The insulation of the generator exhaust pipe aims to prevent heat from the exhaust pipe from being released into the engine room and increase the temperature of the engine room.
Generator exhaust is pressurized exhaust, with high combustion gas temperature and high air flow velocity. Combustion gases must be vented at high altitude. The flue must be thermally insulated and a damping support must be installed. installed.
The generator room should pay attention to ventilation and smoke exhaust, otherwise it will affect the use of the generator and cause damage to the generator. For a business that can't afford a power outage, generator damage is. a very bad thing.
The purpose of tailpipe exhaust is to exhaust indoor smoke and dust to the outside via exhaust machines. PondSince smoke and dust often stick to the pipe, the smoke exhaust pipe should be cleaned frequently.
What is the reason why the exhaust pipe of diesel engine generator set is too long and needs to be insulated?
What does exhaust drip mean? What is the problem with exhaust drip? Many car owners don't know much about it. Here is what I compiled for you. be useful to you.
Three situations when water leaks from car exhaust pipes
The first is when the water vapor evaporates and sprays water vapor. condenses into water droplets in the exhaust pipe before the water is sprayed. You can sometimes see white smoke coming from the exhaust; this is usually the case when first starting a car parked in winter or rainy seasons. However, if the white smoke disappears once the engine temperature increases, it is not necessary. worry about this situation and no maintenance is required.
The second situation is that the exhaust pipe sprays black smoke or even black water drops. This phenomenon means that the engine is consuming oil. Please be careful to check the oil level before getting out of the engine. temperature If the exhaust pipe turns into black smoke after rising, this indicates that the cylinder pressure is too low or individual cylinders are not working. They need to be checked and eliminated, and it is necessary to go to the service station for maintenance.
The third situation is when the engine is running. If the exhaust pipe emits a large amount of water vapor and white smoke, you should check whether there is water accumulated in the fuel tank, check whether the joint of the cylinder is damaged, whether there are cracks in the cylinder block, whether the cylinder liner seal ring is in good condition, etc.
Water leaking from the Automobile exhaust pipe indicates that the engine is running well, and the mist in the exhaust gas The photo shows that the engine is in good condition. However, if a large amount of water is deposited in the exhaust pipe, it will accelerate the corrosion of the exhaust pipe, so the water flowing out of the exhaust pipe should be cleaned in time.
What conditions must be met for water to flow from the exhaust pipe
1 The cylinder pressure in the engine must be normal
As an engine, in daily life When using, there is generally no wear inside the cylinder, and the coordination of different components such as liners of cylinder and the sealing rings is completely nnormal if the quality of the lubricating oil used by the car owner does. does not meet the standards and the added fuel does not meet the standards, it is very difficult to cause internal wear of the engine, resulting in low cylinder pressure and incomplete combustion.
2. It is necessary to have the right oil and gas mixing ratio.
This is mainly for Is there any problem with the oil and gas system? air ? If there is no problem with the car owner's air intake system and the compression ratio between inhaled air and fuel is normal, it means that the air intake system vehicle fuel is normal and there is no problem. At this point, fuel consumption will also decrease. By keeping it within a certain range, car owners can also see a certain amount of water flowing out of the exhaust pipe after each operation.jet.
3 The exhaust system is normal
The heat emitted by the engine is all in the cylinder, and only a small amount or no heat is discharged into the exhaust pipe. exhaust. Engine power stabilizes. If the exhaust pipe temperature is too high, water vapor cannot form water droplets. Of course, the water formed should not be too high. A small amount is normal, but too much water can easily damage the car exhaust.
Common problems with exhaust pipes
1. Black smoke coming from the trachea
Analysis of the cause of the failure:< /p>
(1) The air filter is seriously clogged.
(2) Fuel injection time is too late.
(3) The fuel injector is defective or the newly installed fuel injector is the wrong model.
(4) The fuel injection pump is defectivee or the smoke limiter (or the boost compensator) is incorrectly adjusted.
(5) Compressor failure.
(6) Intercooler failure.
(7) The exhaust brake valve is in the closed position.
(8) Cylinder pressure is insufficient.
Judgment and troubleshooting methods:
Based on the above reasons, they are discussed as follows:
(1) Before checking the exhaust pipe for black smoke, you must first remove the air filter. If the black smoke from the diesel engine disappears, it means that the air filter is seriously clogged, resulting in insufficient air intake and causing black smoke. At the same time, you should also check whether the air intake pipe is blocked, such as whether the air intake pipe is flattened, etc.
(2) Too much fuel supply to the fuel injection pump or too much fuel supplyUneven performance of each cylinder will cause black smoke to be emitted from the exhaust pipe. Therefore, the fuel supply volume of the fuel injection pump must be changed. be readjusted. Improper adjustment of the smoke limiter will also cause black smoke to be emitted from the exhaust pipe. Adjusting the smoke limiter adjustment screw outward can reduce the amount of smoke, but adjusting too much will cause the motor to weaken.
(3) Severe wear of the compressor impeller or compressor impeller will reduce the air intake volume, causing black smoke to be emitted from the exhaust pipe. Severe air leakage from the exhaust pipe joint or compressor interface joint will also result in insufficient air intake, black smoke escaping from the exhaust pipe, or reduced power of the engine.
(4) Poor heat dissipationmic of the air-cooled intercooler will reduce air inlet and cause black smoke to be emitted from the exhaust pipe. Therefore, the intercooler should be cleaned frequently during daily maintenance to make it smooth. .
(5) If the exhaust brake valve is closed, it will also cause a lot of black smoke from the exhaust pipe, and the engine will not accelerate well and will be weak.
(6) Insufficient compression pressure in the cylinders is one of the main reasons for black smoke coming from the exhaust pipe.
If the cylinder pressure is insufficient, after starting the engine, gray-white smoke will initially be emitted, which will turn into black smoke as the temperature of the diesel engine increases.
Diesel generator maintenance manufacturer Xinghuo analyzes the main reasons for insufficient cylinder pressure:
(1) On jhad valves is too large or there is no clearance;
(2) The valve seat segment is not tightly sealed;
(3) L The corresponding space between the piston and the cylinder is too large; the piston ring loses its elasticity or breaks and leaks too much;
(4) The camshaft is seriously damaged. Wear, resulting in insufficient air intake and poor exhaust. Check the camshaft for wear. Use a 10mm dial indicator to measure valve lift. If the wear is significant, it should be. replaced.
2. White smoke comes out of the exhaust
Analysis of the cause of the failure:
(1) There is water in the oil, or the cylinder seal is damaged and the cylinder liner or cylinder head is cracked and leaking, causing water to enter the cylinder.
(2) The fuel injection pump camshaft of some cylinders is badly worn, resulting in delayExcessive cylinder fuel injection time. Diesel cannot be completely burned in the cylinder, so this will also happen. cause white smoke to emit from the exhaust pipe.
(3) The atomization of the fuel injector is poor or there is more than one seal under the fuel injector. Therefore, when replacing the fuel injector, the copper pad inside must be removed.
(4) The water-cooled intercooler leaks and the cooling water enters the cylinder through the intake pipe.
(5) The sealing ring at the turbine end of the compressor is not tightly sealed, and the oil is discharged directly from the exhaust pipe, forming "white smoke" in the pipe exhaust. If the exhaust pipe is emitting significant white smoke, be sure to carefully check whether the compressor is leaking oil while checking that other parts arenormal.
(6) The temperature is too low and it is difficult for the cylinder temperature to rise, especially in the morning when the engine is first started, white smoke will be released, which will turn into blue smoke after the car is warmed up and will soon become colorless. This is a normal phenomenon, to be distinguished from defects.
(7) While the vehicle is driving, if the engine suddenly becomes weak and a large amount of white smoke comes from the exhaust, this is usually due to fuel overflow. too late.
The analysis of the main reasons includes: the connecting screw on the fuel injection pump coupling is loose or the steel part is broken; the air compressor shaft is broken;
3. Blue smoke escapes from the exhaust pipe
Formation of blue smoke: engine oil enters the combustion chamber and is burned and then discharged from the pipe exhaust.
Analysis of the cause of the failure:
(1) The oil seal of the intake valve is not tightly sealed, and the oil enters the oil chamber. combustion and burns.
(2) The piston ring loses its elasticity or breaks; the cylinder liner is badly worn and oil is leaking into the combustion chamber. In this case, a large amount of exhaust gas will usually come out. of the exhaust pipe.
(3) The sealing ring at the end of the compressor wheel of the compressor is not tightly sealed., organic oil enters the combustion chamber of the cylinder for combustion.
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When the diesel generator is working, the temperature of the exhaust pipe is approx.iron 500 degrees, and the exhaust pipe is wrapped. The main function of the insulation material is to prevent the temperature of the exhaust pipe from dissipating into the computer room, thereby lowering the temperature of the computer room, so that the unit can operate in a normal outdoor environment. The flue pipe is too long, this won't be a big problem as long as it doesn't affect the temperature of the unit. If the flue pipe is too long, it will harm the unit. enlarge the flue pipe to reduce resistance.