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液体火箭发动机试验中,推进剂供应系统阀门的可靠性对保证试验的成败至关重要,阀门的泄漏故障预测与实时监测是试车台推进剂供应系统安全性与可靠性工作的重要内容。对试车台常用的2种阀门进行了声压检测试验,基于声压测量技术,分析阀门出现故障时声压幅值范围和声压谱的故障特征信号,研究了故障阀门的声学特性。结果表明,利用声学检测方法可以有效、简便地检测阀门故障,并且该方法可以推广到其他使用阀门的供应系统中。
Liquid rocket engine test, the reliability of the propellant supply system valve is crucial to ensure the success of the test, valve leakage prediction and real-time monitoring of the test bed propellant supply system safety and reliability of an important part of the work. Based on the sound pressure measurement technology, two kinds of valves commonly used in the test bench were tested for sound pressure. The sound pressure amplitude range and sound pressure spectrum were analyzed based on sound pressure measurement. The acoustic characteristics of the failed valve were studied. The results show that the use of acoustic detection method can be effective and easy to detect valve failure, and the method can be extended to other use of the valve in the supply system.