变排量对置柱塞泵流通特性研究

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关键词：对置柱塞泵；变排量；变相位；流通特性

中图分类号：TH322

DOI：10.3969/j.issn.1004-132X.2025.11.019

Abstract：To address the high power loss in fixed-displacement pumps used in construction machin ery，a variable-displacement opposed-piston pump was designed. The pump's AMESim simulation model was developed through equivalent modeling methodology. The model validity was experimentally verified through comprehensive bench testing. Experimental validation reveals a maximum 9.30% deviation between simulated and measured average flow rates，within acceptable limits when accounting for leakage and valve backflow efects.Using this validated simulation model，the flow characteristics of the variable displacement opposed piston pumps was investigated under varying rotational speeds， phase differences，and their coupled efects. The simulation results show that the pump flow and pressure increase with increasing speed and decrease with increasing phase difference. When the phase difference increases from 0∘ to 150∘ at rated speed，the average flow rate decreases by 74.00% ，the maximum instantaneous pressure droppes by 88.87% . These results demonstrate that the pumps have a wide range of flow，pressure adjustment. The pumps enable continuous output flow regulation through coordinated speed and phase diference adjustment，establishing a theoretical foundation for variable displacement pump control strategies.

Key words： opposed piston pump； variable displacement;variable phase; flow characteristic

0 引言

随着工程机械保有量的持续增长[]，工程机械排放物增加，加剧了能源消耗和环境污染[2]，为响应双碳政策，工程机械正朝着减少碳排放和提高能效的方向发展[3-4]。（剩余10610字）