Online compression amount measurement method for seal ring of small solid rocket

Abstract

An online compression amount measurement method for a seal ring of a small solid rocket includes: analyzing stress conditions of the seal ring; obtaining a relationship between a compression amount of the seal ring and a tightening torque by establishing a relationship between the compression amount of the seal ring and an axial stress and a relationship between the axial stress and tightening torque; further providing a technical test method for identifying a tightening torque coefficient according to a direct proportion relationship between the compression amount and the tightening torque; during technical test, writing reference values such as a reference value of the compression amount of the seal ring, a reference value of the tightening torque and the like besides the tightening torque coefficient into a database to provide a basis for judgment in online measurement; in a practical tightening process, calculating the compression amount of the seal ring by measurement of an angle and an output torque of a torque tightening motor, and writing data including a measured value of the compression amount of the seal ring, a measured value of the tightening torque and the like into the database for inquiring. By the online compression amount measurement method, real-time precision compression amount measurement of the seal ring of the small solid rocket can be realized.

Description

technical field [0001] The invention belongs to the field of pyrotechnic device assembly and relates to a method for measuring the compression amount of a sealing ring used in a pyrotechnic device. Background technique [0002] The small solid rocket is a typical aerospace pyrotechnic device, which plays an important role in the separation of forward (reverse) propulsion, fairing separation, star rocket spin-up, barrel cover side thrust, warhead attitude adjustment and control, etc. [0003] In previous ground tests, a mass accident of rocket disintegration occurred due to the leakage of high-temperature and high-pressure gas of a small solid rocket. Afterwards, the fault analysis found that the reason was that the compression of the sealing ring was not in place (generally, the compression amount was 10% to 30% of its thickness). Failure to make a reliable seal between the housing and the nozzle. According to the quality control requirements of aerospace products, the key ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is: aiming at the problem that the compression amount of the solid small rocket sealing ring needs two assemblies, multiple measurements, and low efficiency, an online measurement method for the compression amount of the solid small rocket sealing ring is proposed, which can not only improve the The test efficiency of the compression amount of the sealing ring, and the relative error of the measurement can meet the engineering precision requirements

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