上柴The main noise source for diesel generator sets is diesel engines, including exhaust noise, mechanical noise and combustion noise, cooling fans and exhaust noise, intake noise, generator noise and ground vibration. transfer. When a diesel generator is running, it typically produces 95-128 dB(A) of noise. If noise reduction measures are not taken, the noise generated by the unit will cause serious harm to the surrounding environment. In order to protect and improve the quality of the environment, it is necessary to control the noise.
1. Exhaust noise.
Exhaust noise is a high temperature, high speed, pulsating airflow noise. It is a lot of energy in engine noise. The noise can reach more than 100 decibels. It is a very important part of the total engine noise. The exhaust noise generated by the Shangchai diesel generator set is directly discharged through a simple exhaust pipe (the original exhaust pipe of the generator set). As the wind speed increases, the frequency of noise increases significantly, which has a serious impact on the lives and work of the surrounding residents.
2. Mechanical noise and combustion noise.
Mechanical noise is mainly caused by vibration or mutual influence caused by periodic changes of gas pressure and inertial force during the moving parts of the engine. It has the characteristics of long noise propagation and low attenuation. Combustion noise refers to the structural vibration and noise generated by diesel during combustion.
3. Cooling fan and exhaust noise.
The unit fan noise consists of eddy current noise, rotational noise and mechanical noise. Exhaust noise, airflow noise, fan noise, and mechanical noise are transmitted through the exhaust passage, causing noise pollution to the environment.
4. Intake noise
The role of the intake passage is to ensure the normal operation of the engine and create a good heat dissipation for the unit itself. condition. The intake passage of the unit must allow the intake air to enter the cabin smoothly, and the mechanical noise and airflow noise of the unit are radiated to the outside of the cabin through the intake passage.
5.Basic vibration transmission noise
The strong mechanical vibration of Shangchai diesel generator set can be transmitted to the outdoor area through long distance basis And then radiate noise through the ground.
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