研制了一种双斜盘阀配流轴向柱塞式液压电机泵的样机，并阐述了一种依靠改变左右斜盘相对位置角度关系来实现液压泵排量改变的变量方式。研究表明：样机技术指标达到了额定压力20 MPa，输出流量298 mL/min，容积效率达到96%，并验证了新变量方式的可行性和具有余弦规律的变量特性。实验也证明了适当增大吸入阀弹簧预压紧力以抵消配流阀旋转时所受的离心力，与在吸入阀的前腔设计简易的离心增压装置以利用液体离心力等方式是可行的，不仅使得泵在中速（750~1200 r/min）时可保持较好的排量，而且在高速(1200~1500 r/min)时排量降低不显著。
Abstract
A prototype of doubleswashplate axial piston hydraulic electric motor pump with port valves is manufactured. And we describe a method of changing the displacement of hydraulic pump by changing the angular relationship between relative positions of left and right swash plates. The experimental results show that pressure can reach the rated value 20 MPa, and the output flow rate is 298 mL/min, and the volumetric efficiency is 96%. The results also verify that the new variable method is viable and has variable characteristics with cosine law. In addition, the experiment proves that it is feasible to appropriately increase the preload force of inlet valve spring to counteract the centrifugal force when valves rotate. And it is also feasible to design a simple centrifugal booster device installed in front of inlet valves to take advantage of the liquid centrifugal force. These two measures not only ensure that the pump maintains enough displacement at medium speed (750~1200 r/min), but also contribute to slight reduction of displacement at highspeed (1200~1500 r/min).
关键词
双斜盘；阀配流；变量泵；柱塞泵；液压电机泵
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Key words
doubleswashplate, port valve, variable pump, piston pump, hydraulic electric motor pump
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