The invention discloses a winch follow-up control hydraulic system. The winch follow-up control hydraulic system comprises a telescopic unit and a winch unit. When the multi-way reversing valve is operated to enable the arm support to stretch out, oil liquid from an oil port 1a of the telescopic joint reaches an oil port 1c of the arm support telescopic one-way balance valve and enters a rodless cavity of the arm support telescopic oil cylinder through the arm support telescopic one-way balance valve. Control oil flowing out of an oil port 1c of the boom telescopic one-way balance valve is used for enabling a motor working oil port 2h and a motor working oil port 2i of the winch motor to be communicated through the winch follow-up control valve; and moreover, oil liquid of an oil port 1c of the boom telescopic one-way balance valve flows to a brake oil port of the winch motor through an oil port 2q and an oil port 2p of the winch follow-up control valve, so that a motor brake of the winch motor is in an open state, and the winch mechanism descends along with stretching of the boom. According to the invention, when the arm body of the fire-fighting lorry-mounted crane extends out, the winch of the fire-fighting lorry-mounted crane can descend along with the extension of the arm body.
本发明公开了一种卷扬随动控制液压系统,包括伸缩联和卷扬联;当操纵多路换向阀使臂架伸出时,从伸缩联的1a油口出来的油液到达臂架伸缩单向平衡阀的1c油口,经臂架伸缩单向平衡阀进入臂架伸缩油缸无杆腔;臂架伸缩单向平衡阀的1c油口流出的控制油用于通过卷扬随动控制阀使卷扬马达的马达工作油口2h和马达工作油口2i连通;并且,所述臂架伸缩单向平衡阀1c油口的油液经卷扬随动控制阀的2q油口、2p油口流至卷扬马达的制动器油口,使卷扬马达的马达制动器处于打开状态,实现臂架伸出的同时使卷扬机构跟随下降。本发明实现消防随车起重机在臂体伸出时,其卷扬能够跟随臂体的伸出而下降。
Winding follow-up control hydraulic system
一种卷扬随动控制液压系统
2024-03-19
Patent
Electronic Resource
Chinese
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