The Reason of Excessive Vibration of Silent Generator

When the silent diesel generator set is running, it will have a large vibration phenomenon, which seriously affects the daily life of nearby residents. What is the cause of the vibration phenomenon? Diesel generator set is composed of electrical and mechanical parts. Therefore, its faults should also be analyzed as one. The cause of vibration failure of diesel generator set is also divided into two parts: generally speaking, the vibration of silent diesel generator set is caused by the unbalance of rotating part, electromagnetic or mechanical failure.

1. Unbalanced rotating part:

It is mainly caused by the unbalance of rotor, coupler, coupling and transmission wheel (brake wheel).

The solve way is to find the rotor balance first. If there are large transmission wheels, brake wheels, couplings and couplings, they should be balanced separately from the rotor. Another reason is the mechanical looseness of the rotating part. For example, loose iron core support, failure and looseness of diagonal key and pin, and loose binding of rotor will cause unbalance of rotating part.

2. Electrical failure:It was caused by electromagnetic reasons.

It mainly includes: stator wiring error of AC Silent generator, rotor winding short circuit of wound asynchronous motor, inter-turn short circuit of excitation winding of synchronous diesel generator set, excitation coil connection error of synchronous diesel generator set, broken rotor bar of cage asynchronous motor, rotor core deformation, uneven air gap between stator and rotor, air gap flux imbalance and vibration.

3. Structural defects and installation problems of diesel generator. This kind of failure is mainly manifested in the elliptical journal, bending shaft, too large or too small clearance between shaft and bearing bush, insufficient rigidity of bearing pedestal, foundation plate, some part of foundation and even the entire generator installation foundation, loose fixation between generator and foundation plate, loose foundation bolts, loose bearing pedestal and foundation plate, etc. Too large or too small clearance between shaft and bearing bush can not only cause vibration, but also cause abnormal lubrication and temperature of bearing bush.

4. The load conducted vibration driven by silent diesel generator. For example, the vibration of the steam turbine of the steam turbine generator, the vibration of the fan and water pump driven by the generator cause the vibration of the generator.

The above is the reason why Dingbo Power introduced to you about the excessive vibration of the silent diesel generator. If you want to know more about the diesel generator, please contact us via email: dingbo@dieselgeneratortech.com.