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Comb tooth sealing structure

A technology of sealing structure and grate teeth is applied in the direction of preventing leakage, jet propulsion device, liquid fuel engine, etc., which can solve the problem of large leakage of the grate structure seal and achieve the effect of reducing the leakage amount.

Inactive Publication Date: 2015-09-09
AECC SHENYANG ENGINE RES INST
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  • Abstract
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Problems solved by technology

[0003] The purpose of the present invention is to provide a grate tooth sealing structure to solve the problem of large leakage of the current grate tooth structure seal

Method used

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  • Comb tooth sealing structure
  • Comb tooth sealing structure
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Embodiment Construction

[0019] Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated.

[0020] Such as Figure 1 to Figure 3 As shown, the grate tooth sealing structure of the present invention includes a matching grate tooth 1 and a bushing 2 . Among them, the grate tooth 1 and the bushing 2 can adopt various known suitable structures and corresponding connection relationships.

[0021] The grate tooth sealing structure of the present invention also includes a sealing ring 3 . The sealing ring 3 is ring-shaped and made of elastic material, such as rubber or stainless steel. The sealing ring 3 is arranged in the tooth cavity of the grate tooth 1, wherein the axis of the sealing ring 3 coincides with the axis of the tooth cavity of the grate tooth 1 . ...

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Abstract

The invention relates to a sealing structure design technology, in particular to a comb tooth sealing structure, and solves the problem of high sealing leakage amount of a traditional comb tooth structure. The comb tooth sealing structure comprises a comb tooth and a bushing matched with each other, and a sealing ring arranged in a tooth cavity of the comb tooth and made of an elastic material; the sealing ring 3 can stop an airflow ejected from a tooth top gap to consume the speed of the airflow in the axial direction, so that the kinetic energy of the airflow cannot be totally transferred to the next tooth top gap, that is, the jet effect of the leaking airflow is eliminated; and the jet effect is a main factor of sealing leakage of the comb tooth, so that the leaking amount of the comb tooth sealing structure can be reduced.

Description

technical field [0001] The invention relates to sealing structure design technology, in particular to a grate tooth sealing structure. Background technique [0002] Grate seal is a common sealing device, which uses the sudden expansion and contraction of the flow channel to consume the kinetic energy of the fluid and increase the flow resistance to limit or prevent fluid leakage. It is mainly used for gas sealing in air systems of military and civil aviation engines and gas turbine engines, such as: high-pressure compressor outlet, bearing cavity sealing, and air sealing between compressor stages and turbine stages. Due to its simple structure, Reliable performance and other characteristics make it still widely used in active and under research aero engines. However, compared with the brush seal and other sealing structures, the original grate tooth structure seal has a large amount of leakage, which leads to a large loss of engine efficiency and high fuel consumption. Co...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/00F02C7/28F04D29/08
Inventor 梁义强柴军生陆海鹰吴凌虹
Owner AECC SHENYANG ENGINE RES INST
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