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Generator unit silencing works


Release time:

2024-06-13

When the operating speed of a generator set is 1500rpm, a noise of 105 decibels will be generated at a distance of one meter from the generator set. In order to avoid noise from the machine room, the silencing project should include the following links: 1. room access door silencer: Each computer room has at least one entrance and exit door. From the perspective of noise reduction, the door of the computer room should not be set too much. Generally, one door and one small door should be set up, with an area of no more than 3 square meters as much as possible. The structure is framed by metal, with high-strength sound insulation materials attached inside and metal iron plates outside. The noise reduction door is closely matched with the wall and door frame up and down. 2. diesel engine air intake system silencing: When the diesel engine is working, there must be enough air intake to maintain the normal operation of the unit. Generally, the air intake system should be set directly opposite the fan exhaust port of the unit. According to our experience, the air intake adopts the forced air intake method, and the air intake passes through the silencer air duct. The blower is drawn into the machine room. 3. diesel engine exhaust system silencer: When the diesel engine is cooled by the water tank fan system, the heat of the water tank radiator must be discharged out of the machine room. In order to avoid noise from the outside of the machine room, the exhaust system must be equipped with an exhaust muffler air groove. 4. room outside the diesel engine exhaust system silencing: After the exhaust air of the diesel engine is silenced by the exhaust silencer duct, there is still high noise outside the engine room. The exhaust air must be silenced by the silencer duct set outside the engine room, so as to minimize the noise. The exterior of the silencer duct is brick wall structure and the interior is sound-absorbing board. 5. diesel engine exhaust muffler system: The exhaust gas emitted by the diesel engine produces a certain amount of noise. We add a muffler to the exhaust gas emission system of the unit. At the same time, the exhaust muffler pipes are all wrapped with fireproof rock wool material, which can reduce the heat emitted by the unit to the machine room and reduce the vibration of the unit, so as to achieve the purpose of attenuating noise.

When the operating speed of a generator set is 1500rpm, a noise of 105 decibels will be generated at a distance of one meter from the generator set. In order to avoid noise from the machine room, the silencing project should include the following links:


1. room access door silencer:
Each computer room has at least one entrance and exit door. From the perspective of noise reduction, the door of the computer room should not be set too much. Generally, one door and one small door should be set up, with an area of no more than 3 square meters as much as possible. The structure is framed by metal, with high-strength sound insulation materials attached inside and metal iron plates outside. The noise reduction door is closely matched with the wall and door frame up and down.


2. diesel engine air intake system silencing:
When the diesel engine is working, there must be enough air intake to maintain the normal operation of the unit. Generally, the air intake system should be set directly opposite the fan exhaust port of the unit. According to our experience, the air intake adopts the forced air intake method, and the air intake passes through the silencer air duct. The blower is drawn into the machine room.

 

3. diesel engine exhaust system silencer:
When the diesel engine is cooled by the water tank fan system, the heat of the water tank radiator must be discharged out of the machine room. In order to avoid noise from the outside of the machine room, the exhaust system must be equipped with an exhaust muffler air groove.

 

4. room outside the diesel engine exhaust system silencing:
After the exhaust air of the diesel engine is silenced by the exhaust silencer duct, there is still high noise outside the engine room. The exhaust air must be silenced by the silencer duct set outside the engine room, so as to minimize the noise. The exterior of the silencer duct is brick wall structure and the interior is sound-absorbing board.

 

5. diesel engine exhaust muffler system:
The exhaust gas emitted by the diesel engine produces a certain amount of noise. We add a muffler to the exhaust gas emission system of the unit. At the same time, the exhaust muffler pipes are all wrapped with fireproof rock wool material, which can reduce the heat emitted by the unit to the machine room and reduce the vibration of the unit, so as to achieve the purpose of attenuating noise.

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The throttle cannot be slammed after the diesel engine is cold started.

Insufficient cooling water of diesel generators will reduce their cooling effect, and the diesel engine will overheat due to lack of effective cooling; excessive cooling water and oil temperature will also cause the diesel engine to overheat. At this time, the main thermal load of the diesel generator cylinder head, cylinder liner, piston assembly and valve is heavy, and its 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 stuck parts may occur. The overheating of the diesel generator will also worsen the combustion process of the diesel engine, causing the injector to work abnormally, the atomization is poor, and the carbon deposit increases. After the diesel generator set is turned off, the circulation of the cooling system water stops, the heat dissipation capacity is sharply reduced, and the heated parts lose cooling, which is easy to cause the cylinder head, cylinder liner, cylinder block and other parts to overheat, produce cracks, or cause the piston to expand excessively and get stuck in the cylinder liner. Inside. On the other hand, when the diesel generator stops without idling cooling, the friction surface will contain insufficient oil, and when the diesel engine starts again, it will aggravate the wear due to poor lubrication. Therefore, the diesel generator should be unloaded before flameout, and gradually reduce the speed, no-load operation for a few minutes. If the throttle is slammed, the speed of the diesel generator will rise sharply, which will cause some friction surfaces on the aircraft to wear severely due to dry friction. In addition, when the throttle is hit, the piston, connecting rod and crankshaft receive large changes in force, causing severe impact and easy damage to the parts. When the diesel generator is cold-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 idle speed after cooling and start to heat up, and then run with load when the standby oil temperature reaches 40 ℃ or above; the machine should start with a low-speed 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 converted to normal driving. The diesel engine runs when the oil is insufficient. At this time, the 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 the start of 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 due to lack of oil.

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The working principle of silent generator

The working principle of the silent generator is basically the same as that of other generators, but it is different in terms of appearance and internal design. The silent generator usually consists of two main parts: the generator and the sound box. 1. Generator The generator is a device that converts mechanical energy into electrical energy, and it is also the core component of the silent generator. The generator usually consists of two parts, a rotating rotor and a stator. In the generator, the rotor generates electromotive force relative to the stator through the magnetic field, thereby generating electrical energy. 2. Static sound box The sound box is part of the sound insulation design and is usually composed of sound insulation materials and sound insulation structures. The interior of the sound box is divided into two soundproof rooms, one is the engine room and the other is the generator room. The engine room and the generator room are connected by an air passage. A fan blows air from the engine room to the generator room to maintain circulating ventilation. This removes exhaust gases, maintains operating temperature and extends generator life.

2024-06-13