柱塞泵配流结构与流动特性的动态响应关系

Dynamic Response Relationship Between Swashplate’s Structural Parameters of Piston Pump and Hydrodynamics Features

摘要:

以典型的斜盘式轴向柱塞泵为对象,为了降低柱塞泵工作过程中的压力冲击与倒灌回流,利用计算流体动力学方法,对柱塞泵吸排油过程进行动态模拟,可视化地解析了配流盘三角槽结构对冲击与回流特性的影响.针对配流盘局部结构建立参数化模型,借助于计算流体动力学的解析、试验设计、近似模型技术,对柱塞泵动态解析过程进行一体化集成;以2阶响应面函数的形式,表达动态过程中柱塞腔内压力、回流峰值与配流盘三角槽跨度、深度的响应面模型;最后,对三角槽结构参数进行优化设计,为斜盘式轴向柱塞泵降噪型配流盘的设计，提供再设计的理论依据.

Abstract:

The paper deals mainly with the Swashplate axial piston pump.Based on a simulation of the discharging and sucking of piston pump by computational fluid dynamics method(CFD),an analysis was made of the impact of the triangular groove structure on the shock and reversed flow properties to reduce the pressure shock and reversed flow of a working swashplate piston pump.An integration method,which integrated parametric modeling, CFD analysising, optimization algorithm, experimental design and approximation model in one whole redesign system, was adopted to optimize the triangular groove structure.The response surface fuction of pressure shock and flow fluctuation by valve plate triangular groove structure was acquired. Finally, an optimal structure size was obtained based on the response surface model.