The invention discloses a pump-controlled hydraulic system standby pressure control system, a crane and a pressure control method. The pump-controlled hydraulic system standby pressure control system comprises an electric proportioning pump, a reversing valve, a three-way flow valve, a pressure detection unit, a control unit and a control unit. Through dual adjustment of hydraulic pressure and control, the hydraulic system can be automatically maintained in a standby state and kept in a set pressure state when the crane is in a standby state only by detecting the pressure at one position of an oil outlet of the pump, and when a handle is operated, the system can rapidly build pressure and improve the operation responsiveness of the system; the standby pressure is reasonably controlled, the standby pressure of the pump control crane is controlled within a reasonable range by using fewer sensors, the standby pressure of a system cannot be changed due to the pressure change of a load port, and the problems of starting impact and energy waste can be avoided.
本发明公开了一种泵控液压系统待机压力控制系统、起重机和压力控制方法,包括电比例泵、换向阀、三通流量阀、压力检测单元、控制单元以及操控单元;通过液压和控制双重调节,仅需泵出油口一处压力检测,即可使起重机处于待机状态时,液压系统自动维持在一种待命状态,保持系统处于设定压力状态,当有手柄操作时,系统能够快速建压,提升系统操作响应性,同时,对待机压力进行合理地控制,使用较少的传感器将泵控起重机待机压力控制在合理范围,不会因负载口压力变化而导致系统待机压力变化,能够避免了启动冲击和能量浪费的问题。
Pump control hydraulic system standby pressure control system, crane and pressure control method
泵控液压系统待机压力控制系统,起重机和压力控制方法
2024-04-16
Patent
Electronic Resource
Chinese
IPC: | B66C Krane , CRANES |