径向往复泵动力端部件的研究
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摘要
随着科学技术的不断高速发展,现代设备的自动化水平越来越高,对液压泵的性能要求也越来越高。本课题致力于研制开发一种新型的四缸径向柱塞往复泵,泵的动力端采用了单拐双滑机构取代传统的凸轮机构和曲柄连杆机构,具有设计新颖,结构简单紧凑,比传统泵体积小,噪音低,节能,外形美观,运转平稳,性能可靠,单人拆装维修方便,使用范围广等一系列特点。
本文以径向柱塞往复泵的动力端为研究对象,探讨了传统凸轮机构往复泵的结构原理以及不足之处,在此基础上设计出了一种新型的四缸径向柱塞往复泵的工作原理以及结构方案,并进一步对动力端的关键零部件进行分析研究和结构改进。
利用三维建模软件Pro/E建立了泵体的三维模型,为进一步的仿真分析和结构改进奠定了基础。建立了泵的动力端虚拟样机,利用Admas软件对泵的动力端进行仿真分析,方便快速的得到了动力端各零部件的运动学和动力学参数,直观地展现了四缸径向柱塞往复泵的运动特性。动力学仿真分析的结果,为四缸径向柱塞往复泵的进一步设计和改进提供了可靠的依据。对动力端关键零部件偏心轴体进行了结构尺寸设计以及动平衡设计,并对轴体进行有限元分析,验算偏心轴体的强度。研究了滑板上承受的扭矩和由于承受扭矩而产生的滑板上的载荷分布不均匀的状况,将原径向对称布置的四个柱塞往复体的柱塞中心线相对于主轴对称线绕主轴旋转的反方向依次偏置一定距离,极大的减小了滑板上承受的扭矩和滑板上由于承受扭矩而产生的弯曲应力,改善了滑板上所受载荷不均匀分布的状况,有效的减小了滑板的磨损。
本文的创新之处在于：
1、新型柱塞往复泵的动力端采用单拐双滑机构取代传统的凸轮机构和曲柄连杆机构,既具有曲柄连杆机构的承载能力,又具有凸轮机构的简单结构形式。
2、提出了将原径向对称布置的四个柱塞往复体的柱塞中心线相对于主轴对称线绕主轴旋转的反方向依次偏置一定距离的设计方案,极大的减小了滑板上承受的扭矩和滑板上由于承受扭矩而产生的载荷不均匀分布的状况,有效的提高了滑板摩擦副的可靠性。
With the continuously rapid development of science and technology, the equipments become more and more automatic and the requirements of the hydraulic pump are also higher.This subject is about researching a new type of four cylinder radial reciprocating piston pump.The power end of the pump uses a double slide cane instead of traditional CAM and crank rod system.It is novel designed, simple and compact structure, smaller and lower noise than traditional pump, energy saving, appearance beautiful, smooth operation, reliable performance, single disassembling and maintenance convenience, wide utilization and so on.
The research object is based on the power end of the radial piston reciprocating pump, discussed the deficiencies of the traditional CAM mechanism structure theory and reciprocating pump, devised a new type structure scheme and working principle of the four cylinder radial piston reciprocating pump, designed the key parts of the power structure further, analysised and improved performance.
It established the 3d model of the pump body with three-dimensional modeling software Pro/E, for analysising and simulationing the structure improvement further. It established the virtual prototype of the pump power and simulation analysised by Admas,conveniently and fast gained the kinematics and dynamics parameters of the power end parts,intuitively showing the motion characteristics of the four cylinder radial reciprocating piston pump. It provided the reliable basis for designing and improving the four cylinder radial reciprocating piston pump further by combining to the results of the dynamics simulation and the theoretical calculation. It designed the structure、size and dynamic balance of the key parts of the eccentric shaft, and finite element analysised it. Research the distribution of bending stress due to the torque and load points of skateboard. It offseted a certain distance between the four piston centerline and the spindle symmetric line relatived to the spindle rotation direction. It would greatly decreased the bending stress、the degree of load distributed non-uniform and effectively reduced the wear of skateboard, because of reducing the torque of skatbord.
The innovationes of this paper lies in:
1. It devised a new type structure scheme and working principle of the four cylinder radial piston reciprocating pump, has the bearing capacity of the crank rod system and the simple structure form of CAM.
2. It offseted a certain distance between the four piston centerline and the spindle symmetric line relatived to the spindle rotation direction. It would greatly decreased the bending stress、the degree of load distributed non-uniform and effectively reduced the wear of skateboard.
本文以径向柱塞往复泵的动力端为研究对象,探讨了传统凸轮机构往复泵的结构原理以及不足之处,在此基础上设计出了一种新型的四缸径向柱塞往复泵的工作原理以及结构方案,并进一步对动力端的关键零部件进行分析研究和结构改进。
利用三维建模软件Pro/E建立了泵体的三维模型,为进一步的仿真分析和结构改进奠定了基础。建立了泵的动力端虚拟样机,利用Admas软件对泵的动力端进行仿真分析,方便快速的得到了动力端各零部件的运动学和动力学参数,直观地展现了四缸径向柱塞往复泵的运动特性。动力学仿真分析的结果,为四缸径向柱塞往复泵的进一步设计和改进提供了可靠的依据。对动力端关键零部件偏心轴体进行了结构尺寸设计以及动平衡设计,并对轴体进行有限元分析,验算偏心轴体的强度。研究了滑板上承受的扭矩和由于承受扭矩而产生的滑板上的载荷分布不均匀的状况,将原径向对称布置的四个柱塞往复体的柱塞中心线相对于主轴对称线绕主轴旋转的反方向依次偏置一定距离,极大的减小了滑板上承受的扭矩和滑板上由于承受扭矩而产生的弯曲应力,改善了滑板上所受载荷不均匀分布的状况,有效的减小了滑板的磨损。
本文的创新之处在于：
1、新型柱塞往复泵的动力端采用单拐双滑机构取代传统的凸轮机构和曲柄连杆机构,既具有曲柄连杆机构的承载能力,又具有凸轮机构的简单结构形式。
2、提出了将原径向对称布置的四个柱塞往复体的柱塞中心线相对于主轴对称线绕主轴旋转的反方向依次偏置一定距离的设计方案,极大的减小了滑板上承受的扭矩和滑板上由于承受扭矩而产生的载荷不均匀分布的状况,有效的提高了滑板摩擦副的可靠性。
With the continuously rapid development of science and technology, the equipments become more and more automatic and the requirements of the hydraulic pump are also higher.This subject is about researching a new type of four cylinder radial reciprocating piston pump.The power end of the pump uses a double slide cane instead of traditional CAM and crank rod system.It is novel designed, simple and compact structure, smaller and lower noise than traditional pump, energy saving, appearance beautiful, smooth operation, reliable performance, single disassembling and maintenance convenience, wide utilization and so on.
The research object is based on the power end of the radial piston reciprocating pump, discussed the deficiencies of the traditional CAM mechanism structure theory and reciprocating pump, devised a new type structure scheme and working principle of the four cylinder radial piston reciprocating pump, designed the key parts of the power structure further, analysised and improved performance.
It established the 3d model of the pump body with three-dimensional modeling software Pro/E, for analysising and simulationing the structure improvement further. It established the virtual prototype of the pump power and simulation analysised by Admas,conveniently and fast gained the kinematics and dynamics parameters of the power end parts,intuitively showing the motion characteristics of the four cylinder radial reciprocating piston pump. It provided the reliable basis for designing and improving the four cylinder radial reciprocating piston pump further by combining to the results of the dynamics simulation and the theoretical calculation. It designed the structure、size and dynamic balance of the key parts of the eccentric shaft, and finite element analysised it. Research the distribution of bending stress due to the torque and load points of skateboard. It offseted a certain distance between the four piston centerline and the spindle symmetric line relatived to the spindle rotation direction. It would greatly decreased the bending stress、the degree of load distributed non-uniform and effectively reduced the wear of skateboard, because of reducing the torque of skatbord.
The innovationes of this paper lies in:
1. It devised a new type structure scheme and working principle of the four cylinder radial piston reciprocating pump, has the bearing capacity of the crank rod system and the simple structure form of CAM.
2. It offseted a certain distance between the four piston centerline and the spindle symmetric line relatived to the spindle rotation direction. It would greatly decreased the bending stress、the degree of load distributed non-uniform and effectively reduced the wear of skateboard.
引文
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[2]刘小红.新型径向柱塞泵动力学分析及变量控制研究[O].西安：西北工业大学,2004.
[3]赵亚风.高压低噪声机电控制式径向柱塞泵(JBP系列)的结构特点及性能[J].重型机械,2001,(01)：13-14.
[4]刘连山.液压传动与控制：人民交通出版社,1983.12
[5]俞云飞.液压泵的发展展望[J]：液压气动与密封,2003.(4)：10-15
[6]闻德生.开路式柱塞泵[M].北京：航空工业出版社,2002.
[7]吴远库.径向柱塞泵重要摩擦副的技术研究[D].西安：西北工业大学,2005.
[8]刘小红.新型径向柱塞泵动力学分析及变量控制研究[O].西安：西北工业大学,2004.
[9]赵亚风.高压低噪声机电控制式径向柱塞泵(JBP系列)的结构特点及性能[J].重型机械,2001,(01)：13-14.
[10]王伟健.低噪声双作用径向柱塞泵的设计与研究[O].兰州：兰州理工大学,2006.
[11]徐绳武.柱塞式液压泵(M).北京：机械工业出版社,1985.
[12]裘信国.断面配流径向式液压泵特性的研究：[博士学位论文].浙江：浙江工业大学,2009
[13]杨国来,王伟健,王连波,张守印.低噪声径向柱塞泵的设计与研究[J].机床与液压,2007,(2)：
[14]杨国来,王伟健,张守印,赵亚风.新型双作用径向柱塞泵的定子曲线设计及流量脉动分析[J].机床与液压,2005,(11)：123-24.
[15]杨国来,王伟健,张守印,卢堑.新型双作用柱塞泵减振二角槽的研究[J].液压与气动,2005,(12)：62-65
[16]杨国来,王伟健,张守印,吴艳玲.新型双作用径向柱塞泵的设计[J].液压与气动,2005,(6)：78-79
[17]BIERISWISSHYDRAULICS. RadialPistonPumPs[OL]. httP://www.bierihydraulies.eor n/standard-eomPonents/PumPs.html,2007-4-5
[18]方建忠.多排式轴向柱塞泵的关键技术研究及动态仿真：[硕士学位论文].重庆：重庆大学,2007
[19]范卓立.基于虚拟样机技术的轴向柱塞泵运动及动力特性仿真分析：[硕士学位论文]. 河北：燕山大学,2007
[20]杨智伟.轴向柱塞泵虚拟样机仿真技术： [硕士学位论文],浙江：浙江大学,2006
[21]徐文琴.径向柱塞泵静压支承圆柱副性能研究： [硕士学位论文],浙江：浙江工业大学,2004
[22]贾跃虎.径向柱塞泵设计参数分析[J].液压气动与密封,2004(2)
[23]刘陪忠.新型径向柱塞泵设计参数分析[J].液压气动与密封,2006(3)
[24]市川长雄.关于柱塞压力平衡理论[J],油压化设计1965,Vol3,No2
[25]赵道生.ZBD-75轴向柱塞泵缸体——柱塞,2008(2)：46-48
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