CN204538837U - A kind of new structure of permanent magnetism rotor with non-salient poles - Google Patents

Abstract

A new structure for permanent magnetism rotor with non-salient poles, belongs to p-m rotor field, and it comprises the motor shaft shoulder, gimbal, permanent magnet, stainless steel sleeve, yoke, anti-corrosion material, and welding end surface.The new structure of the permanent magnetism rotor with non-salient poles that the utility model provides realizes the optimization to rotor spindle structure, improves the sealing of permanent magnet, weakens permanent magnet and directly contact caused oxidation with air, extend physical life.

Description

A new structure of permanent magnet hidden pole rotor

technical field

The utility model relates to the field of permanent magnet rotors, in particular to a novel structure of a permanent magnet hidden pole rotor.

Background technique

With the continuous improvement and improvement of the performance of permanent magnet materials, especially the improvement of thermal stability and corrosion resistance of NdFeB permanent magnets, and the further development and improvement of power electronic components, the use of permanent magnet motors is becoming more and more extensive. . As a metal material, permanent magnets are prone to oxidation when in direct contact with air. Once oxidized, it will seriously affect the performance of the motor. Therefore, how to improve the corrosion resistance of the permanent magnets in the motor is the key to improving the reliability of the motor.

In the new structure of the high-speed rotor shaft invented by Teberkop Co., Ltd., a shaft sleeve is provided to ensure that the permanent magnet of the motor will not be thrown out of the rotor shaft at high speed and cause structural separation. This solution ensures that the permanent magnet will not be cracked or disassembled when the motor rotates at a high speed and has a large centrifugal force.

On the basis of the above-mentioned patents, the utility model proposes a further reliable improvement of the rotor structure of the servo motor, realizes further protection of the permanent magnet of the rotor, enhances the sealing protection of the permanent magnet, and prolongs the service life of the motor.

Utility model content

The purpose of the utility model is to provide a reliable improvement of the rotor structure of the servo motor, realize the optimization of the rotor shaft structure, improve the sealing performance of the permanent magnet, weaken the oxidation caused by the direct contact between the permanent magnet and the air, and prolong the practical life.

The utility model provides a novel structure of a permanent magnet hidden pole rotor, comprising: a motor shaft shoulder, a balance ring, a permanent magnet, a stainless steel sleeve, a magnetic yoke, an anti-corrosion material, and a welding end face.

Preferably, the outer diameters of the motor shaft shoulder and the balance ring both extend to the outer diameter of the permanent magnet.

Preferably, the length of the stainless steel sleeve 1 extends to cover the motor shaft shoulder and the outer edge of the balance ring, so as to completely envelop the permanent magnet.

Preferably, the outer surface of the permanent magnet is coated with an anti-corrosion material, thereby reducing the area of the permanent magnet in direct contact with the outside air.

Preferably, after the stainless steel sleeve and the balance ring are heat-fitted, the stainless steel sleeve is welded to the motor shaft shoulder and the balance ring to form a welded end surface, so that no gap is left at the connection.

The utility model features are as follows:

(1) Effectively enhance the sealing protection of the permanent magnet, weaken the oxidation caused by the direct contact between the permanent magnet and the air, and prolong the service life of the motor;

(2) The axial movement of the permanent magnet and the yoke is effectively prevented, and the reliability of the motor is enhanced.

Compared with the existing schemes at home and abroad, this technical scheme realizes the effective protection of the permanent magnet of the servo motor, has simple structure and good reliability.

Description of drawings

The utility model will now be described in conjunction with the accompanying drawings.

Figure 1 is a schematic diagram of the improvement of the rotor structure of the high-reliability servo motor.

Among them, 1 stainless steel sleeve; 2 permanent magnet; 3 yoke; 4 improved balance ring; 5 improved shaft shoulder; 6 welded end face; 7 anti-corrosion material.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described.

Figure 1 is a schematic diagram of the improvement of the rotor structure of the high-reliability servo motor. Expand the outer diameter of the motor shaft shoulder 5 and the balance ring 4 so that they can both extend to the outer diameter of the permanent magnet, extend the length of the stainless steel sleeve 1 until it covers the outer edge of the shaft shoulder and the balance ring, so as to achieve the alignment of the permanent magnet 2 complete envelope of . Before installing the stainless steel sleeve 1, the outer circle of the permanent magnet should be anti-corrosion treated, that is, the anti-corrosion material 7 should be applied on the surface, so as to reduce the direct contact area between the permanent magnet and the external air and improve the corrosion resistance. After installing the stainless steel sleeve 1 and the balance ring 4 respectively, after hot fitting respectively, the stainless steel sleeve 1 is welded to the shaft shoulder 5 and the balance ring 4 respectively to form a welded end face 6, so that no gap is left at the joint to further protect the permanent magnets to improve their corrosion resistance.

Claims (4)

1. the new structure of a permanent magnetism rotor with non-salient poles, comprise: the motor shaft shoulder (5), gimbal (4), permanent magnet (2), stainless steel sleeve (1), yoke (3), anti-corrosion material (7), and welding end surface (6), it is characterized in that: the described motor shaft shoulder (5) all extends to the outer radius of permanent magnet (2) with the external diameter of gimbal (4), the length of described stainless steel sleeve (1) extends to the outer rim covering the motor shaft shoulder (5), gimbal (4), thus to the complete envelope of permanent magnet.

2. the new structure of permanent magnetism rotor with non-salient poles according to claim 1, is characterized in that:

Described stainless steel sleeve (1) is configured to the thin-wall construction that non-magnetic rustproof Steel material is formed, and wall thickness is 0.2 ~ 0.5mm.

3. the new structure of permanent magnetism rotor with non-salient poles according to claim 1, is characterized in that: the outer round surface of described permanent magnet smears anti-corrosion material (7), thus the area that minimizing permanent magnet directly contacts with extraneous air.

4. the new structure of the permanent magnetism rotor with non-salient poles according to any one of claim 1-3, it is characterized in that: after hot charging stainless steel sleeve (1) and gimbal (4), stainless steel sleeve (1) is welded with the motor shaft shoulder (5) and gimbal (4), form welding end surface (6), thus do not interspace in junction.