Liquid rocket engine test run diaphragm box type end face sealing fault monitoring method

Abstract

The invention relates to a liquid rocket engine test run diaphragm box type end face sealing fault monitoring method, which comprises the following steps of: firstly, setting a pressure measuring point and a temperature measuring point at a blow-off inlet of an isolation cavity of a liquid rocket engine, setting a pressure measuring point and a temperature measuring point at a fuel side discharge port, and setting a pressure measuring point and a temperature measuring point at an oxidant side discharge port; then monitoring parameter thresholds are set, parameters of all the measuring points are collected in real time, and when the parameters exceed the corresponding thresholds, it is judged that an end face sealing fault occurs. Meanwhile, the end face sealing leakage amount can be calculated.

Description

technical field [0001] The invention belongs to the field of liquid rocket engine fault diagnosis, and relates to a liquid rocket engine test-run bellows-type end face seal fault monitoring method. Background technique [0002] The pump-type liquid rocket engine uses a turbo pump to provide the energy source for the propellant. The bellows-type end-face seal is often used in the turbo-pump device. During the engine startup, steady-state operation and shutdown process, the end-face seal bears a large load. When the end face seal fails, it will cause dangers such as propellant leakage and explosion. [0003] At present, the pressure parameters of turbo pumps, gas generators and other components are mainly monitored in the fault diagnosis of liquid rocket engines. There are few methods for fault monitoring of the end face seal structure. During the engine test process, there were cases where the end face seal failure caused the test failure. , it can only be confirmed that the...

AI Technical Summary

Problems solved by technology

When the face seal fails, it will cause hazards such as propellant leakage and explosion

[0003] At present, the fault diagnosis of liquid rocket engines mainly monitors the pressure parameters of turbo pumps, gas generators and other components, and there are few methods for fault monitoring of the end face seal structure. During the engine test, there were cases of end face seal failures that led to test failures. , the failure of the end face seal can only be confirmed during the inspection process after the engine works, which has a potential impact on the working safety of the engine

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