|Table of Contents|

Force characteristics of frange structure bolts and seals under working pressure(PDF)

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

Issue:
2021年05期
Page:
65-70
Research Field:
研究与设计
Publishing date:

Info

Title:
Force characteristics of frange structure bolts and seals under working pressure
Author(s):
XUE Jie; HUANG Jinping
(Science and Technology on Liquid Rocket Engine Laboratory, Xian Aerospace Propulsion Institute,Xian 710100,China)
Keywords:
connecting flange bolt force sealing element rigidity
PACS:
V214
DOI:
-
Abstract:
In order to study the variation mechanism of bolt force and seal contact force in typical flange structure under working pressure,firstly,the force analysis of the seal,flange and connecting bolts in pre-tightening state and working state is carried out. The equilibrium equations of force and torque are established for the flange in axial and rotational directions,and the relationship between the bolt force increment and the working pressure increment is obtained through the theoretical derivation of equilibrium equations. Secondly,the finite element model of flange seal is established and the simulation calculation under the working pressure is carried out. The results show that the mechanical analysis of the flange is accurate and reasonable,which effectively verifies the derivation and correctness of the theoretical formula. Finally,on the basis of the derived theoretical formula,the relationship between bolt force,seal contact force and seal inner radius R,distance L between bolt and seal, seal compression/tensile stiffness K during the working process is accurately obtained,which provides a reference for the structural design and optimization of flange seal.

References:

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