数字型液压变压器结构设计与压变特性研究  

Structural Design and Pressure Change Characteristics of Digital Hydraulic Transformer

作　　者：张祝新 李伟建 刘涛[1,2] 赵丁选[1,2] 孙仁福 韩炎 ZHANG Zhuxin;LI Weijian;LIU Tao;ZHAO Dingxuan;SUN Renfu;HAN Yan(College of Mechanical Engineering,Yanshan University,Qinhuangdao 066004,China;Hebei Key Laboratory of Special Delivery Equipment,Yanshan University,Qinhuangdao 066004,China;Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]燕山大学机械工程学院,秦皇岛066004 [2]燕山大学河北省特种运载装备重点实验室,秦皇岛066004 [3]燕山大学河北省重型机械流体动力传输与控制实验室,秦皇岛066004

出　　处：《农业机械学报》2020年第3期402-409,共8页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家重点研发计划项目(2016YFC0802900);河北省自然科学基金钢铁联合研究基金项目(E2017203079)。

摘　　要：通过采用多个齿轮泵/马达单元和控制阀组等基础元件,设计了一种数字型液压变压器。数字型液压变压器具有数字元件的离散、简单和易控等特性,将多个不同排量的齿轮泵/马达单元进行组合,各个齿轮泵/马达之间同轴连接,每个齿轮泵/马达单元的进口、出口分别安装有电磁开关阀,采用节流阀模拟数字型液压变压器负载,通过控制齿轮泵/马达单元进口、出口控制阀组的得失电状态,实现数字型液压变压器变压比根据二进制数字控制而变化的目标。利用AMESim仿真软件对数字型液压变压器的变压过程进行仿真分析,基于试验平台对数字型液压变压器进行了验证。结果表明,所提出的数字型液压变压器可以通过数字控制进行变压,验证了其变压原理的可行性。A new type of digital hydraulic transformer was designed by using several basic components such as gear pump/motor units and control valve groups.The digital hydraulic transformer combined the discrete,simple and easy to control characteristics of digital components,and was grouped by a plurality of gear pump/motor units with different displacements.Rigid connection was made between the drive gear shaft of each gear pump/motor to achieve the purpose of synchronous rotation.Solenoid switch valves were installed respectively through the integrated valve blocks at the inlet and outlet of each gear pump/motor unit,throttle valve was installed in the output port of the digital hydraulic transformer to simulate the load of the whole hydraulic system,the low pressure ports of the inlet and outlet control valve groups were connected together to access the oil tank.According to the binary digital control by changing the power on/off state of the inlet and outlet valve groups,the digital hydraulic transformer can realize the change of output flow due to the existence of low pressure oil port,and then realized the change of output pressure.The AMESim simulation software was used to analyze the pressure change process of the digital hydraulic transformer,and the digital hydraulic transformer was verified by using the test platform.The results showed that the proposed digital hydraulic transformer can change the output pressure by digital control,and the feasibility of the pressure change principle was determined.

关 键 词：液压变压器 数字液压 流量控制 二次调节 恒压网络 

分 类 号：TH137[机械工程—机械制造及自动化]