CN218678576U - Motor stator and radial oil cooling permanent magnet motor - Google Patents

Abstract

The utility model discloses a motor stator and radial oil cooling permanent-magnet machine, motor stator include the cylindrical stator core of cavity, be equipped with a plurality of oil feed passageways and a plurality of oil outlet channel along radial extension on the stator core, a plurality of oil feed passageways are arranged stator core's radial one side, a plurality of oil outlet channel are arranged stator core's radial opposite side, a plurality of oil feed passageways, a plurality of oil outlet channel all follow stator core axial interval arrangement. The utility model provides a motor stator and radial oil cooling permanent-magnet machine can improve cooling efficiency, is applicable to high-speed permanent-magnet machine's cooling.

Description

Motor stator and radial oil cooling permanent magnet motor

Technical Field

The utility model relates to the technical field of electric machines, in particular to motor stator and radial oil cooling permanent-magnet machine.

Background

The high-speed permanent magnet motor has the greatest characteristic of high power density, so that the heating of the motor under the same volume is far higher than that of a common motor, the permanent magnet is easy to demagnetize and lose efficacy due to serious heating, and a reasonable motor cooling mode is of great importance. The heating sources of the high-speed permanent magnet motor are a stator core (accounting for about 60%), a stator winding (accounting for about 30%) and the rest accounting for 10%.

There are currently three main cooling modes:

the first one is air cooling, the motor is open, and the air is directly blown into the motor, so that the defect that the protection grade is low and the motor can only be used in a specific field is overcome;

the second is water cooling, water is introduced into the motor stator casing to cool the motor, and the disadvantage is that the cooling is not uniform, especially the rotor part which is easy to demagnetize cannot be directly cooled;

the third is stator and rotor double-loop axial oil cooling, and axial cooling oil paths are respectively arranged in the stator and the rotor to cool the motor, so that the rotor oil path weakens the strength of the rotor, and the motor cannot be applied to too high rotating speed.

SUMMERY OF THE UTILITY MODEL

Based on the problem, the utility model aims at providing a motor stator and radial oil cooling permanent-magnet machine solves high-speed permanent-magnet machine's cooling problem.

In order to solve the problems in the prior art, the utility model provides an one of the technical scheme is:

the utility model provides a motor stator, includes the cylindrical stator core of cavity, be equipped with on the stator core along a plurality of oil feed passageways and a plurality of oil outlet channel of radial extension, a plurality of oil feed passageways are arranged stator core's radial one side, a plurality of oil outlet channel arrange stator core's radial opposite side, a plurality of oil feed passageways, a plurality of oil outlet channel all follow stator core axial interval arranges.

Further, a plurality of oil feed passageways with a plurality of oil outlet passageways correspond and arrange.

Further, stator core includes along a plurality of stator lamination that axial segmentation arranged, is equipped with support piece between two adjacent stator lamination, support piece with form between the stator lamination oil feed passageway and the passageway that produces oil.

Furthermore, the support piece comprises two support pieces which are symmetrically arranged along the radial direction of the stator core, the two support pieces are of arc-shaped strip structures, and an oil inlet and an oil outlet are formed between the two support pieces at intervals.

In order to solve the problems in the prior art, the utility model provides a second technical scheme:

the utility model provides a radial cold permanent-magnet machine of oil, includes foretell stator core, still includes the casing, be equipped with on the casing with the cooling oil import of a plurality of oil feed passageway intercommunications, and with the cooling oil export of a plurality of oil outlet passageway intercommunications.

Further, the casing includes along stator core axial extension's casing body, fix the first end cover of casing body axial first end and fix the second end cover of casing body axial second end, cooling oil import, cooling oil export set up the radial both sides of casing body.

Furthermore, the device also comprises a rotating shaft which is rotatably arranged on the first end cover and the second end cover, and a permanent magnet which is arranged on the rotating shaft.

Further, the rotating shaft is rotatably supported on the first and second end covers via bearings.

Furthermore, a first outer cover is arranged on the outer side of the first end cover, and a second outer cover is arranged on the outer side of the second end cover.

Furthermore, a stator winding is embedded in the inner side of the stator core.

Compared with the prior art, the utility model has the advantages that:

1. an oil inlet channel and an oil outlet channel are radially arranged on the stator core, cooling oil can be introduced in the radial direction to directly cool a heating part of the motor, so that the permanent magnet is prevented from being demagnetized due to heating, an oil way does not need to be designed on the rotor, and the strength of the rotor can meet the requirement of a high-speed motor;

2. the stator core has simple structure and convenient manufacture, and can ensure good oil cooling effect.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of a motor stator of the present invention;

fig. 2 is a disassembled schematic view of an embodiment of the motor stator of the utility model;

fig. 3 is a schematic structural diagram of an embodiment of the radial oil-cooled permanent magnet motor of the present invention;

wherein:

1. a stator core; 1-1, stator lamination; 1-2, a support member; 1-2a, a support sheet; 1-2b and an oil inlet; 1-2c, an oil outlet; 1-3, an oil inlet channel; 1-4, an oil outlet channel;

2. a housing; 2-1, a casing body; 2-1a and a cooling oil inlet; 2-1b, a cooling oil outlet; 2-2, a first end cover 2-3 and a second end cover;

3. a rotating shaft;

4. a permanent magnet;

5. a stator winding;

6. a first outer cover;

7. a second outer cover;

8. and (5) a bearing.

Detailed Description

The above-described scheme is further illustrated below with reference to specific examples. It should be understood that these examples are for illustrative purposes and are not intended to limit the scope of the present invention. The conditions used in the examples may be further adjusted according to the conditions of the particular manufacturer, and the conditions not specified are generally the conditions in routine experiments.

Referring to fig. 1 and 2, for the utility model discloses structural schematic diagram provides a motor stator, including hollow column stator core 1, be equipped with along radial a plurality of oil feed passageway 1-3 and a plurality of oil outlet channel 1-4 of extending on stator core 1, wherein, a plurality of oil feed passageway 1-3 arrange in stator core 1's radial one side, a plurality of oil outlet channel 1-4 arrange at stator core 1's radial opposite side, a plurality of oil feed passageway 1-3, a plurality of oil outlet channel 1-4 all along stator core 1 axial interval arrangement.

In this example, a plurality of oil inlet passages 1-3 and a plurality of oil outlet passages 1-4 are consistent in number and are arranged in a one-to-one correspondence.

Specifically, the stator core 1 comprises a plurality of stator laminations 1-1 which are arranged along the axial direction in a segmented mode, a supporting piece 1-2 is arranged between every two adjacent stator laminations 1-1, and an oil inlet channel 1-3 and an oil outlet channel 1-4 are formed between the supporting piece 1-2 and the two adjacent stator laminations 1-1.

The supporting piece 1-2 comprises two supporting pieces 1-2a which are symmetrically arranged along the radial direction of the stator core 1, the two supporting pieces 1-2a are in arc-shaped strip structures, and the two supporting pieces are arranged in front of the arc-shaped strip structures at intervals to form an oil inlet 1-2b and an oil outlet 1-2c, in the specific implementation, the oil inlet 1-2b and the oil outlet 1-2c can be respectively formed at the two radial ends of the circular supporting pieces to obtain the two supporting pieces 1-2a which are symmetrically arranged, the two supporting pieces 1-2a and the adjacent stator lamination 1-1 are bonded or welded and fixed, and then the oil inlet channel 1-3 and the oil outlet channel 1-4 of the supporting pieces which are correspondingly arranged are formed between the two stator laminations 1-1 and the two supporting pieces 1-2 between the two stator laminations 1-1.

The utility model also provides a radial oil cooling permanent-magnet machine, including foretell stator core 1, still include casing 2, rotate pivot 3, the setting of setting in casing 2 on 3 permanent magnet bodies and inlay the stator winding 5 of establishing at 1 inboard of stator core.

The machine shell 2 comprises a machine shell body 2-1 extending along the axial direction of the stator core 1, a first end cover 2-2 fixed at the first axial end of the machine shell body 2-1 and a second end cover 2-3 fixed at the second axial end of the machine shell body 2-1, wherein cooling oil inlets 2-1a communicated with the plurality of oil inlet channels 1-3 and cooling oil outlets 2-1b communicated with the plurality of oil outlet channels 1-4 are respectively arranged at two radial sides of the machine shell body 2-1.

Two ends of the rotating shaft 3 are rotatably supported on the first end cover 2-2 and the second end cover 2-3 through bearings 8 respectively, a first outer cover 6 is arranged on the outer side of the first end cover 2-2, and a second outer cover 7 is arranged on the outer side of the second end cover 2-3.

When the motor works, cooling oil enters the plurality of oil inlet channels 1-3 on the stator core 1 through the cooling oil inlet 2-1a on the shell body 2-1 and directly cools heat generating parts (the stator core 1, the stator winding 5 and the like) of the motor through the oil outlet channels 1-4, and the cooling oil is finally discharged through the cooling oil outlet 2-1b.

The above examples are only for illustrating the technical conception and the features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention, which should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (10)

1. The utility model provides a motor stator, includes the columnar stator core of cavity, its characterized in that: be equipped with on the stator core along a plurality of oil feed passageways and a plurality of passageway of producing oil of radial extension, a plurality of oil feed passageways are arranged stator core's radial one side, a plurality of passageways of producing oil are arranged stator core's radial opposite side, a plurality of oil feed passageways, a plurality of passageways of producing oil all follow stator core axial interval arranges.

2. The electric machine stator of claim 1, wherein: the plurality of oil inlet channels correspond to the plurality of oil outlet channels.

3. The motor stator of claim 2, wherein: stator core includes a plurality of stator laminations that follow the axial segmentation and arrange, is equipped with support piece between two adjacent stator laminations, support piece with form between the stator lamination oil feed passageway and the passageway that produces oil.

4. The motor stator of claim 3, wherein: the support piece comprises two support pieces which are symmetrically arranged along the radial direction of the stator core, the two support pieces are of arc-shaped strip structures, and the two support pieces are arranged at intervals to form an oil inlet and an oil outlet.

5. The utility model provides a radial oil cooling permanent-magnet machine which characterized in that: the stator core comprises the stator core as claimed in any one of claims 1 to 4, and further comprises a casing, wherein a cooling oil inlet communicated with the oil inlet channels and a cooling oil outlet communicated with the oil outlet channels are formed in the casing.

6. The radial oil-cooled permanent magnet electric machine of claim 5, wherein: the casing includes along stator core axial extension's casing body, fix the first end cover of casing body axial first end and fix the second end cover of casing body axial second end, coolant oil import, coolant oil export set up the radial both sides of casing body.

7. The radial oil-cooled permanent magnet electric machine of claim 6, wherein: the permanent magnet motor is characterized by further comprising a rotating shaft and a permanent magnet, wherein the rotating shaft is rotatably arranged on the first end cover and the second end cover, and the permanent magnet is arranged on the rotating shaft.

8. The radial oil-cooled permanent magnet electric machine of claim 7, wherein: the rotating shaft is rotatably supported on the first end cover and the second end cover through bearings.

9. The radial oil-cooled permanent magnet electric machine of claim 8, wherein: the outside of first end cover is equipped with first enclosing cover, the outside of second end cover is equipped with the second enclosing cover.

10. The radial oil-cooled permanent magnet electric machine of claim 5, wherein: and a stator winding is embedded in the inner side of the stator core.

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