What faults may be caused by unscheduled maintenance of diesel generator sets?

Diesel generator sets are generally used as emergency backup power supply after mains power failure. Most of the time, the generator set is in a standby state. Once the power fails, the diesel generator set is required to "start in an emergency and supply power in an emergency", otherwise the standby generator set will be meaningless, but Because the generator set is in a static state, various materials of its own will undergo complex chemical and physical changes with oil, cooling water, diesel oil, air, etc., which may cause some failures of the unit, which may “stop” the unit.

 

Diesel generator sets are generally used as emergency backup power supply after mains power failure. Most of the time, the generator set is in a standby state. Once the power fails, the diesel generator set is required to "start in an emergency and supply power in an emergency", otherwise the standby generator set will be meaningless, but Because the generator set is in a static state, various materials of its own will undergo complex chemical and physical changes with oil, cooling water, diesel oil, air, etc., which may cause the following failures of the unit, which may “stop” the unit:

 

1. Water enters the diesel engine

Due to the condensation phenomenon of water vapor in the air due to the change of temperature, it forms water droplets and hangs on the inner wall of the fuel tank and flows into the diesel oil, causing the water content of the diesel oil to exceed the standard. Such diesel oil entering the high-pressure oil pump of the engine will corrode the plunger of the precision coupling, serious It will damage the unit, and regular maintenance can be effectively avoided.

 

 2. Oil deterioration

Oil retention period (two years) The engine oil is mechanically lubricating, and the oil also has a certain retention period. If stored for a long time, the physical and chemical properties of the oil will change, resulting in the deterioration of the lubrication condition when the unit is working, and it is easy to cause damage to the unit parts. , so the lubricating oil should be replaced regularly.

 

3. The replacement cycle of the three filters

 The filter plays a role in filtering diesel oil, oil or water to prevent impurities from entering the body, and oil pollution and impurities are inevitable in diesel oil, so the filter plays an important role in the operation of the unit, but At the same time, these oil stains or impurities will be deposited on the screen wall, which will reduce the filtering ability of the filter. If there is too much deposition, the oil circuit will not be smooth. Therefore, during the normal use of the generator set, JUNVOCH recommends:

       1) Commonly used units replace three filters every 300 hours;

       2) The standby unit replaces three filters every year.

 

4. Cooling system

The water pump, water tank and water pipeline have not been cleaned for a long time, which will make the water circulation not smooth and the cooling effect will decrease. Check whether the water pipe joints are in good condition, and whether there is water leakage in the water tank and water channel. If the cooling system is faulty, the consequences are as follows:

       1) The cooling effect is not good and the water temperature in the unit is too high and the machine is shut down;

       2) The water tank leaks and the water level in the water tank drops, and the unit will not work properly (to prevent the water pipes from freezing when the generator is used in winter, Tingbo Electric recommends that it is best to install a water jacket heater in the cooling system).

 

5. Lubrication system, seals

Due to the chemical properties of lubricating oil or grease and the iron filings generated after mechanical wear, these not only reduce its lubricating effect, but also accelerate the damage of parts. At the same time, because the lubricating oil has a certain corrosive effect on the rubber sealing ring, in addition, the oil seal itself It also ages at any time to reduce its sealing effect.

 

6. Fuel and gas distribution system

The output of engine power is mainly the fuel that burns in the cylinder to do work and the fuel is sprayed through the fuel injector, which causes the carbon deposit after combustion to be deposited on the fuel injector. As a result, the ignition advance angle of the fuel injector is inaccurate, the fuel injection volume of each cylinder of the engine is uneven, and the working state is unstable. Therefore, the fuel system should be cleaned regularly, and the filter parts should be replaced to ensure smooth fuel supply. The adjustment of the gas system makes it ignite evenly.

 

To sum up, JUNVOCH reminds you: strengthening the regular maintenance of diesel generator sets, especially preventive maintenance is the most economical maintenance, and is the key to prolonging the service life of diesel generators and reducing the cost of use.