An airtight leak detection method for a liquid rocket engine propellant supply pipeline

Abstract

The invention relates to a liquid rocket motor propellant supply pipeline airtight leakage detection system and method, and solves the problems that the present pipeline airtightness detection methodhas high workload and long period and has difficulty to detect the micro-leakage. The airtight leakage detection system comprises sensors, a front-end transfer cabinet, a measuring cable, a data acquisition module, data analysis equipment and a displayer. The data acquisition module comprises a signal conditioning circuit, an amplification circuit, a filter circuit and an A / D conversion circuit. The data analysis equipment is the computer. The displayer is connected with the data analysis equipment. The sensors include a temperature sensor, a pressure sensor and an acoustic emission sensor. The signals acquired from the sensors are transmitted to the data acquisition module through the front-end transfer cabinet and the measuring cable, and the signals are transmitted to the data analysisequipment through amplification, filtering and A / D conversion. The airtight leakage detection method based on the airtight leakage detection system comprises the following steps: 1) sensor installation; 2) sensor verification; 3) data acquisition; and 4) data processing.

Description

technical field [0001] The invention relates to the field of fault monitoring, in particular to an airtight leak detection method for a liquid rocket engine propellant supply pipeline. Background technique [0002] The pressure pipeline is the most basic unit for transporting fluid in the field of liquid rocket engine testing. Due to the aging of the pipeline used in the test, changes in geographical and climatic environments, and other reasons, pipeline leakage accidents often occur during thermal tests or propellant filling. , the propellant used in the test has the characteristics of high toxicity, flammability (fuel), and volatile (oxidizer). The high-purity nitrogen used for valve control, pressurization, blowing, etc. If there is a large amount of nitrogen leakage, the consequences will be very serious. In order to ensure the reliability of the test process system and prevent the phenomenon of running, escaping, and dripping of the medium in the pipeline, it is necess...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing pipeline airtightness detection method has a large workload, a long cycle, and is difficult to check micro-leakage, and provides an airtight leak detection method for a liquid rocket engine propellant supply pipeline, The invention adopts three kinds of detection means to cooperate with each other and complement each other, which can efficiently and reliably complete the airtight inspection of the pressure pipeline

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