旋耕机电液负载敏感系统能耗分析

针对液压旋耕机工作装置设计一套电液式定量泵负载敏感系统，相比较传统定流量负载敏感系统，采用永磁同步电机与定量泵结合替换三通压力补偿阀。给出液压系统原理图及系统控制框图，并搭建数学模型分析其控制策略，通过AMESim搭建系统仿真模型，仿真分析旋耕机工作装置各执行机构单独工作、复合动作时的功率曲线与能量曲线，分析系统的能耗情况。结果表明：该系统通过永磁同步电机动态地调节定量泵输出的流量，使定量泵输出功率跟随负载变化，从而减少系统的溢流损失，增加了旋耕机工作装置的能量利用率，提高系统的节能效果。

Analysis of Energy Consumption of Electro-Hydraulic Load Sensing System of Rotary Tiller

The quantitative pump electro-hydraulic load sensing system was designed for the working device of hydraulic rotary tiller. Compared with traditional constant flow load sensing system, the combination of permanent magnet synchronous motor and quantitative pump was used to replace the three-way pressure compensation valve. The schematic diagram of hydraulic system and the control block diagram of the system were given, and the mathematical model was built to analyze its control strategy. The system simulation model was built through AMESim to simulate and analyze the power curves and energy curves of each actuator of the rotary tiller working device to work alone and compound action, so as to analyze the energy consumption of the system. The results show that the system dynamically adjusts the output flow of the quantitative pump through the permanent magnet synchronous motor; the output power of the quantitative pump changes with the load, so as to reduce the overflow loss of the system, increase the energy utilization rate of the working device of the rotary tiller, and improve the energy-saving effect of the system.