The crane hydraulic winch load switching system comprises a hydraulic winch, a hydraulic motor for driving the hydraulic winch to rotate, a brake connected with the hydraulic motor, a winch valve group for controlling the hydraulic motor to rotate, a control valve group connected with the winch valve group, and an oil pump for conveying hydraulic oil from an oil tank to the control valve group, the load switching structure is connected with the winch valve group; the oil pump pumps hydraulic oil out of the oil tank and then enters the hydraulic motor through the control valve set and the winch valve set in sequence, the hydraulic motor is driven to rotate, and lifting of the hydraulic winch is achieved. The winch valve group comprises a motor electromagnetic valve connected with the hydraulic motor, and the load switching structure is connected with the motor electromagnetic valve. By arranging the load switching structure, the current of the motor electromagnetic valve is changed, and control over the rotating speed and torque of the hydraulic winch under different sea conditions is achieved.
一种起重机液压绞车负载切换系统包括液压绞车,驱动液压绞车转动的液压马达,与液压马达连接的制动器,控制液压马达转动的绞车阀组,与绞车阀组连接的控制阀组,将液压油从油箱输送至控制阀组的油泵,以及与绞车阀组连接的负载切换结构;油泵将液压油从油箱抽出后依次经过控制阀组和绞车阀组进入所述液压马达,驱动液压马达转动,实现液压绞车的升降;绞车阀组包括与液压马达连接的马达电磁阀,负载切换结构与马达电磁阀连接。本发明通过设置负载切换结构改变对马达电磁阀的电流大小,实现不同海况下对液压绞车转速和扭矩的控制。
Load switching system for hydraulic winch of crane
一种起重机液压绞车负载切换系统
2023-12-15
Patent
Electronic Resource
Chinese
Single-winch refitted double-winch system based on automobile hydraulic crane
European Patent Office | 2020
|Hydraulic speed regulation valve, hydraulic winch system and crane hydraulic system
European Patent Office | 2016
|Crane winch protection device, crane and crane winch protection method
European Patent Office | 2020
|