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Flexible sealing device

A technology of flexible sealing and sealing seat, which is applied in machine/engine, leakage prevention, mechanical equipment, etc., can solve the problems of wear, low pressure bearing capacity, large leakage, etc., and achieve low leakage rate, low cost of use, and sealing performance. high effect

Pending Publication Date: 2021-04-13
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a flexible sealing device combining grate seal, fingertip seal and brush seal to solve the problems of low pressure bearing capacity, large leakage and serious wear of the existing sealing structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: as Figure 1-11As shown, a flexible sealing device includes an upper seal seat 1, a lower seal seat 2, a grate seal 3, a front baffle 4, a fingertip seal 5, a partition 6, a brush wire 7, a rear baffle 8, The flexible support 9; the upper seal seat 1 and the lower seal seat 2 are provided with placement grooves I29, and the grate tooth seal 3 is fitted with a flexible support member 9 installed in the placement groove I29 of the lower seal seat 2. Multiple fingertips The sealing sheet 5 is clamped and installed in the middle of the front baffle 4 and the partition 6, the front baffle 4 fits the upper part of the grate seal 3 and the flexible support 9, the front baffle 4, the fingertip sealing sheet 5, and the partition 6 are all Installed in the placement groove Ⅰ29 of the lower seal seat 2, the brush filament 7 is fixedly installed in the rear baffle 8, one side of the rear baffle 8 fits the partition 6 and installed in the placement groove Ⅰ29 of the lo...

Embodiment 2

[0035] Embodiment 2: as Figure 1-11 As shown, a flexible sealing device includes an upper seal seat 1, a lower seal seat 2, a grate seal 3, a front baffle 4, a fingertip seal 5, a partition 6, a brush wire 7, a rear baffle 8, The flexible support 9; the upper seal seat 1 and the lower seal seat 2 are provided with placement grooves I29, and the grate tooth seal 3 is fitted with a flexible support member 9 installed in the placement groove I29 of the lower seal seat 2. Multiple fingertips The sealing sheet 5 is clamped and installed in the middle of the front baffle 4 and the partition 6, the front baffle 4 fits the upper part of the grate seal 3 and the flexible support 9, the front baffle 4, the fingertip sealing sheet 5, and the partition 6 are all Installed in the placement groove Ⅰ29 of the lower seal seat 2, the brush filament 7 is fixedly installed in the rear baffle 8, one side of the rear baffle 8 fits the partition 6 and installed in the placement groove Ⅰ29 of the l...

Embodiment 3

[0039] Embodiment 3: as Figure 1-11 As shown, a flexible sealing device includes an upper seal seat 1, a lower seal seat 2, a grate seal 3, a front baffle 4, a fingertip seal 5, a partition 6, a brush wire 7, a rear baffle 8, The flexible support 9; the upper seal seat 1 and the lower seal seat 2 are provided with placement grooves I29, and the grate tooth seal 3 is fitted with a flexible support member 9 installed in the placement groove I29 of the lower seal seat 2. Multiple fingertips The sealing sheet 5 is clamped and installed in the middle of the front baffle 4 and the partition 6, the front baffle 4 fits the upper part of the grate seal 3 and the flexible support 9, the front baffle 4, the fingertip sealing sheet 5, and the partition 6 are all Installed in the placement groove Ⅰ29 of the lower seal seat 2, the brush filament 7 is fixedly installed in the rear baffle 8, one side of the rear baffle 8 fits the partition 6 and installed in the placement groove Ⅰ29 of the l...

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Abstract

The invention relates to a flexible sealing device, and belongs to the technical field of mechanical dynamic sealing. The flexible sealing device comprises an upper sealing base, a lower sealing base, a labyrinth sealing piece, a front baffle, fingertip sealing pieces, a partition plate, brush wires, a rear baffle and a flexible supporting piece, the flexible supporting piece is attached to the labyrinth sealing piece and the labyrinth sealing piece is installed in the lower sealing base, the plurality of fingertip sealing pieces are clamped and installed between the front baffle and the partition plate, the front baffle is attached to the upper portion of the labyrinth sealing piece and the flexible supporting piece, the brush wires are fixedly installed in the rear baffle, one side of the rear baffle is attached to the partition plate and installed in the lower sealing base, the upper sealing base is fixedly installed on the lower sealing base, and the other side of the rear baffle is attached to the inner wall of the upper sealing base and the inner wall of the lower sealing base. According to the flexible sealing device, flexible sealing is adopted to adapt to displacement excitation of a rotor shaft; multi-stage sealing is achieved, the sealing performance is high, stability is high, the structure is simple, and the machining cost of the sealing device can be reduced; and the hysteresis effect of the sealing device can be reduced, the service life is long, the leakage rate is low, and the sealing working efficiency is high.

Description

technical field [0001] The invention relates to a flexible sealing device, in particular to a flexible sealing device for an aero-engine, and belongs to the technical field of mechanical dynamic sealing. Background technique [0002] With the rapid development of the aerospace industry, people pay more and more attention to the performance of the engine. Sealing technology and sealing performance are important factors affecting the performance of the engine. Advanced sealing technology can greatly improve the performance of the engine, reduce the fuel consumption rate and the cost of movement and maintenance. The sealing types of aero-engines mainly include grate seals, brush seals, and fingertip seals. In order to adapt to the centrifugal or thermal expansion of the rotor, the grate seal must maintain a sufficient gap between it and the rotor during use. Such a non-contact sealing structure has a large amount of leakage. In order to reduce the amount of leakage, a small ga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/00F01D11/02
CPCF01D11/003F01D11/02
Inventor 王娟刘美红祝世兴孙军锋李遇贤魏戬宋晓磊雷俊杰
Owner KUNMING UNIV OF SCI & TECH
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