An adjustable magnetic damping anti-vibration brush seal structure

Abstract

The invention discloses an adjustable type magnetic damping flutter suppression brush type sealing structure. The adjustable type magnetic damping flutter suppression brush type sealing structure comprises a front baffle, a brush wire bundle, a rear baffle and a rotor disc which are sequentially arranged in the axial direction of a rotor, wherein the front baffle and the rear baffle are connectedthrough a fusion welding region, the root of the brush wire bundle is fixed to the fusion welding region, and the end of the brush wire bundle is attached to the rotor; the rear baffle comprises a fixed base connected with the fusion welding region, and a permanent magnet baffle hinged to the fixed base, the opposite sides of the rotor disc and the permanent magnet baffle are connected with a permanent magnet matching plate with the same polarity as the permanent magnet baffle through an adjusting screw and fixing screws which are fixed to the rotor disc, and the permanent magnet baffle and the permanent magnet matching plate are each formed by arraying a plurality of neodymium iron boron permanent magnets in the circumferential direction of the rotor. The adjustable type magnetic dampingflutter suppression brush type sealing structure can suppress a flutter of brush wires and the stiffening effect and the hysteresis effect caused by friction force between the brush wires and the rearbaffle, relieves abrasion to the brush wires and the surface of the rotor, suppresses the flutter, improves sealing performance, and is prolonged in service life.

Description

technical field [0001] The invention relates to a dynamic sealing structure applied to a rotating machine, in particular to an adjustable magnetic damping anti-vibration brush type sealing structure. Background technique [0002] Brush seals are key components of rotating machinery such as aero-engines, steam turbines, and compressors. Compared with the traditional labyrinth seal, the brush seal not only has better sealing characteristics, but also is a flexible contact dynamic sealing technology, which can adapt to the instantaneous radial deformation or eccentric movement of the rotor. In addition, the brush wire of the brush seal The flexible contact with the rotor shaft can improve the vibration characteristics of the rotor system and ensure the safety of the unit operation. Therefore, brush seals are widely used in rotating machinery in aerospace, electric power, petrochemical and other industries. [0003] The brush seal is composed of the front baffle, the rear baff...

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Problems solved by technology

[0006] In view of this, the object of the present invention is to provide an adjustable magnetic damping anti-vibration brush seal structure to solve the problem of "stiffening effect", "hysteresis effect" and chattering phenomenon easily produced by the existing brush seal structure. and serious wear on the surface of the rotor, short service life and other problems

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