Abstract: The relation curve is analyzed qualitatively between the rotor shaft of oil transfer pump unit operation situation and relative vibration energy of swivel double-ended points, and it is similar to “the bathtub curve” except to an extra breakpoint. The multi-measuring points, multi-channels vibration signals of axle centre trail is used to integrate three-dimension axle centre trail, based on this, the relative vibration energy of swivel double-ended points is obtained, which includes two index information, the phase and axle centre trail radius. Then the energy index, root-mean-square which can be reacted the energy of the relative bounce amount is also obtained. Based on a lot experiment, the relation between the index and the unit situation is proved to similar to the qualitative analysis result. So the feasibility is proved, the method can be used to analyze the operation situation of rotor system.

Key words: rotor shaft of oil transfer pump, three-dimension axle centre trail, relative bounce amount, relative vibration energy, petroleum machinery