A rotor multi-source confinement explosion-proof motor using magnetic fluid bearings

Abstract

The invention discloses a rotor multi-source restraint explosion-proof motor using a magnetic fluid bearing. The iron core is placed in the casing, the center of the iron core is connected to the main shaft, and the main shaft extends out of the motor from the end of the casing. The explosion-proof motor also includes a magnetic fluid bearing. , an installation slot is provided at the position where the casing is passed by the main shaft, and the magnetic fluid bearing is arranged in the installation slot. The magnetic fluid bearing includes a single bearing bush, a bushing, an end cover and a magnetic fluid. The single bushing includes a permanent magnet, an isolation block, and a seat ring; the bushing is set on the main shaft and connected with the main shaft, and the cylindrical contact surface of the bushing and the main shaft The sealing ring is arranged on the top; the seat ring is installed in the installation groove, the outer ring of the seat ring is in contact with the cylindrical surface in the installation groove, the outer edge of the permanent magnet is embedded in the inner ring of the seat ring, the inner edge of the permanent magnet is ring-shaped, and the adjacent permanent magnet A spacer is placed between the inner edges of the magnets, and the permanent magnet and the spacer form a complete cylindrical inner ring at the inner edge and is in contact with the outer surface of the bushing. Magnetic fluid is injected between the inner ring of the single bearing bush and the outer surface of the bushing.

Description

technical field [0001] The invention relates to the field of motors, in particular to a rotor multi-source constraint explosion-proof motor using magnetic fluid bearings. Background technique [0002] An electric motor is a widely used prime mover that provides raw mechanical power to various structures. [0003] In many occasions, such as most chemical occasions, the operating environment of the motor is full of flammable gas. If the flammable and explosive gas reaches the high temperature area of ​​the motor, it will cause an explosion and cause a major accident. Therefore, in these The motor in the occasion has higher explosion-proof requirements. [0004] In the prior art, most explosion-proof motors are designed by isolating high-temperature sources or lowering the theoretical operating temperature, but the isolation-type explosion-proof method is not reliable. The position where the main shaft of the motor passes through the casing is a dynamic and static part, and th...

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Problems solved by technology

[0004] In the prior art, most explosion-proof motors are designed by isolating high-temperature sources or lowering the theoretical operating temperature, but the isolation-type explosion-proof method is not reliable. The position where the main shaft of the motor passes through the casing is a dynamic and static part, and there is bound to be a running gap. How to fully ensure that the gas does not leak from this position is a motor explosion-proof problem

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