火箭推进2017，Vol.43Issue(5)：34-38,5.
充气卸荷开关泄漏机理分析
Analysis on leakage mechanism of unloading valve
张连万 1薛立鹏 1马飞 1李文斌 1余武江 1张志广1
作者信息
- 1. 北京宇航系统工程研究所, 北京100076
- 折叠
摘要
Abstract
When inflating gas to a gas vessel of rocket engine at a launching site, a leakage phenomenon occurred after the unloading valve was closed. Abnormal wear of the spool′s guiding part and an uneven indentation on non-metallic sealing surface were found by integrating the macro obser-vation and micro morphology after breaking the valve. The finite element method is used to establish the model of spool and valve seat. It has verified that the calculated indentation depth is close to the measured depth. The analysis results indicate that there exists some tiny original defects in the spool's guiding part of unloading valve, and adhesive wear appears due to the repeated motion between the spool′s guiding part and the guiding hole, which caused the return deflection of the spool in the guide hole and uneven indentation in non-metallic sealing surface, eventually led to leakage of unloading valve during the test.关键词
卸荷开关/形貌分析/有限元分析/泄漏机理Key words
unloading valve/morphology analysis/FEA/leakage mechanism分类
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张连万,薛立鹏,马飞,李文斌,余武江,张志广..充气卸荷开关泄漏机理分析[J].火箭推进,2017,43(5):34-38,5.
