CN110601444A

CN110601444A - Motor cooling structure

Info

Publication number: CN110601444A
Application number: CN201910876318.9A
Authority: CN
Inventors: 欧加祥; 赵云峰; 施大顺; 侯文娟; 汪尧玉; 吴学钎
Original assignee: ANHUI TONGHUA NEW ENERGY POWER Co Ltd
Current assignee: ANHUI TONGHUA NEW ENERGY POWER Co Ltd
Priority date: 2019-09-17
Filing date: 2019-09-17
Publication date: 2019-12-20

Abstract

The invention belongs to the technical field of motors, and particularly relates to a motor cooling structure which comprises a motor shell, wherein a cylindrical cover body is arranged at the end part of the motor shell, an impeller is arranged in a cavity formed by enclosing the cover body and the motor shell, an air inlet is formed in the side wall of the cover body, an air outlet is formed by a gap between the side wall of the cover body and the motor shell, and a sound absorbing layer is arranged on the inner wall surface of the bottom wall of the cover body. The invention changes the arrangement of the air inlets on the cover body, changes the flow path of the cooling air flow, avoids the noise caused by air flow convection, and simultaneously, the sound-absorbing material is arranged in the cover body, so that the noise generated by the air flow directly impacting the cover body is prevented, thereby greatly reducing the working noise of the cooling structure and ensuring the stable operation of the motor.

Description

Motor cooling structure

Technical Field

The invention belongs to the technical field of motors, and particularly relates to a motor cooling structure.

Background

The motor can generate heat in the running process, and the heat is not timely dissipated, so that the normal use and the service life of the motor can be directly influenced. In the prior art, a fan impeller is generally installed at the tail end of a motor, in order to prevent foreign matters from affecting the rotation of the impeller, a cover body is generally arranged outside the impeller, and an air inlet is arranged on the rear end face of the cover body. When the motor is used, air enters the inner cavity of the cover body from the air inlet and then flows to the head of the motor shell along the outer wall of the motor shell, so that heat generated during operation of the motor is taken away. However, after the airflow in the inner cavity of the shell is blocked by the end cover of the motor, turbulent flow is generated and squeaking is generated, the working environment is seriously polluted, the physical and mental health of operating personnel is influenced, the shell with a thin wall body can also generate vibration under the action of the airflow, and the vibration is transmitted to the motor to influence the working stability of the motor.

Disclosure of Invention

The invention aims to provide a motor cooling structure which is stable in operation and low in noise.

In order to realize the purpose, the invention adopts the technical scheme that: the utility model provides a motor cooling structure, includes motor casing, and motor casing's tip is equipped with the cover body of tube-shape, and the cover body encloses with motor casing and is equipped with the impeller in closing the cavity that constitutes, has seted up the air intake on the lateral wall of the cover body, and the clearance between cover body lateral wall and the motor casing constitutes the air outlet, is equipped with the sound absorbing layer on the internal face of cover body diapire.

Compared with the prior art, the invention has the following technical effects: through changing the arrangement of air inlet on the cover body, change the flow path of cooling air current, avoid the noise of howling that the air current convection current leads to, simultaneously, at the internal acoustic material that sets up of cover, prevent the noise that the air current directly strikes the cover body and produce to reduce cooling structure's noise at work by a wide margin, guarantee the steady operation of motor.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

FIG. 1 is a schematic view of a cover;

fig. 2 is a schematic diagram of the present invention.

In the figure: 11. the motor comprises a motor shell 12, a motor shaft 20, a cover body 21, an air inlet 22, an air outlet 23, a sound absorption layer 30, an impeller 31 and blades.

Detailed Description

The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.

A motor cooling structure comprises a motor shell 11, wherein a cylindrical cover body 20 is arranged at the end part of the motor shell 11, an impeller 30 is arranged in a cavity formed by enclosing the cover body 20 and the motor shell 11, an air inlet 21 is formed in the side wall of the cover body 20, an air outlet 22 is formed by a gap between the side wall of the cover body 20 and the motor shell 11, and a sound absorbing layer 23 is arranged on the inner wall surface of the bottom wall of the cover body 20.

In use, cooling gas enters the inner cavity of the cover body from the side wall of the cover body 20, flows along the axial direction of the cover body 20 and is discharged from the air outlet 21. If the cooling air is blocked by the motor housing 11 to generate air flows moving away from the air outlet 22, the included angle between the air flows and the original flow path of the cooling air is arranged, so that the influence of convection of the cooling air flow in the cover body 20 on the flow efficiency of the cooling air can be prevented, and the generation of squeaking sound can be avoided. The sound absorbing layer 23 can provide a buffer for the air flow flowing to the bottom wall of the cover 20, and avoid the noise generated by the air flow impacting the bottom wall of the cover 20.

Preferably, the impeller 30 is connected to the motor shaft 12 and configured to rotate in unison therewith.

Preferably, the impeller 30 is disposed adjacent to the air inlet 21, the impeller 30 includes a blade 31, and the projection of the blade 31 and the air inlet 21 on the cross section of the through-shaft core has an overlapped section. Therefore, the cooling efficiency can be improved, the space can be saved, and the volume of the cooling structure is reduced.

Preferably, the central axis of the cover 20 coincides with the axis of the motor shaft 12, and the sidewall of the cover 20 is fitted over the outer peripheral wall of the motor housing 11 and forms a clearance fit therewith. That is, the outlet 12 is annular as a whole. The portion of the cover 20 that is sleeved outside the motor housing 11 provides a guide for the cooling air flow, so that the cooling air flow can flow along the axial direction of the outer wall of the motor housing 11 to the front end thereof, thereby ensuring the cooling effect.

Preferably, the sound absorption layer 23 is made of a non-metal porous material, and is laid on or adhered to the inner wall surface of the bottom wall of the cover 20. In this embodiment, the sound absorbing layer 14 is made of sponge.

Claims

1. A motor cooling structure including a motor casing (11), characterized in that: the end part of the motor shell (11) is provided with a cylindrical cover body (20), an impeller (30) is arranged in a cavity formed by enclosing the cover body (20) and the motor shell (11), the side wall of the cover body (20) is provided with an air inlet (21), a gap between the side wall of the cover body (20) and the motor shell (11) forms an air outlet (22), and the inner wall surface of the bottom wall of the cover body (20) is provided with a sound absorbing layer (23).

2. The motor cooling structure according to claim 1, wherein: the impeller (30) is connected to the motor shaft (12) and is configured to rotate synchronously therewith.

3. The motor cooling structure according to claim 2, wherein: the impeller (30) is arranged adjacent to the air inlet (21), the impeller (30) comprises a blade (31), and the projection of the blade (31) and the projection of the air inlet (21) on the cross section of the through shaft core are provided with overlapped sections.

4. The motor cooling structure according to claim 1, wherein: the central axis of the cover body (20) is superposed with the shaft core of the motor shaft (12), and the side wall of the cover body (20) is sleeved on the peripheral wall of the motor shell (11) and forms clearance fit with the motor shell.

5. The motor cooling structure according to claim 1, wherein: the sound absorption layer (23) is made of non-metal porous material and is laid or adhered on the inner wall surface of the bottom wall of the cover body (20).