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What should I pay attention to when checking the cooling fan of diesel generator set?
June 23, 2022
Fan is an important part of the diesel generator cooling system, generally installed behind the radiator core, its main role is to increase the flow rate of air through the radiator core, improve the heat dissipation capacity of the radiator, water cooling system fan requires sufficient air volume, moderate wind pressure, low power consumption, high efficiency, low noise and simple process, in the water cooling system is commonly used in the axial flow fan, this form of fan structure This form of fan structure is simple, easy to arrange, low pressure head when the air volume is large, high efficiency.
Fan is an important part of the diesel generator cooling system, generally installed behind the radiator core, its main role is to increase the flow rate of air through the radiator core, improve the heat dissipation capacity of the radiator, water-cooled system fan requires sufficient air volume, moderate wind pressure, low power consumption, high efficiency, low noise and simple process, in the water-cooled system is commonly used is the axial flow fan, this form of fan structure This form of fan structure is simple, easy to arrange, low pressure head when the air volume is large, high efficiency.
Diesel generator fan air volume is mainly related to the fan diameter, speed, blade shape, blade mounting angle and the number of blades, in some diesel generator sets, cooling fan stamping blade end bending, in order to increase the fan air volume, blade should be installed with the fan rotation plane into 30 ~ 60 degrees inclination angle, the number of blades is usually 4 or 6, some will be made between the blade angle is not equal, in order to reduce the rotation generated The vibration and noise of the fan, the fan periphery installed wind protection ring, can properly improve the efficiency of the fan. For users, they should pay attention to these three problems of cooling fans on a daily basis, so as to find out the abnormal phenomenon of fans and solve the hidden problems of unit failure in time.
1, pay attention to check whether the fan has cracks, check whether the screws or blades are loose and other phenomena, such as cracks, please contact the maintenance personnel in a timely manner to replace or weld repair, welding repair should pay attention to, to effectively weld repair solid; such as screws or blades have loose phenomenon, if available to re-rivet the blade repair method to ensure that the fan installation is solid and reliable.
2, fan repair, to ensure that the fan runs smoothly, must be static balance test. The method is.
The impeller (blade and frame) is fixed on a special shaft and placed on a knife-shaped iron for inspection (as shown in the figure). When checking, gently poke the blade by hand, make the impeller with shaft rotate on the knife-shaped iron, and after it stops automatically, mark the impeller located at the bottom. So repeat several times, if each time in the lower position is the same blade, it means that the blade and other blades compared to some heavy, available grinding wheel will be its end surface or back side metal grinding away a little, make it reach static balance. Fan blade quality difference is generally not more than 5-10g, with the shaft of the impeller in the knife iron rotation, each stop is located in the lower position of the blade for any piece, then the fan blade to achieve static balance requirements.
3, some users will feel that the diesel generator cooling fan shape like an electric fan at home, but there is a difference between the two, most of the diesel generator fan blades made of thin steel stamping, but also available in plastic or aluminum alloy cast into a wing-shaped section of the overall fan, top Bo power remind you: nothing to pick and pull, or take something to pry it, not to borrow the fan to turn the diesel engine crankshaft, otherwise it will cause very serious injuries! Incident!
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