Housing Freewheels FHHS for stationary multi-motor drives with roller lift-off and hydrodynamic bearings Application as ➧ Overrunning Clutch at very high speeds, which can be same or similar in freewheeling operation and driving operations. Features Housing Freewheels FHHS with hydrodynamic roller lift-off are typically used in cases where an assembly can be driven from two or more motors or turbines at the same or similar high speed. They allow a continuous plant operation in the event that one of the energy sources or a drive line fails as well as energy saving in the case of partial load operation. The Housing Freewheels FHHS are completely enclosed freewheels for stationary arrangement with input and output shaft. Thanks to the hydrodynamic bearing, the freewheel can be operated at speeds of up to 12,000 rpm. Nominal torques up to 24 405 Nm Shaft diameter up to 141,28 mm Wear-free high-speed operation Integrated locking brake Hydrodynamic roller lift-off Housing Freewheels FHHS are equipped with hydrodynamic roller lift-off. The hydrodynamic roller lift-off is the ideal solution for overrunning clutches at high speeds, not only in freewheeling operation, but also in the driving operation, as can occur, for example, in multi-motor Outer ring Hydrodynamic bearing Spring system Inner ring Input shaft 60-2 drives. In the case of hydrodynamic roller liftoff, the lifting force is generated by an oil jet, which is directed through several axial oil jets in the hydrodynamic bearings. This provides for practically wear-free freewheeling operation. The speed differential between the inner and outer rings is the decisive factor affecting the lift-off function. If the speed differential decreases, the lift-off force also decreases. Before achieving synchronous running, the clamping rollers guided in a cage are positioned with the aid of the central spring system against the outer ring race and are then ready to lock. This guarantees immediate torque transfer once the synchronous speed has been r

Housing Freewheels FHHS for stationary multi-motor drives with roller lift-off and hydrodynamic bearings Areas of application driving operation freewheeling operation freewheeling operation Housing Freewheels as automatic freewheels in multiple drives fulfil here an important function. They disengage a drive automatically as soon as it no longer provides power to the working machine. Typical applications are at locations such as • Refineries • Chemical Plants • Fertilizer plants • Hydrocarbon processing • Locations that speeds exceed ball type bearings Application example The pump system is started...

Housing Freewheels FHHS for stationary multi-motor drives with roller lift-off and hydrodynamic bearings Activation of locking break Cage Hydrodynamic bearings Locking break Output shaft Contactless seal Input shaft Contactless seal Hydrodynamic bearings High-performance test bench for FHHS The test bench enables the examination of housing freewheels at speeds of up to 12 000 rpm and serves to verify their performance characteristics. The measured data can be used by plant manufacturers and designers to support their own quality processes.

The maximum transmissible torque is 2 times the specified nominal torque. See page 14 for determination of selection torque. Keyway according to USAS B17.1-1967 During freewheeling operation, the stationary input shaft of the Housing Freewheel is effected by a drag torque from the freewheeling output shaft. By manually activation of the in the housing freewheel integrated locking brake the driving parts are prevented from being carried along. The Housing Freewheel must be mounted in such a way that shaft d1 is the input shaft and shaft d2 the output shaft. The freewheel clutch oil inlet can be...