Improvement of bellow assembly used as moving sealing unit of pre-pump valve(PDF)
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
- Issue:
- 2012年05期
- Page:
- 42-47
- Research Field:
- 研究与设计
- Publishing date:
Info
- Title:
- Improvement of bellow assembly used as moving sealing unit of pre-pump valve
- Author(s):
- SUN Kai; LUO Yue
- Beijing Aerospace Propulsion Institute, Beijing 100076, China
- Keywords:
- bellows assemblyfatigue are basically consistent and satisfied lifestressreliability
- PACS:
- V434-34
- DOI:
- -
- Abstract:
- In a sample test of pre-pump valves for a certain rocket engine, the fatigue failure of the valve's opening-closing cavity bellow assembly occurred. The analysis result shows that the causation of fatigue is bi-directional bending fatigue rupture. Aiming at the problem of protraction and contraction of the bellow assembly, some improvement on the bellow assembly, finite element analysis, bellow trial-manufacture and bellow fatigue test were made. The results indicate the stress distribution of new bellows assembly is reasonable, the fatigue life increases greatly. The improved bellow was tested. The computation and the testing results are basically consistent and satisfied.
Last Update: 1900-01-01