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Fingertip sealing device

A fingertip seal and assembly hole technology, which is applied in the direction of leakage prevention, engine components, machines/engines, etc., can solve the problems of complex processing, poor sealing performance of fingertip seal structure, high production cost, etc., and achieve simple processing technology, Meet the requirements of mass production and low cost

Active Publication Date: 2012-04-18
AECC SICHUAN GAS TURBINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a fingertip sealing device with good sealing performance, long service life and low production cost to solve the problem of poor sealing performance, complicated processing, The problem of high production costs

Method used

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Embodiment Construction

[0012] The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0013] see figure 1 , which is a structural schematic diagram of the first embodiment of the fingertip sealing device of the present invention. The fingertip sealing device is composed of a front baffle 1, a rear baffle 2 and five layers of fingertip sheets 3 arranged between the two, and the front baffle 1, the rear baffle 2 and the fingertip sheets 3 are made of Riveted or welded connection. Wherein, the front baffle 1 is an annular plate-like structure, and its main function is to support and protect the fingertip sheet 3. This structure is similar to the front lining ring of the hydrostatic pressure fingertip seal structure, but has the The function of the backing ring and front spacer. The tailgate 2 is also an annular plate-shaped structure, and its main function is to support and protect the fingertip sheet 3. This struct...

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Abstract

The invention relates to a sealing device, in particular to a fingertip sealing device for controlling secondary flow leakage in a gas turbine engine. The fingertip sealing device consists of a front baffle plate, a rear baffle plate and a plurality of fingertip sheets arranged between the front baffle plate and the rear baffle plate, wherein both the front baffle plate and the rear baffle plate have annular platy structures; downwards sunken finger bodies which are arranged linearly are formed on the inner diameters of the fingertip sheets; the finger bodies between two adjacent layers of fingertip sheets are staggered; a plurality of pairs of assembly holes are formed in the fingertip sheets; and the front baffle plate, the rear baffle plate and the fingertip sheets are connected with one another through rivets in a riveting or welding mode. The fingertip sealing device can adapt to vibration of a shaft, relative displacement, which is produced by a centrifugal force and thermal deformation, between a rotor and the sealing device, and larger axial displacement of the rotor, so that aims of improving the sealing property and reducing leakage are fulfilled, and the service life is prolonged. The fingertip sealing device has the characteristics of being suitable for manufacturing sealing devices in various sizes and meeting requirements for batch production, along with simple structure and low cost.

Description

technical field [0001] The present invention relates to a sealing device, in particular to a fingertip sealing device for controlling secondary flow leakage in a gas turbine engine. Background technique [0002] Currently, grate seals are widely used in gas turbine engines to control secondary flow leakage. Although the grate tooth seal has a simple structure, its sealing performance is 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. Although the brush seal partially solves the problem of poor sealing performance of the grate teeth, the brush seal has a complicated process and high processing cost, and is not suitable for sealing structures with small diameters. [0003] Fingertip seal is a new technology developed in recent years. It is similar to the brush seal structure, and uses a series of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/04
Inventor 胡海涛李贵林周连杰汪凯吴瑕
Owner AECC SICHUAN GAS TURBINE RES INST
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