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Non-contact fingertip-labyrinth-brush type combined sealer

A labyrinth seal, non-contact technology, applied in the direction of preventing leakage, engine components, machines/engines, etc., can solve the problems of large leakage rate, small leakage rate, low sealing pressure bearing capacity, etc., achieve high pressure difference ability, excellent dynamic sealing performance effect

Active Publication Date: 2015-07-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, labyrinth seals are widely used in turbomachinery, and their sealing pressure bearing capacity is relatively large, but their leakage rate is relatively large; brush seals and non-contact fingertip seals are both flexible seals, which have the advantage of low leakage rates. But its sealing pressure bearing capacity is small

Method used

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  • Non-contact fingertip-labyrinth-brush type combined sealer
  • Non-contact fingertip-labyrinth-brush type combined sealer
  • Non-contact fingertip-labyrinth-brush type combined sealer

Examples

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Embodiment Construction

[0019] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0020] refer to figure 1 , a non-contact fingertip-labyrinth-brush composite seal, including labyrinth teeth 3 in the labyrinth seal area that are connected to the rotor 7, and the high-pressure side of the labyrinth teeth 3 is connected by a brush wire 2 and a composite front baffle 1 The brush-type sealing area composed of labyrinth teeth 3 is connected to the non-contact fingertip sealing area composed of high-pressure fingertip piece 4, low-voltage fingertip piece 5 and rear baffle plate 6. Labyrinth tooth 3 is used as a brush seal The rear baffle in the area is also used as the front baffle in the non-contact fingertip sealing area. The labyrinth teeth 3 are close to the brush filament 2 and there is an axial gap between the high-voltage fingertip sheet 4.

[0021] There is a gap between the brush filament 2, the labyrinth teeth 3, the high-voltage fingertip sh...

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Abstract

The invention discloses a non-contact fingertip-labyrinth-brush type combined sealer. The combined sealer comprises labyrinth teeth, which are connected with a rotor in a matching way, in a labyrinth sealing area, the high pressure sides of the labyrinth teeth are connected with a brush type sealing area consisting of brush wires and a composite front baffle plate, and the low pressure side of the labyrinth teeth is connected with a non-contact fingertip sealing area consisting of a high pressure fingertip piece, a low pressure fingertip piece and a rear baffle; the labyrinth teeth are served as the rear baffle of the brush wire sealing and can be served as the front baffle in the non-contact fingertip sealing area, the pressure can be greatly reduced after the upstream high pressure side pressure passes through the brush type sealing area and the labyrinth sealing area, and the pressure on the non-contact fingertip sealing area can be greatly reduced, and the sealing differential difference resistance can be greatly improved; furthermore, a leak-proof structure is of a non-contact way, the dynamic sealing performance can be improved, and the stability of a rotor-sealing system can be greatly improved.

Description

technical field [0001] The invention belongs to a non-contact sealing device for a rotating shaft, in particular to a non-contact fingertip-labyrinth-brush compound seal. Background technique [0002] In the field of turbomachinery, it is often necessary to seal the fluid between the rotating part and the stationary part. Sealing technology plays an important role in the engine. Through the use of advanced sealing technology, the performance of the engine can be easily improved by 1%-2%. At present, labyrinth seals are widely used in turbomachinery, and their sealing pressure bearing capacity is relatively large, but their leakage rate is relatively large; brush seals and non-contact fingertip seals are both flexible seals, which have the advantage of low leakage rates. But its sealing pressure bearing capacity is small. [0003] If the advantages of strong pressure bearing capability of labyrinth seal, brush seal and low leakage rate of non-contact fingertip seal can be c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/02
Inventor 杜凯冰李永健索双富黄首清王玉明
Owner TSINGHUA UNIV
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