Flexible sealing structure of rotary air pre-heater

Abstract

The invention discloses a flexible sealing structure of a rotary air pre-heater. The flexible sealing structure is a contact type sealing device and comprises a sealing sliding block, a regulation supporting seat and a supporting fixing plate; the sealing sliding block is rotatablely connected with the supporting fixing plate; the supporting fixing plate is relatively arranged on a radial baffle plate of the air pre-heater fixedly; the regulation supporting seat is fixedly connected with the supporting fixing plate; a compression spring is arranged between the regulation supporting seat and the sealing sliding block; the sealing sliding block is in contact with a fan-shaped plate or an axial arc-shaped plate of the air pre-heater; a reset regulation device is arranged between the sealing sliding block and the regulation supporting seat; two ends of the reset regulation device are respectively connected with the sealing sliding block and the regulation supporting seat; and the reset regulation device is used for regulating the maximal resilience modulus of the compression spring positioned between the sealing sliding block and the regulation supporting seat. By using the flexible sealing structure, through regulating the reset regulation device, the regulation of sealing acting force between a moving component and a stationary component in the air pre-heater is realized; the wear of a sealing surface is decreased; and the service life of a quick-wear part is prolonged.

Description

technical field [0001] The invention relates to the technical field of thermal power generation equipment, in particular to a flexible sealing structure of a rotary air preheater. Background technique [0002] In the field of power generation equipment, the rotary air preheater is a heat exchange device that heats the hot flue gas discharged from the tail of the combustion boiler in a thermal power plant to heat the temperature of the cold air entering the boiler for combustion. The area heat transfer element, with the continuous rotation of the rotor, alternately performs heat exchange between the heat of the exhausted hot flue gas and the incoming cold air. Compared with the tubular air preheater, the rotary air preheater has the advantages of compact structure, small volume, high heat exchange surface density, light weight of the whole machine, less metal consumption, easy installation and layout, and low temperature corrosion compared with the tubular air preheater. The...

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Problems solved by technology

[0006] In order to solve the technical problem that the sealing effect of the compression spring in the prior art becomes worse and worse after long-term operation, and to realize a long-term stable seal between the moving part and the stationary part in the air preheater, the embodiment of the present invention provides a rotary Type air preheater flexible sealing structure

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