液压与气动2026，Vol.50Issue(4)：119-126,8.DOI:10.11832/j.issn.1000-4858.2026.04.013
空间站用膜片式减压阀密封设计及验证
Sealing Design and Test Verification of Diaphragm Type Pressure-reducing Valve for Space Station
李磊磊 1谢文 1郭孟蕾 1焦撼宇 1李佳杰 1王琨1
作者信息
- 1. 北京卫星制造厂有限公司,北京 100094
- 折叠
摘要
Abstract
The space station's environmental control and life support system requires pressure-reducing valves with high sealing integrity,pressure stability and mechanical environmental adaptability.A diaphragm type pressure-reducing valve is designed to meet these demands.A micron-scale filter is integrated at the valve's inlet and outlet,which enhances the anti-pollution capability and prevents seal failure caused by foreign objects.The throttling pair employs a titanium alloy-fluororubber edge seal structure with a hard stop design,achieving long-term reliable sealing under low sealing force.The optimized diaphragm structure and fine-thread adjustment mechanism improve outlet pressure control precision.The mechanical simulation analysis confirms that all three primary natural frequencies exceed 2200 Hz,meeting space station mechanical design standards.After random vibration,shock and other mechanical tests,along with helium mass spectrometry leak detection and zero-flow pressure rise sealing tests,the product demonstrates excellent performance consistency before and after mechanical environmental testing.The external leakage rate is not more than 8.0×10-7 Pa·m3/s,with a 0.5 h pressure rise not more than 0.63 kPa.All metrics exceed design requirements.The valve has been successfully deployed in orbit,providing a reference for designing high-precision pressure-reducing valves in the aerospace field.关键词
空间站/膜片式减压阀/密封设计/试验验证Key words
space station/diaphragm type pressure-reducing valve/sealing design/test verification分类
机械制造引用本文复制引用
李磊磊,谢文,郭孟蕾,焦撼宇,李佳杰,王琨..空间站用膜片式减压阀密封设计及验证[J].液压与气动,2026,50(4):119-126,8.
