According to the electrically-controlled hydraulic steering system and the crane, the oil pressure applied to the two ends of a valve element of a proportional valve is changed by changing the current of a hydraulic proportional pilot control proportional valve coil, and the valve element of the proportional valve is pushed to move through the oil pressure; the two modes of post-valve feedback and post-pump feedback are parallel, so that the response characteristic of the system is increased, the response time is shortened, and the feedback reliability is improved; the displacement sensor is additionally arranged in the proportional valve to monitor the displacement of the valve element of the proportional valve, the flow of the proportional valve is controlled by controlling the position of the valve element of the proportional valve, the control precision of the proportional valve is higher, the control method of the proportional valve can adopt valve element displacement feedback control or coil current feedback control, and the proportional valve can adapt to different application occasions.
本发明提出了一种电控液压转向系统及起重机,通过改变液压比例先导控制比例阀线圈的电流来改变施加到比例阀阀芯两端的油压,通过油压推动比例阀阀芯移动;通过阀后反馈和泵后反馈两种方式并行,增加了系统的响应特性,减少了响应时间,提高了反馈的可靠性;通过在比例阀中增加位移传感器来监测比例阀阀芯的位移,通过控制比例阀阀芯的位置来控制比例阀的流量,使比例阀的控制精度更高,以及采用比例阀控制方法可采用阀芯位移反馈控制或线圈电流反馈控制,可应对不同适用场合。
Electric control hydraulic steering system and crane
一种电控液压转向系统及起重机
08.08.2023
Patent
Elektronische Ressource
Chinesisch
IPC: | B62D MOTOR VEHICLES , Motorfahrzeuge |
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