CN218633655U

CN218633655U - Rotor for improving vibration noise of rotating motor and motor

Info

Publication number: CN218633655U
Application number: CN202221925089.9U
Authority: CN
Inventors: 刘宝山; 冯锋义; 刘敢闯; 南富乾; 汪志刚
Original assignee: Chongqing Jinkang Power New Energy Co Ltd
Current assignee: Chongqing Jinkang Power New Energy Co Ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2023-03-14
Anticipated expiration: 2032-07-25

Abstract

The utility model discloses a rotor and motor for improving rotating electrical machines vibration noise, rotor include the rotor punching, the rotor is provided with the magnetic channel towards the piece on, install permanent magnetism piece in the magnetic channel, being close to the rotor is towards the piece excircle, and is located the q epaxial noise control hole that is formed with, the noise control hole communicates with each other with the inside oil duct of rotor, is formed with on the right baffle of rotor the through-hole of noise control hole intercommunication, this through-hole with noise control hole coaxial line. The motor includes the aforementioned rotor for improving vibration noise of the rotating electric machine. The beneficial effects of the utility model are that, through on the rotor punching sheet, and be located the epaxial noise control hole that sets up of q, replace the open slot of rotor excircle through the noise control hole, can avoid increasing the wind friction loss of rotating electrical machines under the high-speed operation, reduce the rotating electrical machines torque pulsation to improve rotating electrical machines's NVH performance.

Description

Rotor for improving vibration noise of rotating motor and motor

Technical Field

The utility model relates to a field of motor, especially a rotor and motor for improving rotating electrical machines vibration noise.

Background

For a permanent magnet synchronous motor, the larger the torque ripple of the rotating electric machine, the larger the noise generated, which affects the NVH performance of the rotating electric machine.

Patent application No. of prior art inventions: CN201880053769.6 "rotor core, rotor, rotating electrical machine, electric auxiliary system for automobile" discloses a rotor structure for reducing torque ripple of a rotating electrical machine, which achieves the result of reducing torque ripple of the rotating electrical machine by forming irregular notches on the outer edge of the rotor, so as to improve NVH performance of the rotating electrical machine. Although this technical scheme can reach the effect that reduces rotating electrical machines torque pulsation at present, the rotor excircle has the homogeneity that the open slot can destroy the rotating electrical machines air gap, and under the high-speed rotatory condition simultaneously, rotating electrical machines excircle open slot can increase the rotating electrical machines wind friction loss (wind friction loss is the motor rotation in-process, and the resistance that rotor surface and air friction can produce overcomes the used work of these resistances). And to permanent magnet synchronous machine, stator module temperature is higher than the rotor subassembly, and at rotatory in-process, the rotor excircle side leads to local high temperature because of heat-conduction, and present patent technology can't reach fixed point cooling effect.

Disclosure of Invention

The utility model aims at providing a rotor for improving rotating electrical machines vibration noise reduces rotating electrical machines torque ripple's effect to improve rotating electrical machines's vibration and noise, avoid increasing the lower wind friction loss of rotating electrical machines at high-speed operation simultaneously.

In order to achieve the above purpose, the utility model adopts the following technical scheme.

The utility model provides a rotor for improving rotating electrical machines vibration noise, includes the rotor punching, be provided with the magnetic channel on the rotor punching, install the permanent magnetism piece in the magnetic channel, be close to rotor punching excircle, and be located q epaxial and be formed with the hole of making an uproar, the hole of making an uproar communicates with each other with the inside oil duct of rotor.

By adopting the technical scheme, the utility model has the advantages that the noise-proof holes are arranged on the q axis on the rotor punching sheet, and the noise-proof holes replace the open slots of the excircle of the rotor, so that the torque pulsation of the rotating motor is reduced, and the NVH performance of the rotating motor is improved; the noise-proof hole does not damage the structure of the outer cylindrical surface of the rotor, so that the wind friction loss of the rotating motor in high-speed operation can be reduced, and the noise-proof hole is communicated with the oil duct in the rotor, so that the coolant in the oil duct cools the local high-temperature area of the outer cylindrical surface of the rotor, and the effects of reducing temperature and improving torque and power density are achieved.

The rotor is characterized by further comprising a left baffle and a right baffle, wherein the left baffle is positioned at one end of the rotor, which is far away from the right baffle, and the left baffle is provided with a radially extending oil groove; the noise-proof hole is communicated with the oil duct through the oil groove; and a through hole communicated with the noise-proof hole is formed in the right baffle, and the through hole and the noise-proof hole are coaxial.

The oil groove is formed in the left baffle, so that the noise-proof hole is communicated with the oil groove, the right baffle is further arranged, the through hole communicated with the noise-proof hole is formed in the right baffle, and oil in the oil duct enters from the left baffle and is thrown out from the right baffle to form a circulating passage.

Preferably, the noise-proof hole and the through hole are both round holes, and the diameters of the noise-proof hole and the through hole are the same.

The anti-noise hole penetrates through the rotor punching sheet, the inlet of the anti-noise hole is located on the outer circle of the rotor punching sheet, torque pulsation of the rotating motor is reduced, the anti-noise hole is communicated with the oil duct, and the local high-temperature area of the outer circle of the rotor is cooled at a fixed point.

Preferably, the diameter of the noise-proof hole is 0.5 mm-2.0 mm.

By setting the diameter of the noise-proof hole to the above size, the torque ripple of the rotating electrical machine can be reduced without affecting the performance of the rotor.

Preferably, the distance between the center of the noise-proof hole and the edge of the outer circle of the rotor punching sheet is 1-2.0 mm.

The distance between the center of the inlet of the noise-proof hole and the outer circle edge of the rotor punching sheet is set to be 1-2.0 mm, so that the phenomenon that the inlet of the noise-proof hole is too close to the outer circle edge of the punching sheet can be avoided, and after the rotor punching sheet is used for a long time, the hole becomes a groove, and the wind friction loss is increased.

Preferably, the noise-proof hole and the through hole are polygonal holes with equal cross-sectional areas

In order to achieve the above object, an embodiment of the present invention further provides a motor including the above rotor for improving vibration noise of a rotating electrical machine.

The utility model has the advantages that the noise-proof holes are arranged on the q axis on the rotor punching sheet, and the noise-proof holes replace the open slots of the excircle of the rotor, so that the torque pulsation of the rotating motor is reduced, and the NVH performance of the rotating motor is improved; because the noise-proof hole is not positioned on the edge of the excircle of the rotor, the increase of wind friction loss of the rotating motor in high-speed operation can be avoided. And the noise-proof hole is communicated with an oil duct formed between the rotor punching sheet and the left baffle, so that cooling liquid of the oil duct cools a local high-temperature area of the outer circle of the rotor, and the effects of reducing temperature and improving torque and power density are achieved.

Drawings

FIG. 1 is a partial block diagram of a rotor according to the present invention;

fig. 2 is a cross-sectional view of the rotor of the utility model, after the left baffle is added at the two ends of the rotor, passing through the q-axis and the center of the noise-proof hole.

Detailed Description

The present invention will be further described with reference to the accompanying drawings, which are not intended to limit the scope of the embodiments described herein.

Reference numerals in the drawings of the specification include: the rotor punching sheet comprises a rotor punching sheet 1, a left baffle 11, a noise-proof hole 2, permanent magnets 3, a magnetic slot 4, a rotating shaft 5 and an oil duct 6.

Referring to fig. 1 and 2, a rotor for improving vibration noise of a rotating electrical machine comprises a rotor punching sheet 1, wherein a magnetic slot 4 is formed in the rotor punching sheet 1, a permanent magnet block 3 is installed in the magnetic slot 4, a noise-proof hole 2 is formed on a q-axis and is close to the outer circle of the rotor punching sheet 1, and the noise-proof hole 2 is communicated with an oil duct 6 in the rotor.

Referring to fig. 1 to 2, the rotor further includes a left baffle 11 and a right baffle, the left baffle 11 is located at one end of the rotor far from the right baffle, and the left baffle 11 is provided with a radially extending oil groove; the noise-proof hole 2 is communicated with the oil passage 6 through the oil groove; and a through hole communicated with the noise-proof hole 2 is formed in the right baffle, and the through hole is coaxial with the noise-proof hole 2.

Referring to fig. 2, the noise-proof hole 2 and the through hole are both circular holes, and the diameters of the two are the same. The diameters of the noise-proof hole 2 and the through hole are both 0.5 mm-2.0 mm.

Referring to fig. 2, the distance between the center of the noise-proof hole 2 and the outer circumferential edge of the rotor sheet 1 is 1mm to 2.0mm. The anti-noise hole is arranged on the outer circle of the rotor punching sheet, so that the torque pulsation of the rotating motor is reduced, the anti-noise hole is communicated with the oil duct, and the local high-temperature area of the outer circle of the rotor is cooled at a fixed point.

The noise-proof hole 2 and the through hole are polygonal holes, and the sectional areas of the noise-proof hole and the through hole are equal.

Embodiment 2, an electric motor including the above-described rotor for improving vibration noise of a rotating electric machine.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a rotor for improving rotating electrical machines vibration noise, its characterized in that, includes rotor punching (1), be provided with magnetic slot (4) on rotor punching (1), install permanent magnetism piece (3) in magnetic slot (4), be close to rotor punching (1) excircle, and be located q epaxial and be formed with noise control hole (2), noise control hole (2) communicate with each other with inside oil duct (6) of rotor.

2. The rotor for improving the vibration noise of the rotating electrical machine according to claim 1, further comprising a left baffle (11) and a right baffle, wherein the left baffle (11) is located at one end of the rotor far away from the right baffle, and the left baffle (11) is provided with a radially extending oil groove; the noise-proof hole (2) is communicated with the oil duct (6) through the oil groove; and a through hole communicated with the noise-proof hole (2) is formed in the right baffle, and the through hole and the noise-proof hole (2) are coaxial.

3. The rotor for improving vibration noise of a rotating electrical machine according to claim 2, wherein the noise-preventing hole (2) and the through-hole are both circular holes having the same diameter.

4. The rotor for improving vibration noise of a rotary electric machine according to claim 3, wherein the diameters of the noise-preventing hole (2) and the through hole are each 0.5mm to 2.0mm.

5. The rotor for improving the vibration noise of the rotating electrical machine according to claim 4, wherein the distance between the center of the noise-proof hole (2) and the outer circumferential edge of the rotor punching sheet (1) is 1mm to 2.0mm.

6. The rotor for improving vibration noise of a rotary electric machine according to claim 2, wherein the noise preventing hole (2) and the through hole are polygonal holes having the same sectional area.

7. An electric machine comprising the rotor for improving vibration noise of a rotating electric machine according to any one of claims 1 to 6.