Contact finger sealing structure

A sealing structure and touch finger technology, applied in the field of aero-engines, can solve problems such as active intervention and control of performance that cannot be sealed, and achieve the effects of reducing load, reducing leakage of sealing gas, and improving sealing performance

Pending Publication Date: 2022-08-05
AECC SICHUAN GAS TURBINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current fingertip seal structure starts from the overall structure, and improves the performance of the fingertip seal by adjusting the shape of the fingertip beam, the shape of the fingertip sheet, and the structure of the rear baffle, all of which are passive adaptive. Sealing structure, unable to actively intervene and control the performance of the seal

Method used

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Embodiment Construction

[0027] The present invention will be described in further detail below in conjunction with the accompanying drawings and examples, but it should be noted that these embodiments do not limit the present invention. Effective transformations or substitutions fall within the protection scope of the present invention.

[0028] In the description of the embodiments of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "upper", "lower", "front", "rear", "left" and "right" , "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the convenience of describing this The invention creates and simplifies the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and...

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PUM

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Abstract

The invention provides a contact finger sealing structure which comprises a sealing assembly, a sealing pair, a pressing assembly and an outer supporting ring, the sealing assembly is of a cylindrical structure, a plurality of spirally-arranged gaps are formed in the cylindrical surface, and a sealing finger body is arranged between every two adjacent gaps. According to the contact finger sealing structure, the sealing structure and the supporting structure are ingeniously integrated while the sealing gas leakage amount is reduced, the frictional wear between the sealing shoe and the end face is reduced and the sealing high-temperature-resistant performance is improved, and the attaching performance between the sealing shoe and the end face is enhanced through the flexibility and elasticity of the curved beam. The effect of blowing away high-temperature air or fuel gas is achieved through slight leakage of sealing, part ablation is avoided, meanwhile, the influence of structural stress and high-temperature creep on performance attenuation is reduced, the sealing reliability during long-time use and repeated decomposition and reassembly is guaranteed, a metal sealing ring usually used for a high-temperature cartridge receiver matching face is replaced, and the sealing performance of a high-temperature cartridge receiver is improved. And the overall reliability of the structure is greatly enhanced.

Description

technical field [0001] The invention belongs to the technical field of aero-engines, and particularly relates to a contact finger sealing structure. Background technique [0002] With the increasing performance of aero-engines, the increase in thermal cycle parameters and the decrease in structural rigidity make the working conditions of the sealing structure in the engine worse and worse. It is imperative to improve the performance of the sealing structure. Under the working conditions, the traditional grate seal can no longer meet the needs of the engine. Therefore, in the past 20 years, there has been a trend of replacing grate seals with flexible seals. As a new type of flexible sealing technology, fingertip seals have been favored by domestic and foreign seals due to their excellent sealing performance and low manufacturing costs. Researcher's extensive attention and in-depth research. [0003] Fingertip seals generally use the structure of "pressure-balanced fingerti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/32F16J15/3252F16J15/3268F16J15/3284F16J15/16
CPCF16J15/32F16J15/3252F16J15/3268F16J15/3284F16J15/16Y02T50/60
Inventor 胡海涛王永明常城程瑶刘颖贺耀王平
Owner AECC SICHUAN GAS TURBINE RES INST
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