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A high pressure differential brush seal device

A sealing device and differential brush technology, applied in gas turbine installations, jet propulsion devices, machines/engines, etc., can solve the problems of reducing the sealing performance of the brush seal, increasing the leakage of the brush seal, and reducing the life of the brush seal. , to achieve the effect of improving pressure bearing capacity, good elasticity, and good sealing effect

Active Publication Date: 2021-08-17
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, increasing the diameter of the brush wire will increase the friction between the brush wire and the runway, increase the weight of the brush wire, and reduce the life of the brush seal. The design of the gap between the back plate and the brush wire bundle increases the brush seal. Leakage at low differential pressure reduces the sealing performance of the brush seal

Method used

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  • A high pressure differential brush seal device
  • A high pressure differential brush seal device
  • A high pressure differential brush seal device

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Embodiment Construction

[0019] In order to make the objectives, technical solutions and advantages of the implementation of the application clearer, the technical solutions in the implementation modes of the application will be described in more detail below with reference to the drawings in the implementation modes of the application. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of the present application. The embodiments described below by referring to the figures are exemplary and are intended to explain the present application, and should not be construed as limiting the present application. Based on the implementation manners in this application, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the scope of protection of this application. Embodiments of the pr...

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Abstract

The application belongs to the technical field of aero-engine sealing, and relates to a high-pressure-difference-resistant brush-type sealing device, which includes a brush wire. The brush wire includes a fixed end and a friction end. Extend radially from the fixed end along the casing baffle and contact the engine rotor runway, there is a gap between the brush wire and the side wall of the groove; the side wall of the groove on the low pressure side is provided with a back plate elastic ring, and the back plate is elastic The ring is coaxial with the engine rotor, and has a front end and a rear end along the axial direction, the rear end is fixed on the side wall of the groove by a wave spring, the front end extends to contact the brush filament, and the contact end is located at Between the fixed end and the friction end of the brush filament. In this application, the equivalent axial stiffness of the brush wire under high pressure is improved through the elastic ring of the back plate. The effect is better.

Description

technical field [0001] The application belongs to the technical field of aero-engine sealing, and in particular relates to a high-pressure-difference-resistant brush-type sealing device. Background technique [0002] The ring cavity formed by the aero-engine rotor and the casing is divided into a high-pressure cavity and a low-pressure cavity, and the two need to be sealed. Since the rotor rotates relative to the casing, the seal here is a dynamic seal, and a grate seal or brush is generally used. type seal. [0003] The brush seal has good sealing performance, and its leakage is only half or even lower than that of the straight tooth grate seal with the same sealing radius of 5 under the same working conditions. Therefore, in high-performance aeroengines and gas turbines, brush seals are preferred to seal the air flow path or balance axial forces. Due to the large sealing pressure difference in the working condition of high thrust ratio aero-engines, the pressure bearing ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D11/00F01D11/08F02C7/28
CPCF01D11/00F01D11/08F02C7/28
Inventor 张杰一孔令成慕伟马婷胡广阳
Owner AECC SHENYANG ENGINE RES INST
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