Involute-type fingertip sealing structure

A fingertip sealing, linear technology, applied in the direction of engine sealing, leakage prevention, engine components, etc., can solve the problems of poor sealing performance, complex processing, and high production costs, and achieve improved sealing performance and simple processing technology. , the effect of low cost

Inactive Publication Date: 2010-06-23
CHINA GAS TURBINE ESTAB
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the present invention: In order to solve the problems of poor sealing performance, complicated processing and high production cost of the prior art fingertip s

Method used

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  • Involute-type fingertip sealing structure
  • Involute-type fingertip sealing structure
  • Involute-type fingertip sealing structure

Examples

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Example Embodiment

[0021] The present invention will be further described in detail below through specific embodiments:

[0022] See figure 1 , Which is a schematic structural view of a preferred embodiment of the involute type fingertip sealing device of the present invention. The involute type fingertip sealing device is composed of a front baffle 1, a back baffle 2, and six layers of fingertips 3 arranged between the two, and the front baffle 1, the back baffle 2 and the fingertips The tip piece 3 is connected by rivet riveting or welding. Wherein, the front baffle 1 is a ring-shaped plate-shaped structure, whose main function is to support and protect the fingertip sheet 3. This structure is similar to the front liner ring of the hydrostatic fingertip sealing structure, but has a front The function of the backing ring and the front spacer ring. The rear baffle 2 is also a ring-shaped plate structure, whose main function is to support and protect the fingertip sheet 3. This structure is simila...

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Abstract

The invention relates to a sealing structure, in particular to a fingertip sealing structure used for controlling leakage of secondary flow in an engine. The involute-type fingertip sealing device comprises a front baffle plate (1), a back baffle plate (2) and a plurality of layers of fingertip chips (3) which are arranged between the front baffle plate and the back baffle plate; the characteristics are as follows: the internal diameter of the fingertip chip is provided with an involute-type finger body (4), and the free end of the finger body (4) forms a sealing boot (5), and the finger bodies (4) between the two adjacent fingertip chips (3) are mutually staggered. Through the design of the involute-type finger body, and combining the characteristics of the fingertip sealing and the fine-toothed comb sealing, the involute-type fingertip sealing structure provided by the invention has good sealing performance, can effectively decrease leakage. Meanwhile, the invention has simple structure, convenient processing, low cost, and is suitable for batch production, and has large actual application value.

Description

technical field [0001] The invention relates to a sealing structure, in particular to a fingertip sealing structure for controlling secondary flow leakage in a gas turbine engine. Background technique [0002] At present, in gas turbine engines, three types of seals are widely used: grate seals, circumferential seals and end face seals. There are certain defects in each of these three structures: although the grate tooth seal has a simple structure, its sealing performance is relatively poor. The grate tooth seal cannot adapt to the centrifugal or thermal expansion of the rotor, so it is necessary to maintain a sufficient gap between the rotor and the stator during design, which reduces the sealing performance, and the leakage flow contains pollution, and auxiliary mechanisms are required to reduce oil leakage. The pressure resistance and temperature resistance of the circumferential seal are relatively low, and its durability cannot meet the requirements of long life, so i...

Claims

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Application Information

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IPC IPC(8): F01D11/12F16J15/16
Inventor 肖育祥周连杰罗健胡海涛汪凯吴瑕徐鹏飞赵亚飞郭永庆
Owner CHINA GAS TURBINE ESTAB
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