Reasons And Solutions For Noise Of Diesel Generator Sets

As we all know, the diesel generator sets we use cannot be too noisy. If the sound is too loud, it will inevitably affect our normal work and life. However, it is also unavoidable that the generator set will have problems such as increased noise after being used for a period of time. Then we need to understand where the noise source is and the correct way to reduce the noise. Today, the editor of Dingbo Electric will popularize it for you.

Sources of Noise from Diesel Generator Sets

1. Emanating from the engine shell. The general frequency is about 500 - 3KHz, and the noise value is different under different engine speeds. Generally, when the speed increases by 2 times, the noise value increases by about 9 - 12 decibels.

2. Overflowing from the air intake and outlet. The difference under load and no - load conditions is about 10 - 15 decibels. The noise value at a frequency of 2k - 4k is larger than the noise characteristic. Generally, 90% of the intake air volume is used for cooling and 10% is used for combustion.

3. From the engine exhaust port. The difference under load and no - load conditions is about 10 - 15 decibels. The main frequency noise is (speed/60)x(number of cylinders/2). In addition, generally, if two emission - type mufflers are required, one is a reaction - type muffler to reduce low - frequency noise, and the other is an acoustic - absorbing muffler to absorb high - frequency noise. The former can be placed inside the sound - proof cover, and the latter can be placed outside the sound - proof cover to save space.

4. From the cooling fan and other auxiliary equipment. The noise value of this part is not much compared with the aforementioned values, and generally can be ignored.

How to Reduce the Noise of Diesel Generator Sets

1. Reduce the noise at the sound source.

2. Control the propagation path of noise. It is generally difficult to achieve the method of reducing the noise at the sound source, so it can only be dealt with in its propagation path. The key to controlling the propagation path of noise is to use the natural attenuation of sound waves during propagation to reduce noise pollution. There are several specific measures:

(1) Sound absorption

(2) Sound insulation

(3) Change the propagation direction of noise.

In actual projects, according to needs, sometimes one of them is used, and sometimes all three methods are used together. Most of them adopt the combination of the three methods, such as sound absorption and sound insulation treatment for the air inlet and outlet; changing the propagation direction of noise at the exhaust outlet; sound absorption treatment for walls and ceilings, etc. The generator manufacturer Dingbo Electric reminds users here that while controlling the noise in the engine room, attention must be paid to the ventilation, heat dissipation, lighting and illumination of the engine room.

As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via [email protected].