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Markets & Applications
Hydrostatic Fan Drives
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Fan drives dissipate the heat, coming with the coolant from the combustion engine. The cooling performance of a radiator is determined by the fan size, pitch of blades and fan speed.
Controlled hydrostatic fan drives are superior to the conventional units with V-belts:
- Stepless control of fan speed between minimum and maximum
- The mounting location in the vehicle is completely optional
- The components are small and space saving
Other advantages of controlled hydrostatic fan drives:
General
- High reliability
- A wide ambient temperature range from –40 °C to +100 °C
Control system based on cooling performance requirements
- Reduced exhaust gas and noise emissions
- Reduced fuel consumption
- Maximum fan speed limitation independent of the combustion engine speed
Other technical options
- Automatic increase of fan speed when actuating functions with high heat load (e. g. retarder)
- Fail safe mode of operation, that means going automatically to maximum fan speed in case of control function failure.
- Starting up at defined fan speeds
For a hydraulic fan drive the following options are possible:
- Hydro-mechanically controlled
- Gear pump (fixed), gear motor, thermal relief valve, priority valve
- Axial piston displacement pump, fixed motor, thermal relief valve
- Electro-hydraulically controlled
- Gear pump (fixed), gear motor, electronics, temperature sensors
- Axial piston variable displacement pump, fixed motor, electronics, temperature sensors
Areas of applications for hydrostatic fan drives:
- Constructions Machines: crawler excavators, mobile excavators, bulldozers, wheel loaders, excavator loaders, mobile cranes, forklifts, telehandlers, pavers, others
- Agriculture and Forestry: tractors, combine, forestry machines
- Road Vehicles: buses, trucks, heavy load transporters, special vehicles
- Rail Vehicles: locomotives, diesel railcars
For more details, see navigation bar at the right hand side or download the More Power Less Energy, Hydrostatic Fan Drives from Rexroth Brochure (PDF File, 1.32 MB)
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