|Table of Contents|

Sealing characteristic of dish-shaped metal seal in LOX/kerosene rocket engine(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2019年04期
Page:
52-57
Research Field:
研究与设计
Publishing date:

Info

Title:
Sealing characteristic of dish-shaped metal seal in LOX/kerosene rocket engine
Author(s):
LEI Zheng; CHEN Yun; LEI Bojuan; CHEN Jianhua
(Xi’an Aerospace Propulsion Institute,Xi’an 710100,China)
Keywords:
LOX/kerosene rocket engine;  dish-shaped metal seal;  sealing characteristic;  axial rigidity characteristic
PACS:
V432
DOI:
-
Abstract:
Dish-shaped metal seal is a kind of precise and closed sealing structure,which shows strong non-linear characteristics during the pre-tightening process and working process.It is impossible to quantify its sealing characteristics intuitively by means of experiment or linear finite element method.In order to solve this problem,a small-diameter dish-shaped metal seal in the LOX/kerosene rocket engine with 1 200 kN thrust level was studied in this paper.By conducting the nonlinear elastic-plastic finite element analysis,the compression quantity of sealing structure,the variation regularity of sealing area and sealing stress with loading load were analyzed.Furthermore,the sealing mechanisms and axial rigidity characteristic of the sealing structure were studied.The analysis results show that the sealing area and stress are formed on the four sealing surfaces after preloading.Under the preloading condition,the dish-shaped ring undergoes “S” deformation and the unstable phenomenon occurs.The pressure and temperature loads of the medium cause the decrease of sealing performance on each sealing surface.

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Last Update: 2019-08-31