|Table of Contents|

Hot pressing technology and fault analysis of face seal ring for rocket engine(PDF)

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

Issue:
2019年05期
Page:
83-89
Research Field:
工艺与材料
Publishing date:

Info

Title:
Hot pressing technology and fault analysis of face seal ring for rocket engine
Author(s):
WEI Fangsheng1;  ZHUANG Suguo2;  WANG Lei2;  ZHANG Ya2;  ZHANG Qiang2
(1.Xi’an Space Engine Company Limited, Xi’an 710100, China; 2.Xi’an Aerospace Propulsion Institute, Xi’an 710100, China)
Keywords:
static ring;  hot pressing;  fault analysis;  simulation;  test verification
PACS:
V261
DOI:
-
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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Last Update: 2019-10-25