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Engine Sealing Structure

A sealing structure and engine technology, applied in the direction of engine sealing, engine components, mechanical equipment, etc., can solve the problems of test run suspension, test flight engine return factory inspection, etc., and achieve the effect of avoiding false alarms

Active Publication Date: 2020-07-24
AECC SHENYANG ENGINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the use of bearing chambers of aero-engines, in order to reduce the amount of leakage, a small clearance design is often adopted, that is, contact friction will occur under large working conditions, and the grate teeth and coating will wear during the friction process, and the tip of the grate teeth is easy The fine metal wires produced during the contact wear process are blown into the bearing cavity by the high-pressure sealing air, and the metal wires enter the lubricating oil in the bearing cavity. With the circulation of the lubricating oil, the metal chip end signaler will alarm. It is normal for the grate teeth to wear and tear during use, but if the chip signaler alarms, it will directly lead to the suspension of the test run, and even cause the field test engine to return to the factory for inspection

Method used

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Embodiment Construction

[0019] The application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the related application, not to limit the application. In addition, it should be noted that, for ease of description, only parts relevant to the present application are shown in the drawings.

[0020] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and embodiments.

[0021] It should be noted that in the description of this application, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The terms of the indicated direction or positional relationship are based on the direction or positional ...

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Abstract

The invention provides an engine sealing structure. The engine sealing structure comprises a plurality of comb teeth and a sealing bushing. The comb teeth are arranged on the outer side of a rotor, and the sealing bushing sleeves the outer side of the rotor. A first groove is formed in each comb tooth, the included angle between the first grooves in every two adjacent comb teeth in the circumferential direction of the rotor is 360 / n degrees, and the n is the number of the comb teeth. In the using process of the engine sealing structure, a second groove is formed in the lowermost portion of theinner side face of the sealing bushing.

Description

technical field [0001] The present application relates to the technical field of aero-engines, and specifically provides an engine sealing structure. Background technique [0002] The grate tooth seal is an effective and long-life non-contact sealing structure widely used in aero-engines. It has a simple structure and is widely used. It is often used to seal the lubricating oil of the bearing cavity. High pressure air to prevent oil leakage. [0003] The grate tooth seal is generally composed of a stationary sealing bush and a rotating grate tooth, and an abradable coating is designed on the stationary sealing bush. In the use of bearing chambers of aero-engines, in order to reduce the amount of leakage, a small clearance design is often adopted, that is, contact friction will occur under large working conditions, and the grate teeth and coating will wear during the friction process, and the tip of the grate teeth is easy The fine metal wires produced during the contact we...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/16
CPCF16J15/162
Inventor 张立静胡广阳
Owner AECC SHENYANG ENGINE RES INST