A method of testing an overload clutch, the method comprising: activating, with a processor (18) of a computer (14), a motor (22) of a hoist (12), the motor driving a cable drum (26) through the overload clutch (36); loading a cable (34) to a minimum clutch slip load with the motor; sensing a load on the cable and communicating the load to the processor; and monitoring the overload clutch with a sensor (30), the sensor configured to sense slippage of a friction disc of the overload clutch and to generate a slip signal in response to slippage of the friction disc. The processor of the computer commands the rescue hoist to wind to build a load on the cable. As the tension builds the sensor monitors the overload clutch to determine if any friction discs in the overload clutch slip as the load builds. When the load reaches a minimum clutch slip load, the load is relieved. Where the friction discs slip before the load reaches the minimum clutch slip load, the overload clutch fails the test. Where the friction discs do not slip before the load reaches the minimum clutch slip load, the overload clutch passes the test.
AUTOMATIC TESTING OF OVERLOAD PROTECTION DEVICE IN A RESCUE HOIST
AUTOMATISCHES PRÜFEN EINER ÜBERLASTUNGSSCHUTZVORRICHTUNG IN EINER RETTUNGSWINDE
ESSAI AUTOMATIQUE D'UN DISPOSITIF DE PROTECTION CONTRE LES SURCHARGES DANS UN PALAN DE SAUVETAGE
2019-12-04
Patent
Electronic Resource
English
IPC: | F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / F16H Getriebe , GEARING / B66D Haspeln , CAPSTANS / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte |
AUTOMATIC TESTING OF OVERLOAD PROTECTION DEVICE IN A RESCUE HOIST
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