Structure And Function Of Pulley In Diesel Generator Set

The function of the engine pulley is to transmit power. When there is an accessory belt, the power output from the crankshaft is transmitted to the compressor, power steering pump, water pump, generator, etc. The timing belt transmits the power output from the crankshaft to the camshaft to drive the timing system. Some engines with a balance shaft also drive the balance shaft through the belt.

Pulleys, which belong to the hub type parts, are generally relatively large in size. The manufacturing process is generally based on casting and forging. Generally, the larger size is designed by the casting method, and the material is generally cast iron (with good casting performance). Use less cast steel (steel has poor casting performance), generally smaller size can be designed for forging, the material is steel, and the pulley is mainly used for long-distance transmission of power.

The advantages of the pulley drive are: the pulley drive can alleviate the load impact, the pulley drive runs smoothly, with low noise and low vibration, the pulley drive has a simple structure and is easy to adjust, the pulley drive is not as strict as the manufacturing and installation accuracy of the pulley. It has the function of overload protection, the adjustment range of the center distance between the two axles driven by the pulley is large.

The disadvantages of the belt drive are: the pulley drive has elastic sliding and slipping, the transmission efficiency is low and the accurate transmission ratio cannot be maintained, when the pulley drive transmits the same large circumferential force, the contour size and the pressure on the shaft are larger than the meshing drive, the pulley drive belt shorter lifespan.

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