基于缸体腰形孔的柱塞腔抗空化结构的优化

Optimization of Plunger Cavity Cavitation Based on Cylinder Block Kidney Shape Hole

为从结构上找到抑制液压元件空化的方法,从理论上分析了轴向柱塞泵缸体腰形孔结构对柱塞腔自吸力的影响,并通过Fluent软件对柱塞腔空化进行仿真分析.在Kriging插值原理基础上,建立了以缸体腰形孔结构参数为自变量及柱塞气体体积分数为目标函数值的代理模型,并通过杂交粒子群算法优化代理模型,得到缸体腰形孔优化结构,为解决柱塞泵结构参数的强耦合关系问题提供了新的方法.综合以上的分析,得到能最大限度抑制柱塞腔空化的柱塞泵缸体腰形孔及配流盘节流槽结构及其参数,通过仿真分析发现该结构具有很强的对柱塞腔空化的抑制性.

In order to find a way to restrain the cavitation of hydraulic components from the structure, the influence of the axial piston pump cylinder kidney shape hole structure on the self suction of the plunger cavity is theoretically analyzed, and the plunger cavity cavitation is simulated by using the Fluent software. Then, based on the princi- ple of the Kriging interpolation, an agent model is constructed by taking the structure parameters of the cylinder kidney shape hole as the independent variable and the gas volume fraction of the plunger cavity as the objective function value. Moreover, the constructed agent model is optimized by using the cross breeding particle swarm al- gorithm, thus obtaining the optimized structure of the cylinder kidney shape hole, which provides a new method to overcome the strong coupling relationship between the structure parameters of the axial piston pump. According to the above analysis, the structure and parameters of the cylinder kidney shape hole and the valve plate groove of the axial piston pump, which can maximize the inhibition of the plunger cavity cavitation, are obtained. Simulation re- sults demonstrate that the obtained structure can significantly inhibit the plunger cavity cavitation.