Different from ordinary rigid fans, a silicone oil fan clutch uses silicone oil as the medium and uses silicone oil shear viscosity to transmit torque. The space between the front cover of the fan clutch and the driven plate is an oil storage chamber, where high-viscosity silicone oil is stored.
The key sensing component is the spiral bimetallic sheet temperature sensor on the front cover. It senses heat and deforms to control the valve plate, so as to control the silicone oil to enter the working chamber and connect the drive shaft with the fan.
When the temperature is low, the control valve does not open, and the silicone oil in the oil storage chamber cannot flow into the working chamber at this time. There is no silicone oil in the working chamber, the torque on the driving plate cannot be transmitted to the driven plate, and the clutch is in a disengaged state.
Firstly, the locked fan clutch will lose a lot of power. It is understood that the power required by the rigidly connected cooling fan accounts for 3-5% of the engine power, and the fuel consumption is very amazing.
Secondly, silicone oil can play a certain buffer role. Even in the engaged state, the speed of the fan is smaller than that of the drive shaft, which will cause a great impact on the connection. The diameter of the heavy truck fan is very large, and the inertia is also large. The fan rotates with the engine, and the engine starts and stops very quickly, which will cause a strong impact on the connection of the fan clutch. Under the inertia for a long time, If the situation is serious, the fan will fall and the water tank may be damaged, which should not be underestimated.
If you choose to drive a truck, you must learn to operate. The engine is the core component of the truck, and the fan, as the cooling system, plays a vital role in the working efficiency of the engine.