rotating shaft 13 is formed on the main body seat 111, an oil cavity wall 112 is formed on the front end cover, the oil cavity wall 112 is arranged around the edge of the main body seat 111, a space between the inner side of the oil cavity wall 112 and the main body seat 111 is a first mounting cavity, a mounting space 115 for mounting with the housing is formed between the outer side of the oil cavity wall and the main body seat, the free end of the oil cavity wall 112 abuts against the stator core 15, and the two sides of the oil cavity wall are respectively a first oil cavity 17 and a first mounting cavity.

Preferably, the oil cavity wall 112 includes a first horizontal segment 1122, an inclined segment 1123 and a second horizontal segment 1124, one end of the first horizontal segment 1122 is fixedly connected with the main body seat 10, an end face of the first horizontal segment 1122 is used for abutting against the housing 10, one end of the inclined segment 1123 is connected with the other end of the first horizontal segment 1122, the other end of the inclined segment 1123 is inclined towards the mounting hole and connected with the second horizontal segment 1124, oil spray holes 1121 are respectively formed in the inclined segment 1123 and the second horizontal segment 1124, the direction of the oil spray holes 1121 is perpendicular to the direction of the end face where the oil spray holes are formed, and the first horizontal segment 1122 and the second horizontal segment 1124 are arranged in parallel.

More specifically, the region between the end of the first horizontal segment 1122 and the edge of the main body seat 111 is the mounting space 115, and the mounting space 115 is used for sealing connection with the end wall of the motor housing.

Preferably, the free end of the second horizontal segment 114 is further provided with an annular mounting groove 1125, and a sealing ring 18 is disposed in the mounting groove 1125.

In addition, a bearing chamber 113 is further arranged in the mounting cavity, the bearing chamber 113 is arranged around the edge of the mounting hole 1111, a bearing is arranged in the bearing chamber 113, two ends of the rotating shaft 13 are assembled through the bearing, an oil cavity wall is arranged at the edge of the whole main body seat, as long as the edge of the main body seat 111 leaves a space for assembling with the motor housing, 4 groups of bosses 114 are arranged at the edge of the main body seat at intervals in the circumferential direction, threaded holes 1141 are formed in the bosses 114, and the front end cover is assembled with the housing through bolts.

The working principle is as follows: oil enters the first oil chamber 17 from the oil inlet 101, a part of oil is sprayed out from the first oil spray hole 1121 to cool one end of the winding, a part of oil enters the second oil chamber through the oil duct 151 on the stator core, the other end of the winding is cooled after being sprayed out through the second oil spray hole, the oil cools the stator core simultaneously when passing through the oil duct, and finally the oil is gathered at the bottom of the shell and is recycled after being discharged through the front oil outlet 116 and the rear oil outlet 121.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. An oil-cooled electric machine, comprising:

a housing having a mounting cavity therein;

the stator core is provided with a front end cover, a rear end cover and a stator core, wherein the front end cover and the rear end cover are respectively provided with a first installation cavity and a second installation cavity, the first installation cavity and the second installation cavity are used for installing two-end structures of the winding, a first oil cavity is formed among the front end cover, the casing and the stator core, a first oil injection hole is formed in the side wall of the first oil cavity and aligned with one end of the winding, a second oil cavity is formed among the rear end cover, the casing and the stator core, a second oil injection hole is formed in the side wall of the second oil cavity and aligned with the other end of the winding, the first oil cavity and the second oil cavity are communicated through an oil duct formed in the stator core, the oil inlet is communicated with the first oil cavity, and the oil outlet in the front end cover and the oil outlet in the rear end cover are respectively communicated with the first installation cavity and the second installation cavity.

2. An oil cooled electric machine according to claim 1, characterized in that: the front end cover and the rear end cover are both provided with oil cavity walls, the free ends of the oil cavity walls are abutted to the stator core, the first oil cavity and the first installation cavity are respectively arranged on two sides of the oil cavity wall of the front end cover, the second oil cavity and the second installation cavity are respectively arranged on two sides of the oil cavity wall of the rear end cover, the first oil injection hole is formed in the oil cavity wall of the front end cover, and the second oil injection hole is formed in the oil cavity wall of the rear end cover.

3. An oil-cooled machine according to claim 2, characterized in that: the oil cavity wall comprises a first horizontal section, an inclined section and a second horizontal section, the first horizontal section is connected with the shell, one end of the inclined section is connected with the first horizontal section, the other end of the inclined section is connected with the second horizontal section, and the other end of the second horizontal section is connected to the stator core.

4. An oil cooled electric machine according to claim 3, characterized in that: the inclined section and the second horizontal section of the oil cavity wall of the front end cover are provided with the first oil injection holes, and the inclined section and the second horizontal section of the oil cavity wall of the rear end cover are provided with the second oil injection holes.

5. An oil-cooled machine according to claim 4, characterized in that: the first oil spout hole with the direction of seting up of second oil spout hole all is perpendicular with the terminal surface direction at its place.

6. An oil cooled electric machine according to claim 2, characterized in that: and a sealing ring is arranged at the joint of the oil cavity wall and the stator core.

7. An oil-cooled machine according to claim 3, characterized in that: the oil ducts comprise a plurality of groups and are arranged at intervals, and each group of oil ducts are arranged along the edge of the stator core and penetrate through two ends of the stator core.

8. The oil-cooled electric machine of claim 1, wherein: and bearing chambers are arranged in the first mounting chamber and the second mounting chamber.