Interaxial permanent magnet coupling mechanism

Abstract

The invention relates to a mechanism transmission device, in particular to an interaxial permanent magnet coupling mechanism used for transmitting torque between two axes of rotation. The mechanism comprises an inner permanent magnet rotor and an outer permanent magnet rotor, which are arranged coaxially, wherein the outer permanent magnet rotor is shaped like a cylinder; the inner permanent magnet rotor is arranged in the inner cavity of the outer permanent magnet rotor; inner permanent magnets and outer permanent magnets are distributed on the inner permanent magnet rotor and the outer permanent magnet rotor respectively; an air gap is formed between the inner permanent magnet rotor and the outer permanent magnet rotor; a plurality of inner permanent magnets on the inner permanent magnet rotor are distributed along the circumference; inner magnetizers made of permeability magnetic materials are put between the adjacent inner permanent magnets; the magnetic pole directions of the inner permanent magnets are in the circumferential direction of the inner permanent magnet rotor; and the magnetic pole directions of the adjacent inner permanent magnets are opposite or reverse. The mechanism can transmit bigger torque, can adjust the transmitted torque, has compact structure and low requirement for installation precision and is stable and reliable in transmission and adjustment.

Description

technical field [0001] The invention relates to a mechanism transmission device, in particular to an inter-shaft permanent magnetic coupling mechanism for torque transmission between two rotating shafts. Background technique [0002] For torque output and adjustment, there are many ways in the prior art, including: [0003] 1. Coupling mechanisms widely used in industry at present, these mechanisms are mostly rigid or hydraulic coupling connections, and the transmission torque and speed cannot be adjusted. Due to the complex and changeable operating conditions of the system, it is difficult to accurately ensure the alignment of the two axes. After a period of operation, the equipment will vibrate, which will accelerate wear and shorten the life of the equipment. [0004] 2. At present, frequency conversion and speed regulation are widely used in industrial sites. The output speed is controlled by controlling the motor. The price is relatively expensive, and the structure an...

AI Technical Summary

Problems solved by technology

Due to the complex and changeable operation of the system, it is difficult to accurately ensure the alignment of the two axes, and the equipment will vibrate after a period of operation, thereby accelerating wear and shortening the life of the equipment

[0004] 2. At present, frequency conversion and speed regulation are widely used in industrial sites. The output speed is controlled by controlling the motor. The price is relatively expensive, and the structure and operation are complicated. The power electronic devices of the frequency converter work in the switch state, thus generating a large number of harmonics and polluting the power grid. Affects communication, and the stability of electronic devices is not good, it is easy to age, the service life is not long, and the requirements for the environment are high, and there are great requirements for the ambient temperature, humidity and dust, so it is not suitable for working in harsh environments

In this type of coupler with existing structures, the direction of the magnetic field in the permanent magnets distributed along the circumference is usually perpendicular to the magnetic field action surface between the conductor rotor and the permanent magnet rotor, and the magnetic field distribution is scattered and the intensity is not high (the highest magnetic induction The strength can only reach 400~500mT), if you want to transmit a large torque, you need to make the structure larger, which limits the promotion of this technology

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