A Unipolar Magnet Rotary Adjustable Speed ​​Cage Magnetic Coupler

Abstract

The invention relates to the field of mechanical transmission, and relates to a unipolar magnet rotary adjustable speed cage magnetic coupler. In the present invention, the copper disk adopts a cage-shaped copper disk, and fan-shaped annular currents are generated around all the fan-shaped grooves, and the eddy current loss generated by it is small, and the transmission efficiency is high. The bump is an interference fit, and the small bump of the yoke plays a role in modulating the magnetic field, further improving the electromagnetic torque of the coupler. The coupler provides three speed regulation methods, the first is to adjust the size of the air gap between the copper disk and the permanent disk through the axial movement device, the second is to fix the size of the air gap to change the rotation angle of the rotating permanent magnet to adjust the conductor The facing area between the disk and the permanent magnet disk, the third is to use the composite speed regulation of the air gap size between the two disks moving axially and the rotating permanent magnet, so the coupler can meet the speed regulation requirements of different degrees.

Description

technical field [0001] The invention relates to the field of mechanical transmission, and relates to a magnetic transmission and speed regulating device that realizes torque transmission through non-contact induction, in particular to a unipolar magnet rotary adjustable speed cage magnetic coupler. It can be used as a transmission device for torque transmission and speed regulation between a motor with a large vibration and a load. Background technique [0002] The magnetic coupling utilizes the mutual coupling of the permanent magnetic field and the induced magnetic field to transmit torque. Its unique non-contact transmission can effectively reduce the problems of noise, vibration, friction and wear in traditional mechanical transmission, and greatly improve the performance of the transmission device. In addition, it has the function of energy saving and environmental protection. Based on the above advantages, magnetic couplers have been widely used in chemical industry, m...

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Problems solved by technology

[0003] In Chinese patent 20171041913.7, a disc-type speed-regulating magnetic coupler based on bevel gear transmission and its speed-regulating method are disclosed. The solid copper disc used in this invention has a circular shape with the same number of poles as the permanent magnet on its surface during operation. Induced current, the eddy current loss generated is relatively large. The principle of speed regulation is to convert the axial displacement of the dial block into the rotation of the large bevel gear sleeve, and realize the rotation of the permanent magnet through the meshing transmission of the bevel gear, thereby changing the permanent magnet and the conductor disk. The average facing area and air gap spacing between them also changed the arrangement of N and S poles, thereby changing the air gap flux density to achieve speed regulation, but due to the limitation of the rotation angle of the magnet, its speed regulation range Small, can not meet the speed regulation requirements of different degrees

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