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Rubber fabric clamped film sheet and manufacturing method thereof

A technology of rubber cloth and manufacturing method, applied in the field of pressure reducing valve, can solve the problems of restricting the delivery schedule of products, difficult to separate diaphragms, low qualified rate of diaphragms, etc. high effect

Active Publication Date: 2014-04-30
NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problems exist in the production process of the diaphragm, resulting in a low pass rate of the diaphragm
After the vulcanization process, there are spots and patterns on the surface of the diaphragm, resulting in scrapping; in production, the diaphragm is difficult to separate after the grinding process, and the problem of bulges and rubber layer fractures on the diaphragm surface occurs after the forced peeling. The number of times is not many, but the amount of scrap is large each time; the diaphragm with a normal surface has mottling and pattern after the grinding process, or the diaphragm with light mottling and pattern on the surface is aggravated after the grinding process
These problems have seriously restricted the delivery schedule of products

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Rubber fabric clamped film sheet and manufacturing method thereof
  • Rubber fabric clamped film sheet and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1] Soak the reinforced fabric in peroxysilane, take it out after 2 hours and let it dry naturally.

[0038] 2] The diaphragm is molded and vulcanized, and the stacking sequence of rubber, reinforced fabric and metal skeleton is as follows: figure 2 , The vulcanization temperature is 151±2°C, the vulcanization pressure is 20-50kN, and the vulcanization time is 40min. After opening the mold, store the diaphragm at an ambient temperature of 0-15°C.

[0039] 3] Coat the surface of 13 diaphragms with grease and stack them together, clamp and fix the outer circle, and use a high-precision grinder to grind the inner hole, the size reaches Then clamp and fix the inner hole of the diaphragm, grind the outer circle, and the size reaches During the grinding process, spray alcohol to the diaphragm to cool down.

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Abstract

The invention relates to a rubber fabric clamped film sheet and a manufacturing method thereof. The rubber fabric clamped film sheet comprises a rubber material film sheet body which is provided with a central hole, wherein the film sheet body is internally provided with a reinforced fabric interlayer and a disc-shaped metal framework; the shape of the reinforced fabric interlayer is consistent with that of the film sheet body; the diameter of the outer circle of the metal framework is greater than the diameter of the central hole but smaller than the diameter of the outer circle of the film sheet body. The rubber fabric clamped film sheet, disclosed by the invention, solves the problem of mottled surface of the film sheet, the problem that the film sheet after being ground is difficult to separate and the problem that surface bulge and rubber layer fracture of the film sheet are resulted after the film sheet is peeled off forcibly. The rubber fabric clamped film sheet, disclosed by the invention, has the advantages of high pressure resistance, good leak tightness, high stability of pressure adjustment as well as good high-temperature and low-temperature pressure adjustment characteristics, and is particularly suitable for reducing valves of liquid-propellant rocket engines with high requirements on performance and relatively high leak tightness as well as adjustability.

Description

technical field [0001] The invention relates to a rubber cloth diaphragm and a manufacturing method thereof, in particular to a pressure reducing valve of a liquid rocket engine for regulating and stabilizing system gas pressure. Background technique [0002] In the liquid rocket engine, the pressure reducing valve plays the role of regulating and stabilizing the gas pressure of the system, and the rubber cloth diaphragm (hereinafter referred to as the diaphragm) is the sensitive element in the pressure reducing valve, which plays an important role in realizing the function of the pressure reducing valve and ensuring the pressure accuracy. play an important role. The pressure reducing valve diaphragm has high technical requirements, including: high pressure resistance, good sealing performance, high stability for pressure regulation, and good high and low temperature pressure regulation characteristics. Therefore, the surface quality, size and shape and position tolerance r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K31/126B29C35/02C08L9/02C08K13/02C08K3/04C08K5/12C08K5/11C08K3/22D06M13/513
Inventor 薛晓军胡武利马海瑞刘新良姜潮金冰
Owner NO 11 INST OF NO 6 ACADEMY OF CHINA AEROSPACE SCI & TECH
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