Brush type sealing structure allowing rotor to reverse

Abstract

The invention discloses a brush type sealing structure allowing a rotor to reverse. The brush type sealing structure comprises a stator, a brush type sealing part, pawls, spiral springs and the rotor,wherein the stator is annular, the inner circumference of the stator is sawtooth, and the brush type sealing part is arranged in the stator in a clearance fit manner; the brush type sealing part comprises a front baffle, a connecting area, a rear baffle and a brush wire strand, the front baffle, the connecting area, the rear baffle and the brush wire strand are integrally connected, the brush wire strand is clamped between the front baffle and the rear baffle, one end of the brush wire strand is fixedly connected with the connecting area, and the other end of the brush wire strand is obliquely arranged in the rotation direction of the rotor; arc grooves are uniformly formed in the periphery of the connecting area, one ends of the pawls are arranged in the arc grooves through pawl shafts,and the other ends of the pawls are inserted into tooth grooves of the inner circumference of the stator in coordination manner; and the spiral springs are arranged between the pawls and the brush type sealing part in a compression manner. In the case of rotor reversal, the brush type sealing structure can still guarantee that the brush wire strand is in a perfect condition, the service life of brush wires is prolonged, and the use cost of the brush wires is reduced.

Description

technical field [0001] The invention relates to a sealing structure applied in a rotary machine, and in particular provides a brush type sealing structure allowing the rotor to reverse. 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 can adapt to the instantaneous radial deformation or eccentric movement of the rotor. In addition, the brush wire of the brush seal forms a flexible contact with the rotor, which can improve the rotor system. The vibration characteristics ensure the safety of unit operation, so brush seals are widely used in rotating machinery in aerospace, electric power, petrochemical and other industries. [0003] The brush seal is composed of a front panel, a rear panel and a brush bundle composed of highly dense alloy fine metal wires sandwiched between t...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the purpose of the present invention is to provide a brush seal structure that allows the rotor to reverse, so as to solve the problem that the existing brush seal structure will cause damage to the brush filaments when the rotor is reversed

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