Differentdiesel generatorsmanufacturers and different power diesel generators use different oils. Normally, a new engine operates for 50 hours for the first time and 50 hours after repair or overhaul.
The oil change cycle usually occurs at the same time as the oil filter (filter element). The general oil change interval is 250 hours or one month. With Category 2 engine oil, the oil can be changed after 400 hours of operation, but the oil filter (filter element) must be replaced.
Function of diesel generator oil
1. Sealing and leak prevention: Oil can form a sealing ring between the piston ring and the piston to reduce gas leakage and prevent external pollutants from entering. .
2. Anti-rust and anti-corrosion: the lubricating oil will be sucked into the surface of the pparts to prevent water, air, acidic substances and harmful gases from coming into contact with the parts.
3. Lubrication and wear reduction: Rapid relative sliding between piston and cylinder and between main shaft and bearing. To prevent excessive wear of the parts, a film of oil is necessary between the two sliding surfaces. An oil film of sufficient thickness separates the surfaces of opposing sliding parts to reduce wear.
4. Cleaning: High quality engine oil can carry carbides, sludge and worn metal particles on engine parts back to the fuel tank and remove dirt generated on the working surfaces of the parts by the flow. lubricating oil.
Why is the generator's fixed cooling water tank filled with nitrogen?
1. Place the generator on a flat surface and start the engine for a few minutes to increaseer. the oil temperature, then stop the engine.
2. Remove the oil fill bolt (i.e. oil dipstick).
3. Place a pan of oil under the engine, remove the oil drain screw and the oil can be drained from the crankshaft oil reservoir.
4. Check the oil drain screw, seal ring and rubber ring. If there is any damage, please replace it immediately.
5. Reinstall the oil drain screw and tighten it.
6. Lower the engine oil and add it to the upper position of the oil dipstick grid.
The functions of diesel generator oil:
1. Lubrication: There is rapid relative sliding between the piston and cylinder, and between the main shaft and the bearing. to prevent the parts from moving too quickly. Wear requires the establishment of a film of oil between the two sliding surfaces. An oil film of sufficient thickness separatesthe surfaces of the parts relatively sliding, thus reducing wear.
2. Auxiliary Cooling: Since the specific calorific value of engine oil is low and it is inside the engine, it does not have a cooling effect on its own. However, thermal energy is generated by the combustion of fuel in the engine. When the engine is running, the engine oil can carry heat back to the oil tank and then dissipate it into the air to help the water tank cool the engine. The cooling effect is water (or antifreeze) on the outside of the engine crankcase.
3. Cleaning: Good engine oil can carry carbides, sludge and wear metal particles on engine parts back to the oil tank through circulation. Thanks to the flow of lubricating oil, parts can be washed away. Dirt on the work surface.
4. Sealing and leak prevention: word oileur can form a sealing ring between the piston ring and the piston, thereby reducing gas leakage and preventing external pollutants from entering.
5. Anti-rust and anti-corrosion: Lubricating oil can be absorbed on the surface of parts to prevent water, air, acidic substances and harmful gases from contacting the parts.
6. Shock absorption and damping: When the pressure at the engine cylinder mouth increases sharply, the load on the piston, piston shavings, connecting rod and crankshaft bearing is suddenly increased. This load is transmitted and lubricated by the bearing. , which causes the impact load to act as a buffer.
7. Anti-wear: Adding lubricant to the friction surface can reduce the friction coefficient, thereby reducing friction resistance, saving energy consumption and reducing wear: lubricant can reduce abrasive wear betweenthe friction surfaces. Wear loss caused by surface fatigue, adhesive wear, etc.
Precautions for generator sets
The purpose of filling the cold water tank of the generator with nitrogen is to avoid corrosion and rust.
The fixed cooling water tank of the generator is usually filled with nitrogen during transportation or maintenance breakdown.
Nitrogen, with the chemical formula N2, is generally a colorless and odorless gas, and is generally non-toxic. Nitrogen is generally less dense than air. Nitrogen represents 78.12% (volume fraction) of the total atmosphere and is the main component of air. Under standard atmospheric pressure, when cooled to -195.8°C, it turns into a colorless liquid. When cooled to -209.8°C, liquid nitrogen turns into a snow-like solid. The chemical properties of nitrogen are inactive and it is difficult to reactwith other substances at room temperature. However, it can undergo chemical modifications with certain substances under high temperature and energy conditions and can be used to produce new substances useful to humans. .
The following should be noted when using diesel generator sets:
1. Pay attention to the use occasions
1) The generator should be placed outdoors or in the engine room when using. In a well-ventilated area, do not be near doors, windows and air vents to prevent carbon monoxide from entering the room.
2) Do not use generators near flammable and explosive materials.
3) The generator must be placed in a dry place. If it must be installed in the open air, it must be protected by a canopy type building to avoid contact accidents due to humidity.
2. Pay attention to fuel storage and use
1) Generator fuel should be stored in a dedicated warehouse, and the warehouse facilities should comply with fire department regulations.
2) The type of fuel used must comply with the requirements listed on the generator's instruction manual or label.
3) Before adding fuel, the generator should be turned off first, then added after the generator has cooled to prevent the fuel from gradually reaching the higher temperature parts and taking fire, causing disaster.
3. Pay attention to the connection of the generator wiring
1) The specifications of the outdoor wiring should meet the requirements of the electrical load used.
2) When using an extended wire, make sure it is well insulated from earth.
3) Do not plug the generator output wire directly into the power supply.on the residence's original electrical outlet. If power is supplied to the outlet, feedback will occur, which may cause electric shock to users powered by the same transformer. The correct connection is for an electrician to install a power transfer switch.
4. Keep diesel fuel clean.
Before using oil barrels to fill diesel fuel, the diesel fuel must undergo sufficient sedimentation, and the sedimentation time is preferably more than 3 days. When refueling, it must also be carefully filtered to avoid mixing of mechanical impurities. The oil storage container and refueling tools should also be kept clean during operation.
5. Other fuels cannot be mixed with the unit's diesel.
If there are other fuels in diesel, the combustion performance will be significantly worse, resulting inwill have starting difficulties, or even a starting failure. Any other fuel entering the cylinder will also remove the lubricating oil film from the cylinder and accelerate cylinder wear.
6. Try to use high quality diesel.
The quality of diesel is directly related to the ability of the diesel engine to operate normally. If you use poor quality diesel, on the one hand, it will reduce the power of the diesel engine due to poor combustion, making it insufficient in power, on the other hand, if used for a long time, it will accelerate; wear of various parts of the fuel system and reduce the life of the diesel engine. Therefore, try to choose a diesel of good quality and appropriate brand.