基于Pumplinx的斜盘式轴向柱塞泵缸体优化分析

Optimization Analysis on the Cylinder of Swashplate Axial Piston Pump Based on Pumplinx

柱塞泵是工程机械液压系统中十分重要的动力元件,依靠柱塞在缸体孔内做往复运动时产生的容积变化进行吸油和压油。斜盘式轴向柱塞泵的缸体一般呈柱形,其柱塞中心线平行于缸体的轴线。这种结构在同等流量输出下,缸体的体积会较大。该文以斜盘式轴向柱塞泵为例,对泵的局部结构进行改进。主要是对缸体进行了优化设计,从原先的直缸直腰式柱形缸变为斜缸斜腰式锥形缸体,以及将常用的滑靴包覆柱塞的结构形式改为柱塞包覆滑靴的结构形式等.在泵体相同体积大小的情况下,轴向柱塞泵的流量特性和自吸性能得到提高。运用泵专用软件pumplinx进行仿真对比缸体结构中斜缸斜腰角度,得出使柱塞泵整体性能最佳的组合。并通过建立斜盘式轴向柱塞泵的锥形缸体结构数学模型,根据缸体结构参数的调整与组合,得出满足工况使用要求,并达到缸体刚度与强度等条件的锥形缸体泵模型。研究结果对柱塞泵的结构设计有一定的参考价值。

Plunger pump is the important component in the hydraulic system of construction machinery,which relies on the volume change of in the cylinder bore for reciprocating motion of pistons to absorb oil and carry out oil.The cylinder of Swashplate axial piston pump is generally cylindrical, its center line of plunger parallels to the axis of the cylinder.In the same flow output, the volume of the cylinder of This structure will be larger.In this paper, partial structure of the pump is improved by taking the swashplate axial piston pump as an example.It mainly optimizes the design of the cylinder, with the original straight cylinder straight waist cylindrical cylinder turning oblique cylinder inclined waist conical cylinder, it also turns common slipper coated plunger structure form to plunger coated slide shoe structure form.When the volume of the pump body is same, the flow characteristics and self suction performance of axial piston pump are improved.Using thepump specific software pumplinx to simulate with contrasting the oblique cylinder angles of the cylinder block structure,obtains the combination with the best overall performance of the plunger pump.Through establishing mathematical model of the swashplate axial piston pump of cylinder structure,companying with the adjustment and combination of parameters of the cylinder structure, it comes to the tapered cylinder pump model which meets the working requirements and achieves cylinder stiffness and strength. The result of the research has certain reference value for the design of the plunger pump structure.