hubwinde with zusammengebauter kupplungs and bremsvorrichtung

摘要

In combination with a drawworks hoist, a continuously slipping clutch is employed with apparatus for applying controlled torque or braking to the drawworks hoist. A drawworks hoist is used to provide in-haul and overhaul action to a coupled drum, the drum being wound with appropriate cabling. A continuously slipping clutch will drive the drawworks shafts in an in-haul direction through an overrunning clutch when it is desired to maintain a controlled tension on the cable irrespective of vertical movement of the drawworks hoist assembly. The continuously slipping clutch will be disengaged from the drawworks hoist shaft when the drawworks is reeling the cable in an in-haul direction. When the cable is being payed out, the continuously slipping clutch provides supplemental braking by securing the driving member of the continuously slipping clutch to the fixed frame of reference.