Simulation of energy-saving control strategy for independent metering electro-hydraulic system based on hydranlic-resistance full-bridge network
To address issues such as high throttle loss,high energy consumption,and low efficiency in traditional electro-hydraulic control systems,a novel electro-hydraulic control system characterized by independent metering is introduced in this study. This system incorporates a full-bridge hydraulic resistance network,and its energy-saving control strategy is extensively investigated under typical four-quadrant load. Comprising five two-position two-way proportional valves,the hydraulic-resistance full-bridge electro-hydraulic system is categorized into three control modes:a traditional three-position four-way control mode,an independent metering control mode,and a load sensitive control mode. In the traditional mode,the opening control of the two load ports mimics three-position and four-way inlet and outlet coupling. In the independent metering mode,one cavity regulates the flow,while the other cavity controls the full opening of the valve port. The load-sensitive mode ensures a fixed pump outlet pressure higher than the intake cavity pressure,achieving load-sensitive functionality. Additionally,a flow regeneration circuit is used for energy-saving control across all three modes. Results of combined simulation using AMESim+MAT2 show that compared with the traditional three-position four-way valve mode,the three-position four-way flow regeneration mode,the independent metering flow regeneration mode,and the load sensitive mode can achieve energy savings of 43.38％,65.27％,77.91％ and 83.58％,respectively.
万方数据
维普
