CN218472872U

CN218472872U - Motor heat radiation structure

Info

Publication number: CN218472872U
Application number: CN202122785624.7U
Authority: CN
Inventors: 陈云松; 张吉; 张海泉; 刘月; 孙康; 章铭钧
Original assignee: ANHUI TONGHUA NEW ENERGY POWER CO LTD
Current assignee: ANHUI TONGHUA NEW ENERGY POWER CO LTD
Priority date: 2021-11-15
Filing date: 2021-11-15
Publication date: 2023-02-10
Anticipated expiration: 2031-11-15

Abstract

The utility model provides a motor heat radiation structure, constitute electric motor rotor's rotor punching including the coincide, the ventilation hole has been seted up to rotor punching's yoke portion, and the ventilation hole one-to-one on the adjacent rotor punching is arranged and is constituted the route that link up the rotor both ends. The setting of ventilation hole has promoted the area of contact of rotor with the air among the above-mentioned scheme, forms the ventilation circulation of rotor, and the inside ventilation circulation wind path of effectual formation motor takes away the inside heat of rotor with higher efficiency.

Description

Motor heat radiation structure

Technical Field

The utility model relates to a motor spare part field specifically is exactly a motor heat radiation structure.

Background

In many industrial environments, motors can be used, and front and rear bearings of the motors are easy to generate heat when the motors run, so that the service lives of the motors are influenced, and the motors are easy to overheat and damage. The good ventilation effect is one of important factors for improving the utilization rate of the motor, the electromagnetic load and the motor material, and the traditional motor adopts a shell surface cooling mode. That is, the heat generated in the motor is transferred to the surface of the casing through the air circulation inside the motor and other heat conduction components such as the rotor core, and is carried away by other cooling media such as wind, oil, water and the like.

In the prior art, for a traditional motor, the design of a heat dissipation air channel corresponding to heat dissipation is not made in the motor, and only structures such as a heat dissipation air channel are arranged outside the motor, and the structure design is mainly performed on the internal structure of the motor by aiming at a magnetic circuit. The main heat dissipation mechanism inside the motor is arranged inside the motor, the motor is divided into two cavities, and the front end and the rear end of the motor are respectively subjected to air conduction and heat transfer through air in the rotor blade stirring cavity. The heat of the part close to the fan or the cooling medium inlet of the motor shell is low, and the motor temperature at the rear part of the cooling medium is high, so that the uniform heat dissipation of the motor is not facilitated. Although the inside of the motor rotor continuously rotates, the lack of the corresponding heat dissipation air duct can cause that local air cannot circulate, so that heat is rapidly increased locally to affect the performance of the motor. If the air quantity or flow of the fan is increased and the proper process performance is improved, the method can increase the overall cost of the motor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a make unobstructed motor heat radiation structure of inside air current of motor.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a motor heat radiation structure, includes that the coincide constitutes the rotor punching of electric motor rotor, and the ventilation hole has been seted up to the yoke portion of rotor punching, and the ventilation hole one-to-one on the adjacent rotor punching arranges and constitutes the route that link up the rotor both ends.

The setting of ventilation hole has promoted the area of contact of rotor with the air among the above-mentioned scheme, forms the ventilation circulation of rotor, and the inside ventilation circulation wind path of effectual formation motor takes away the inside heat of rotor with higher efficiency.

Drawings

FIG. 1 is a prior art rotor ventilation path diagram;

FIG. 2 is a rotor ventilation path diagram of the present invention;

fig. 3, 4 and 5 are schematic structural diagrams of three embodiments of the present invention.

Detailed Description

A motor heat radiation structure comprises rotor sheets 10 which are overlapped to form a motor rotor, wherein the yoke part 11 of each rotor sheet 10 is provided with a ventilation hole, and the ventilation holes on the adjacent rotor sheets 10 are arranged in a one-to-one correspondence mode to form a passage which penetrates through two ends of the rotor. The yoke 11 is a portion of the stator slot bottom and the outer edge of the stator core, which is used to connect all the teeth. That is to say, the structure is a structural part, and the ventilation holes arranged on the structure can not cause excessive influence on the magnetic circuit of the whole rotor. The contact area of the rotor and air is increased due to the arrangement of the ventilation holes, the ventilation circulation of the rotor is formed, the ventilation circulation air path in the motor is effectively formed, and the heat in the rotor is taken away with higher efficiency.

The ventilation holes are arranged around the motor rotor shaft core 1 in an annular array. The ventilation holes arranged in the annular array can increase the ventilation area, and meanwhile, the rotor quality can be reasonably and uniformly distributed, and the vibration caused by the uneven rotor quality is avoided.

The ventilation holes are arranged in the radial direction of the rotor punching sheet 10 for 2-4 circles. The ventilation holes are arranged in a plurality of layers through the small holes, so that the ventilation area is increased, and the structural strength of the rotor punching sheet 10 is ensured.

The first embodiment is as follows: as shown in fig. 3, the vent hole is an arc hole 12 structure, and the curvature axis of the arc hole 12 is consistent with the axis 1 of the motor rotor. The arc-shaped hole 12 is convenient to machine and manufacture.

The second embodiment: as shown in fig. 4, the vent hole is in a sector trapezoidal hole 13 structure, and the curvature axis of the sector trapezoidal hole 13 is consistent with the motor rotor axis 1.

Example three: as shown in fig. 5, the vent hole is a trapezoidal hole 14 or a circular hole. The trapezoidal hole can form parallel relation between two adjacent ventilation holes relative to the ventilation holes with other shapes, namely parallel teeth, so that the influence on a magnetic circuit is minimum under the condition of maximum ventilation quantity, and the heat dissipation area can be increased by making a plurality of layers of ventilation holes.

The air vents on the adjacent rotor punching sheets 10 form 1-3 degrees of deviation around the motor rotor shaft core 1. Thus, an inclined air duct can be formed instead of a straight air duct parallel to the motor rotor shaft core 1. The use of the inclined air duct can increase the blowing area of the air flow to the rotor punching sheet 10, the air flow only contacts with the hole wall of the ventilation hole when passing through the straight air duct, and the use of the inclined air duct can simultaneously contact the part of the rotor punching sheet 10 exposed in a staggered manner.

Claims

1. The utility model provides a motor heat radiation structure, includes that the coincide constitutes electric motor rotor's rotor punching (10), its characterized in that: the yoke portion (11) of the rotor punching sheet (10) is provided with vent holes, and the vent holes on the adjacent rotor punching sheets (10) are arranged in a one-to-one correspondence mode to form a passage penetrating through two ends of the rotor.

2. The motor heat dissipation structure of claim 1, wherein: the ventilation holes are arranged in an annular array around the motor rotor shaft core (1).

3. The motor heat dissipation structure of claim 1, wherein: the ventilation holes are arranged in the radial direction of the rotor punching sheet (10) for 2-4 circles.

4. The motor heat dissipation structure according to claim 1, 2, or 3, characterized in that: the ventilation hole is of an arc-shaped hole (12) structure, and a curvature shaft core of the arc-shaped hole (12) is consistent with a motor rotor shaft core (1).

5. The motor heat dissipation structure according to claim 1, 2, or 3, wherein: the ventilation hole is of a sector trapezoidal hole (13) structure, and a curvature shaft core of the sector trapezoidal hole (13) is consistent with a motor rotor shaft core (1).

6. The motor heat dissipation structure according to claim 1, 2, or 3, wherein: the vent holes are trapezoidal holes (14) or round holes.

7. The motor heat dissipation structure according to claim 1, 2, or 3, characterized in that: the vent holes on the adjacent rotor punching sheets (10) form an offset of 1-3 degrees around the motor rotor shaft core (1).