客车气压制动回路快放阀压力响应特性研究

Research on Pressure Response Characteristics of Quick Release Valve for Bus Air Brake Circuit

建立了客车气压制动回路降压过程中制动气室、快放阀等主要部件的理论解析模型,依照国际标准设计了快放阀压力响应特性测试台架;分别通过仿真与试验,从压力响应时间和稳定性两个方面重点分析了快放阀排气口气隙大小和接口直径对压力响应特性的影响。通过对比分析,仿真结果和试验数据具有良好的一致性,验证了理论解析的正确性和试验设计的合理性,可作为气压制动回路设计与研究的参考。

Mathematical model of chamber,quick release valve and other key components are developed during depressurization process of the bus air brake circuit.The quick release valve pressure response characteristics experimental system is build with reference to international standards.Respectively by simulation and experiment,the influence of the outlet gap size and interface diameter on pressure response characteristics are analyzed from two aspects of pressure response time and system stability.By the contrast analysis,the simulation results with experimental data have good consistency,which prove the correctness of the theoretical analysis and the rationality of the design of experiment.The results can be used as a reference for the design and analysis of air brake circuit.