|Table of Contents|

Research on key technology for low-temperature fatigue test of swing-bellows(PDF)

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

Issue:
2017年04期
Page:
80-83
Research Field:
测控与实验
Publishing date:

Info

Title:
Research on key technology for low-temperature fatigue test of swing-bellows
Author(s):
ZHOU Yunduan;  YANG Mengbo;  MA Xing
Xi’an Aerospace Propulsion Institute, Xi’an 710100, China
Keywords:
swing-bellow;  universal joint pin;  low-temperature fatigue test;  axial pressure balance
PACS:
V434-34
DOI:
-
Abstract:
It is necessary for low-temperature fatigue test to examine and verify fatigue characteristic and reliability of swing-bellows which feed LO2 from rocket's propellant tank to rocket engine. This test system involves several key technologies including simulation of swing conditions, simulation of low-temperature environments and internal pressure, and balance of axial load. The swing-driven subsystem can drive the universal joint pin to swing the swing-bellows by two hydraulic servo cylinders, and simulate the fixing boundary and swing conditions of the swing-bellows. The internal pressure subsystem under low-temperature can feed LN2 into the swing-bellows and simulate working environment. The axial load balance subsystem can balance axial load which is produced by LN2 at work through a balance device fixed in swing-bellows. The test results indicate that the test system is reasonable, the boundary condition of swing bellows on low-temperature fatigue test system is the same as that on rocket engine, and the test parameters meet the system requirement.

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