Diesel Generator Set: The Buying Guide for importers
Diesel Generator Set
Diesel generator sets in the purchase, customers are most concerned about the price of the generator set, generator sets according to the brand points there are many kinds, and different diesel engine power equipped with the generator set price is not the same, Suneco diesel generator set manufacturers to introduce you to the diesel generator set price how to compare.
Ask the old diesel engine acquisition time, use, and the reason for sale, ask the past repair situation, what major components have been replaced, ask what problems in use, in order to have a more comprehensive and systematic understanding of the old diesel engine.
Look at the old diesel engine label and appearance.
Look at which factory production, when the factory, from the existing, how long; look at the appearance of the paint is off, whether the Ministry is missing, whether the model is eliminated.
From the label and appearance to determine the newness of the old diesel engine.
Test engine.
By cranking the crankshaft, pulling the flywheel, start the machine, etc., the old diesel engine for careful inspection.
The Test Engine is a very important step, the specific inspection steps are as follows.
1. crank the crankshaft, so that the injector nozzle oil supply.
If the injector makes a crisp sound, it means that the injector and plunger vice performance is still good; if there is no “wow” and another abnormal sound inside the wheel, it means that the wear of the gear is not serious.
2. Turn the flywheel up and down, such as no sound, the crankshaft main stem and the clearance between the shaft tile is not large.
3. Turn the flywheel, so that the piston is close to the lower stop, and then shake the flywheel, such as no “clatter” sound, that the wear between the connecting rod shaft stem and tile is not serious.
4. so that the cylinder depressurization, crankshaft, when the removal of depressurization, such as the piston rebound force, flywheel rapid rotation, that the cylinder, piston, piston ring wear degree is small.
When shaking the crankshaft, the oil pressure gauge pointer should not be less than 1, or oil batch red mark can quickly rise, under the pressure should be an effort.
5. Start the machine. If it is easy to start, the exhaust smoke is colorless or light gray, the speed is stable without noise, indicating that the technical condition of the old diesel engine is good.
Note: In the testing process of the diesel generator set, it is best to operate and track the changes in data such as air pressure and oil pressure all in the diesel generator controller. Therefore, the quality of diesel generator controller stability, design humanization and other aspects of the requirements are high.