Method for rapidly repairing spacecraft valve sealing structure

Abstract

The invention discloses a method for rapidly repairing a spacecraft valve sealing structure. Aiming at the problem that a baffle and a plastic sealing piece cannot be replaced once a valve seat is ineffectively sealed and generates inner leakage after welding in the process of manufacturing a valve product for a spacecraft, the repairing method can be adopted, a plastic sealing surface of the valve is deformed so as to make up for the defects of scratches and the like caused by leftovers under the actions of temperature and stress on the premise of not influencing valve or engine products, and an inner leakage rate level of the product recovers to a required design index. The method is easy to operate, reworking or repairing is not required, and the problem that an inner leakage rate of the valve product exceeds the standard can be solved, so that the yield of the product is greatly improved, and the rejection loss of the product is reduced.

Description

technical field [0001] The invention relates to a quick repair method for the sealing structure of an aerospace valve, belonging to the technical field of aerospace propulsion valves. Background technique [0002] Spacecraft propulsion valves have very high requirements for cleanliness, and it is necessary to prevent contamination of the sealing surface of the product by excess substances. If there is excess material on the sealing surface, or if the excess material scratches the sealing surface, a leakage channel will be formed, causing the internal leakage of the valve to exceed the standard. Most of the valve products are single-point products in the spacecraft. Once the seal fails, it will have a very serious impact on the spacecraft and even lead to mission failure. [0003] The sealing of aerospace valves is generally a contact seal, which is achieved by a certain sealing specific pressure generated by the tight fit of the sealing surface. When the sealing surface is...

AI Technical Summary

Problems solved by technology

It is very difficult to prevent and control excess in the whole process. During the development process, it is inevitable that some products will have internal leakage failures caused by excess contamination. The possibility of internal leakage failures in all development processes is very high.

At the same time, the cost of aerospace products is very high, and the price of each valve is very expensive. Especially if the valve leaks and is scrapped after the engine is assembled, the entire engine will also be scrapped, which will bring huge economic losses. loss

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