Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumulator based on constant work-point control is put forward. A simulating experimental system of hyb...Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumulator based on constant work-point control is put forward. A simulating experimental system of hybrid construction machinery is established, and experimental study on constant work-point control for parallel hybrid system with capacitor accumulator is carried out using the pressure and flow rate derived from boom cylinder of hydraulic excavator in actual work as the simulating loads. A program of double work-point control is proposed and proved by further experiments.展开更多
To improve the energy efficiency of a hydraulic boom, a new energy-saving system adopting a hydraulic accumulator is proposed. First, the principle of the system is presented. Then, the dynamic simulation is intro- du...To improve the energy efficiency of a hydraulic boom, a new energy-saving system adopting a hydraulic accumulator is proposed. First, the principle of the system is presented. Then, the dynamic simulation is intro- duced. Finally, the conclusions are given based on the analysis of simulation data. In Summary, the innovative energy-saving system combines flow regeneration and potential energy recovery, runs steadily and comfortably, saves energy remarkably and has good potential for improving energy utilization of a hydraulic excavator.展开更多
文摘Limitations of various accumulators in hybrid hydraulic excavator are analyzed. A program using capacitor as the accumulator based on constant work-point control is put forward. A simulating experimental system of hybrid construction machinery is established, and experimental study on constant work-point control for parallel hybrid system with capacitor accumulator is carried out using the pressure and flow rate derived from boom cylinder of hydraulic excavator in actual work as the simulating loads. A program of double work-point control is proposed and proved by further experiments.
文摘To improve the energy efficiency of a hydraulic boom, a new energy-saving system adopting a hydraulic accumulator is proposed. First, the principle of the system is presented. Then, the dynamic simulation is intro- duced. Finally, the conclusions are given based on the analysis of simulation data. In Summary, the innovative energy-saving system combines flow regeneration and potential energy recovery, runs steadily and comfortably, saves energy remarkably and has good potential for improving energy utilization of a hydraulic excavator.