轴向柱塞泵滑靴副倾覆现象数值分析  

Numerical Simulation of Overturning Phenomenon of Axial Piston Pump Slipper Pair

作　　者：徐兵[1] 李迎兵[1] 张斌[1] 张军辉[1] 

机构地区：[1]浙江大学流体传动及控制国家重点实验室,杭州310027

出　　处：《机械工程学报》2010年第20期161-168,共8页Journal of Mechanical Engineering

基　　金：国家高技术研究发展计划(863计划;2007AA041803);上海市数字化汽车车身工程重点实验室开放课题基金(MSV-2009-02)资助项目

摘　　要：采用一种新的研究方法对滑靴副油膜动态特性进行研究,首先对滑靴副静压支承固定阻尼加可变阻尼组成的流量压力负反馈调节系统进行建模,然后以此为边界条件对滑靴受力/力矩情况和滑靴副倾覆油膜模型的耦合关系进行研究,最后通过Matlab编程搭建滑靴副油膜耦合关系仿真模型,用Newton迭代法求解油膜模型非线性方程组,动态显示滑靴副油膜特性,以分析滑靴副倾覆现象的本质以及弹簧预压紧力对滑靴副倾覆的影响。利用三点确定一平面的原理,通过三点处油膜厚度值对滑靴副油膜厚度场进行建模。分析结果表明,滑靴偏磨一般发生在柱塞腔吸油区到排油区的过渡区,此时的滑靴倾覆程度最大,在滑靴结构一定时,可以通过增大弹簧预压紧力的方法减弱滑靴的倾覆程度。A new method is used for research of the dynamic characteristics of slipper pair oil film in axial piston pump.Firstly,modeling is carried out for the flow-pressure negative feedback regulation system composed of fixed damping and variable damping of hydrostatic slipper pair bearing.Then this is taken as boundary condition for researching the coupling relationship between the force/torque exerted on the slipper and the model of slipper pair overturning oil film.Finally,through Matlab programming,the simulation model of slipper pair oil film coupling relationship is built.Newton iteration method is used to solve the nonlinear equations of oil film model,thus dynamically displaying the characteristics of slipper pair oil film,so as to analyze the nature of slipper overturning phenomenon and the influence of spring pre-pressing force on the slipper overturning.By using the principle of three points defining a plane,the model of oil film thickness-field is built with the values of oil film thicknesses at three points.The simulation results show that the greatest slipper overturning is at the transition from oil sucking area to oil discharging area in the plunger cavity.And when the slipper structure is constant,slipper overturning range can be reduced by increasing the spring pre-pressing force.

关 键 词：轴向柱塞泵 滑靴副 油膜 倾覆 

分 类 号：TH137.51[机械工程—机械制造及自动化]