Outer cup rotary axial eddy current damper

Abstract

The invention relates to a large-sized axial eddy current damper manufactured by using screw drive. The damper comprises a drive component and an eddy current damping generator, wherein the drive component comprises a screw drive pair, a stator and a rotor; the stator and the rotor are made of a magnetic conductive material; the screw drive pair comprises a screw and a nut which is arranged on the screw in a sleeving manner; the screw penetrates through an upper flange central hole of the stator and a lower flange central hole of the stator in sequence, and the nut is arranged in the stator; the rotor comprises an outer rotor and an inner rotor of which the bottom is provided with a lower connecting flange; one or more eddy current damping generators are arranged between the stator and the rotor. According to the damper, the damping coefficient and the inertial mass moment of the rotary eddy current damping part can be enlarged by hundreds of thousands of times to be converted into extremely large axial damping coefficient and axial equivalent added mass; meanwhile the problem that the axial damper with a large damping coefficient and the anti-seismic damper with a simulation speed index of being less than 1 are difficult to manufacture by using the rotary eddy current damping is solved.

Description

technical field [0001] The invention relates to a large-scale axial electric eddy current damper made by screw transmission. Background technique [0002] The basic principle of eddy current damping is: when the conductor plate in the local magnetic field cuts the magnetic force line, an eddy current will be generated in the conductor plate, and the eddy current will generate a new magnetic field opposite to the direction of the original magnetic field, thus creating a gap between the original magnetic field and the conductor. It forms a damping force that hinders the relative movement of the two, and at the same time, the resistance effect of the conductor plate converts the kinetic energy obtained by the conductor plate into heat energy and dissipates it through eddy currents. If the conductor plate is connected with the vibrating structure, it can produce the effect of structural vibration reduction and energy consumption, and become an eddy current damper. Compared with...

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Problems solved by technology

The low energy consumption density of eddy current damping itself leads to the low efficiency index of the eddy current damper that directly adopts the axial relative motion method, which is the main reason that hinders the application of eddy current damping in large engineering structures for a long time

The invention patent application with the publication number CN103821861A has greatly improved the efficiency index of the eddy current damper by using the screw transmission method, but the rotating disc structure in it is difficult to meet the anti-seismic requirement that the speed index is less than 1

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