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Cavity dynamic sealing structure

A dynamic sealing structure and cavity technology, applied in the direction of machines/engines, jet propulsion devices, layered products, etc., can solve the problems of inability to meet the needs of use, poor radial followability, etc., to improve the sealing performance and overall connectivity, The effect of uniform force and reduction of seal leakage

Pending Publication Date: 2021-04-20
BEIJING XINGJI RONGYAO SPACE TECH CO LTD +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor radial followability of the sealing member of the continuous cavity with irregular shape in the prior art, which cannot meet the needs of use, thereby providing a good radial followability, sealing The leakage is small, and the dynamic sealing structure of the cavity meets the needs of use

Method used

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  • Cavity dynamic sealing structure
  • Cavity dynamic sealing structure
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Examples

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Embodiment approach

[0038] Such as figure 1 , 2 , 3 and 7 shows the first specific implementation of the cavity dynamic sealing structure, the dynamic sealing structure 5 is set in the sealing cavity 4 formed by the spherical shell 1, the fixed shell 2 and the baffle plate 3, the spherical shell 1 During the working process, it swings back and forth (swing angle ≤ 20° / s), and the medium in the inner cavity of the spherical shell 1 is high temperature and high pressure (temperature ≤ 1000K, pressure ≤ 1MPa) gas; the fixed shell 2 and the baffle 3 are fixedly connected, and they are still when working ; The spherical shell 1 cooperates with the fixed shell 2 and the baffle plate 3 in a radial clearance to form a sealed cavity 4, and the dynamic sealing structure 5 is arranged in the sealed cavity 4, relatively fixed with the fixed shell 2 and the baffle plate 3, and The spherical shell 1, the fixed shell 2 and the baffle plate 3 are in elastic contact state. When the dynamic sealing structure 5 i...

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Abstract

The invention relates to the technical field of sealing devices, in particular to a cavity dynamic sealing structure. The cavity dynamic sealing structure comprises a first elastic filling part, a first supporting part and a first abrasion-resistant part. The first supporting part is in a hollow pipe shape, and a plurality of grids are formed on the pipe wall of the first supporting part and wrap the periphery of the first elastic filling part. And the first abrasion-resistant part wraps the periphery of the first supporting part. The cavity dynamic sealing structure is good in radial following performance, small in sealing leakage amount and capable of meeting use requirements.

Description

technical field [0001] The invention relates to the technical field of sealing devices, in particular to a cavity dynamic sealing structure. Background technique [0002] For the new generation of fighter jets, under the premise of ensuring the aerodynamic performance of the nozzle in the normal state, the nozzle can achieve a large vector angle deflection function to ensure the working state of the nozzle and engine of the new generation fighter under subsonic, transonic and ultrasonic conditions Matching to meet the engine's wide range of work requirements. Dynamic sealing is the key technology to ensure the reliability and aerodynamic performance of vectoring nozzles used in fighter jets. On the one hand, the vectoring nozzles for the new generation of fighter jets are generally installed behind the afterburner of the engine. Reduce thrust loss caused by nozzle leaks. The sealing system of the nozzle should overcome the thermal load of the temperature on the seal in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K1/80B32B15/00B32B15/02B32B9/00B32B9/04B32B15/04B32B15/14B32B7/12B32B3/08
Inventor 孙轶丛明辉彭小波张玺张峰王玉
Owner BEIJING XINGJI RONGYAO SPACE TECH CO LTD
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