双联轴向柱塞泵动态特性及功能复合分析  

Dynamic Characteristics and Functional Complex Analysis of Double Axial Piston Pumps

作　　者：付丽丽 刘志奇[1] 陈伟敬 仉志强[1] 赵立全 FU Lili;LIU Zhiqi;CHEN Weijing;ZHANG Zhiqiang;ZHAO Liquan(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan,Shanxi 030024;Taiyuan Heavy Machinery Group Yuci Hydraulic Industry Co.,Ltd.,Jinzhong,Shanxi 030600)

机构地区：[1]太原科技大学机械工程学院,山西太原030024 [2]太重集团榆次液压工业有限公司,山西晋中030600

出　　处：《液压与气动》2024年第8期104-111,共8页Chinese Hydraulics & Pneumatics

基　　金：山西省重点研发计划(20210215040100);山西省基础研究计划联合资助(太重)重点项目(20230301121006)。

摘　　要：针对数字式变排量双联轴向柱塞泵功率分配及复合控制模式切换的难题,首先,依据其机液伺服变量原理建立了变量机构的数学模型,分析了泵频响的影响因素。其次,建立了双联轴向柱塞泵的改进交叉功率控制、负载敏感控制、压力切断控制的数学模型,并通过仿真分析验证了改进交叉功率的有效性。在此基础上,提出了基于控制信号最小值的功率、流量、压力复合控制策略。最后,基于AMESim仿真平台建立了双泵系统的机液仿真模型,结果表明:增加阀流量系数、阀芯端面面积,减小弹簧刚度、变量柱塞面积以及斜盘摆动半径可提高变量泵的频响;改进的交叉功率控制策略使泵的变量工作区扩大了约15%,增加了电动机功率在双泵间的分配范围。In response to the difficulty of power distribution and composite control mode switching for the digital variable displacement double axial piston pumps,initially,a mathematical model of the variable mechanism is established,based on its mechanical-hydraulic servo variable principle,and an analysis of the factors influencing the pump frequency response is conducted.Subsequently,mathematical models for modified cross-power control,load-sensitive control,and pressure cut-off control of the double axial piston pumps are formulated.The efficacy of the modified cross-power control is validated by simulation analysis.On this basis,a composite control strategy integrating power,flow,and pressure control,based on the minimum value of the control signal,is proposed.Finally,a mechanical-hydraulic simulation model of the double-pump system is constructed using the AMESim platform.The results confirm that increasing the valve flow coefficient,spool end face area,decreasing the spring stiffness,variable plunger area,and swashplate swing radius could improve the frequency response of the variable pump.Furthermore,the modified cross-power control strategy is shown to expand the variable working area of the pump by approximately 15% and augment the range of electric motor power distribution among the double pumps.

关 键 词：双联轴向柱塞泵 动态特性 功能复合 

分 类 号：TH137[机械工程—机械制造及自动化]