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中文摘要：
采用液压泵按闭式回路方法驱动液压缸,是电液控制技术领域的研究热点,这一技术在对称液压缸的控制中已获得很好应用,但对于广泛采用的差动缸,效果一直不尽如人意。为此,依据阀控缸技术中非对称阀控非对称缸的思想,提出采用三配流窗口轴向柱塞泵直接闭式驱动差动缸运动的原理,方案是改造现有轴向柱塞泵的吸油窗口为并联布置的两个窗口,增加一个柱塞,将普遍采用的9柱塞泵改为10个柱塞,并分成两组,使每一组柱塞的吸排油窗口在半径方向错开位置,分别对应配流盘上的二个配流窗口。研究工作中,在SimulationX软件环境下,建立考虑单个柱塞运动特征和配流面积随转角变化的液压泵仿真模型,通过数字仿真确定了泵的关键参数,特别是缸体和配流盘卸荷槽的尺寸,设计并制造了样机,在试验台上对多种转速下泵的压力、流量和噪声等基本特性进行测试,验证了原理的正确性。
英文摘要：
The adoption of hydraulic pump to drive the hydraulic cylinders in closed circuit is a research hotspot in the field of current electro-hydraulic control technology.This technology is well applied in the control of symmetric cylinders,yet the effect is not that satisfactory for widely used differential cylinders.Therefore,the principle of adopting three assignment windows axial piston pump to directly drive the differential cylinder in closed circuit is proposed according to the concept of asymmetrical cylinder controlled with asymmetrical valve technology.The scheme is to transform the oil suction window of the existing axial piston pump into two parallel windows.When in use,a piston is added to the universally adopted 9-piston pump,then the 10 pistons are separated into two groups,the oil suction and discharge windows of each group are in the staggered position in the radial direction and are respectively corresponding to the two assignment windows in the valve plate.With the software SimulationX,a hydraulic pump simulation model,which takes into consideration the single piston motion characteristics and the change of assignment area with the rotary angle,is established.The pump key parameters,especially the sizes of the cylinder body and the unloading groove of the valve plate,are determined through digital simulation.Then the prototype pump is designed and made.The basic characteristics such as pressure,flow and noise of the pump at different rotation speeds are tested,thus verifying the correctness of the principle.
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