How to identify whether a diesel generator set is old or new?

在Generator setDuring the purchase, many customers encounter the problem of identifying whether the equipment is new or old, which is also where people are easily deceived. So here Haixing Dynamics has compiled some identification techniques, you may wish to take a look together.

According to the experience of some technicians and veteran operators, to identify the newness of an old diesel engine, we can adopt the method of first question, second look, and third test, with the test as the main method.

First question: It is to ask about the purchase time, purpose and reason of sale of the diesel engine, the repair status and the main parts that have been replaced, and any problems during use, etc., in order to have a more comprehensive understanding of the engine.

The second inspection is to first check whether the model is obsolete, and then look at the appearance of the diesel engine to see if it is new or old, and check whether the parts are complete and whether they are damaged.

Third test: It is a test run. The specific method for debugging the diesel generator set is

1. Rotate the crankshaft to supply fuel to the fuel injection pump. If the fuel injection nozzle emits a crisp fuel injection sound, it means that the performance of the plunger pair and the fuel injection nozzle is good; if there is no abnormal sound in the gear chamber, it means that the wear of the gear is not serious.

2. Shake the flywheel up and down. If there is no sound or obvious shaking, it means that the gap between the crankshaft main journal and the bearing bush is not large; if there is no clicking sound when turning the flywheel, it means that the wear between the crankshaft connecting rod journal and the connecting rod bush is not serious. .

3. Decompress the cylinder and crank the crankshaft. When the decompression is removed, if the rebound force of the piston is large and the flywheel rotates rapidly, it means that the wear level of the cylinder liner, piston and piston ring is small. At this time, the oil pressure gauge reading should be no less than 1 or the red oil pressure indicator float can rise quickly, and it should be laborious to press the float by hand.

4. It is easier to start the diesel engine. If the exhaust is colorless or light gray, the speed is stable, and there is no noise, it means the diesel engine is in good technical condition.

Through the above methods, the old and new level of the old diesel generator set can generally be distinguished. In this way, it will be more accurate to make purchasing decisions. In addition, everyone should be wary of equipment that is too cheap, purchase carefully, and identify them carefully.