A sealing structure of fish mouth between rotor and stator of gas turbine

Abstract

The invention provides a fish mouth sealing structure between a turbine rotor and stator of a gas turbine. The fish mouth sealing structure is formed by a turbine guider inner ring outlet mounting edge, a turbine rotor inner ring front edge wall face and an auxiliary fish mouth sealing conic barrel in a cooperation manner. The turbine guider inner ring outlet mounting edge is a simple annular flatplate, and bosses are circumferentially and evenly distributed on one side of the turbine guider inner ring outlet mounting edge. A vertical ring plate and a horizontal ring plate are arranged on themaximum radius portion of the auxiliary fish mouth sealing conic barrel, grooves are formed in the vertical ring plate to cooperate with the bosses of the turbine guider inner ring outlet mounting edge, a turbine guider is prevented from rotating circumferentially, and the minimum radius portion of the auxiliary fish mouth sealing conic barrel is fixed to a static component through a bolt. High-pressure sealing air flows out to a main channel through the fish mouth sealing structure, and high-temperature gas is prevented from intruding inside. By means of the sealing structure, the sealing effect between the high-pressure turbine rotor and guider is improved, the processing difficulty of the sealing structure is reduced, heat stress of an inner ring rear mounting edge of the high-pressureturbine guider is also reduced, and therefore the performance and competitive power of an engine are improved.

Description

technical field [0001] The invention relates to the field of high-temperature components of gas turbines, and relates to a sealing structure, more specifically, to a new type of fish mouth sealing structure between a turbine guide and a turbine rotor. By changing the sealing structure, the sealing structure can be used more effectively. Tight airflow, so as to achieve higher sealing effect and less sealing flow, improve the overall performance of the engine. Background technique [0002] There is a gap between the rotation and static of the high-pressure turbine. In order to prevent the mainstream gas from flowing backward, a sealing structure is usually designed at the gap. Gas backflow will cause serious harm, resulting in poor heat transfer of the turbine disk, uncoordinated expansion of the rotor and stator, reducing the overall efficiency of the engine, and even causing serious accidents. There are many types of sealing structures, among which the fish mouth sealing st...

AI Technical Summary

Problems solved by technology

However, the structure of the existing fish mouth seal is complicated, and the integrated processing increases the difficulty of the process. The fish mouth seal structure formed by bolt fastening will increase the thermal stress

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