Skip to main content

Main Noise Sources of Diesel Generator


The noise of diesel generator mainly comes from diesel engine and generator. In order to reduce the noise of generator set, the main noise source should be controlled, and the key to the control is to find the main sound source accurately.




I Main noise sources of Diesel engines

1. Intake and exhaust noise

Intake and exhaust noise is the strongest noise source of diesel engine.

The intake noise is mainly the pressure pulsation of air in the intake pipe, the low frequency noise, the high frequency eddy current noise produced by the air flowing through the inlet valve section at high speed, and the noise of the turbocharger compressor of the turbocharged diesel engine.

The exhaust noise is mainly the pressure pulsation of exhaust gas in the exhaust pipe, which produces low and medium frequency noise, and the high frequency eddy current noise at the flow section of the exhaust valve.

2. burner noise

The combustion of combustible mixture in cylinder causes the rapid change of gas pressure, which causes the piston, cylinder head, connecting rod, piston pin, crankshaft and other parts to be subjected to impact load, resulting in structural vibration and noise.

3. mechanical noise

Due to the periodic changes and impact of the forces between the parts of the diesel engine, the surface vibration produces noise. The mechanical noise increases rapidly with the speed of the engine. The main parts of the mechanical noise are piston, cylinder head, cylinder block, cylinder liner, connecting rod, piston pin, crankshaft, valve train, gear, spray. The design of the components, the quality of the manufacturing and the selection of materials have an important effect on the noise. The structural stiffness of the diesel engine, the speed of the engine and the clearance of the moving parts are the main factors affecting the mechanical noise.

II Main noise sources of generators

1. ventilation noise

Electromagnetic noise is caused by the interaction of stator and rotor magnetic field in the air gap of generator to produce radial force varying with time and space, which causes the stator core and seat to deform periodically and cause vibration and noise.

2. electromagnetic noise

Electromagnetic noise is caused by the interaction of stator and rotor magnetic field in the air gap of generator to produce radial force varying with time and space, which causes the stator core and seat to deform periodically and cause vibration and noise.

3. mechanical noise

The mechanical noise of generator includes mechanical vibration and noise caused by centrifugal force caused by rotor mechanical imbalance, vibration noise of bearing, sliding contact noise of brush collector ring or commutator, axial vibration noise of end cover excited by bearing vibration.
标签：

Comments

Post a Comment

Popular posts from this blog

Diesel Generator Power Ratings: Standby vs Prime vs Continuous

Diesel generator sets are commonly used in a variety of sectors due to their dependable performance and high efficiency. They can be used for emergency power supply in the event of a power cut or used in places without connection to a power grid. When selecting a diesel generator for your home or business, you need to consider many factors, such as generator’s ratings. In this article, we’ll explain the three basic rating types - standby, prime, and continuous in diesel generators. ISO-8528-1:2018 defines basic generator set rating categories based on four operational categories: Emergency Standby Power (ESP), Prime Power (PRP), Continuous Power (COP) and Limited-Time Running Prime (LTP). Read on and learn the application of power ratings for engines used in generating sets. Standby Power Rating Standby Power(ESP) is used to supply emergency power when the external power supply is interrupted, such as power outages. Standby power rated generators can supply reliable electricity as t...
Post a Comment
Read more

How to Choose a Household Mini Generator

With the improvement of people's living standards, there are more and more household appliances, such as rice cookers, microwaves, kettles, refrigerators, air - conditioners, washing machines, etc. It can be said that every household has them. But what if there is a power outage? These appliances won't work properly, and our lives will be greatly disrupted. How can we avoid this? We can use household mini - generators to provide convenience in power consumption. So, how to choose a good household mini - generator? Consider the noise level Since it is for household use, when choosing a household mini - generator, we need to check whether the noise will affect the neighbors. Generally, the seller will demonstrate the performance of the generator in advance. A good household generator can reduce noise by about 80%. Choose a generator with a moderate price Due to different brands, there are significant differences in power, and consequently, the price differences of househ...
Post a Comment
Read more

How to Choose Efficient Diesel Generators for the Film and Television Industry?

In the film and television industry, the stability of the electricity supply during filming is crucial. Whether the equipment are the cameras or the lighting equipment on the filming site, or the post-production equipment, they all need stable and reliable power support. Unstable or interrupted power can result in interrupted filming, damage to equipment, and even affecting the progress and quality of the entire project. Therefore, investing in high-efficiency diesel generator sets has become an important measure for the film and television industry to ensure the reliable power supply for shooting. Determine the power requirements Before choosing a diesel generator set for the film and television industry, it’s necessary to figure out the total power needs, including the electricity demand of the shooting location, the total power of the electrical equipment and the time of using electricity. Also consider whether there are special needs for the generators such as low noise level and...
Post a Comment
Read more