柱塞副微运动轨迹及微倒角对其影响分析
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摘要
针对轴向柱塞泵柱塞副由于接触造成的磨损问题,建立了柱塞副油膜弹性流体动压润滑数值仿真模型,在此基础上分析了柱塞在缸体孔内微运动轨迹及柱塞与缸体接触状态.提出了柱塞微深度倒角的结构改进措施,通过仿真对比了不同尺寸倒角对接触程度的影响.结果表明:微深度倒角有利于减少柱塞与缸体孔的接触,倒角深度对减少接触的作用比倒角长度更加明显;所提出的数值模型和改进措施有利于实现柱塞泵的优化设计,通过降低柱塞副的磨损最终提高柱塞泵的寿命和可靠性.
To solve the wear between piston and cylinder due to contact,the elastohydrodynamic numerical model of oil film on piston was established and the micro motion of piston was studied to analyse the contact status between piston and cylinder. Micro-depth chamfering was introduced to realize the structural optimization design. The impact of different size chamfering on piston contact status was compared.The results show that micro-depth chamfering is beneficial to reduce the contact between the plunger and the cylinder and the chamfering depth has more obvious effect than the chamfering length.The numerical model and optimization measures proposed in this paper has the potential to realize the optimal design of the piston pump and improve its service life and reliability by reducing the wear of the piston and cylinder.
To solve the wear between piston and cylinder due to contact,the elastohydrodynamic numerical model of oil film on piston was established and the micro motion of piston was studied to analyse the contact status between piston and cylinder. Micro-depth chamfering was introduced to realize the structural optimization design. The impact of different size chamfering on piston contact status was compared.The results show that micro-depth chamfering is beneficial to reduce the contact between the plunger and the cylinder and the chamfering depth has more obvious effect than the chamfering length.The numerical model and optimization measures proposed in this paper has the potential to realize the optimal design of the piston pump and improve its service life and reliability by reducing the wear of the piston and cylinder.
引文
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[13]ZHANG J H,CHAO Q,XU B,et al.Effect of pistonslipper assembly mass difference on the cylinder block tilt in a high-speed electro-hydrostatic actuator pump of aircraft[J].International Journal of Precision Engineering and Manufacturing,2017,18(7):995-1003.
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[15]李晶,陈昊,訚耀保.轴向柱塞泵柱塞副偏心状态油膜特性分析[J].华南理工大学学报:自然科学版,2016,44(10):30-35.
[16]王克龙,姜继海,刘忠迅.轴向柱塞泵柱塞腔压力及其对柱塞微运动的影响[C]//第九届全国流体传动与控制学术会议论文集.杭州:中国机械工程学会流体传动与控制分会,2016:509-513.
[17]WANG D Y,SONG Y,TIAN J H,et al.Research on the fluid film lubrication between the piston-cylinder interface[J].Aip Advances,2018,8(10):1-17.
[2]SHEN W,HUANG H,PANG Y,et al.Review of the energy saving hydraulic system based on common pressure rail[J].IEEE Access,2017,5:655-669.
[3]YAMAGUCHI A.Motion of the piston in piston pumps and motors:experiments and theoretical discussion[J].Transactions of the Japan Society of Mechanical Engineers,1994,37:83-88.
[4]WIECZOREK U,IVANTYSYNOVA M.Computer aided optimization of bearing and sealing gaps in hydrostatic machines:the simulation tool caspar[J].International Journal of Fluid Power,2002,3(1):7-20.
[5]PELOSI M,IVANTYSYNOVA M.A novel fluidstructure interaction model for lubricating gaps of piston machines[J].Fluid Structure Interaction,2009,105:13-20.
[6]PELOSI M,IVANTYSYNOVA M.Surface deformations enable high pressure operation of axial piston pumps[C]//Proc of the ASME Dynamic Systems and Control Conference and Bath/Asme Symposium on Fluid Power and Motion Control(Dscc 2011).Chicago:ASME,2012:193-200.
[7]WONDERGEM A M,IVANTYSYNOVA M.The impact of micro-surface shaping on the piston/cylinder interface of swash plate type machines[C]//Proc of ASME/Bath Symposium on Fluid Power&Motion Control.Chicago:ASME,2015:V001T01A060.
[8]BUSQUETS A.An investigation of micro-surface shaping on the piston/cylinder interface of axial piston machines[D].West Lafayette:Mechanical Engineering Division,Purdue University,2018:27-36.
[9]GELS S,MURRENHOFF H.Simulation of the lubricating film between contoured piston and cylinder[J].International Journal of Fluid Power,2010,11(2):15-24.
[10]翟江,周华.海水淡化轴向柱塞泵的虚拟样机技术研究[J].华中科技大学学报:自然科学版,2012,40(3):108-112.
[11]XU B,ZHANG J H,YANG H Y,et al.Investigation on the radial micro-motion about piston of axial piston pump[J].Chinese Journal of Mechanical Engineering,2013,26(2):325-333.
[12]XU B,ZHANG J H,YANG H Y.Simulation research on distribution method of axial piston pump utilizing pressure equalization mechanism[J].Journal of Mechanical Engineering Science,2013,227(C3):459-469.
[13]ZHANG J H,CHAO Q,XU B,et al.Effect of pistonslipper assembly mass difference on the cylinder block tilt in a high-speed electro-hydrostatic actuator pump of aircraft[J].International Journal of Precision Engineering and Manufacturing,2017,18(7):995-1003.
[14]胡敏.轴向柱塞泵摩擦副功率损失分析与表面形貌设计研究[D].杭州:浙江大学图书馆,2017:119-130.
[15]李晶,陈昊,訚耀保.轴向柱塞泵柱塞副偏心状态油膜特性分析[J].华南理工大学学报:自然科学版,2016,44(10):30-35.
[16]王克龙,姜继海,刘忠迅.轴向柱塞泵柱塞腔压力及其对柱塞微运动的影响[C]//第九届全国流体传动与控制学术会议论文集.杭州:中国机械工程学会流体传动与控制分会,2016:509-513.
[17]WANG D Y,SONG Y,TIAN J H,et al.Research on the fluid film lubrication between the piston-cylinder interface[J].Aip Advances,2018,8(10):1-17.
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