激振系统与平衡阀频率匹配问题分析

Analysis of frequency matching between vibration system and counterbalance valve

针对液压激振系统工作频率对平衡阀启闭性能存在影响,为研究平衡阀与激振系统工作频率匹配的问题,对激振系统平衡回路、先导控制回路和主阀芯受力情况进行数学建模,利用AMESim仿真软件进行分析,并实验验证.仿真结果表明：在激振系统中平衡阀的工作存在非正常工作临界点,对设备安全运行存在较大隐患;非正常工作点出现的原因为单个激振周期小于平衡阀主阀芯启闭时间,其由先导控制腔建压与卸压的时间决定;先导控制回路阻尼孔3和系统控制压力对平衡阀频率匹配影响较大.实验结果与仿真结果相符合,验证了仿真分析的可靠性.

Due to the operation frequency of the hydraulic vibration system could affects the opening and closing performance of the counterbalance valve,the frequency matching between the counterbalance valve and the vibration system was studied.The mathematical modeling and simulation analysis of the vibration system and the counterbalance valve were performed and verified by AMESim software.Simulation results show that there is a critical point of non-normal operation in the operation of counterbalance valve in the vibration system,which is a danger to the safe operation of the equipment.The reason for the abnormal operating point is that a single vibration cycle is less than the opening and closing time of the main valve of the counterbalance valve,which is determined by the time for the pressure building and pressure relief of the right end of the main valve core.The pilot control loop orifice 3 and the system control pressure have a great influence on the frequency matching characteristics of the counterbalance valve.Experimental results are in accordance with the simulation results,verifying the reliability of the simulation analysis.