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1. 发明申请

WO1984003084A1 EMERGENCY CONTROL HYDRAULIC SYSTEM FOR A CRANE 审中-公开
标题翻译：起重机应急控制液压系统
公开(公告)号：WO1984003084A1
公开(公告)日：1984-08-16
申请号：PCT/US1984000152
申请日：1984-02-03
申请人： CONTINENTAL EMSCO COMPANY
发明人： CONTINENTAL EMSCO COMPANY , FEATHERSTONE, William, A. , SHULTZ, Larry, D. , DOAN, Thomas, C.
IPC分类号： B66D05/02
CPC分类号： B66D1/44 , B66C23/90 , B66D5/26
摘要： A fluid control circuit wherein said fluid is preferably a hydraulic fluid or other similar fluid, as appropriate to the application, having a variety of emergency control safety features. The fluid control system is particularly adapted for use with lifting devices, especially cranes, for loading and unloading items to or from a moving platform. The system as described is typical of that which may be used on a crane having both a main hoist and an auxiliary or whip hoist both of which are used for independent and differing load applications. The control circuit is capable of automatically setting all of the load bearing brakes (46, 47) upon an electrical or/and hydraulic power failure. In addition, the control circuit provides a means (20) for an operator to release the auxiliary or whip hoist, which is the smaller load bearing hoist, in an emergency situation where the line or hook on the auxiliary or whip hoist line becomes caught on a moving object. A valve (60) senses the load induced flow from the whip hoist motor (45) and controls the output of the hoist pump (57). When operating in an emergency mode, the main hoist motor (44) or whip hoist motor (45) operates as a pump to provide fluid to drive a motor (25a). The motor (25a) drives a pump (25b) which supplies fluid to the hoist motors to prevent cavitation.
摘要翻译：一种流体控制电路，其中所述流体优选地是适用于应用的具有各种应急控制安全特征的液压流体或其它类似流体。流体控制系统特别适用于起重装置，特别是起重机，用于将物件装载到移动平台或从移动平台卸载物品。所描述的系统是典型的，其可以用于具有主起重机和辅助或起重机的起重机，这两个起重机都用于独立和不同的负载应用。控制电路能够在电或/和液压电源故障时自动设定所有的承载制动器（46,47）。此外，控制电路提供了一种用于操作者在紧急情况下释放作为较小负载提升机的辅助起重机的装置（20），其中辅助或鞭子提升线上的线或钩被卡住一个移动物体。阀（60）感测来自起重马达（45）的载荷感应流量并控制起重泵（57）的输出。当在紧急模式下操作时，主起重电动机（44）或曳引马达（45）作为泵工作以提供流体来驱动电动机（25a）。电动机（25a）驱动向起重电动机供给流体的泵（25b），以防止气蚀。

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