Oil vibration action by a half-speed vortex evolved, that is, when the rotor speed rose to twice the first critical speed, the whirl frequency coincide with the rotor natural frequency, so that the rotor bearing system resonance oscillation, if they can improve the first critical speed of the rotor, so that more than 0.5 times the speed, you can avoid the oil whip, but it obviously can not be achieved. Only increase the bearing load, so that the journal at a large eccentricity, improve bearing stability of the approach to resolve.

Measures taken:

a) In the oscillation occurs, increase the oil temperature, reducing the viscosity of the lubricant.

b) in the journal eccentricity on the tile hydraulic watt load to increase, thereby increasing the stability of the bushing.

c) Adjustment of the relative height of the bearing.