定流网络二次调节液压系统

提出一种新结构的二次调节液压系统,将传统定压网络二次调节系统中各变量马达的输入和输出端相互串联后接到定量泵的两端,使得通过各变量马达的流量基本上等于泵的输出流量,从而构成了定流网络二次调节系统。在此基础上,提出了可大幅提高该系统低速性能的高速开关型定流网络二次调节系统结构,并进行了相应的理论分析和仿真研究。结果表明,定流网络二次调节系统保持了定压网络二次调节系统的高效率、能量可回收等优点,且大幅简化了系统结构,最大限度地降低了节流损失,达到最佳节能效果。

SECONDARY REGULATION HYDRAULIC SYSTEM BASED ON FIXED FLOW-RATE NET

A new secondary regulation hydraulic system is introduced, in which the entrances and exports of variable-displacement motors in traditional secondary regulation system based on fixed-pressure net are serially connected. A fixed displacement pump is applied as the oil supply, so that the flow-rate through each variable-displacement motor equals to the output flow-rate of pump approximately. In this way, a secondary regulation system based on fixed flow-rate net is composed of. Based on this, the structure of high-speed switchmode secondary regulation system based on fixed flow-rate net, which could enhance its low-speed characteristic, is put forward. Corresponding theoretical analysis and simulations show that the virtues in traditional secondary regulation system based on fixed-pressure net such as high efficiency and energy reclamation are inherited, and the structure is simplified remarkably. The throttle lost is decreased considerably, and the energy saving efficiency is optimal.