摘要
为了降低工程机械中的功率损失,提出一种新的变排量对置柱塞泵。该泵在传统单柱塞泵的基础上增加了一个柱塞,两柱塞对称布置,既减弱了压力波动、消除了单柱塞泵的不平衡力,又可通过调节柱塞相位差实现变排量。采用等效建模法建立并验证了变排量对置柱塞泵的AMESim模型。将该泵与传统柱塞泵的配流阀滞后时间进行了比较,发现存在滞后现象但滞后时间相对较短,导致泵性能下降,故对比分析了进油阀不同参数对配流阀滞后的影响规律,并采用正交法优化了参数。结果表明:进油阀参数均对进油阀关闭滞后时间有较大影响,进油阀关闭滞后时间随弹簧刚度、弹簧预紧力、阀芯直径的增加分别缩短了10.9、10.72、1.73 ms,而随阀芯质量的增加延长了5.7 ms;参数归一化后得到进油阀关闭滞后时间随弹簧刚度、弹簧预紧力、阀芯直径的增加分别缩短了61.6%、84.1%、8.9%,随阀芯质量的增加而延长了37.1%;正交优化后仿真模型的进油阀关闭滞后时间缩短了81.43%,有效降低了回流损失,提高了泵的性能。
In order to reduce the power losses in construction machinery,a novel variable displacement opposed piston pump is proposed.The pump adds a piston on the basis of the traditional single-plunger pump,and the two pistons are arranged symmetrically,which not only attenuates the pressure fluctuation and eliminates the unbalance force of the single-plunger pump,but also realises variable displacement by adjusting the phase diference of the pistons.An AMESim model of the pump is developed and calibrated via equivalent modeling.The lag time of the distribution valve of this pump is compared with that of the traditional piston pump,and it is found that the lag time is relatively less,but there still exists a lag phenomenon,which led to a decrease in the performance of the pump,so the influence of different parameters of the inlet valve on the lag time of the distribution valve is comparatively analysed and the parameters are optimized using the orthogonal method.The results show that:the inlet valve parameters all have a greater impact on the inlet valve closing lag time, which is manifested as with the increase ofspring stiffness, spring preload, spool diameter, respectively, the closing lag time is decreased by 10.9, 10. 72,1.73 ms, and is increased by 5.7 ms with the increase of spool mass;after parameter normalisation, the closinglag time of the outlet valve is decreased by 61.6% , 84. 1% , and 8.9% with the increase of spring stiffness, springpreload, and spool diameter, respectively, with the increase of spool mass increasing by 37. 1% . After orthogonaloptimisation, the lag time of the outlet valve closure of the simulation model is decreased by 81. 43% , whicheffectively reduces the return loss and improves the performance of the pump.
作者
贾晨
原霞
何超
杨伟
陈燕
李正禄
JIA Chen;YUAN Xia;HE Chao;YANG Wei;CHEN Yan;LI Zhenglu(School of Mechanical Engineering,North University of China,Taiyuan 030051;Chongqing Aerospace Rocket Electronic Technology Co.,Ltd.,Chongqing 400039;School of Energy and Power Engineering,North University of China,Taiyuan 030051;A Military Representative Office of the Military Representative Bureau of the Army Equipment Department in Beijing Area,Taiyuan 030009)
出处
《液压与气动》
北大核心
2025年第7期98-106,共9页
Chinese Hydraulics & Pneumatics
基金
山西省基础研究计划资助项目(202103021224216)。
关键词
对置柱塞泵
进油阀
响应特性
参数优化
opposed piston pump
inlet valve
response characteristics
parameter optimisation
