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Wrong operations of diesel generator

Jul. 01, 2021

Many friends have many misunderstandings in the operation of diesel generators, which will not only cause failures of cylinder pull and tile burning, but also cause insufficient combustion process and bury potential safety hazards. So everyone will follow the starlight to understand them carefully. What are the common mistakes?

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Wrong operation of diesel generator 1: The diesel engine runs when the oil is insufficient

At this time, insufficient oil supply will cause insufficient oil supply on the surface of each friction pair, resulting in abnormal wear or burns. For this reason, before starting the diesel generator and during the operation of the diesel engine, it is necessary to ensure sufficient oil to prevent cylinder pulling and tile burning failures caused by oil shortage.


Wrong operation of diesel generator 2: Sudden shutdown with load or shutdown immediately after sudden load removal

After the diesel engine generator is turned off, the cooling system water circulation stops, the heat dissipation capacity is drastically reduced, and the heated parts lose cooling. It is easy to cause the cylinder head, cylinder liner, cylinder block and other parts to overheat, cause cracks, or cause the piston to over-expand and become stuck in the cylinder liner. Inside. On the other hand, if the diesel generator is shut down without cooling at idle speed, the friction surface will not contain enough oil. When the diesel engine restarts, it will aggravate wear due to poor lubrication. Therefore, before the diesel generator stalls, the load should be unloaded, and the speed should be gradually reduced and run for a few minutes without load.


Wrong operation of diesel generator 3: After cold start, the engine will run with load without warming up

When the cold engine of a diesel generator is started, due to the high oil viscosity and poor fluidity, the oil pump is insufficiently supplied, and the friction surface of the machine is poorly lubricated due to lack of oil, causing rapid wear and even failures such as cylinder pulling and tile burning. Therefore, the diesel engine should run at idling speed after cooling and start to heat up, and then run with load when the standby oil temperature reaches 40℃ or more; the machine should start with low gear and drive for a certain mileage in each gear in sequence until the oil temperature is normal and the fuel supply is sufficient. After that, it can be switched to normal driving.


Diesel generator incorrect operation 4: After the diesel engine is cold-started, the throttle is slammed

If the throttle is slammed, the speed of the diesel generator will rise sharply, which will cause some friction surfaces on the machine to be severely worn due to dry friction. In addition, the piston, connecting rod, and crankshaft receive large changes when the throttle is hit, causing severe impacts and easily damaging parts.


Diesel generator wrong operation five: running under the condition of insufficient cooling water or too high temperature of cooling water and engine oil

Insufficient cooling water of diesel generator will reduce its cooling effect. Diesel engine will overheat due to ineffective cooling. Excessive temperature of cooling water and oil will also cause diesel engine to overheat. At this time, diesel generator cylinder heads, cylinder liners, piston components and valves are subject to heavy thermal loads, and their mechanical properties such as strength and toughness drop sharply, which increases the deformation of the parts, reduces the matching gap between the parts, and accelerates the wear of the parts , In severe cases, cracks and malfunctions of mechanical parts jamming may occur. The overheating of the diesel generator will also deteriorate the combustion process of the diesel engine, causing the injector to work abnormally, poor atomization, and increasing carbon deposits.


Of course, the wrong operation is not only the 5 mentioned above, but also some detailed precautions that require the staff to strictly abide by the operating specifications to achieve scientific operation, so as to delay depreciation and fully guarantee production.


Starlight Power was founded in 1974 and is one of the earliest manufacturers of generators and diesel generator sets in China. If you want get more information, please feel free to send email to sales@dieselgeneratortech.com we will pay highly attention on your question.

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