Speed regulation asynchronous magnetic coupler with adjustable radial air gap

Abstract

The invention relates to the technical field of mechanical engineering transmission, and in particular relates to a speed regulation asynchronous magnetic coupler with an adjustable radial air gap. In the speed regulation asynchronous magnetic coupler, the radial movement of active card bodies which are uniformly distributed on a disc body is utilized to realize radial shift-in or shift-out of a permanent magnet, accurately adjust the gas gap length between the permanent magnet and a conducting bar, change the acting force of an air-gap field and realize the outputs of different rotation speeds and torques, thereby realizing purpose of stepless speed change. The speed regulation asynchronous magnetic coupler provided by the invention is mainly used between a motor and a load in industries such as oil refining, chemical industry, coal and electricity generation, or used in power transmission devices of other related mechanisms.

Description

technical field [0001] The invention relates to the technical field of mechanical engineering transmission, in particular to a speed-regulating asynchronous magnetic coupling with adjustable radial air gap, which is mainly used for the connection between motors and loads in oil refining, chemical industry, coal, power generation and other industries or other related mechanisms in the power transmission unit. Background technique [0002] In the field of mechanical engineering transmission technology, couplings are frequently used components in the power transmission process of mechanical systems. In traditional mechanical transmission systems, rigid mechanical methods are usually used to connect the driving shaft and driven shaft in different mechanisms. , to transmit torque and movement; however, the transmission system through mechanical connection is prone to failure; in addition, due to the mechanical connection, the centering accuracy between devices is very high, which...

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Problems solved by technology

[0002] In the field of mechanical engineering transmission technology, couplings are frequently used components in the power transmission process of mechanical systems. In traditional mechanical transmission systems, rigid mechanical methods are usually used to connect the driving shaft and driven shaft in different mechanisms. , to transmit torque and movement; however, the transmission system through mechanical connection is prone to failure; in addition, due to the mechanical connection, the centering accuracy between devices is very high, which is for large equipment or high-precision transmission systems Alignment installation is very difficult. Once there is an error in the alignment, the transmission system may be twisted during the work process, resulting in a major accident; and in some heavy-duty starting occasions, when the load is too large, the equipment is blocked or stuck When the phenomenon occurs, if the motor protector fails, it will also cause the motor to be burned during the working process. Therefore, it is urgent to seek a device that has no wear and vibration, can transmit constant torque and different torque, and improve transmission efficiency.

[0003] As a form of magnetic transmission, magnetic couplings, compared with traditional mechanical couplings, have no mechanical contact, friction and wear during the transmission process, and have overload protection functions. The biggest feature of magnetic couplings is that Completely seal the inner rotor and the driven shaft, change the dynamic seal into a static seal, completely solve the problem of "running, popping, dripping, and leaking" in mechanical transmission pumps, and eliminate flammable, flammable and Explosive, toxic, and harmful media leak through the pump seal, effectively ensuring safe production; however, the magnetic coupling is limited in its application range due to the demagnetization of the permanent magnet on the rotor at high temperature. , in the occasions that need to output constant torque and different torque, how to replace the frequency conversion speed regulation of the motor, realize the stepless speed change of the transmission, and improve the efficiency transmission of the coupling is one of the key issues to expand the application range of the magnetic coupling. Based on The above characteristics make it necessary to study the transmission structure of magnetic couplings.

[0004] In the patent CN201110024791.8, a permanent magnet coupling governor is disclosed, including: a cylindrical conductor rotor, a cylindrical magnetic isolation cover, a cylindrical permanent magnet rotor, and a regulator. Under the action of the regulator, the cylindrical The axial movement of the magnetic isolation cover changes the size of the facing area of ​​the cylindrical conductor rotor and the cylindrical permanent magnet rotor, thereby changing the size of the output torque. The speed regulation principle of this coupling is simple, but the magnetic isolation cover In addition, the application occasions of this coupling are limited and cannot be used in occasions with high sealing requirements and high temperature; in the patent CN201110219054.3, an adjustable axial asynchronous magnetic coupling is disclosed Device, including: inner rotor assembly, outer rotor assembly, speed regulating device and spacer sleeve, through the speed regulating device, the movement between the driving and driven wheels of the friction wheel is changed, so that the meshing area between the permanent magnet and the copper bar is changed , so as to realize the torque output. This kind of coupling is easy to operate when adjusting the speed, but it is difficult to accurately determine the adjustment distance, and the utilization rate of the permanent magnet is low; the coupling of the present invention is an adjustable radial air gap. The high-speed asynchronous magnetic coupling uses the radial movement of the movable card body evenly distributed on the disc body to realize the radial movement in or out of the permanent magnet, and accurately adjust the radial air gap length between the permanent magnet and the guide bar , changing the force of the air-gap magnetic field to achieve different speed and torque outputs, thereby achieving the purpose of stepless speed change, and at the same time improving the utilization rate of permanent magnets, providing some new ideas for the development of magnetic transmission

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