激振系统与平衡阀频率匹配问题分析
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摘要
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.
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.
引文
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[13]袁士豪,殷晨波,刘世豪.基于AMESim的平衡阀动态性能分析[J].农业机械学报,2013,44(8):273-280.
[14]冀宏,梁宏喜,胡启辉.基于AMESim的螺纹插装式平衡阀动态特性的分析[J].液压与气动,2011(10):80-83.
[15]He X Y,Ying J,Review of hybrid electric systems for construction machinery,automation in construction[J].Automation in Construction,2018,92:286-296.
[2]廉红珍.液压波动激振机理及实验研究[D].太原:太原理工大学机械工程学院,2010.
[3]任燕.高频电液激振器的特性研究[D].杭州:浙江工业大学机械工程学院,2012.
[4]蒙臻.双阀电液激振拉削系统动力学特性及应用研究[D].杭州:浙江理工大学机械与自动控制学院,2017.
[5]梁宏喜.液压平衡阀动态特性的数值解析[D].兰州:兰州理工大学机电工程学院,2011.
[6]朱文锋,焦生杰,杨耀祥,等.平衡阀流量饱和特性研究与应用[J].机械工程学报,2016,52(16):205-212.
[7]李树勋,徐娟娟,范宜霖,等.动态流量平衡阀启闭过程中的线弹性不等值力[J].西南交通大学学报,2015,50(6):1150-1155.
[8]汤何胜,訚耀保,杜广杰.带平衡阀的挖掘机行走马达液压制动特性[J].吉林大学学报:工学版,2014,44(3):680-685.
[9]侯英哲.动态流量平衡阀优化研究及动态特性分析[D].兰州:兰州理工大学机电工程学院,2014.
[10]张大鹏,李鄂民,邵晓寒,等.交变负载中平衡回路的系统稳定性研究[J].机床与液压,2010(9):40-42.
[11]Ritelli G F,Vacca A.Energetic and dynamic impact of counterbalance valves in fluid power machines[J].Energy Conversion and Management,2013,76:701-711.
[12]赵美卿,张立仁,赵彤涌.基于AMESim的掘进机用平衡阀动态特性分析[J].液压与气动,2015(7):51-54.
[13]袁士豪,殷晨波,刘世豪.基于AMESim的平衡阀动态性能分析[J].农业机械学报,2013,44(8):273-280.
[14]冀宏,梁宏喜,胡启辉.基于AMESim的螺纹插装式平衡阀动态特性的分析[J].液压与气动,2011(10):80-83.
[15]He X Y,Ying J,Review of hybrid electric systems for construction machinery,automation in construction[J].Automation in Construction,2018,92:286-296.