Solutions to noise reduction of diesel generator set
Solutions to noise reduction of emergency generator the types of electric power generation is a kind of mechatronics equipment that converts the chemical energy of fuel into electrical energy. Today, with the increasing modernization, especially with the vigorous development of computer networks and communications, the equipment also has requirements for the reliability of power supply. Increasingly, because the UPS power supply has the problem of short power supply time. This makes diesel generator sets have a broad space for development, but while diesel silent generator provide convenience for people, the noise of the generator sets directly affects people's health, work and life. With the gradual improvement of people's environmental requirements, how to solve and overcome the above problems has become the key to the application and development of diesel generator sets. Here we focus on the occurrence and solutions of diesel generator sets. According to the working principle of diesel generator sets, the generation of noise is very complicated, which can be divided into the reasons and locations: 1. Exhaust noise; 2. Mechanical noise; 3. Combustion noise; 4. Cooling fan and exhaust noise; 5 .Inlet wind noise: 6. Generator noise. The following is an explanation of these six parts: 1. Exhaust noise: Exhaust noise is a high-temperature, high-speed pulsating airflow noise, which is the most energy and component part of engine noise. It is much higher than the intake noise and the mechanical noise radiated by the body, and it is the most important part of the total engine noise. Its fundamental frequency is the firing frequency of the engine. The main components of exhaust noise are the following: low-frequency pulsating noise caused by periodic exhaust smoke, air column resonance noise in the exhaust pipe, Helmholtz resonance noise of the cylinder, high-speed airflow through the valve gap and tortuous pipes When the noise, eddy current noise, and the regenerated noise generated by the pressure wave in the exhaust system are excited by the pressure wave in the pipe, the noise frequency increases significantly with the increase of the airflow speed. 2. Mechanical noise: Mechanical noise is mainly caused by the gas Vibration or mutual impact caused by the periodic changes of pressure and motion inertia force, the most serious of which are the following: the noise of the piston crank connecting rod mechanism, the noise of the valve train, the noise of the transmission gear, and the unbalanced inertia Mechanical vibration and noise caused by force. The strong mechanical vibration of the diesel generator set can spread to various places outdoors through the foundation long distance, and then form noise through the radiation of the ground. This kind of structural noise spreads far and attenuates, and once it is formed, it is difficult to isolate it. 3.Combustion noise: Combustion noise is the structural vibration and noise produced by diesel fuel during...
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