Noise analysis of diesel generator set

The noise of the diesel generator set is composed of a variety of sound source complex sound source.According to the way of noise radiation, can be divided into the aerodynamic noise, surface radiation and electromagnetic noise.According to the production reason, diesel generating sets surface radiated noise can be divided into combustion noise and mechanical noise again.Lifting the aerodynamic noise is the diesel generator set noise of main noise sources.
1. The aerodynamic noise is due to the unsteady process of the gas, which is by the disturbance of the gas and gas interact with objects of the noise of the diesel generator set.The aerodynamic noise directly to the atmospheric radiation, including air intake and exhaust noise and cooling fan noise.
2. The electromagnetic noise is generated by the generator rotor high-speed rotation in the electromagnetic field of the noise of the diesel generator set.
3. The combustion noise and mechanical noise is difficult to distinguish between, is usually due to diesel generator set combustion formation pressure in the cylinder by cylinder head, piston, connecting rod, crankshaft, the body to the outside noise radiation of diesel generating set is called combustion noise.The piston of the cylinder liner strikes and movement of the mechanical vibration of diesel generator set noise called mechanical noise.Generally di diesel engine combustion noise than mechanical noise, instead of a di diesel engine mechanical noise is higher than that of combustion noise.But low speed combustion noise were higher than that of mechanical noise.