航天推进技术研究院主办
[1]魏芳胜,庄宿国,王 磊,等.火箭发动机端面密封静环热压工艺及故障分析[J].火箭推进,2019,45(05):83-89.
WEI Fangsheng,ZHUANG Suguo,WANG Lei,et al.Hot pressing technology and fault analysis of face seal ring for rocket engine[J].Journal of Rocket Propulsion,2019,45(05):83-89.
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WEI Fangsheng,ZHUANG Suguo,WANG Lei,et al.Hot pressing technology and fault analysis of face seal ring for rocket engine[J].Journal of Rocket Propulsion,2019,45(05):83-89.
火箭发动机端面密封静环热压工艺及故障分析
《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]
卷:
45
期数:
2019年05期
页码:
83-89
栏目:
工艺与材料
出版日期:
2019-10-30
- Title:
- Hot pressing technology and fault analysis of face seal ring for rocket engine
- 文章编号:
- 1672-9374(2019)05-0083-07
- Keywords:
- static ring; hot pressing; fault analysis; simulation; test verification
- 分类号:
- V261
- 文献标志码:
- A
- 摘要:
- 静环是端面密封的主要组成部分,石墨环热压环节是整个静环生产的核心,热压成品率直接关系端面密封的质量可靠性。结合生产工艺过程,深入分析了热压工艺机理,建立了静环热压的数学模型,明确了镶嵌应力、过盈量校核等一系列参数。在此基础上,形成了一套完备的热压工艺方法。结合某型号试车端面密封故障问题,对静环进行了仿真分析和试验验证。结果表明,在热反浸过程端面密封受到高温作用,由于石墨材料线性膨胀系数发生变化,导致石墨环和静环座间的过盈量减小,过盈连接部位局部存在微缝隙,石墨环受高压介质挤压不均匀脱出,石墨环脱出不均匀导致石墨端面变形,产生泄漏。
- Abstract:
- Static ring is the main component of the face seal, the hot pressing of graphite ring is the core of the static ring production, the yield is directly related to the quality reliability.Based on the production process, the mechanism of hot pressing process was deeply analyzed, and the mathematical model of static ring hot pressing was established, and a series of parameter, such as the mosaic stress, the amount of interference were defined.On this basis, a complete set of hot pressing process was formed.The simulation analysis and experimental verification of the static ring were carried out based on the seal failure of a certain type of tests.Results show that in the process of hot dipping high temperature effect of face seal, the interference between graphite ring and static ring seat decreases due to the change of linear expansion coefficient of graphite material, then there are some gaps in the interference junction, graphite ring by high-pressure uneven extrusion, which leads to deformation of the graphite ring face and results in leakage.
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备注/Memo
收稿日期:2019-05-13; 修回日期:2019-07-17基金项目:国家自然科学基金(U1737112); 中国航天科技集团有限公司重大工艺课题(ZDGY2017-20)作者简介:魏芳胜(1987—),男,硕士,工程师,研究领域为液体火箭发动机涡轮泵制造及装配
更新日期/Last Update:
2019-10-25