关键词: 轴承-转子系统, 圆度误差, 稳定性, 摩擦功率损耗

Abstract:

A dynamics model of hydrodynamic bearing rotor system with
roundness errors was established,and the finite difference method was utilized to solve
Reynolds equation to obtain oil-film pressure and oil-film load carrying capacity.
The calculation method of axis orbit of hydrodynamic bearing rotor system where
the roundness errors were taken into consideration and the judgment of instability onset
speed were presented.The dimensionless operation parameter op was
calculated to obtain the stability maps which were widely accepted.The system
stability maps of some different extents of roundness errors and friction power loss curve were
presented.The results show that the ellipse errors have significant effect on the power
loss of friction.The friction power loss of the system becomes lower when the
eccentricity is within the range of 0.5 to  0.7.

Key words: hydrodynamic elliptic bearing rotor system, roundness error, stability, friction power loss