CN218276240U

CN218276240U - Oil-cooled motor

Info

Publication number: CN218276240U
Application number: CN202222774335.1U
Authority: CN
Inventors: 贾富淳; 陈静; 李良梓; 揭丁爽; 王晨
Original assignee: ZHEJIANG FOUNDER MOTOR CO Ltd; Lishui Fangde Zhiqu Applied Technology Research Institute Co ltd
Current assignee: ZHEJIANG FOUNDER MOTOR CO Ltd; Lishui Fangde Zhiqu Applied Technology Research Institute Co ltd
Priority date: 2022-10-21
Filing date: 2022-10-21
Publication date: 2023-01-10
Anticipated expiration: 2032-10-21

Abstract

The utility model relates to an oil cooling motor, including casing, front shroud, back shroud, stator, pivot and rotor core, the stator sets up in the casing, and front shroud, back shroud are fixed respectively at the both ends of casing, and rotor core sets up in the pivot, and the both ends of pivot rotate through the bearing respectively and set up on front shroud, back shroud, still are equipped with the axial oil duct that runs through the pivot in the pivot, still are equipped with a plurality of middle part radial oil ducts in the pivot, and a plurality of middle part radial oil ducts communicate with axial oil duct; the rotor core is further provided with a plurality of rotor oil ducts extending from the center of the rotor core to the two ends and the outer side, the rotor oil ducts are communicated with corresponding middle radial oil ducts, and the front cover plate is further provided with a cooling oil inlet B which is communicated with the axial oil ducts. The utility model discloses can wholly cool off rotor core, can carry out indirect cooling to the magnet steel that sets up on rotor core again, promote the cooling effect of rotor greatly, and then can improve the holistic performance of motor.

Description

Oil-cooled motor

Technical Field

The utility model relates to a motor technical field for the electric automobile, more specifically say, relate to an oil-cooled motor.

Background

The new energy automobile has extremely high requirements on the power density (torque density) of the driving motor for the automobile due to the requirements on the whole automobile quality and space; on the other hand, the high speed of the vehicle motor is a certain trend recognized by related manufacturers. The characteristics of large rotating speed range and high power density of the embedded permanent magnet synchronous motor become the preferred type of the vehicle driving motor.

The vehicle driving motor has high requirement on the rotating speed of the motor, and the highest rotating speed can reach ten thousand revolutions per minute. Various losses generated when the motor operates are converted into heat, so that all parts of the motor generate heat, and the temperature is increased. The limit value of the temperature rise directly influences the service life of the motor; and because the harmonic magnetic field of the stator armature and the harmonic magnetic field of the rotor magnetic steel can generate larger eddy current loss to the magnetic steel, the temperature of the magnetic steel is further increased.

Although many heat dissipation technical schemes are designed and manufactured by people in a targeted manner, for example, heat dissipation ribs similar to heat dissipation fins of a heat sink are machined or arranged on a shell, a fan is added, oil injection cooling is performed inside a motor, and the like, the cooling mode can only cool the stator or the rotor, especially the magnetic steel arranged inside a rotor core is difficult to cool, and the magnetic steel is seriously demagnetized, so that the overall performance and the service life of the motor are influenced.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims to provide an oil-cooled motor, this oil-cooled motor can carry out more abundant cooling to the rotor.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

an oil-cooled motor comprises a shell, a front cover plate, a rear cover plate, a stator, a rotating shaft and a rotor iron core, wherein the stator is arranged in the shell, the front cover plate and the rear cover plate are respectively fixed at two ends of the shell, the rotor iron core is arranged on the rotating shaft, two ends of the rotating shaft are respectively arranged on the front cover plate and the rear cover plate through bearings in a rotating manner, an axial oil duct penetrating through the rotating shaft is further arranged on the rotating shaft, a plurality of middle radial oil ducts are further arranged on the rotating shaft, and the middle radial oil ducts are communicated with the axial oil duct; still be equipped with the rotor oil duct that the multichannel extends to both ends and outside by rotor core center on the rotor core, rotor oil duct and corresponding middle part radial oil duct intercommunication, still be equipped with cooling oil entry B on the front shroud, and cooling oil entry B and axial oil duct intercommunication.

As a preferable scheme: the number of the middle radial oil passages is four, and the four middle radial oil passages are arranged in a cross shape.

As a preferable scheme: still be equipped with the oil blanket between the tip of pivot and the front shroud, the one end of pivot still is equipped with the radial oil duct of tip, and the radial oil duct of tip is located between oil blanket and the bearing.

As a preferable scheme: the inner sides of the front cover plate and the rear cover plate are provided with a circle of cambered surface annular grooves, and the outer end of the rotor oil duct faces the cambered surface annular grooves.

As a preferable scheme: still be equipped with coolant oil entry A on the lateral wall of casing, still be equipped with the annular oil duct on the outer wall of stator, coolant oil entry A and annular oil duct intercommunication.

As a preferable scheme: the annular oil duct is a plurality of, and parallel interval sets up, still be equipped with the axial intercommunication oil duct of a plurality of annular oil ducts of intercommunication on the outer wall of stator.

As a preferable scheme: and a cooling oil outlet is also formed in the outer edge of the rear cover plate, which is close to the rear cover plate.

As a preferable scheme: the cooling oil inlet A, the cooling oil inlet B and the cooling oil outlet are communicated through a pipeline, and an oil pump is further arranged on the pipeline at the cooling oil outlet.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up the oil duct that runs through in the pivot to through a plurality of radial oil ducts with each part of cooling oil distribution flow through rotor core, can wholly cool off rotor core, can carry out indirect cooling to the magnet steel that sets up on rotor core again, reasonable oil duct distribution design has promoted the cooling effect of rotor greatly, and then can improve the holistic performance of motor.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

Fig. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic sectional structure of the present invention;

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

fig. 4 is a schematic structural view of the side wall of the stator of the present invention.

The reference signs are: 1. a housing; 11. a cooling oil inlet A; 2. a front cover plate; 21. a cooling oil inlet B; 3. a rear cover plate; 31. a cooling oil outlet; 32. an arc-surface annular groove; 4. a stator; 40. a stator core; 41. an annular groove oil duct; 42. the axial direction is communicated with the oil channel; 43. a winding; 5. a rotating shaft; 51. an end portion radial oil passage; 52. an axial oil passage; 53. a middle radial oil passage; 6. a rotor core; 61. a rotor oil passage; 7. and (7) oil sealing.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, elements, and/or combinations thereof, unless the context clearly indicates otherwise.

Furthermore, in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation of the first and second features not being in direct contact, but being in contact with another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The invention will be further explained with reference to the following embodiments and drawings:

as shown in fig. 1 to 3, the oil-cooled motor includes a housing 1, a front cover plate 2, a rear cover plate 3, a stator 4, a rotating shaft 5 and a rotor core 6, wherein the stator 4 is disposed in the housing 1, the front cover plate 2 and the rear cover plate 3 are respectively fixed at two ends of the housing 1, the rotor core 6 is disposed on the rotating shaft 5, two ends of the rotating shaft 5 are respectively rotatably disposed on the front cover plate 2 and the rear cover plate 3 through bearings, the rotating shaft 5 is further provided with an axial oil passage 52 penetrating through the rotating shaft 5, the rotating shaft 5 is further provided with a plurality of middle radial oil passages 53, and the plurality of middle radial oil passages 53 are communicated with the axial oil passage 52; the number of the middle radial oil passages 53 is four, and the middle radial oil passages are arranged in a cross shape. Still be equipped with multichannel rotor oil duct 61 that extends to both ends and outside by rotor core 6 center on rotor core 6, rotor oil duct 61 communicates with corresponding middle part radial oil duct 53, still be equipped with coolant oil entry B21 on the front shroud 2, and coolant oil entry B21 and axial oil duct 52 intercommunication.

Still be equipped with oil blanket 7 between the tip of pivot 5 and front shroud 2, the one end of pivot 5 still is equipped with tip radial oil duct 51, and tip radial oil duct 51 is located between oil blanket 7 and the bearing. The radial oil passages 51 are arranged to enable cooling oil to flow through the bearings to lubricate the bearings, and the number of the end radial oil passages 51 is four, and the end radial oil passages are arranged in a cross shape.

The end radial oil passage 51, the middle radial oil passage 53 and the rotor oil passage 61 are uniformly and symmetrically arranged, and dynamic balance of the rotor is not affected.

The inner sides of the front cover plate 2 and the rear cover plate 3 are provided with a circle of arc-shaped annular grooves 32, and the outer end of the rotor oil duct 61 faces the arc-shaped annular grooves 32. The cooling oil thrown out from the rotor oil passage 61 can be thrown to the winding end part through the guide of the arc-shaped annular groove 32, and a certain cooling effect can be also played on the winding end part.

As shown in fig. 4, a cooling oil inlet a11 is further formed in the side wall of the housing 1, a ring groove oil passage 41 is further formed in the outer wall of the stator 4, and the cooling oil inlet a11 is communicated with the ring groove oil passage 41. Annular oil duct 41 is a plurality of, and parallel interval sets up, still be equipped with the axial intercommunication oil duct 42 of a plurality of annular oil ducts 41 of intercommunication on the outer wall of stator 4. The oil channel here enables a sufficient cooling of the stator and an indirect cooling of the windings in the stator.

And a cooling oil outlet 31 is also formed in the outer edge of the rear cover plate 3, which is close to the rear cover plate. The cooling oil inlet A11, the cooling oil inlet B21 and the cooling oil outlet 31 are communicated through a pipeline, and an oil pump is further arranged on the pipeline at the cooling oil outlet 31. The cooling oil can be circulated inside and outside the motor under the action of the oil pump, and the heat dissipation capacity of the motor is improved.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. The utility model provides an oil-cooled motor, includes casing (1), front shroud (2), back shroud (3), stator (4), pivot (5) and rotor core (6), stator (4) set up in casing (1), the both ends at casing (1) are fixed respectively in front shroud (2), back shroud (3), rotor core (6) set up on pivot (5), and the both ends of pivot (5) rotate through the bearing respectively and set up on front shroud (2), back shroud (3), its characterized in that: the rotating shaft (5) is further provided with an axial oil duct (52) penetrating through the rotating shaft (5), the rotating shaft (5) is further provided with a plurality of middle radial oil ducts (53), and the middle radial oil ducts (53) are communicated with the axial oil duct (52); still be equipped with multichannel on rotor core (6) by rotor core (6) center to both ends and rotor oil duct (61) that the outside extends, rotor oil duct (61) and corresponding radial oil duct (53) in middle part intercommunication, still be equipped with coolant oil entry B (21) on front shroud (2), and coolant oil entry B (21) and axial oil duct (52) intercommunication.

2. The oil-cooled electric machine of claim 1, wherein: the number of the middle radial oil passages (53) is four, and the middle radial oil passages are arranged in a cross shape.

3. An oil cooled electric machine according to claim 1, characterized in that: still be equipped with oil blanket (7) between the tip of pivot (5) and front shroud (2), the one end of pivot (5) still is equipped with tip radial oil duct (51), and tip radial oil duct (51) are located between oil blanket (7) and the bearing.

4. The oil-cooled electric machine of claim 1, wherein: the inner sides of the front cover plate (2) and the rear cover plate (3) are provided with a circle of cambered surface annular groove (32), and the outer end of the rotor oil duct (61) faces the cambered surface annular groove (32).

5. An oil cooled electric machine according to claim 1, characterized in that: still be equipped with coolant oil entry A (11) on the lateral wall of casing (1), still be equipped with annular oil duct (41) on the outer wall of stator (4), coolant oil entry A (11) and annular oil duct (41) intercommunication.

6. An oil cooled electric machine according to claim 5, wherein: annular oil duct (41) are a plurality of, and parallel interval sets up, still be equipped with axial intercommunication oil duct (42) of a plurality of annular oil ducts of intercommunication (41) on the outer wall of stator (4).

7. An oil cooled electric machine according to claim 5, wherein: and a cooling oil outlet (31) is also formed in the outer edge of the rear cover plate (3) close to the rear cover plate.

8. An oil cooled electric machine according to claim 7, wherein: the cooling oil inlet A (11), the cooling oil inlet B (21) and the cooling oil outlet (31) are communicated through pipelines, and an oil pump is further arranged on the pipeline at the cooling oil outlet (31).