The fan consists of a hub with a pulley, to which the blades are attached. The fan blades are made of sheet steel or plastic. The fan drive has automatic on and off and is carried out by:
Fan Construction:
- gears;
- V-belt transmission;
- electromagnetic clutch;
- hydrodynamic coupling;
- autonomous electric drive;
- viscous coupling;
- friction clutch.
The fan is installed directly behind the radiator. To improve the efficiency of the fan, it is sometimes stirred in a guide casing mounted on a radiator. Ha drive a fan takes 3-5% of engine power. A fan increases engine noise. Therefore, they strive to ensure efficient operation of the cooling system with minimal energy costs.
The hydraulic coupling of the truck fan drive (a) and the hydraulic coupling switch with a thermal power sensor (b):
1 – front cover; 2 – case; 3 – a casing; 4, 7, 12, 13 and 20 – ball bearings, 5 – oil supply pipe; 6 – drive shaft; 8 – a sealing ring; 9 – driven gear; 10 – driving gear; 11 – a pulley, 14 – a persistent sleeve; 15 – fan hub; 16 – a conducted shaft; 17 and 21 – self-moving sealing couplings; I8 – gasket; 19 and 22 – bolts; 23 – switch housing, 24 – valve plug lever, 25 – thermo-power sensor.
