A magnetic levitation drive device

Abstract

The invention provides a magnetic suspension type driving device. A magnetic suspension unit is adopted in the device, one ends of magnetic suspension supporting bodies in the magnetic suspension unit are fixedly connected with a movable workpiece table, the protruding parts at the other ends of the magnetic suspension supporting bodies bear permanent magnet rotors, the permanent magnet rotors and permanent magnet stators borne by the protruding parts of main supports are of a vertically opposite and interstitial arrangement structure, and therefore when linear motor rotors are powered on and linear thrust is generated between the linear motor rotors and the permanent magnet stators, on one hand, the movable workpiece table bearing a movable component can be driven to move on guide rails along sliding blocks, and on the other hand, due to the fact that the normal attraction force between the liner motor rotors and the stators balances the load gravity of the movable component, the loads of the guide rails are effectively reduced, the mechanical abrasion of the magnetic suspension type driving device is greatly reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to a drive device in the field of precision automation, in particular to a magnetic levitation drive device, which is suitable for a long-stroke and heavy-load linear movement system. Background technique [0002] The conventional linear moving unit generally adopts a rotating motor plus mechanical transmission parts such as rack and pinion, screw, synchronous belt, chain, etc., to realize indirect-driven linear motion. Although this indirect drive method can achieve general or even high-speed linear motion, the mechanical transmission parts are likely to reduce system reliability and transmission efficiency, and there are mechanical wear and mechanical clearances. The system life is limited due to mechanical wear or fatigue failure. Regular maintenance or replacement of mechanical transmission parts is required. In some long stroke and heavy load occasions, the mechanical wear, energy loss and fatigue failure caused by heavy loa...

AI Technical Summary

Problems solved by technology

[0006] In the field of rail transportation, as described in the invention patent CN201210062887.8, some researchers have proposed a magnetic levitation structure using normal suction, but these magnetic levitation structures often only use pulleys or wheels for auxiliary support and guidance, and are not suitable for precision direct motion.

In addition, there are generally only two maglev support parts in many direct motion units with maglev structures, which often easily lead to large deformation of the moving table, and are not suitable for precision direct motion fields.

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