scope:

The present guideline provides an overview of the typical vibration patterns found with machine sets in hydraulic power stations for energy generation and in pumping installations, for example, for the drinking water supply. These machine sets consist of turbines and generators, of pump-turbines and motor-generator sets, possibly with starting motors, or of electric motors and high-pressure pumps. Pump-storage machine sets also include machine sets consisting of turbines, motor-generator sets and pumps which can be coupled or uncoupled. As a rule the various machines are connected rigidly together and often share the same bearings. Their shafting can be horizontal, vertical or also be inclined at any angle.

Guideline VDI 3839 Part 6 does not, however, provide information about the special vibration patterns of pumps in industrial installations. These will be dealt with in Part 7.

If the hydraulic machines we have mentioned are connected with generators or electric motor via radially flexible couplings and each has its own bearings, the information in this guideline will only apply to the hydraulic machines. Information applicable to the coupled generators or motors will be found in Part 5.