A permanent magnet eddy current braking device for a fixed air gap elevator

Abstract

The invention relates to a permanent magnet eddy current braking device for a fixed air gap type elevator, which comprises a built-in permanent magnet linear eddy current brake and a mechanical magnetic adjustment operating mechanism. The built-in permanent magnet linear eddy current brake includes a conductor stator and a built-in permanent magnet mover; the conductor stator is fixed in the elevator shaft, the permanent magnet mover is fixed outside the elevator car, and there is an air gap between the conductor stator and the permanent magnet mover. The relative position between the two is fixed by the guide rail. The invention adjusts the position of the magnetic regulating plate through the mechanical operating mechanism, controls the coupling magnetic flux between the built-in permanent magnetic mover and the conductor stator, and realizes the adjustment of the braking force of the permanent magnetic eddy current brake. For elevator working conditions with different loads, the invention can realize flexible braking force and elevator car braking speed adjustment through the electronic control device; in the case of sudden elevator failure and rapid fall, one-button eddy current braking can be realized, and the low-speed and uniform-speed Descending, landing smoothly.

Description

technical field [0001] The invention relates to a permanent magnet eddy current brake, in particular to a linear permanent magnet eddy current brake used for elevator braking. Background technique [0002] With the further improvement of the degree of urbanization in our country, the demand for high-rise and super high-rise buildings is increasing. In these high-rise buildings, the vertical transportation system plays a very important role. Common vertical transportation systems include rope traction elevators and linear motor drive elevators. Among them, rope traction elevators use clamp-type brake protection in the event of a rope breakage accident, and the bridge compartment is stopped by clamping the rails by spring action. [0003] The application number is 201310240175.5, which discloses a "magnetic eddy current damping safety elevator", which is composed of a motor, a reducer, a brake, a car, a counterweight, a steel wire rope fixed to the counterweight, and an eleva...

AI Technical Summary

Problems solved by technology

The disadvantage of this structure is that the braking force cannot be adjusted, and it only works when the elevator falls over speed, and cannot cooperate with the safety gear and other protection devices of the elevator itself.

The disadvantage of this structure is that adjusting the length of the gap between the permanent magnet brake and the surface of the guide rail needs to overcome the magnetic tension between the two. In addition, the braking force control accuracy is low through springs and other related operating components.

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