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A platform for research: civil engineering, architecture and urbanism
Electric loader hydraulic system and hydraulic motor control method
The invention discloses an electric loader hydraulic system and a hydraulic motor control method, which are characterized in that a hydraulic energy accumulator and a pressure sensor are arranged on an oil way, leading to a steering system and a working device, of a hydraulic pump in the system, and a multi-way reversing valve without neutral-position oil return is arranged and is in control connection with the working device. Then the hydraulic motor is controlled according to the two working conditions that the working device does not act and acts, the motor is controlled according to a certain rotating speed or torque by arranging the energy accumulator and controlling the pressure threshold value of the hydraulic system, and it is guaranteed that when the working device does not act, the efficiency of the hydraulic pump is the highest; the system does not have pressure loss along the way caused by overflow and middle-position oil return, and when a working device acts, overflow and inter-valve pressure loss caused by large pressure, small flow and limiting of the working device are avoided.
本发明公开了一种电动装载机液压系统及液压电机控制方法，是在系统中液压泵通往转向系统和工作装置的油路上安装了液压蓄能器和压力传感器，并且设置一无中位回油的多路换向阀，控制连接工作装置。然后液压电机按工作装置未动作和有动作两种工况进行控制，通过蓄能器的设置和对液压系统压力门限值的控制，令电机按某种转速控制或转矩控制，保证了在工作装置不动作时，液压泵的效率最高，系统没有溢流和中位回油造成的沿程压力损失，在工作装置有动作时，避免了在大压力小流量和因工作装置限位引起的溢流和阀间压力损失。
Electric loader hydraulic system and hydraulic motor control method
The invention discloses an electric loader hydraulic system and a hydraulic motor control method, which are characterized in that a hydraulic energy accumulator and a pressure sensor are arranged on an oil way, leading to a steering system and a working device, of a hydraulic pump in the system, and a multi-way reversing valve without neutral-position oil return is arranged and is in control connection with the working device. Then the hydraulic motor is controlled according to the two working conditions that the working device does not act and acts, the motor is controlled according to a certain rotating speed or torque by arranging the energy accumulator and controlling the pressure threshold value of the hydraulic system, and it is guaranteed that when the working device does not act, the efficiency of the hydraulic pump is the highest; the system does not have pressure loss along the way caused by overflow and middle-position oil return, and when a working device acts, overflow and inter-valve pressure loss caused by large pressure, small flow and limiting of the working device are avoided.
本发明公开了一种电动装载机液压系统及液压电机控制方法，是在系统中液压泵通往转向系统和工作装置的油路上安装了液压蓄能器和压力传感器，并且设置一无中位回油的多路换向阀，控制连接工作装置。然后液压电机按工作装置未动作和有动作两种工况进行控制，通过蓄能器的设置和对液压系统压力门限值的控制，令电机按某种转速控制或转矩控制，保证了在工作装置不动作时，液压泵的效率最高，系统没有溢流和中位回油造成的沿程压力损失，在工作装置有动作时，避免了在大压力小流量和因工作装置限位引起的溢流和阀间压力损失。
Electric loader hydraulic system and hydraulic motor control method
一种电动装载机液压系统及液压电机控制方法
HAN YUNWU (author) / LIU PENG (author) / SUN CAIFENG (author) / ZHANG ZIRUI (author)
2023-04-18
Patent
Electronic Resource
Chinese
IPC:
E02F
Baggern
,
DREDGING
Electric loader hydraulic system and control method thereof
| European Patent Office | 2024
| European Patent Office | 2020