CN219124082U - Permanent magnet motor convenient for oil cooling - Google Patents

Abstract

The utility model relates to a permanent magnet motor convenient for oil cooling, which comprises a shell, a rotor and a stator, wherein the stator is fixed on the inner wall of the shell, the rotor comprises a rotor core and a rotating shaft, two ends of the rotating shaft are rotatably connected with the shell, a cooling oil pipe is arranged on the side wall of the shell, one end of the cooling oil pipe is positioned at the upper part of the rotor core, magnetic steel is further inserted on the rotor core, an oil hole is further formed in one side of the magnetic steel, and the oil hole penetrates through the whole rotor core. The special magnetic steel groove shape with the magnetic steel capable of being cooled by oil is designed on the rotor core, auxiliary through holes are mainly formed in the edges of the magnetic steel groove, corresponding through holes are also formed in the pressing plate, and the magnetic steel can be directly cooled by combining a cooling oil pipe embedded in the shell, so that the temperature of the rotor is reduced; and the demagnetizing risk is reduced, and the magnetic steel cost is reduced.

Description

Permanent magnet motor convenient for oil cooling

Technical Field

The utility model relates to the technical field of new energy automobile motors, in particular to a permanent magnet motor convenient for oil cooling.

Background

The new energy driving motor tends to have the trend of high torque power output, high rotating speed and compact structure at present, and under the working condition of high-speed operation of the motor, the electromagnetic performance and the service life of the motor can be seriously influenced by the rising of internal heat. The problem of heat dissipation of the new energy driving motor is always a problem which needs to be overcome by the technicians in the field.

Although many heat dissipation technical schemes are designed and manufactured in a targeted manner, such as machining or installing heat dissipation ribs similar to heat dissipation fins of a heat radiator on a shell, adding a fan, performing oil spraying cooling in a motor, and the like, the cooling mode only can cool a part of a stator or a rotor, and particularly, magnetic steel in the rotor core is difficult to cool, so that the magnetic steel is seriously demagnetized, and the overall performance and the service life of the motor are affected.

Disclosure of Invention

In order to solve the technical problems, the utility model aims to provide a permanent magnet motor convenient for oil cooling, which has a simple cooling structure and can better cool the inside of a rotor core and magnetic steel.

In order to achieve the above object, the present utility model adopts the following technical scheme:

the utility model provides a make things convenient for oily cold permanent magnet machine, includes casing, rotor and stator, the stator is fixed at shells inner wall, the rotor includes rotor core and pivot, and the pivot both ends are rotated with the casing and are connected, the casing lateral wall is equipped with cooling oil pipe, and cooling oil pipe's one end is located rotor core upper portion, still insert on the rotor core and be equipped with the magnet steel, magnet steel one side still is equipped with the oilhole, the oilhole runs through whole rotor core.

As a preferable scheme: the rotor core comprises a rotor punching sheet in the middle and pressing plates at two ends, wherein through holes are formed in the pressing plates and are communicated with the oil holes.

As a preferable scheme: the magnetic steel on the rotor core is distributed in a double-V shape, an inner oil hole A is formed in the inner side of the inner magnetic steel, the through hole on the pressing plate comprises strip-shaped holes, and each strip-shaped hole is correspondingly communicated with two inner oil holes A.

As a preferable scheme: the plurality of strip-shaped holes on the pressing plate are arranged around the axis at equal intervals.

As a preferable scheme: the inner side of the outer magnetic steel on the rotor core is provided with an inner oil hole B, the through hole on the pressing plate comprises round holes, and each round hole is correspondingly communicated with one inner oil hole B.

As a preferable scheme: the stator comprises a stator core and windings inserted in the stator core, one end of the cooling oil pipe is arc-shaped, and the cooling oil pipe is arranged at the upper end of the rotor core after passing over the windings.

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

the special magnetic steel groove shape with the magnetic steel capable of being cooled by oil is designed on the rotor core, auxiliary through holes are mainly formed in the edges of the magnetic steel groove, corresponding through holes are also formed in the pressing plate, and the magnetic steel can be directly cooled by combining a cooling oil pipe embedded in the shell, so that the temperature of the rotor is reduced; and the demagnetizing risk is reduced, and the magnetic steel cost is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and 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 do not limit the application.

FIG. 1 is a schematic view of the overall structure of the present utility model (the spindle is not shown);

FIG. 2 is a schematic cross-sectional view of the present utility model (the shaft is not shown);

fig. 3 is a schematic diagram of an end face structure of a rotor core of the present utility model;

fig. 4 is a schematic end-face structure of a rotor sheet according to the present utility model.

The reference numerals are: 1. a housing; 2. a winding; 3. rotor punching; 4. a cooling oil pipe; 5. a stator core; 6. a pressing plate; 61. a bar-shaped hole; 62. a round hole; 7. magnetic steel; 71. an inner oil hole A; 72. and an inner oil hole B.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present application. 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 in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

Furthermore, in the description of the present utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," "counterclockwise," 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 constructed 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. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more, unless otherwise clearly defined.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

the utility model provides a make things convenient for oily cold permanent-magnet machine as shown in fig. 1 and fig. 2, includes casing 1, rotor and stator, the stator is fixed at shells inner wall, the rotor includes rotor core and pivot, and the pivot both ends are rotated with casing 1 and are connected, the stator includes stator core 5 and inserts the winding 2 of establishing in stator core 5, 1 lateral wall of casing is equipped with cooling oil pipe 4, cooling oil pipe 4 one end becomes the arc, and cooling oil pipe 4 passes behind winding 2 and set up in rotor core upper end, still insert on the rotor core and be equipped with magnet steel 7, magnet steel one side still is equipped with the oilhole, the oilhole runs through whole rotor core.

As shown in fig. 3 and 4, the rotor core includes a rotor punching sheet 3 in the middle and pressing plates 6 at two ends, and through holes are formed in the pressing plates 6 and are communicated with the oil holes. The magnetic steel 7 on the rotor core is distributed in a double-V shape, the inner side of the inner magnetic steel 7 is provided with an inner oil hole A71, the through hole on the pressing plate 6 comprises strip holes 61, and each strip hole 61 is correspondingly communicated with two inner oil holes A71. The plurality of strip-shaped holes 61 on the pressing plate 6 are equidistantly arranged around the axis. The inner side of the outer magnetic steel 7 on the rotor core is provided with an inner oil hole B72, the through hole on the pressing plate 6 comprises round holes 62, and each round hole 62 is correspondingly communicated with one inner oil hole B72.

The other end of the cooling oil pipe extends out of the shell and then is connected with the oil pump, cooling oil is continuously sprayed on the end face of one end of the rotor core under the action of the oil pump, the cooling oil can penetrate through the rotor core along the through hole of the end face and the oil hole beside the magnetic steel on the rotor punching sheet, the other end of the rotor core is in a runner, the whole process not only cools the rotor core, but also can cool the magnetic steel on the rotor core, the cooling efficiency is greatly increased, and the performance of the motor is improved.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. 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 embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model, and any simple modification, equivalent variation and modification of the above embodiments in light of the technical principles of the utility model may be made within the scope of the present utility model.

Claims (6)

1. The utility model provides a make things convenient for oily cold permanent-magnet machine, includes casing (1), rotor and stator, the stator is fixed at shells inner wall, the rotor includes rotor core and pivot, and pivot both ends are connected its characterized in that with casing (1) rotation: the side wall of the shell (1) is provided with a cooling oil pipe (4), one end of the cooling oil pipe (4) is located on the upper portion of the rotor core, magnetic steel (7) is further inserted on the rotor core, one side of the magnetic steel is further provided with an oil hole, and the oil hole penetrates through the whole rotor core.

2. The permanent magnet machine of claim 1 wherein the permanent magnet machine is configured to facilitate oil cooling: the rotor core comprises a rotor punching sheet (3) in the middle and pressing plates (6) at two ends, wherein through holes are formed in the pressing plates (6), and the through holes are communicated with the oil holes.

3. The permanent magnet machine for facilitating oil cooling of claim 2, wherein: the magnetic steel (7) on the rotor core is distributed in a double-V shape, an inner oil hole A (71) is formed in the inner side of the inner layer magnetic steel (7), the through hole on the pressing plate (6) comprises strip-shaped holes (61), and each strip-shaped hole (61) is correspondingly communicated with two inner oil holes A (71).

4. A permanent magnet machine according to claim 3 for facilitating oil cooling, wherein: a plurality of strip-shaped holes (61) on the pressing plate (6) are equidistantly arranged around the axis at intervals.

5. A permanent magnet machine according to claim 3 for facilitating oil cooling, wherein: the inner side of the outer layer magnetic steel (7) on the rotor core is provided with an inner oil hole B (72), the through hole on the pressing plate (6) comprises round holes (62), and each round hole (62) is correspondingly communicated with one inner oil hole B (72).

6. The permanent magnet machine of claim 1 wherein the permanent magnet machine is configured to facilitate oil cooling: the stator comprises a stator core (5) and a winding (2) inserted into the stator core (5), one end of the cooling oil pipe (4) is arc-shaped, and the cooling oil pipe (4) is arranged at the upper end of the rotor core after passing over the winding (2).

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