无同步齿轮液压振动锤系统的马达泄漏特性及耦合同步条件
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摘要
为研究2个马达内部结构差异引起的油液泄漏差异对系统耦合同步能力的影响,以双马达无同步齿轮液压振动锤为对象,考虑液压系统和土的非线性,用流体力学、振动力学、土动力学和机电液耦合动力学理论建立系统耦合振动状态下机-电-液-桩-土整体系统的运动模型,运用Matlab/Simulink对该模型进行仿真研究,分析不同马达柱塞副间隙对系统同步振动的影响。研究结果表明:以马达A柱塞副间隙δ1=2.0×10-5 m为基准,当马达B柱塞副间隙δ1为(2.0～2.6)×10-5 m时,系统经过几秒钟振荡后能够实现同步振动;当马达B柱塞副间隙不在这一范围时,系统将无法实现同步振动;建模仿真结果反映了马达内部结构差异对系统耦合同步能力的影响,可为无同步齿轮液压振动机械液压系统的设计提供参考依据。
The hydraulic vibratory hammer without synchronizing gears was studied to obtain the effects of the structural differences between the two motors on coupling synchronization of the two-eccentric-rotary system. Taking the nonlinearity of hydraulic system and soil into account, the motion model of the system composed of machinery,clectron, hydraulics and soil was established under the coupled vibration condition based on the theory of fluid mechanics,vibration mechanics, soil dynamics and electromechanical fluid coupling dynamics. By means of Matlab/Simulink, the effects of different clearance values on the system synchronization were analyzed. The results show that the system can achieve synchronization after seconds of oscillation when the piston pair clearance value of the motor A(δ1=2.0×10-5 m)is taken as the benchmark and that of the motor B is within the range of(2.0-2.6)×10-5 m. But if the clearance value of the motor B is not in the range of(2.0-2.6)×10-5 m, the system can not achieve synchronization. The modeling and simulation correctly reflect the relationship between the internal structure of the motors and the system coupling synchronization, which can provide reference for the design of the hydraulic vibratory hammer.
The hydraulic vibratory hammer without synchronizing gears was studied to obtain the effects of the structural differences between the two motors on coupling synchronization of the two-eccentric-rotary system. Taking the nonlinearity of hydraulic system and soil into account, the motion model of the system composed of machinery,clectron, hydraulics and soil was established under the coupled vibration condition based on the theory of fluid mechanics,vibration mechanics, soil dynamics and electromechanical fluid coupling dynamics. By means of Matlab/Simulink, the effects of different clearance values on the system synchronization were analyzed. The results show that the system can achieve synchronization after seconds of oscillation when the piston pair clearance value of the motor A(δ1=2.0×10-5 m)is taken as the benchmark and that of the motor B is within the range of(2.0-2.6)×10-5 m. But if the clearance value of the motor B is not in the range of(2.0-2.6)×10-5 m, the system can not achieve synchronization. The modeling and simulation correctly reflect the relationship between the internal structure of the motors and the system coupling synchronization, which can provide reference for the design of the hydraulic vibratory hammer.
引文
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[14]ZHANG Xueliang,WEN Bangchun,ZHAO Chunyu.Vibratory synchronization and coupling dynamic characteristics of multiple unbalanced rotors on a mass-spring rigid base[J].International Journal of Non-linear Mechanics,2014,60(6):1-8.
[15]BERGADA J M,KUMAR S,DAVIES D LI.A complete analysis of axial piston pump leakage and output flow ripples[J].Applied Mathematical Modelling,2012,36(6):1731-1751.
[2]YANG Xiaoli,ZOU Jinfeng.Displacement and deformation analysis for uplift piles[J].Journal of Central South University of Technology,2008,15(3):906-910.
[3]罗春雷.液压振动桩锤沉桩动力学及调频调矩控制研究[D].长沙:中南大学机电工程学院,2005:23-41.LUO Chunlei.Dynamic studies and control of frequency and eccentric moment of hydraulic vibratory pile driver[D].Changsha:Central South University.School of Mechanical and Electrical Engineering,2005:23-41.
[4]曹胜敏.高桩码头桩竖向荷载下静动力学行为研究[D].成都:西南交通大学土木工程学院,2008:77-92.CAO Shengmin.Research on static-dynamic mechanical behaviors of pier pile under vertical load[D].Chengdu:Southwest Jiaotong University.School of Civil Engineering,2008:77-92.
[5]谢小娟.振动沉桩过程中的桩土相互作用的动力学分析[D].沈阳:东北大学土木工程学院,2010:56-78.XIE Xiaojuan.Dynamic analysis of the pile-soil interaction in process of vibratory sinking piles[D].Shenyang:Northeastern University.School of Civil Engineering,2010:56-78.
[6]XU Bing,HU Min,ZHANG Junhui,et al.Characteristics of volumetric losses and efficiency of axial piston pump with respect to displacement conditions[J].Journal of Zhejiang University:Science A(Applied Physics&Engineering),2016,17(3):186-201.
[7]谢江辉,刘健,尚进,等.斜盘式轴向柱塞泵泄漏量的分析与计算[J].流体机械,2016,44(2):55-58,70.XIE Jianghui,LIU Jian,SHANG Jin,et al.Analysis and calculation of leakage of swashplate axial piston pump[J].Fluid Machinery,2016,44(2):55-58,70.
[8]范芳洪,钟振龙,石金艳.轴向柱塞马达柱塞副泄漏流量的计算与分析[J].液压气动与密封,2010,62(10):21-31.FAN Fanghong,ZHONG Zhenlong,SHI Jinyan.Axial piston motor plunger pair of leakage flow calculation and analysis[J].Hydraulics Pneumatics&Seals,2010,62(10):21-31.
[9]汤何胜,訚耀保,杜广杰.带螺纹插装式溢流阀的液压马达特性及试验研究[J].中南大学学报(自然科学版),2014,45(1):77-83.TANG Hesheng,YIN Yaobao,DU Guangjie.Study on characteristics of hydraulic motor with a threaded cartridge pressure relief valve[J].Journal of Central South University(Science and Technology),2014,45(1):77-83.
[10]LEE S H,KIM B I,HAN J T.Prediction of penetration rate of sheet pile installed in sand by vibratory pile driver[J].KSCEJournal of Civil Engineering,2012,16(3):316-324.
[11]张斌.轴向柱塞泵的虚拟样机及油膜压力特性研究[D].杭州:浙江大学机械工程学院,2009:21-27.ZHANG Bin.Study on virtual prototype and pressure characterstics of oil film for axial piston pump[D].Hangzhou:Zhejiang University.School of Mechanical Engineering,2009:21-27.
[12]杨秀峰.水压环形缝隙泄漏特性的理论和实验研究[D].武汉:华中科技大学机械工程学院,2012:10-41.YANG Xiufeng.Theoretical and experimental researches on leakage characteristics of water hydraulic annular clearance[D].Wuhan:Huazhong University of Science and Technology.School of Mechanical Engineering,2012:10-41.
[13]张宜.基于沉桩阻力滞回非线性特征的振动锤沉桩能力研究[D].长沙:中南大学机电工程学院,2013:17-51.ZHANG Yi.Study of vibratory hammer's driveability based on the hysteretic nonlinear resistance[D].Changsha:Central South University.School of Mechanical and Electrical Engineering,2013:17-51.
[14]ZHANG Xueliang,WEN Bangchun,ZHAO Chunyu.Vibratory synchronization and coupling dynamic characteristics of multiple unbalanced rotors on a mass-spring rigid base[J].International Journal of Non-linear Mechanics,2014,60(6):1-8.
[15]BERGADA J M,KUMAR S,DAVIES D LI.A complete analysis of axial piston pump leakage and output flow ripples[J].Applied Mathematical Modelling,2012,36(6):1731-1751.