高压高速条件下柱塞副泄漏流场分析  

Analysis on the Leaking Flow Field of the Piston Sector Considering the High Press and High Velocity

作　　者：胡仁喜[1,2] 苑士华[2] 刘红宁[1] 孟秋红[1] 

机构地区：[1]军械工程学院机械设计教研室,石家庄050003 [2]北京理工大学机械与车辆工程学院,北京100081

出　　处：《农业机械学报》2009年第4期221-226,共6页Transactions of the Chinese Society for Agricultural Machinery

摘　　要：建立了高压、高转速条件下柱塞泵柱塞副泄漏流场的数学模型,并进行了数值模拟分析。首先,对柱塞副进行了三维动力学分析,对柱塞副受力变化规律进行了Matlab数值分析。然后,建立了基于柱塞倾斜角度φ和偏心距离e的柱塞副倾斜偏心圆环缝隙泄漏流场数学模型,并结合柱塞副动力学分析结果,利用动压支撑理论确定了倾斜偏心泄漏流场数学模型中的φ和e。利用有约束的一维搜索法编写Matlab程序对柱塞副流场进行优化数值求解。最后,利用Fluent软件对柱塞副泄漏流量进行了仿真分析和实验验证。结果表明,高压、高转速条件下,柱塞副处于倾斜偏心状态,实际泄漏流量与通常理论假设的完全同心流场相比流量脉动量变大,而平均流量变小。The mathematic model on the leaking flow field of the piston sector considering the high press and high velocity in the piston pump was established, and the numerical simulation and analysis were done. At first, the 3-D dynamic analysis on the piston sector was done and the force change principle of the piston sector was analyzed in the Matlab program. Then, the theoretical mathematic model about the flow field in the piston sector with the acentric and inclined armillary seam was built based on two parameters： the inclined angle φ and the acentric distance e. These two parameters φ and e were numerically solved with the theory of dynamic pressure supporting and the result of the dynamic analysis on the piston sector. The numerical analysis on the leaking flow field in the piston sector with the acentric and inclined armillary seam was done in the Matlab program with the method of 1-D searching in some conditions. At last, the simulation was done with Fluent and the experimentation was conducted. The computing and analysis results indicate that the armillary seam in the piston sector is acentric and inclined considering the high press and high velocity, the change extent of the leaking flow rate in the piston sector is broader than which in the piston sector with the assumed homocentric armillary seam, but the average leaking flow rate is less in practice.

关 键 词：柱塞副 流场 泄漏 仿真 实验 

分 类 号：TH137.51[机械工程—机械制造及自动化]