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Self-lubricating contact type composite sealing device for high-temperature part of gas turbine engine

A gas turbine and composite sealing technology, which is applied in the lubrication of engines, turbines/propulsion devices, engine components, etc., can solve problems such as poor sealing structure effects, achieve stable sealing, improve sealing effects, and increase transmission volume.

Pending Publication Date: 2020-09-01
ZHENGZHOU UNIVERSITY OF AERONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a self-lubricating contact type composite sealing device for the high temperature part of the gas turbine engine, which solves the technical problem of poor sealing structure effect of the high temperature part of the gas turbine engine in the existing aerospace

Method used

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  • Self-lubricating contact type composite sealing device for high-temperature part of gas turbine engine
  • Self-lubricating contact type composite sealing device for high-temperature part of gas turbine engine
  • Self-lubricating contact type composite sealing device for high-temperature part of gas turbine engine

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Effect test

Embodiment 1

[0028] Embodiment 1, a self-lubricating contact type composite sealing device for a high temperature part of a gas turbine engine, such as figure 1 As shown, including the inner sealing ring 1 arranged on the turbine shaft of the gas turbine engine, when the turbine shaft moves, the inner sealing ring 1 will move synchronously with the turbine shaft. Since the turbine shaft is a high-temperature component of the gas turbine engine, the turbine shaft is deformed by heat and recovers when cooled. Both the turbine shaft and the inner sealing ring 1 will undergo reciprocating axial deformation, that is, the inner sealing ring 1 will undergo cyclic expansion and contraction.

[0029] The outer periphery of the sealed inner ring 1 is provided with a compression assembly, and the compression assembly is provided with a fingertip seal ring 4 and an annular graphite lubricant 8, and the inner wall of the fingertip seal ring 4 is slidingly fitted with the outer wall of the sealed inner r...

Embodiment 2

[0036] Embodiment 2, a self-lubricating contact type composite sealing device for a high temperature part of a gas turbine engine, such as Figure 5 and 6 As shown, the graphite lubricating element 8 includes several graphite blocks interlocked with each other, which not only ensures the reliability of the friction between the graphite lubricating element 8 and the fingertip sealing ring 4, but also effectively reduces the air leakage area and improves the sealing effect. Under the action of the elastic support 7, the multi-stage combined graphite lubricating part 8 is automatically attached to the center, the graphite powder is shed by friction, and the graphite powder is transferred to the fingertip seal through the working mode of the sealing inner ring 1 cyclic expansion and contraction. The ring 4 forms a self-lubricating integrated design in the working area of ​​the fingertip sealing ring 4 and the sealing inner ring 1.

[0037] The present invention fully realizes the...

Embodiment 3

[0041] Embodiment 3, a self-lubricating contact type composite sealing device for a high-temperature part of a gas turbine engine, when used for a gas turbine engine with a turbine shaft with an internal bleed air function, such as figure 1 As shown, the side wall of the sealed inner ring 1 is provided with an air-introducing hole 9 leading to the graphite lubricating member 8, which can form an air-tight structure between the graphite lubricating member 8 and the sealed inner ring 1, which is conducive to reducing leakage. The air area is beneficial to increase the amount of friction and shedding of ultra-fine graphite powder, which is conducive to increasing the transfer amount of graphite powder to the contact position between the fingertip seal ring 4 and the inner seal ring 1 at both ends, and can also reduce the graphite lubrication of the multi-stage combination in the free floating state Part 8 interferes with the sealing inner ring 1. When the gas turbine engine is in...

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Abstract

The invention discloses a self-lubricating contact type composite sealing device for a high-temperature part of a gas turbine engine. The technical problem that the sealing structure effect of the high-temperature part of the gas turbine engine in existing aerospace is poor is solved. The self-lubricating contact type composite sealing device comprises a sealing inner ring arranged at the high-temperature part of the gas turbine engine. A pressing assembly is arranged on the periphery of the sealing inner ring. A fingertip sealing ring and a graphite lubricating piece are arranged in the pressing assembly. The inner wall of the fingertip sealing ring is in sliding fit with the outer wall of the sealing inner ring. An elastic supporting piece for pressing the graphite lubricating piece to the outer wall of the sealing inner ring is arranged in the pressing assembly. The self-lubricating contact type composite sealing device is simple in structure, low in cost, long in service life, andhigh in sealing effectiveness and sealing efficiency, the major problem of contact type sealing self-lubricating is solved, and the self-lubricating contact type composite sealing device has importantapplication value in the sealing direction of the hot end part of an aerospace gas turbine engine.

Description

technical field [0001] The invention belongs to the technical field of contact type composite sealing devices, in particular to a self-lubricating contact type composite sealing device at a high temperature part of a gas turbine engine. Background technique [0002] Contact seal is an advanced and efficient sealing method in mechanical seals. It has developed rapidly and has been widely used in military industry, mold, hydraulic pressure, textile machinery and other industries. It is also commonly used in gas turbine engines in the aerospace field. The contact seal achieves the purpose of sealing through the dynamic contact between the sealing ring and the bushing. It has the advantage of reducing the leakage area, has good sealing effect, and has strong applicability to the material and structure of the sealing part. The sealing effect is better than that of non-contact. type seal. [0003] The existing contact seals mainly include expansion ring seals, brush seals, and fi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/00F02C7/06
CPCF01D11/003F02C7/06
Inventor 王毅李庆宇张丽丽王建磊
Owner ZHENGZHOU UNIVERSITY OF AERONAUTICS
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