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Fingertip sealing device with core hollow fingertip sheet

A fingertip sealing and core technology, applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve problems such as performance intervention and control that cannot be sealed, so as to improve cooling effect, sealing performance, and pressure bearing capacity. Effect

Active Publication Date: 2020-01-14
AECC SICHUAN GAS TURBINE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The current fingertip sealing devices start from the overall structure, and improve the performance of fingertip sealing by adjusting the shape of the fingertip beam, the shape of the fingertip sheet, and the structure of the rear baffle. These are all passive adaptive sealing structures. , cannot actively intervene and control the performance of the seal

Method used

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  • Fingertip sealing device with core hollow fingertip sheet
  • Fingertip sealing device with core hollow fingertip sheet
  • Fingertip sealing device with core hollow fingertip sheet

Examples

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Embodiment Construction

[0025] The present invention will be described in further detail below by means of specific embodiments:

[0026] see figure 1 , which is a structural schematic diagram of a fingertip sealing device with a core hollow fingertip sheet applied to secondary flow path sealing according to the present invention. The fingertip sealing device with a core hollow fingertip piece is composed of a front baffle 1 , a rear baffle 2 , a core hollow fingertip piece 3 and bolts 9 . The front baffle 1 is an annular plate-shaped structure, and its main function is to support and protect the core hollow fingertip sheet 3 . The tailgate 2 is also a ring-shaped plate structure, and its main function is to support and protect the core hollow fingertip sheet 3. There is a pressure equalizing groove on the surface in contact with the fingertip sheet to reduce the axial force on the fingertip sheet. to the load. The core hollow fingertip sheet 3 is a stack of metal or composite material sheets proc...

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PUM

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Abstract

The invention belongs to the field of aircraft engine design, and relates to a gas sealing device for an engine main flow path and a secondary flow path. The finger seal device is composed of a frontbaffle (1), a rear baffle (2) and the core hollowed-out finger piece (3). A gap is formed in the core hollowed-out finger piece (3) from the inner diameter, a finger body (7) and a seal shoe (8) are arranged in the gap, and the core of the finger body (7) and the core of the seal shoe (8) are hollowed out. Frictional wear between the seal shoe and a rotator is reduced, the high temperature resistance performance of finger seal is improved, and besides, the optimal performance of conventional finger seal is basically maintained.

Description

technical field [0001] The invention belongs to the field of aero-engine design, and relates to a gas sealing device for a main flow path and a secondary flow path of an engine. Background technique [0002] With the increasing performance of aero-engines, the increase in thermal cycle parameters and the decrease in structural rigidity have made the working conditions of the sealing devices in the engines more and more severe. It is imperative to improve the performance of the sealing devices. The use of traditional grate seals under working conditions has been unable to meet the needs of the engine. Therefore, in the past 20 years, there has been a trend of replacing grate seals with flexible seals. Fingertip seals, as a new type of flexible sealing technology, have been recognized by domestic and foreign sealants for their excellent sealing performance and low manufacturing cost. extensive attention and in-depth research by researchers. [0003] The design work of the fi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16J15/16
CPCF16J15/16F16J15/162
Inventor 胡海涛常城刘颖
Owner AECC SICHUAN GAS TURBINE RES INST
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