A self-protection cylindrical permanent magnet transmission device

Abstract

The invention provides a self-protection cylindrical permanent magnet transmission device comprising an inner rotor and an outer rotor. The outer rotor comprises an outer rotor shaft, an outer rotor end plate, an outer rotor motion cylinder and a conductive metal cylinder. The inner rotor comprises an inner rotor shaft, an inner rotor rotary cylinder, an inner rotor inner rotary cylinder, a sector cylinder push-pull mechanism and a radial fixing guide component. The inner rotor rotary cylinder is formed from a plurality of concentric sector cylinders, wherein a group of permanent magnet bodies are inlaid in the surface, adjacent to the outer rotor, of each sector cylinder. After the prime motor power and the working mechanism power are determined, the gap between the inner rotor structure and the outer rotor structure is adjusted to a desired value through the cooperation of the sector cylinder push-pull mechanism and the radial fixing guide component. In case of locked rotor of the permanent magnet transmission device, since repulsion force exists between the inner rotor rotary cylinder and the outer rotor motion cylinder, the sector cylinders can slide automatically and radially in the gap increasing direction, so that the locked rotor protection for the speed adjusting device is realized and damage to the speed adjustor caused by heat production of vertexes under the condition of locked rotor is prevented.

Description

technical field [0001] The invention relates to a transmission device, in particular to a self-protecting cylinder type permanent magnet transmission device. Background technique [0002] The existing permanent magnet eddy current transmission device is mainly composed of two parts: a permanent magnet rotor and a copper (or other conductor) rotor. [0003] Generally, the motor shaft and the working machine shaft are respectively connected to one of the rotors, and there is an air gap (called an air gap) between the copper rotor and the permanent magnet rotor, and there is no mechanical connection for torque transmission. In this way, a soft (magnetic) connection is formed between the motor and the working machine, and the shaft torque and speed of the working machine can be changed by adjusting the air gap, so it can adapt to various harsh environments, and because there is no direct mechanical connection, it can reduce Mechanical loss. [0004] In the existing structure, ...

AI Technical Summary

Problems solved by technology

The disc structure usually adopts the form of changing the thickness of the air gap, which is convenient for protection, but the high-power device needs a large radius and has difficulty in heat dissipation; the barrel structure usually adopts the method of changing the effective target area, which can be extended infinitely to increase the power. And the heat dissipation is convenient, but because the air gap does not change, it cannot effectively protect

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