What is a low noise generator and how does a generator reduce noise?

The low-noise diesel generator set has significant low-noise performance, and the multi-layer shielding impedance mismatched acoustic enclosure reduces the impact of noise on users. Large-capacity fuel tank, special quick-open cover, easy maintenance and other features.

Features: 1. Vibration damping facilities, high-performance shock absorbers are used between the diesel engine and the generator and the bridge to reduce the noise generated by vibration.

2. Sound insulation cover, using four to five layers of sound-absorbing materials of sound insulation cover, sound absorption and sound insulation, the effect is obvious.

3. Air inlet muffler, a labyrinth air inlet muffler with three layers of sound-absorbing materials, not only ensures the sufficient entry of fresh air, but also effectively seals the noise.

4. Exhaust muffler, a labyrinth exhaust muffler with three layers of sound-absorbing materials, not only ensures the smoothness of exhaust, but also effectively seals the noise propagation.

5. The use of exhaust muffler and impedance composite muffler greatly reduces the noise when exhaust gas is discharged.

6. The power cable connection adopts a fixed junction box structure, which is directly connected outside the box.

In addition, the structure of the acoustic cover door is similar to that of the acoustic cover, the window is made of double glazing, and the doors and windows are strictly sealed with the acoustic cover to seal the noise to the greatest extent.

It's a very low-noise generator.

If the maximum limit is reached, it constitutes disturbance and reform. In the national "Urban Area Noise Standard", the maximum limit of environmental noise in five types of urban areas is clearly stipulated:

Recuperation area, high-end villa area, high-end hotel area, 50db (decibels) during the day, 40db at night (from 22 o'clock to 6 o'clock the next day, the same below);

In areas dominated by residential, cultural and educational institutions, 55db during the day and 45db at night;

There are several options to control noise levels.

1. Smoke exhaust silencer: The smoke exhaust silencer will reduce the noise level of the diesel engine. Different levels of silencers have different silencing effects, and these silencers are divided into four types: industrial environment, home environment, high requirements, and ultra-high requirements.

2. Shell: The function of the shell is to prevent rain; The second is noise reduction, and these enclosures can be specially designed to meet special noise level requirements.

3. Other ways to reduce noise: When the generator is installed in the building, there are a variety of noise reduction equipment such as muffler box, partition ventilation, fan sound absorber and wall sound absorbing materials, which can reduce noise.

The most fundamental way to reduce the noise of the generator is to start from the sound source, and Lihui said that some conventional noise reduction technologies are used; For example, mufflers, sound insulation, sound absorption, vibration isolation, etc. are the most effective methods.

1. Reduce exhaust noise. Exhaust noise is the most important noise source of the unit, which is characterized by high noise level, fast exhaust speed, and difficult treatment. The use of a special impedance composite muffler can generally reduce the exhaust noise by 40-60 dB (A).

2. Reduce the noise of axial fans. When reducing the noise of the cooling fan of the generator set, two problems must be considered, one is the allowable pressure loss of the exhaust channel. The second is the required amount of sound reduction. For the above two points, a resistive chip muffler can be used.

3. Sound insulation, sound absorption treatment and vibration isolation of the unit in the computer room.

1) Sound insulation of the computer room. After the exhaust noise of the unit and the noise of the cooling fan are reduced, the main remaining noise source is the electrical and mechanical noise. The method adopted is to remove all the windows except for the necessary observation windows of the inner wall connected to the observation room, all holes and holes should be tightly sealed, and the sound insulation of the brick wall should be more than 40 dB (a).

The doors and windows of the computer room are fireproof and soundproof.

2) Air intake and exhaust. After the sound insulation treatment of the computer room, the ventilation and heat dissipation problem in the computer room should be solved. The air inlet should be set in the same straight line with the motor unit and the exhaust outlet.

The air inlet should be equipped with a resistive chip muffler, because the pressure loss of the air inlet is also within the allowable range, the air volume in the computer room can be naturally balanced, and the ventilation and heat dissipation effect is obvious.

3) Sound absorption treatment. The five walls in the computer room except for the ground can be treated with sound absorption, and the perforated plate resonance sound absorption structure is adopted according to the spectral characteristics of the power unit.

4) The communication of indoor air and the good sound insulation of the machine room will make the air in the room not get convection when the motor unit is shut down, and the high temperature in the room can not be lowered in time.

5) Unit vibration isolation. Before the installation of the motor unit, the vibration isolation treatment should be carried out in strict accordance with the relevant information provided by the manufacturer to avoid the long-distance transmission of structural sound, and the air sound should be continuously radiated during the propagation, so that the noise level at the plant boundary cannot reach the standard. For the existing power units that require treatment due to exceeding the standard, the vibration of the ground near the unit must be measured, and if the vibration sensation is obvious, the generator set must be isolated first.

If you want to know more specific operations and better noise reduction results, you can suggest finding a professional acoustic company to develop a suitable noise reduction plan.

The sound of machines in the factory, the sound is everywhere. However, when the sound exceeds a certain decibels, it will have a certain impact on the human ear. In modern metropolises, people's quality of life is gradually improving, and now we pay more attention to energy saving, environmental protection, low-carbon and pollution-free green life, so how will we avoid the noise generated when high-power generators are working?

Noise refers to the sound that is harmful to human health, noise can interfere with work efficiency, produce uneasiness, distraction, especially affect difficult work or high-skill work, it also hinders communication and warning signals, and causes accidents. While providing convenience for people, diesel generator sets also directly affect people's health, work and life because of the noise of diesel generator sets. 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.

In particular, noise is harmful to the operator's hearing, and sudden bursts of high noise can cause temporary hearing loss for several days in a row. Frequent exposure to higher levels of noise can lead to damage to the internal tissues of the ear and long-lasting, undesirable hearing loss.

The noise level in the vicinity of the uncovered diesel generator set exceeds the noise standard of the factory, and the operator should wear soundproof earmuffs and work clothes when working next to the diesel generator set.

If the engine room of the diesel generator set is equipped with soundproof equipment, it can prevent the indoor sound from transmitting to the outside and the outside sound from coming in, but all personnel working near the unit must wear soundproof earmuffs. (1) Mark the place where you need to wear soundproof earmuffs.

2) Within the scope of protection, it is necessary to control the entry of non-staff. (3) Ensure the provision and use of qualified sound-isolating earmuffs. (4) When the operator is working, pay attention to hearing protection.

Specific measures for noise control in the generator room include:

Silencing in generator exhaust flue: design two-stage damping silencer on generator exhaust flue according to installation;

Sound insulation at the generator exhaust outlet: install an air outlet sound-absorbing groove at the generator exhaust outlet; When the diesel engine is working, a large amount of heat is generated, and this heat should be pumped (discharged) out of the engine room to ensure that the temperature of the engine room does not exceed 50 degrees, so as to provide a normal working environment for the generator set.

Sound absorption at the air inlet of the generator: install a powered air inlet silencing groove above the back of the generator in the machine room; Each generator set needs a lot of fresh air when working, which is mainly used for diesel engine combustion and generator cooling.

Overall sound insulation in the computer room: install soundproof doors on the doors of the generator room, and install sound-absorbing and sound-absorbing materials on the walls.

If you want to reduce the noise of the generator, you can choose a silent box unit. Or build a generator set room.

If it is a small unit, it is recommended that you choose a silent box generator set, and a large unit is recommended that you build a generator set machine room for comparative accounting.

The above has Huali Electromechanical to answer for you.

There is no noise reduction straight to the engine open frame.

The silent model is equipped with triple noise reduction, external silent box, built-in flame retardant sound insulation cotton, and Osawa original silencer, which has very low noise. Moreover, the generator is also equipped with a voltage stabilizing device, which can bring some precision instruments and will not cause any damage to the equipment.

Generator noise control measures.

1. In order to meet the cooling air volume and combustion air volume required by the generator during operation, the air inlet muffler is installed at the air inlet.

2. The exhaust air muffler system in the computer room is installed, the hot exhaust air is forced to exhaust by using the cooling fan of the unit itself, and the exhaust muffler is installed at the air deflector.

3. The smoke exhaust and noise reduction system and heat insulation system of the unit are installed, and when the generator set is running, the exhaust gas generated by combustion is discharged from the smoke exhaust pipe and produces high-intensity noise, and the full-frequency and high-efficiency smoke exhaust muffler is reinstalled on the smoke exhaust pipe of the unit.

4. In the process of noise reduction in the computer room, both sound insulation and sound absorption should be considered, and the two can be combined into one to achieve a good noise reduction effect. Because the generator room is a brick concrete structure, the sound absorption coefficient is small, the sound absorption performance is poor, the sound reflection is strong, the reverberation is serious, and the sensory effect of people is not good. Remove the sound-absorbing layer in the original computer room, and re-set high-efficiency sound-absorbing materials on the walls and top surfaces of the computer room.

5. Installation of sound insulation system in the computer room.

In order to ensure the good sound insulation performance of the computer room, the sound insulation door designed according to the "equal transmission principle" is installed at the communication between the computer room and the computer room, and other holes that will cause sound leakage are blocked with brick walls.

Legal analysis: It is generally possible to find the noise maker who clearly proposes to stop the infringement, or to file a complaint with the Jujube Committee or the property management department. If it is not possible, according to the law, in violation of the legal restrictions on the prevention and control of noise pollution in social life, and the noise interferes with the normal life of others, a warning shall be given; If they do not make corrections after being warned, they shall be fined not less than 100 yuan but not more than 500 yuan.

So you can let the public security department solve it.

Legal basis: Public Security Administration Punishment Law of the People's Republic of China Article 58 Anyone who violates the legal restrictions on the prevention and control of noise pollution in social life and creates noise that interferes with the normal life of others shall be given a warning; and where corrections are not made after a warning, a fine of between 200 and 500 RMB is to be given.

Legal Analysis: Noise disturbance can be reported to the police.

Legal basis: Comply with the Law of the People's Republic of China on Public Security Administration Punishments》 Article 58 Anyone who violates the laws and regulations on the prevention and control of noise pollution in social life by creating noise to interfere with the normal life of others shall be given a warning; If the correction is not made after the warning, a fine of between 200 and 500 yuan shall be imposed.

Law of the People's Republic of China on the Prevention and Control of Environmental Noise Pollution》 Article 46 When using household appliances, musical instruments or other indoor entertainment activities at home, the volume shall be controlled or other effective measures shall be taken to avoid environmental noise pollution to the surrounding residents.

Generally, it is possible to find the noise maker who explicitly proposes to stop the infringement, or to file a complaint with the neighborhood committee or property management department. If it is not possible, according to the law, in violation of the legal restrictions on the prevention and control of noise pollution in social life, and the noise interferes with the normal life of others, a warning shall be given; and where corrections are not made after a warning, a fine of between 200 and 500 RMB is to be given. So you can let the public security department solve it.

Legal basis: Article 58 of the "Public Security Administration Punishment Law of the People's Republic of China" violates the legal restrictions on the prevention and control of noise pollution in social life, and creates noise to interfere with the normal life of others, and shall be given a warning; and where corrections are not made after a warning, a fine of between 200 and 500 RMB is to be given.