CN216564691U

CN216564691U - Double-external-cooling inner rotor permanent magnet synchronous motor

Info

Publication number: CN216564691U
Application number: CN202123064976.XU
Authority: CN
Inventors: 万成超
Original assignee: Shenyang Anton Electric Co ltd
Current assignee: Shenyang Anton Electric Co ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-05-17
Anticipated expiration: 2031-12-08

Abstract

The utility model belongs to the technical field of permanent magnet synchronous motors, and particularly relates to a double-external-cooling inner rotor permanent magnet synchronous motor. The heat of the rotor is radiated outwards through the ventilation hole of the rotor support. The stator comprises a stator core and a rotor core which are arranged on a stator shell; the axial flow fan is characterized in that the bottom of a stator shell is arranged on a flange end cover, a motor upper end cover is fixed at the top of the stator shell, and the motor upper end cover is provided with the axial flow fan; the rotor iron core is fixed on the rotor bracket; the flange end cover is provided with a flange end cover vent hole; an upper end cover vent hole is formed in the upper end cover of the motor; and the rotor support is provided with axial ventilation holes and axial heat dissipation ribs.

Description

Double-external-cooling inner rotor permanent magnet synchronous motor

Technical Field

The utility model belongs to the technical field of permanent magnet synchronous motors, and particularly relates to a double-external-cooling inner rotor permanent magnet synchronous motor.

Background

The rotor part of an inner rotor permanent magnet synchronous motor for a low-speed large-torque mixer at home wraps the whole stator structure inside, and the stator is in a state of being sealed by the rotor; the rotor part is connected with the motor load at one time through a motor shaft, and the motor is required to be disassembled integrally in the motor maintenance process.

The prior technical scheme has the following defects: the motor stator is completely wrapped by the rotor, the motor stator can not dissipate heat by utilizing air convection, and in the similar low-speed large-torque permanent magnet synchronous motor, the heating proportion of the stator to the whole heating proportion of the motor is larger, so that the motor can not generate heat seriously due to the fact that the stator can not dissipate heat. Meanwhile, the current motor products are made of common materials: the insulating material of the stator is high in temperature resistance (H-level 180 ℃), but the temperature resistance level of the permanent magnet of the rotor needs to reach the same temperature (H-level 180 ℃), the cost is greatly increased, the temperature of the stator and the rotor in the conventional product is basically consistent, and the temperature resistance level of the permanent magnet can only be achieved, so that the problems of material waste, motor volume increase, cost increase caused by material consumption increase and the like are caused.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides a double-external-cooling inner rotor permanent magnet synchronous motor.

In order to achieve the purpose, the utility model adopts the following technical scheme that the stator comprises a stator iron core and a rotor iron core, wherein the stator iron core and the rotor iron core are arranged on a stator shell; the axial flow fan is characterized in that the bottom of the stator shell is arranged on the flange end cover, the top of the stator shell is fixedly provided with a motor upper end cover, and the motor upper end cover is provided with the axial flow fan.

The rotor iron core is fixed on the rotor bracket; the flange end cover is provided with a flange end cover vent hole; an upper end cover vent hole is formed in the upper end cover of the motor; and the rotor support is provided with axial ventilation holes and axial heat dissipation ribs.

Furthermore, the flange end cover is provided with a flange mounting hole, and is connected with a load through the flange mounting hole.

Furthermore, a support rib with a heat dissipation function is arranged on the flange end cover.

Further, the axial heat dissipation rib is connected with the motor rotor shaft.

Furthermore, one end of the motor rotor shaft is connected with the upper end cover of the motor through an upper bearing, and the other end of the motor rotor shaft is connected with the flange end cover through a lower bearing.

Furthermore, the upper bearing is fixed by an upper bearing gland, and the lower bearing is fixed by a lower bearing gland.

Furthermore, an upper end cover sealing groove used for sealing with an upper end cover is arranged on the inner edge of the first end of the rotor support, and a flange end cover sealing groove used for sealing with a flange end cover is arranged on the outer edge of the second end of the rotor support.

Compared with the prior art, the utility model has the beneficial effects.

The utility model adopts the form of the heat dissipation ribs and the ventilation pore channels of the inner rotor, and the heat of the rotor is dissipated outwards through the ventilation pore channels of the rotor bracket. The double external cooling structure is formed, the rotor of the inner rotor motor is difficult to radiate, and the cost is reduced on the premise of the same performance.

Drawings

The utility model is further described with reference to the following figures and detailed description. The scope of the utility model is not limited to the following expressions.

Fig. 1-2 are structural diagrams of a double outer cooling inner rotor permanent magnet synchronous motor according to a specific embodiment.

Fig. 3 is a structure diagram of a flange end cover of a double outer cooling inner rotor permanent magnet synchronous motor according to a specific embodiment.

Fig. 4 is a structure diagram of an upper end cover of a double outer cooling inner rotor permanent magnet synchronous motor in the embodiment.

Fig. 5 is a structural diagram of a rotor support of a double outer cooling inner rotor permanent magnet synchronous motor according to an embodiment.

Fig. 6-7 are overall appearance structural diagrams of the double outer-cooling inner rotor permanent magnet synchronous motor according to the embodiment.

Detailed Description

As shown in fig. 1-7, the stator core 1 is fixed on the stator housing 3, and the stator housing 3 is fixed on the flange end cover 4; the flange end cover 4 has flange end cover vent holes 8 and is connected to a load through flange mounting holes 17.

Meanwhile, the flange end cover is provided with a support rib 18 with a heat dissipation function, the upper end of the machine shell is fixed by an upper end cover 19, and the upper end cover is provided with a vent hole 12.

The motor rotor (shaft) 6 is connected to the upper end cap 19 and the flange end cap 4 via bearings (upper bearing 5 and lower bearing 15), and is fixed to the lower bearing cover 7 by the upper bearing cover 16.

The rotor core 2 is fixed to a rotor frame 10.

The rotor support 10 has an axial ventilation structure, and can realize motor stator sealing at the first position 9 and the second position 11 through an upper end cover sealing groove 20 and a flange end cover sealing groove 21, an upper end cover 19 and a flange end cover 4; meanwhile, the motor rotor has the heat dissipation function, and has the characteristic of convenience in maintenance.

The working principle is as follows: the motor rotor iron core 2 and the electronic rotor shaft are provided with heat dissipation vent holes, and the axial flow fan 14 drives air to pass through: and the flange end cover vent hole 8, the rotor support vent hole and the upper end cover vent hole 12 flow out to take out the heat of the rotor.

And rotor core 2 fixes on the spider, and the spider has axial ventilation hole and heat dissipation muscle, and axial heat dissipation muscle is as an organic whole with the axle. The space between the heat dissipation ribs is through along the axial direction, the heat of the rotor can be directly taken away by convection cooling air, and the problem that the inner rotor motor is difficult to dissipate heat is solved.

The temperature of the motor rotor is low, the risk of demagnetization of the magnetic steel is reduced, the heat load of the motor can be improved under the same condition, the output of the motor is increased, and the problem of high cost of the similar motor is solved.

The utility model enables the outer rotor permanent magnet synchronous motor to have the characteristic of double external cooling, solves the problem of difficult heat dissipation of the inner rotor motor rotor, and reduces the cost on the premise of the same performance.

The utility model greatly reduces the maintenance difficulty of the inner rotor permanent magnet synchronous motor and reduces the maintenance cost.

It should be understood that the detailed description and specific examples, while indicating preferred embodiments of the utility model, are given by way of illustration only, not limitation, and it will be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the utility model; as long as the use requirements are met, the method is within the protection scope of the utility model.

Claims

1. A double external cooling inner rotor permanent magnet synchronous motor comprises a stator core and a rotor core which are arranged on a stator shell; the method is characterized in that: the bottom of the stator shell is arranged on the flange end cover, the top of the stator shell is fixed with an upper end cover of a motor, and the upper end cover of the motor is provided with an axial flow fan;

2. The double outer-cooled inner rotor permanent magnet synchronous motor according to claim 1, wherein: and the flange end cover is provided with a flange mounting hole and is connected with a load through the flange mounting hole.

3. The double outer-cooled inner rotor permanent magnet synchronous motor according to claim 1, wherein: and the flange end cover is provided with a support rib with a heat dissipation effect.

4. The double outer-cooled inner rotor permanent magnet synchronous motor according to claim 1, wherein: and the axial heat dissipation ribs are connected with the motor rotor shaft.

5. The double outer-cooled inner rotor permanent magnet synchronous motor according to claim 4, wherein: one end of the motor rotor shaft is connected with the upper end cover of the motor through an upper bearing, and the other end of the motor rotor shaft is connected with the flange end cover through a lower bearing.

6. The double outer-cooled inner rotor permanent magnet synchronous motor according to claim 5, wherein: the upper bearing is fixed by an upper bearing gland, and the lower bearing is fixed by a lower bearing gland.

7. The double outer-cooled inner rotor permanent magnet synchronous motor according to claim 1, wherein: the inner edge of the first end of the rotor support is provided with an upper end cover sealing groove used for sealing with an upper end cover, and the outer edge of the second end of the rotor support is provided with a flange end cover sealing groove used for sealing with a flange end cover.