Noise reduction in the engine room to solve the noise of the generator set

How to solve the generator's noise? Let's take a look at the room noise reduction proposed by Dokang Generator Co., Ltd. today!

1. Methods to reduce noise and measures used for noise reduction and noise reduction

At present, noise reduction methods at home and abroad include sound insulation, noise elimination, sound absorption, damping, vibration reduction, etc. The noise reduction project adopted by our company adopts all the above measures, and its unit operation noise meets the requirements of environmental protection.

2. Measures and main materials used for noise reduction and noise reduction

The sound absorption part of noise reduction in the engine room: The room is generally surrounded by 240mm thick brick wall, cement floor flat top, in order to reduce the noise in the engine room, in the room surrounding the wall and the inner wall of the roof need to be sound absorption processing, as follows:

Around the wall: U-shaped dragon skeleton, sound-absorbing cotton, glass cloth, perforated sound-absorbing panels (thickness not less than 0.6MM), etc., are covered with a 100--120mm sound-absorbing wall around the wall.

The inner wall of the roof: Use a U-shaped dragon skeleton, sound-absorbing cotton, glass cloth, perforated sound-absorbing aluminum plate (thickness not less than 0.6mm), etc. Hang a layer of 120--150mm sound-absorbing layer under the roof, which can reduce the Room noise 10-15 DBA.

The noise reduction section of the equipment room: To prevent the transmission of noise in the equipment room, the door of the equipment room must be sealed for sound absorption and sound insulation. The average noise reduction of a typical single-layer door is TL = 15-20 DBA. The average noise reduction of the door is TL=25-35DBA, and the average noise reduction of the special double doors can reach TL=35-45DBA. The special soundproof door is specially designed, manufactured and installed according to the noise characteristics of the diesel generator set. Sealed between door and door frame.

Damping of the generator set: The conventional ground anchor screw is not used for the steel connection between the generator base frame and the ground foundation, and the special rubber spring shock absorber for the high-performance diesel generator sets can reduce the noise by 5-10 DBA.

Ventilation inside the equipment room: The ventilation of the equipment room is the key to the success of the engine room silencing and noise reduction project, and it is also a prerequisite for the normal operation of the diesel generator set. While satisfying the noise reduction effect, the diesel generator set must be considered for the ventilation requirements of the engine room. Since the diesel generator sets require a large amount of fresh air during operation, the exhaust and exhaust ducts of the engine room must be designed to meet the requirements. Intake and exhaust ducts were spread out of the engine room. The reasonable design of the inlet and outlet ducts is an important part of noise reduction. Both the inlet and outlet ducts of the diesel generator set use the folded brick ducts, a special inlet muffler and an exhaust muffler, and the inner cavity is equipped with sound-absorbing devices. Materials and perforated sound-absorbing panels, at the same time to ensure that the unit can operate normally at rated power for a long time, the inlet and outlet of the unit must reserve sufficient exhaust area according to the requirements of the unit, and the low-noise axial flow of the unit's exhaust pipe is installed. Fans, in order to ensure that the room has enough ventilation, through the above means is expected to reduce noise to 25-30DBA.

Exhaust noise is the main noise source of the unit. The use of two mufflers in series for secondary muffler is expected to reduce TL = 30-40 DBA. On the other hand, the exhaust pipe connection must have good sealing performance. Part of the noise is discharged through the exhaust pipe. To the atmosphere.

In order to prevent the unit from operating for a long time, the temperature of the engine room will rise, affecting the output power of the unit, and the exhaust gas exhaust pipe and exhaust muffler of the unit will be insulated and insulated.

In order to ensure that the engine room meets the fire protection requirements, the lighting of the engine room shall be installed in accordance with the fire protection requirements.

After the above methods of muffler, sound insulation, and sound absorption, the noise at the 1M site outside the noise floor of the computer room can be no more than 65 DBA.