|Table of Contents|

Automatic detection technology of redundancy in LOX/kerosene engine(PDF)

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

Issue:
2019年04期
Page:
69-73
Research Field:
工艺与材料
Publishing date:

Info

Title:
Automatic detection technology of redundancy in LOX/kerosene engine
Author(s):
NIU Shufeng; ZHANG Guoyue
(Xi’an Space Engine Company Limited,Xi’an 710000,China)
Keywords:
LOX/kerosene engine;  redundancy;  automatic detection;  acoustic emission;  sensor threshold
PACS:
V261
DOI:
-
Abstract:
The redundancy control is the key to the development and production of aerospace products,and the inspection and elimination of redundancy is an important part of ensuring the reliable operation of rocket engine.In order to solve the problem that the redundancy detection cannot be carried out after the final assembly of 1 200 kN LOX/kerosene engine,the inspected product is rolled by a mechanical turntable,so that the metal redundancy existing in the engine cavity collides and slides with the inner wall.During this process,the generated acoustic signal is transmitted to the outer wall of the product in the form of elastic wave.The signal is monitored by the acoustic emission sensor and converted into a corresponding electrical signal output.The determination information of redundancy and the reference information of its existence position are given.Through the shielding of the floating ring and electromagnetic interference noise in the automatic detection of engine,as well as the research on the engine rolling speed,the sensor threshold and the synchronous reception time of the trigger signal,etc.,the optimum process parameters for engine redundancy detection are obtained.The automatic redundancy detection of 1 200 kN LOX/kerosene engine has been realized.

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Last Update: 2019-08-31