A diesel generator set is a power source integrated by diesel engine, electric generator, air cooling apparatus, filter, silencer and hydrostatic pump. In its working process, the reciprocating motion of the piston rod device of the diesel engine and the periodic torsional vibration formed in the torque outputting process will lead to the coupled vibration of the set and the accessories, which will directly influence the stability of the vehicle and the riding comfort and even influence the traffic safety when the condition is serious. To reduce the influence of the vibration of the bottom equipment on the vehicle, it is necessary to research and analyze the vibration isolation performance of the vibration isolation system of the diesel generator set.
On the rigid condition of satisfying the suspension system of the diesel generator set, change the second-level vibration isolator. As the vibration frequency of the diesel generator set is in the ranges of 10~1000 Hz, vibration velocity is generally used as the standard to assess the vibration degree, for this reason, the vibration attenuation condition can be visually reflected through comparing the vibration speed of the set, framework and basic rack before and after changing the vibration isolator.
With the increase of the rotating speed of the diesel engine, the vibrating velocity of the generator set will increase, and the vibration attenuation before and after the vibration isolation will also gradually increase, which means that with increase of the excitation frequency, the vibration isolation effect will be better.
Within the rotating speed of the diesel engine, the vibration isolation performance of the single-layer vibration isolation system is not as good as that of the double-layer one, and there is exaggerated vibration in some excitation frequency. The vibration isolation performance of the vibration isolation system in the high frequency stage is superior to that of the low frequency stage. On the premise of satisfying the rigid requirement of the system, the vibration isolation performance of the vibration isolation system with smaller stiffness value is superior to that of bigger stiffness value.