CN221552921U - Oil-cooled motor - Google Patents
Oil-cooled motor Download PDFInfo
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- CN221552921U CN221552921U CN202323268123.7U CN202323268123U CN221552921U CN 221552921 U CN221552921 U CN 221552921U CN 202323268123 U CN202323268123 U CN 202323268123U CN 221552921 U CN221552921 U CN 221552921U
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Abstract
本实用新型公开的一种油冷电机，包括：前端盖、后端盖、定子和转子；定子的两端分别与前端盖和后端盖可拆卸连接，转子穿过定子的内侧，转子的两端分别与前端盖和后端盖转动连接；前端盖上设有进油口和出油口，前端盖、定子和后端盖之间设有相互连通的液冷油道；当进油口输入冷却油时，一部分冷却油经前端盖的液冷油道流至定子的液冷油道，对定子铁芯进行冷却，后经后端盖的液冷油道流至转子一侧的绕组端部，对绕组进行冷却，另一部分冷却油经前端盖的液冷油道流至转子另一侧的绕组端部，对绕组进行冷却；冷却油经出油口排出。本实用新型具有结构紧凑、拆装便捷、冷却效果显著且成本低廉等优点，解决了现有电机的油冷结构复杂且成本较高的问题。
The utility model discloses an oil-cooled motor, comprising: a front cover, a rear cover, a stator and a rotor; the two ends of the stator are detachably connected to the front cover and the rear cover respectively, the rotor passes through the inner side of the stator, and the two ends of the rotor are rotatably connected to the front cover and the rear cover respectively; the front cover is provided with an oil inlet and an oil outlet, and the front cover, the stator and the rear cover are provided with mutually connected liquid cooling oil channels; when cooling oil is input into the oil inlet, a part of the cooling oil flows to the liquid cooling oil channel of the stator through the liquid cooling oil channel of the front cover to cool the stator core, and then flows to the winding end on one side of the rotor through the liquid cooling oil channel of the rear cover to cool the winding, and the other part of the cooling oil flows to the winding end on the other side of the rotor through the liquid cooling oil channel of the front cover to cool the winding; the cooling oil is discharged through the oil outlet. The utility model has the advantages of compact structure, convenient disassembly and assembly, significant cooling effect and low cost, and solves the problem that the oil cooling structure of the existing motor is complicated and the cost is high.
Description
Technical Field
The utility model belongs to the technical field of motors, and particularly relates to a novel oil-cooled motor.
Background
The motor can produce a large amount of heat in the operation process, so that the temperature of a stator and a rotor of the motor is increased, the power and the efficiency of the motor are further affected, and the damage such as burning loss, bearing damage and demagnetization of a permanent magnet can be caused by the overhigh temperature. At present, the motor cooling mode adopts air cooling, water cooling and oil cooling modes, and the heat dissipation efficiency of the oil cooling is highest.
The oil path structure of the motor can be divided into two parts, namely a rotor oil path and a stator oil path. At present, the main schemes of the stator oil way of the oil-cooled motor are as follows:
One is to pass oil from the stator core, cool the stator from the oil injection ring at the end, the stator core is assembled with the casing in an interference way. This scheme can be comparatively even to stator cooling, can not exist local overheated, but need install the oil spout ring.
The other is sprayed from the oil pipe to the stator core and the end part of the stator, and the stator core is fixed on the shell by a pull rod. The scheme has the advantages that the cooling structure is simple, only the oil pipe is required to be installed, the cost is lower, the cooling effect is not as good as that of the former scheme, uneven cooling is easy to occur, and the local overheating condition is easy to occur.
Therefore, the existing two oil cooling structures are complex and high in cost, and there is room for improvement.
Disclosure of utility model
Aiming at the problems of complex oil cooling structure and higher cost of the motor in the prior art, the utility model provides the oil cooling motor which has the advantages of compact structure, convenient disassembly and assembly, obvious cooling effect and low cost.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
An oil-cooled motor comprising: the front end cover, the rear end cover, the stator and the rotor; the two ends of the stator are detachably connected with the front end cover and the rear end cover respectively, the rotor penetrates through the inner side of the stator, and the two ends of the rotor are rotatably connected with the front end cover and the rear end cover respectively; an oil inlet and an oil outlet are formed in the front end cover, and liquid cooling oil channels which are communicated with each other are formed in the inner side of the front end cover, the side part of the stator and the inner side of the rear end cover; when cooling oil is input into the oil inlet, part of the cooling oil flows to the liquid cooling oil duct at the side part of the stator through the liquid cooling oil duct at the inner side of the front end cover to cool the stator core, and then flows to the winding end part at one side of the rotor through the liquid cooling oil duct at the inner side of the rear end cover to cool the winding, and the other part of the cooling oil flows to the winding end part at the other side of the rotor through the liquid cooling oil duct at the inner side of the front end cover to cool the winding; the cooling oil is discharged from the oil cooling motor through the oil outlet.
As a further improvement of the utility model, the inner side of the front end cover is provided with an annular oil duct, the side part of the annular oil duct is respectively communicated with an oil inlet and an oil outlet, and a plurality of oil holes are uniformly distributed on the side wall of the annular oil duct; when cooling oil is input into the oil inlet, one part of the cooling oil is supplied to the stator through the annular oil duct, and the other part of the cooling oil is sprayed to the winding end part on one side of the rotor through the oil hole.
As a further improvement of the utility model, the inner side of the rear end cover is provided with an annular oil duct and a first oil return port, a plurality of oil holes are uniformly distributed on the side wall of the annular oil duct, the side part of the annular oil duct is communicated with the first oil return port, and the first oil return port is communicated with a liquid cooling oil duct of the stator; when cooling oil flows to the annular oil duct on the inner side of the rear end cover through the stator, one part of the cooling oil is sprayed to the winding end part on the other side of the rotor through the oil hole, and the other part of the cooling oil flows back to the side part of the stator through the first oil return port.
As a further improvement of the utility model, the side part of the stator is provided with a through oil cavity and a second oil return port, a plurality of oil cavities are uniformly distributed on the side part of the stator, two ends of the oil cavity are respectively communicated with the annular oil duct on the inner side of the front end cover and the annular oil duct on the inner side of the rear end cover, and two ends of the second oil return port are respectively communicated with the first oil return port and the oil outlet.
As a further improvement of the utility model, the side part of the front end cover, the side part of the rear end cover and the side part of the stator are respectively provided with a plurality of screw holes, and the front end cover, the rear end cover and the stator are detachably connected by arranging long screws in the screw holes.
As a further improvement of the utility model, the stator core of the stator is formed by bonding a plurality of sections of stator punching sheets; and the contact surfaces of the stator, the front end cover and the rear end cover are provided with sealant.
As a further improvement of the utility model, the stator core of the stator is obtained by laminating silicon steel sheets, and the outer surface of the stator core is sprayed with waterproof and oil-proof paint.
As a further improvement of the present utility model, the stator core of the stator is obtained by welding.
As a further improvement of the utility model, the motor stator further comprises a plastic casing, wherein the plastic casing is arranged outside the stator, and two ends of the plastic casing are respectively contacted with the front end cover and the rear end cover.
As a further improvement of the utility model, the contact surfaces of the plastic casing and the front end cover and the rear end cover are respectively provided with a sealing ring.
Compared with the prior art, the utility model has the advantages that:
According to the oil-cooled motor, the two ends of the stator are detachably connected with the front end cover and the rear end cover respectively, the rotor penetrates through the inner side of the stator, the two ends of the rotor are rotatably connected with the front end cover and the rear end cover respectively, and the inner side of the front end cover, the side part of the stator and the inner side of the rear end cover are provided with the liquid cooling oil channels which are mutually communicated, so that the oil-cooled motor with compact structure and convenient assembly and disassembly is obtained, components such as a motor shell, an oil injection ring and an oil pipe are omitted, the assembly complexity is greatly simplified, and the motor cost is reduced; after the motor shell is eliminated, the weight and the volume of the motor are greatly reduced, the heat dissipation efficiency of the motor is improved, and the power density of the motor is improved; when cooling oil is input into the oil inlet, part of the cooling oil flows to the liquid cooling oil duct at the side part of the stator through the liquid cooling oil duct at the inner side of the front end cover to cool the stator core, and then flows to the winding end part at one side of the rotor through the liquid cooling oil duct at the inner side of the rear end cover to cool the winding, and the other part of the cooling oil flows to the winding end part at the other side of the rotor through the liquid cooling oil duct at the inner side of the front end cover to cool the winding; the cooling oil is finally discharged out of the oil-cooled motor through the oil outlet; the stator core and the winding end are uniformly and effectively cooled, local overheating is avoided, and the cooling efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of an oil-cooled motor in embodiment 1 of the present utility model;
Fig. 2 is a schematic diagram of a schematic cross-sectional structure of an oil-cooled motor in embodiment 1 of the present utility model; arrows in the figure indicate the flow direction of the cooling oil;
FIG. 3 is a schematic structural diagram of a front end cover in embodiment 1 of the present utility model;
FIG. 4 is a schematic cross-sectional schematic view of the front end cover in embodiment 1 of the present utility model;
FIG. 5 is a schematic view of the structure of the rear end cap in embodiment 1 of the present utility model;
FIG. 6 is a schematic diagram of the principle of the cross-sectional structure of the rear end cap in embodiment 1 of the present utility model;
Fig. 7 is a schematic structural diagram of a stator in embodiment 1 of the present utility model;
fig. 8 is a schematic diagram showing the principle of the sectional structure of a stator in embodiment 1 of the present utility model;
fig. 9 is a schematic structural diagram of an oil-cooled motor in embodiment 2 of the present utility model;
fig. 10 is a schematic diagram showing the principle of the sectional structure of an oil-cooled motor in embodiment 2 of the present utility model;
FIG. 11 is a schematic diagram of the structure of FIG. 10 at A;
Legend description: 1. a front end cover; 2. a rear end cover; 3. a stator; 31. a stator core; 4. a long screw; 5. a rotor; 6. an oil inlet; 7. an oil outlet; 8. an annular oil passage; 9. an oil hole; 10. a first oil return port; 11. an oil chamber; 12. a second oil return port; 13. a screw hole; 14. a plastic housing; 15. and (3) sealing rings.
Detailed Description
The utility model is further described below in connection with the drawings and the specific preferred embodiments, but the scope of protection of the utility model is not limited thereby.
In the description of the present utility model, it should be understood that the terms "side," "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the utility model.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like, may explicitly or implicitly include one or more such features, and in the description of the present utility model, a "plurality" means two or more, unless otherwise specifically limited.
Example 1
As shown in fig. 1 to 8, the oil-cooled motor of the present utility model includes: front end cap 1, rear end cap 2, stator 3 and rotor 5. The two ends of the stator 3 are respectively detachably connected with the front end cover 1 and the rear end cover 2, the rotor 5 penetrates through the inner side of the stator 3, and the two ends of the rotor 5 are respectively rotatably connected with the front end cover 1 and the rear end cover 2; the front end cover 1 is provided with an oil inlet 6 and an oil outlet 7, and the inner side of the front end cover 1, the side part of the stator 3 and the inner side of the rear end cover 2 are provided with liquid cooling oil channels which are mutually communicated. As shown in fig. 2, when the cooling oil is inputted into the oil inlet 6, a part of the cooling oil flows to the liquid cooling oil duct at the side of the stator 3 through the liquid cooling oil duct at the inner side of the front end cover 1 to cool the stator core, and then flows to the winding end part at one side of the rotor 5 through the liquid cooling oil duct at the inner side of the rear end cover 2 to cool the winding, and another part of the cooling oil flows to the winding end part at the other side of the rotor 5 through the liquid cooling oil duct at the inner side of the front end cover 1 to cool the winding; the cooling oil is discharged out of the oil cooling motor through the oil outlet 7. It will be appreciated that the front end cap 1 may also be replaced by a reducer half-shell.
In the embodiment, through detachably connecting the two ends of the stator 3 with the front end cover 1 and the rear end cover 2 respectively, the rotor 5 passes through the inner side of the stator 3, the two ends of the rotor 5 are respectively and rotatably connected with the front end cover 1 and the rear end cover 2, and through arranging the oil inlet 6 and the oil outlet 7 on the front end cover 1 and arranging the liquid cooling oil ducts which are mutually communicated with each other on the inner side of the front end cover 1, the side part of the stator 3 and the inner side of the rear end cover 2, the oil cooling motor with compact structure and convenient assembly and disassembly is obtained, the components such as a motor shell, an oil injection ring, an oil pipe and the like are omitted, the assembly complexity is greatly simplified, and the motor cost is reduced; after the motor shell is canceled, the weight and the volume of the motor are greatly reduced, the heat dissipation efficiency of the motor is improved, and the power density of the motor is improved. When cooling oil is input into the oil inlet 6, a part of the cooling oil flows to the liquid cooling oil duct at the side part of the stator 3 through the liquid cooling oil duct at the inner side of the front end cover 1 to cool the stator core 31, and then flows to the winding end part at one side of the rotor 5 through the liquid cooling oil duct at the inner side of the rear end cover 2 to cool the winding, and the other part of the cooling oil flows to the winding end part at the other side of the rotor 5 through the liquid cooling oil duct at the inner side of the front end cover 1 to cool the winding; the cooling oil is finally discharged out of the oil-cooled motor through the oil outlet 7; the stator core and the winding end are uniformly and effectively cooled, local overheating is avoided, and the cooling efficiency is improved.
As shown in fig. 3 and 4, in this embodiment, an annular oil duct 8 is provided inside the front end cover 1, the side of the annular oil duct 8 is respectively communicated with the oil inlet 6 and the oil outlet 7, and a plurality of oil holes 9 are uniformly distributed on the side wall of the annular oil duct 8. When cooling oil is input into the oil inlet 6, one part of the cooling oil is supplied to the stator 3 through the annular oil duct 8, and the other part of the cooling oil is sprayed to the winding end part on one side of the rotor 5 through the oil hole 9.
As shown in fig. 5 and 6, in this embodiment, an annular oil duct 8 and a first oil return port 10 are disposed inside the rear end cover 2, a plurality of oil holes 9 are uniformly distributed on the side wall of the annular oil duct 8, and the side portion of the annular oil duct 8 is communicated with the first oil return port 10, and the first oil return port 10 is communicated with the liquid cooling oil duct of the stator 3. When the cooling oil flows to the annular oil duct 8 on the inner side of the rear end cover 2 through the stator 3, one part of the cooling oil is sprayed to the winding end on the other side of the rotor 5 through the oil hole 9, and the other part of the cooling oil flows back to the side part of the stator 3 through the first oil return port 10.
As shown in fig. 7 and 8, in the present embodiment, the side portion of the stator 3 is provided with a through oil chamber 11 and a second oil return port 12. The plurality of oil cavities 11 are uniformly distributed on the side part of the stator 3, the oil cavities 11 are mutually communicated, an annular oil duct is formed on the side part of the stator 3, two ends of the oil cavity 11 are respectively communicated with the annular oil duct 8 on the inner side of the front end cover 1 and the annular oil duct 8 on the inner side of the rear end cover 2, and two ends of the second oil return port 12 are respectively communicated with the first oil return port 10 and the oil outlet 7.
In this embodiment, the side portion of the front end cover 1, the side portion of the rear end cover 2 and the side portion of the stator 3 are provided with a plurality of screw holes 13, and the long screw 4 is installed in the screw holes 13, so that the front end cover 1, the rear end cover 2 and the stator 3 can be detachably connected, which is simple and reliable.
Further, the stator core 31 of the stator 3 is formed by bonding a plurality of sections of stator punching sheets, so that core gaps are eliminated, and cooling oil is prevented from seeping out from the core; the contact surfaces of the stator 3, the front end cover 1 and the rear end cover 2 are provided with sealant to improve the sealing effect.
In other embodiments, the stator core 31 of the stator 3 is also obtained by lamination of silicon steel sheets, and the outer surface of the stator core 31 is sprayed with a water-and oil-repellent paint to prevent the cooling oil from penetrating out of the stator core 31.
As shown in fig. 2, the cooling oil enters the front end cover 1 or the oil inlet 6 on the half shell of the speed reducer from the speed reducer or the oil pump and flows into the annular oil duct 8, the cooling oil is sprayed to one winding end part of the stator 5 by utilizing the oil hole 9 on the annular oil duct 8, and the bottom of the annular oil duct 8 is provided with a communicated oil return port 7. The stator 3 is provided with a penetrating oil cavity 11, one end of the oil cavity 11 is communicated with the annular oil duct 8 on the front end cover 1 or the reducer half shell, so that cooling oil can enter the stator core 31 from the front end cover 1 or the reducer half shell, heat of the stator core 31 is taken away, and a second oil return port 12 is formed in the lower portion of the stator core 31. The rear end cover 2 is also provided with an annular oil duct 8 and a plurality of oil holes 9 and a first oil return opening. The annular oil duct 8 of the rear end cover 2 is connected with the other end of the oil cavity 11, and cooling oil enters the annular oil duct 8 of the rear end cover 2 from the stator core 31 and then sprays and cools the other winding end of the stator through the oil hole 9. The oil in the motor returns to the reducer or the oil pump from the motor through the front end cover 1 or the reducer half shell, the stator 3 and the first oil return port 10 on the rear end cover 2, and a new cycle is performed.
Example 2
As shown in fig. 9 to 11, the oil-cooled motor of the present embodiment has a similar structural arrangement and operation principle to the oil-cooled motor of embodiment 1, and differs mainly in that the stator core 31 of the stator 3 is obtained by welding or self-fastening.
As shown in fig. 9 and 10, in this embodiment, the stator further includes a plastic housing 14, the plastic housing 14 is disposed outside the stator 3, and both ends of the plastic housing 14 are respectively in contact with the front end cover 1 and the rear end cover 2.
As shown in fig. 11, in this embodiment, a sealing ring 15 is provided at the contact surface between the plastic housing 14 and the rear cover 2. The contact surface of the plastic housing 14 and the front end cap 1 is also provided with a sealing ring 15.
In this embodiment, the stator core 31 is prepared by adopting a welding or self-fastening scheme with lower cost, in order to solve the problem that the cooling oil seeps out from the stator core 31, a plastic casing 14 is added on the periphery of the stator core 31, and the casing, the front end cover 1 (or the half-shell of the speed reducer) and the rear end cover 2 are sealed by adopting sealing rings 15, so that the cooling oil is prevented from penetrating to the outside of the motor, and meanwhile, the casing can also prevent the stator core 31 from being corroded by the environment, thereby being beneficial to prolonging the service life of the stator 3.
While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model or equivalent embodiments using the method and technical solution disclosed above without departing from the spirit and technical solution of the present utility model. Therefore, any simple modification, equivalent substitution, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model, which do not depart from the technical solution of the present utility model, still fall within the scope of the technical solution of the present utility model.
Claims (10)
1. An oil-cooled motor, comprising: a front end cover (1), a rear end cover (2), a stator (3) and a rotor (5); the two ends of the stator (3) are respectively detachably connected with the front end cover (1) and the rear end cover (2), the rotor (5) penetrates through the inner side of the stator (3), and the two ends of the rotor (5) are respectively rotationally connected with the front end cover (1) and the rear end cover (2); an oil inlet (6) and an oil outlet (7) are formed in the front end cover (1), and liquid cooling oil channels which are communicated with each other are formed in the inner side of the front end cover (1), the side part of the stator (3) and the inner side of the rear end cover (2); when cooling oil is input into the oil inlet (6), part of the cooling oil flows to a liquid cooling oil duct at the side part of the stator (3) through a liquid cooling oil duct at the inner side of the front end cover (1), cools the stator core (31), then flows to a winding end part at one side of the rotor (5) through a liquid cooling oil duct at the inner side of the rear end cover (2), cools the winding, and the other part of the cooling oil flows to the winding end part at the other side of the rotor (5) through a liquid cooling oil duct at the inner side of the front end cover (1), and cools the winding; and the cooling oil is discharged out of the oil-cooled motor through the oil outlet (7).
2. The oil-cooled motor according to claim 1, wherein an annular oil duct (8) is arranged on the inner side of the front end cover (1), the side parts of the annular oil duct (8) are respectively communicated with the oil inlet (6) and the oil outlet (7), and a plurality of oil holes (9) are uniformly distributed on the side wall of the annular oil duct (8); when cooling oil is input into the oil inlet (6), one part of the cooling oil is supplied to the stator (3) through the annular oil duct (8), and the other part of the cooling oil is sprayed to the winding end part on one side of the rotor (5) through the oil hole (9).
3. The oil-cooled motor according to claim 2, wherein an annular oil duct (8) and a first oil return port (10) are arranged on the inner side of the rear end cover (2), a plurality of oil holes (9) are uniformly distributed on the side wall of the annular oil duct (8), the side part of the annular oil duct (8) is communicated with the first oil return port (10), and the first oil return port (10) is communicated with a liquid cooling oil duct of the stator (3); when cooling oil flows to the annular oil duct (8) on the inner side of the rear end cover (2) through the stator (3), one part of cooling oil is sprayed to the winding end part on the other side of the rotor (5) through the oil hole (9), and the other part of cooling oil flows back to the side part of the stator (3) through the first oil return port (10).
4. An oil-cooled motor according to claim 3, characterized in that the side part of the stator (3) is provided with a through oil cavity (11) and a second oil return port (12), a plurality of oil cavities (11) are uniformly distributed on the side part of the stator (3), two ends of the oil cavity (11) are respectively communicated with an annular oil duct (8) on the inner side of the front end cover (1) and an annular oil duct (8) on the inner side of the rear end cover (2), and two ends of the second oil return port (12) are respectively communicated with the first oil return port (10) and the oil outlet (7).
5. An oil-cooled motor according to any one of claims 1 to 4, characterized in that the side of the front end cover (1), the side of the rear end cover (2) and the side of the stator (3) are provided with a plurality of screw holes (13), and the front end cover (1), the rear end cover (2) and the stator (3) are detachably connected by inserting a long screw (4) into the screw holes (13).
6. An oil-cooled electric machine according to claim 5, characterized in that the stator core (31) of the stator (3) consists of a plurality of stator laminations bonded; and the contact surface of the stator (3) with the front end cover (1) and the rear end cover (2) is provided with sealant.
7. The oil-cooled motor according to claim 5, characterized in that the stator core (31) of the stator (3) is obtained by lamination of silicon steel sheets, and the outer surface of the stator core (31) is sprayed with a water-and oil-repellent coating.
8. An oil-cooled electric machine according to claim 5, characterized in that the stator core (31) of the stator (3) is obtained by welding.
9. An oil cooled electric machine according to claim 8, further comprising a plastic housing (14), said plastic housing (14) being arranged outside the stator (3), both ends of said plastic housing (14) being in contact with the front end cover (1) and the rear end cover (2), respectively.
10. An oil cooled electric machine according to claim 9, characterized in that the plastic casing (14) is provided with sealing rings (15) at the contact surfaces with the front end cover (1) and the rear end cover (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323268123.7U CN221552921U (en) | 2023-11-30 | 2023-11-30 | Oil-cooled motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323268123.7U CN221552921U (en) | 2023-11-30 | 2023-11-30 | Oil-cooled motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221552921U true CN221552921U (en) | 2024-08-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323268123.7U Active CN221552921U (en) | 2023-11-30 | 2023-11-30 | Oil-cooled motor |
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| Country | Link |
|---|---|
| CN (1) | CN221552921U (en) |
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2023
- 2023-11-30 CN CN202323268123.7U patent/CN221552921U/en active Active
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