|Table of Contents|

Research on bonding process of fluoroplastic-valve spool(PDF)

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

Issue:
2020年02期
Page:
92-96
Research Field:
工艺与材料
Publishing date:

Info

Title:
Research on bonding process of fluoroplastic-valve spool
Author(s):
MA Hairui;  ZHANG Wanqing;  JIANG Chao
(Xi’an Aerospace Propulsion Institute, Xi’an 710100, China)
Keywords:
valve spool;  fluoroplastic;  metal;  bonding process;  adhesive
PACS:
V261
DOI:
-
Abstract:
In order to solve the problem of poor bonding between the fluoroplastic and the metal in the main valve spool of liquid rocket engine, the cause and bonding process were studied in this paper.The bonding method of coating self-made polyfluoroethylene propylene adhesive before pressing the fluoroplastic in the valve spool was used.The microstructure and morphology of the bonding surface were observed by scanning the electron microscopy and the energy spectrum was analyzed, and then the mechanism analysis of the bonding process coated with polyperfluoroethylene propylene adhesive was carried out.Finally, the verification of bonding process for the bacterial sample, the valve spool process and the work performance test were carried out.The test results indicate that the bonding process of coating the polyfluorinated ethylene propylene adhesive 2 times can be used to improve the bonding strength of fluoroplastics and metal.The bonding strength can be increased to more than 19 MPa, which is 3 times the bonding strength of uncoated valve spool and metal.The coating bonding process can achieve a valve spool bonding rate of 100% and the performance meets the requirements, which effectively solve the problem of poor bonding of the main valve spool in liquid rocket engine.

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Last Update: 2020-04-25