The invention provides a hydraulic flow control system and method and a crane, and relates to the technical field of hydraulic control, the system comprises a variable pump, execution mechanisms, control valves, handles and a controller, the multiple execution mechanisms are connected with the variable pump through the multiple control valves respectively, the multiple handles are used for being associated with the multiple execution mechanisms respectively, and the controller is connected with the multiple handles. The opening degree of the handle is positively correlated with the flow required by the corresponding executing mechanism; and when the single-action mode is selected, the controller controls the opening degree of the valve port of the corresponding control valve to be fully open, and controls the corresponding handle to be associated with the corresponding executing mechanism. When the combined action mode is switched into the single action mode, the controller can directly calculate the flow required by the executing mechanism through the opening degree of the handle, and finally control current of the variable pump is controlled to adjust the flow matched with the variable pump, namely the flow of the variable pump is directly controlled through the opening degree of the handle. The flow required by the single-action actuating mechanism is not required to be calculated through the opening degree of the valve port of the control valve, and quick response of the system is realized.
本发明提供了一种液压流量控制系统及方法、起重机,涉及液压控制技术领域,系统包括变量泵、执行机构、控制阀、手柄和控制器,多个执行机构分别通过多个控制阀与变量泵连接,多个手柄用于分别与多个执行机构相关联,以使手柄的开度与对应执行机构的所需流量正相关;当选择单动作模式时,控制器控制对应的控制阀的阀口开度为全开,且控制对应的手柄与对应的执行机构相关联。在由组合动作模式切换为单动作模式时,控制器能够通过手柄的开度直接计算得知执行机构的所需流量,最终控制变量泵的控制电流以调节变量泵匹配的流量,即实现由手柄开度直接控制变量泵流量,省去了通过控制阀阀口开度计算单动作执行机构的所需流量,实现系统快速响应。
Hydraulic flow control system and method and crane
一种液压流量控制系统及方法、起重机
2022-12-16
Patent
Electronic Resource
Chinese