The reason why the diesel generator 500kw should not be idle for a long time?

The 500kw of diesel generator should not be idle for a long time, which will reduce the quality of fuel injection atomization and accelerate the early wear of the cylinder wall of the diesel generator set. Because the quality of atomization is mainly directly related to the injection pressure, injector bore diameter and camshaft speed. Since the injector bore size is constant, the quality of the fuel atomization depends on the injection pressure and camshaft speed.

The slower the camshaft speed, the longer the injection pressure rises, the worse the fuel atomization quality, and the camshaft speed varies with the change of random group speed. Prolonged idling can cause the combustion temperature of the diesel generator set to be too low and the combustion is incomplete, which may cause carbon deposits to clog the injector nozzles, piston rings or lock the valves.

Therefore, the diesel generator set should not be in the idle operation state for a long time, the user should strictly follow the operation standards when using, only the normal operation can ensure the high efficiency of the diesel generator set, and achieve the ideal service life.

Some issues that need to be paid attention to in the use of generators:

1.Occasions of use.

1) When the generator is in use, it should be placed outdoors or in a well-ventilated place in the machine room, not close to doors, windows and vents to avoid carbon monoxide entering the room.

2) Do not use generators near flammable and explosive materials.

3) The generator should be placed in a dry place, and if it needs to be installed and used in the open air, it must be covered by a canopy-type building to prevent contact accidents due to moisture.

4) Do not use portable generators indoors, such as garages, carports, basements and enclosed places. The use of portable generators in these situations, even if the windows and doors are opened or mechanically ventilated, does not prevent the accumulation of carbon monoxide indoors, which can lead to carbon monoxide poisoning, fire, and even electric shock.

2.Storage and use of fuel.

1) The fuel oil for power generation shall be stored in a special warehouse, and the facilities in the warehouse must comply with the regulations of the fire department.

2) The type of fuel used should be consistent with the requirements on the generator's instruction manual or label.

3) There can be too much fuel in the generator, especially the gasoline generator set, if it is not used for up to 30 days, gasoline stabilizer should be added to prevent gasoline wax from volatilizing and causing accidents.

4) Before adding fuel, the generator should be turned off first, and then added after the generator cools down to prevent the gasoline from gradually catching fire on the parts with higher temperature, causing disasters.

3.Line connections.

1) The specifications of the outdoor wire must be able to meet the requirements of the electrical load used.

2) When using an extended wire, make sure that it is well insulated from the ground.

3) The outgoing line of the generator cannot be directly plugged into the original power socket of the residence for power supply, which will form a feedback, which may cause an electric shock accident for users powered by the same transformer. The correct connection is for an electrician to install a power transfer switch.

1. Precautions for operation of 400kw diesel generator set:

1. The generator set should be placed in a stable and safe place, and have good ventilation conditions (ambient temperature 40), which is convenient for the unit to dissipate heat.

2. It is strictly forbidden to place it outdoors in the sun and rain to avoid the invasion of water droplets, metal fragments or other sundries.

3. The power generation mega-ruler unit should ensure that the grounding is good, and the power output cable should have sufficient cross-sectional area, good contact, and the correct connection cable is round.

4. When the external electrical appliances are operated, the three-phase electricity must be balanced, and it is strictly forbidden to overload the operation for a long time. It is used in strict accordance with the calibrated power.

5. The brush motor must regularly check the wear of the brushes, the lubricating oil in the bearing chamber and the parts linked with the engine.

6. The unit has been running for 50 hours for the first time to change the oil, and then every 200 hours of cumulative operation to change the oil and the high filter of the machine family cavity, it is recommended to use CF-4 diesel engine oil.

7. If the unit is not used for a long time, the battery connection line must be removed, and the battery should be fully charged once a month to ensure that there is sufficient power to start the engine.

When the 400kw diesel generator is running, it is necessary to pay attention to the following eight major matters:

1. After the unit is started, check the parameters of the control box module; Oil pressure, water temperature, voltage, frequency, etc.

2. Under normal circumstances, the speed of the unit directly reaches the rated speed after starting; For units with pure liquid first idle speed requiring burying the bench, the idle time is generally 3 5min, and the idle time is not easy to be too long, otherwise it may burn out the generator-related components.

3. Check the leakage of 400kw diesel generator oil circuit, water circuit and electrical appliances.

4. Check the fastening of the connections of the 400kw diesel generator to see if there is looseness and severe vibration.

5. Observe whether the various protection and monitoring devices of the unit are normal.

6. When the rotor reaches the rated speed and the parameters of no-load operation are stable, the power supply will be closed.

7. Check and confirm whether the parameters of the control panel are within the allowable range, and check the vibration of the unit again, whether there are three leaks and other faults.

8. It is strictly forbidden to overload the unit during operation.

When the diesel engine is idling, the lubricating oil pressure is low, and the oil injection cooling effect on the top of the piston is poor, resulting in a sharp increase in wear and tear, and it is easy to pull the cylinder; It can also cause poor atomization, incomplete combustion, serious carbon deposit, and sometimes even lead to valve and piston ring jamming, cylinder liner cavitation. For this reason, some diesel engine instruction manuals clearly stipulate that the idle time of diesel engine shall not exceed 15 20min.

1. The diesel generator runs at low idle speed for a long time, and the working temperature of the engine will be relatively low and the fuel injection pressure will be low, resulting in poor diesel atomization, incomplete fuel combustion, easy carbon deposition in the nozzle, resulting in needle valve jamming, and serious carbon deposition in the exhaust tailpipe.

2. The incomplete combustion of fuel will wash the cylinder wall, dilute the lubricating oil, cause the wear of the piston ring, and cause serious failures such as pulling the cylinder.

3. Low idle speed for a long time, the oil pressure is relatively low, which will cause accelerated wear and tear of moving parts. The internal combustion engine is a heat engine, and the engine can only maintain good working condition under the influence of coolant temperature, lubricating oil temperature, fuel combustion temperature, etc.

Diesel generators generally have a permissible idle time.

Any vehicle idling for a long time will form carbon deposits, so under normal circumstances, it is not recommended to idle frequently when the vehicle is in operation.

1.The idle time is long, the engine is prone to carbon deposits, and the inside of the engine is easy to wear. 2.Long idle time will affect power generation. 3.As long as the water temperature is not high, it is recommended to run at medium speed.

1. Leakage of fuel oil pipeline. Treatment: Check whether the connection is loose, whether the pipe is broken, whether the filter is not tightened, etc., and correct them one by one.

2. Improper adjustment or wear of the throttle drive rod. Treatment: Check the wear and tear, replace and adjust the transmission rod 3, the fuel quality is poor. Handling: Check for fuel replacement.

4. The idle spring is not assembled correctly. Processing: Reassemble the adjustment.

5. The centrifugal hammer of the speed limiter is not properly assembled. Processing: Recalibrate.

6. There is water or wax in the fuel. Treatment: Fuel replaced, all filters replaced, fuel heater installed.

7. The fuel pump is calibrated incorrectly. Treatment: Re-adjust the fuel pumpIn addition, if the idle speed of the 800kw diesel generator is not appropriate, then it should be readjusted. I hope the above introduction can bring reference to users.

There are many reasons for the automatic shutdown of diesel generator sets, but there are mainly two aspects, one is the interruption of fuel supply; Second, the moving parts are blocked.

In the process of normal operation, if the speed gradually slows down, the burst sound gradually weakens, the water temperature, oil temperature and pressure are normal, the throttle has no effect, and the engine gradually turns off after a period of time.

In the process of operation, the oil pressure is normal, but the oil temperature is higher, the water temperature is high, and there is a paint smell, the water outlet of the cooling water outlet is less or does not produce water, and the steam is rising, the machine runs hard, the sound is rough, there is the sound of pulling the cylinder when it is close to parking, the speed gradually decreases, and when the last stop, it is difficult for the flywheel to rotate forward and backward, and the flywheel does not move after parking. After the temperature of the machine is reduced, the flywheel can be coiled again, according to which it can be judged that the piston is bitten.

In the process of operation, the water temperature is normal, the oil pressure drops, the oil temperature rises, there are metal chips in the oil, the smell of organic oil burning dry, the vibration of the machine is intensified, the sound is abnormal, the speed is gradually reduced, the inertia rotation time is short when parking, the disc does not move the flywheel after parking, and the flywheel does not move after the machine cools down, which can be judged to be the spindle burning tile, also known as the holding shaft.

If the 500kw diesel generator continues to run under low load, the following faults may occur:

1. The piston-cylinder liner in the diesel engine of the generator set.

The seal is not good, which causes the oil to go up, enter the combustion chamber for combustion, and the exhaust emits blue smoke. 2. For supercharged diesel engines, low-load operation is low due to low load and no load. It is easy to cause the sealing effect of the supercharger oil seal (non-contact) to decrease, and the oil will enter the pressurized chamber and enter the cylinder with the intake air.

3. Part of the oil of the cylinder participates in the combustion, and part of the oil cannot be completely burned, forming carbon deposits in the valves, intake tracts, piston tops, piston rings, etc., and some parts are discharged with the exhaust. As a result, oil accumulates in the cylinder liner exhaust tract and carbon deposits are formed.

4. When the oil in the pressurized chamber of the supercharger accumulates to a certain extent, it will leak out from the joint surface of the supercharger.

5. Long-term low-load operation will lead to more serious consequences such as aggravated wear and tear between the moving parts of the diesel engine, deterioration of the engine combustion environment, etc.