一种面向多负载的高效液压动力单元  

High-efficiency Hydraulic Power Unit for Multi-load System

作　　者：刘志广 施光林[1] 

机构地区：[1]上海交通大学机械与动力工程学院

出　　处：《机电一体化》2019年第1期16-21,共6页Mechatronics

基　　金：“高档数控机床与基础制造装备”科技重大专项(2017ZX04016001)

摘　　要：对于具有多负载,且负载压力和流量差异较大的液压系统,传统的液压动力单元一般由单液压泵、溢流阀和多个减压阀构成,并且按照最大压力和最大流量来配置,因此导致较大的节流、溢流损失。针对这一问题提出了一种面向多负载的高效液压动力单元,它由多个小功率的伺服电机直驱液压泵与安全阀、单向阀等构成,能够分别向不同负载提供相适应的压力、流量的液压油,确保液压动力单元的输出功率接近负载消耗功率。分析了不同工况下新型液压动力单元的理论效率;基于AMESim,MATLAB软件搭建了高效液压动力单元的仿真模型;建立了面向多负载的高效液压动力单元的控制策略并进行了仿真分析;最终证明了所提出的面向多负载的液压动力单元是可行和高效节能的。For hydraulic systems with multiple loads, a traditional hydraulic power unit mostly contains one fixed-displacement hydraulic pump and multiple reduction valves. The system will configure the pressure and flow rate depending on the maximum situation. Therefore, it brings low efficiency if there is large difference about between different working conditions. To solve this problem, this paper proposes a highefficiency hydraulic power unit for multi-load. This kind of power unit contains multiple low-power hydraulic pumps driven by servomotors, safety valves, one-way valves and other components. It provides different pressure levels and flow rate levels of hydraulic oils according to the load requirements of different actuators. This paper analyses the theory efficiency of high-efficiency hydraulic power unit under different working condition. Based on AMESim and MATLAB software, this paper proposes a simulation model of multi-load hydraulic control system for multi-load energy-saving hydraulic power unit, establishes the control strategies for simulation analysis, and proves the energy-saving effect and feasibility.

关 键 词：多负载 节能 液压动力单元 伺服电机直驱液压泵 分布式供油 控制策略 

分 类 号：TH137[机械工程—机械制造及自动化]