新型十字摆盘驱动式水液压轴向柱塞泵阀配流系统设计

针对一种新型十字摆盘驱动式水液压轴向柱塞泵的配流阀系统结构参数与泵转速、柱塞直径不匹配导致的容积效率不足的问题,搭建了该新型泵的ADAMS-AMESim固液耦合仿真模型。在额定转速下,分析了配流阀阀芯质量、弹簧刚度、弹簧预紧力、阀芯球面直径对其容积效率的影响,并对其配流系统进行优化设计。结果表明:新型泵的容积效率随着配流阀弹簧刚度、预紧力的增加而增加,随着配流阀阀芯质量、阀芯球面直径的增加而减少,且吸液阀结构参数的变化对容积效率影响大于排液阀。因此,在设计新型泵的配流阀时可适当提高阀芯复位弹簧刚度和预紧力,适当减小阀芯质量和阀芯球面直径,以提高新型泵的容积效率。

Design of Check Valve System to the New Water Hydraulic Axial Piston Pump Driven by Cross Wobble Plate

In order to solve the problem of insufficient volumetric efficiency caused by the mismatch between the structural parameters of the check valve system of a new type of water hydraulic axial piston pump driven by a cross wobble plate and the pump speed and the diameter of the plunger, the ADAMS-AMESim solid-liquid coupling simulation model of the hydraulic pump is built. At the rated speed of the new pump, the influence of the check valve core mass, spring stiffness, spring preload and the spherical diameter of the valve core on the volumetric efficiency of the new pump is analyzed. And its check valve system is optimized. The results show that the volumetric efficiency of the new pump increases with the increase of the spring stiffness and preload of the check valve, and decreases with the increase of the mass and the spherical radius of the valve core. And, the influence of the structural parameters of the inlet valve on the volumetric efficiency is greater than that of the outlet valve. Therefore, in the design of the check valve system, the stiffness and preload of the spring of the check valve should be properly increased, the mass of the valve core and the spherical diameter of the valve core should be appropriately reduced, so as to improve the volumetric efficiency of the pump.