Novel air seal for combustion gas turbine tail barrel and manufacturing method for novel air seal

Abstract

The invention discloses a novel air seal for a combustion gas turbine tail barrel and a manufacturing method for the novel air seal. The air seal comprises a brush and a sealing piece body, wherein the brush comprises a brush wire cluster and two metal strips; the brush wire cluster is arranged between the two metal strips, so as to form a T shape; the sealing piece body is provided with a brush wire matching surface; the brush wire cluster of the brush is fixed on the brush wire matching surface; the metal strips are clung to the side surfaces of the brush wire matching surface; the brush and the sealing piece body are fixed by welding fixing points. According to the novel air seal, high-temperature gas at an outlet part of the combustion gas turbine tail barrel can be effectively sealed, the problem of sealing failure caused by severe factors such as high-temperature fuel gas can be well controlled by reasonably selecting a material and a processing process. The novel air seal comprises the brush and the sealing piece body, and can resist the oxidation and corrosion caused by the high-temperature gas of a combustion gas turbine. According to the novel air seal and the manufacturing method of the novel air seal, the processing is easy, the control is easy to implement, the rate of finished products is high, and the aims of saving energy and reducing the consumption can be realized.

Description

technical field [0001] The invention relates to a novel gas turbine tailpipe air seal and a manufacturing method thereof, belonging to the technical field of sealing equipment. Background technique [0002] During the operation of the gas turbine, high-temperature gas passes through the tailpiece and before entering the turbine vane, a special sealing structure is required to prevent the leakage of high-temperature gas. Oxidation corrosion, and can maintain a good seal between components deformed by thermal stress, relying on the excellent performance of high-performance brush filaments, and the rationality of the sealing structure design, can meet the sealing requirements of the unit. [0003] The tailpiece brush air seal is composed of high temperature resistant body material and brush, which forms a contact seal with the sealing working surface. The sealing layer is composed of dense and elastic brush wire. When the high temperature gas passes through the brush wire, it w...

AI Technical Summary

Problems solved by technology

[0004] The brush-type air seal used in traditional gas turbines is an integral structure, and errors in the intermediate process will lead to the overall scrapping and large losses

[0005] Brush gas seals for gas turbines are vulnerable parts and need to be replaced regularly

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