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Manufacturing process of sealing structure of four-seal aviation oil valve

A technology of sealing structure and manufacturing process, which is applied in the direction of valve devices, cocks including cutting devices, engine components, etc., can solve problems such as leakage, and achieve the effects of avoiding corrosion, ensuring reliability, good bonding performance and high temperature resistance

Active Publication Date: 2014-08-27
浙江福瑞科流控机械有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the aging phenomenon of the rubber and the chemical reaction with some liquid components in the oil circuit, the valve disc should be replaced frequently during use, and even leakage may occur if it is not careful.

Method used

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  • Manufacturing process of sealing structure of four-seal aviation oil valve
  • Manufacturing process of sealing structure of four-seal aviation oil valve
  • Manufacturing process of sealing structure of four-seal aviation oil valve

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Put the PTFE sealing ring 15 of the sealing structure of the four-sealed aviation fuel valve into the low-temperature plasma reactor, use 99.999% Ar plasma gas, use external electrodes, and 13.56MHz RF power generator to perform flow-type radio frequency discharge, discharge Gas pressure 40Pa, discharge power 50W, discharge time 5min;

[0027] 2) Place the treated PTFE sealing ring 15 in the air for 5 minutes;

[0028] 3) Soak the trapezoidal groove 16 of the disc 8 in 0.5% APS toluene solution for 10 hours at a temperature of 50°C, and then clean it with ethanol super-sound;

[0029] 4) Dry the treated disc 8 at 100°C for 5 minutes;

[0030] 5) Introduce JF205-1 epoxy adhesive between the PTFE sealing ring 15 and the trapezoidal groove 16, and use a curing process at 60°C for 3 hours to bond the two.

Embodiment 2

[0032] 1) Put the PTFE sealing ring 15 of the sealing structure of the four-sealed aviation fuel valve into the low-temperature plasma reactor, use 99.999% Ar plasma gas, use external electrodes, and 13.56MHz RF power generator to perform flow-type radio frequency discharge, discharge Gas pressure 50Pa, discharge power 100W, discharge time 10min;

[0033] 2) Place the treated PTFE sealing ring 15 in the air for 10 minutes;

[0034] 3) Soak the trapezoidal groove 16 of the disc 8 in a toluene solution of 0.5% APS for 12 hours at a temperature of 60°C, and then clean it with ethanol super-sound;

[0035] 4) Dry the treated disc 8 at 120°C for 10 minutes;

[0036] 5) Introduce JF205-1 epoxy adhesive between the PTFE sealing ring 15 and the trapezoidal groove 16, and use a curing process at 60°C for 3 hours to bond the two.

Embodiment 3

[0038] 1) Put the PTFE sealing ring 15 of the sealing structure of the four-sealed aviation fuel valve into the low-temperature plasma reactor, use 99.999% Ar plasma gas, use external electrodes, and 13.56MHz RF power generator to perform flow-type radio frequency discharge, discharge Gas pressure 45Pa, discharge power 75W, discharge time 7min;

[0039] 2) Place the treated PTFE sealing ring 15 in the air for 7min;

[0040] 3) Soak the trapezoidal groove 16 of the disc 8 in 0.5% APS toluene solution for 11 hours at a temperature of 55°C, and then clean it with ethanol super-sound;

[0041] 4) Dry the treated disc 8 at 110°C for 7 minutes;

[0042] 5) Introduce JF205-1 epoxy adhesive between the PTFE sealing ring 15 and the trapezoidal groove 16, and use a curing process at 60°C for 3 hours to bond the two.

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Abstract

The invention discloses a manufacturing process of a sealing structure of a four-seal aviation oil valve. The process includes the steps of firstly, placing a PTFE seal ring into a low-temperature plasma reactor, and using Ar plasma gas, an external electrode and a radio frequency power generator to perform flow type radio frequency discharge; secondly, placing the processed PTFE seal ring in the air; thirdly, soaking the trapezoid groove of a valve flap in methylbenzene solution, and then performing ultra-strong sound washing with ethanol; fourthly, drying the processed valve flap; fifthly, placing epoxy binder between the PTFE seal ring and the trapezoid groove so as to bind the two. The manufacturing process has the advantages that four seal is achieved while soft seal reliability is guaranteed; the PTFE seal ring is good in corrosion and high temperature resistance, liquid in an oil way is prevented from corroding the seal ring, and abrasion of the seal ring due to frequent opening and closing of a valve is avoided; low-temperature plasma processing is combined with the epoxy binder, and the binding strength of the PTFE seal ring and the valve body is increased.

Description

technical field [0001] The invention relates to a manufacturing process of a sealing structure of a four-seal aviation fuel valve, in particular aimed at cutting off liquids in highly corrosive oil storage and transportation systems. Background technique [0002] The aviation fuel valve is a cut-off valve commonly used in the oil storage and transportation system in recent years. It is installed in the oil storage and transportation system. It uses double discs to achieve bidirectional sealing, and uses a combination of hard seal and soft seal to achieve high reliability. of the seal. If the valve leaks, not only will the valve cavity be filled with liquid, but also the liquid will leak out of the pipeline. Therefore, the sealing requirements of the valve are extremely high, and once the gas leaks, the valve will fail. [0003] The O-ring of the existing aviation fuel valve soft seal is generally formed by rubber vulcanization. This method has a high bonding strength, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/02F16K5/16
CPCF16K5/0207F16K5/0278
Inventor 李国华李福邦高飞李泽玉邵一忠郑建军
Owner 浙江福瑞科流控机械有限公司