What is the working principle of diesel generator muffler noise reduction?

Introduction What is the working principle of diesel generator muffler noise reduction? Diesel generator silencer is developed based on the silencer principle composed of resistance, injection and resistance. It has the characteristics of large sound attenuation, smal

What is the working principle of diesel generator muffler noise reduction?

The diesel generator silencer is developed based on the composite silencer principle of strength, spray and resistance. It has the advantages of large sound attenuation, small size, light weight, the muffler tube is made of stainless steel, is not easy to install. corrodes and is easy to install. The sound wave is attenuated through the expansion cavity and the perforated plate, so that the sound is transformed into thermal energy and disappears. The principle is mainly to adopt multi-stage throttling and pressure reduction. After checking the flow rate in the silencer, the level is high. -Pressurized steam enters the pressure reducing body and undergoes large volume expansion. As a result, a weak vapor is formed and then ejected. During this process, the internal energy of the air flow is partially converted into sound energy of a certain frequency. the noise ist considerably attenuated. In an ejection and mixed flow silencer shell, 2 to 4 silencers are arranged in the center. The inner tank can suppress noise. The inner tank shells can move vertically and horizontally to absorb thermal expansion of the exhaust pipe. The multi-layer sound-absorbing cover is designed outside the pressure reducing body.

A silencer is a device that blocks the propagation of sound and allows air flow to pass. This is an important measure to eliminate dynamic noise caused by steam emissions. To measure the quality of an exhaust silencer, we mainly consider the following three aspects:

1. The noise reduction ability of the muffler can meet the requirements of “Noise Hygiene Standard for Industrial Enterprises”

2. The adaptability of the silencer (i.e. adaptability to low-spectrum broadband andmedium, high temperatures and high pressures, etc.);

3. Structural performance of the silencer. (Reasonable size, low cost, long service life, etc.)

Diesel exhaust muffler is suitable for silencing and reducing noise on the exhaust pipe of diesel generators, and is also suitable for other exhaust systems containing a certain amount of smoke and dust in the middle.

Generally speaking, diesel generators are generator sets. There are two specific methods of noise reduction. One is to use sound insulation covers to reduce noise, and the other is to carry out noise reduction on the generator sets provided. in the room.

If a soundproof cover is used, the soundproof cover of the diesel generator generally uses a metal steel plate as the outer layer of sound insulation protection, and the inner layeruses a sound-absorbing perforated metal plate to emit sound. - absorbing role, and is used between the two layers of plates Vibration damping and absorption materials and sound-absorbing materials are used to fill the entire soundproof cover plate with various noise reduction effects. At the same time, vibration-absorbing pads must be. used in soundproof cover, machine and floor. After all, diesel engines vibrate a lot.

For diesel generator sets with engine room, the engine room is equivalent to a soundproofing blanket. At this time, the engine room can be soundproofed and decorated. Take soundproofing and sound insulation measures for the ceiling and four walls of the engine room, install and install sound-absorbing materials, use high-efficiency vibration damping pads for diesel engines, installs silencer or silencer blinds at the air inlet. and exit from the engine room, and install explosion-proof soundproof doors and windows on the walls.

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