A method for detecting engine charging pressure by echo test method

Abstract

The invention provides a method for detecting the inflation pressure intensity of an engine through an echo test method. According to the method of the invention, a standard sealing cavity of the samematerial and thickness as an engine combustion chamber blocking cover is established; a pressure intensity environment is established in the standard sealing cavity; the standard sealing cavity is struck, so that echo signals are obtained; an echo signal characteristic frequency is obtained; pressure intensity in the standard sealing cavity is changed according to a given step size, and echo measurement is performed again, so that the characteristic frequency database of the echo signals under different pressure intensities can be obtained; and echo measurement is performed on the engine combustion chamber blocking cover which has been in storage for a long time, an echo signal characteristic frequency is obtained; the echo signal characteristic frequency is compared with the characteristic frequency database; pressure intensity in the engine combustion chamber which has been in storage for a long time is determined, and whether the engine combustion chamber which has been in storagefor a long time leaks air can be judged. The method of the invention is simple and quick, and can quickly perform rocket engine pressure intensity detection in a harsh use environment.

Description

technical field [0001] The invention relates to the technical field of rocket engine detection, in particular to a method for detecting engine charging pressure through an echo test method. Background technique [0002] For rocket engines stored under pressure for a long time, due to the storage time, storage environment, and storage conditions, the internal pressure of the combustion chamber may decrease due to rubber aging and other reasons. In order to ensure that the rocket engine is in normal working condition, it is necessary to check whether the internal pressure of the engine is reduce. [0003] In the traditional long-term storage scheme, the way to detect the internal pressure of the engine is to use external detection components such as pressure gauges connected to external pipelines to connect to the rocket engine for monitoring. Changes in pressure due to the connectivity detection process. [0004] However, in actual use, especially in some relatively harsh a...

AI Technical Summary

Problems solved by technology

[0004] However, in actual use, especially in some relatively harsh assembly environments, it is impossible to use systematic detection components such as pressure gauges for detection, or it is impossible to perform air replenishment operations. At this time, a simple and fast detection method is needed. Rapid detection in the case of dismantling the rocket engine pipeline

Images