Abstract
Maintaining rotor stability and reducing bearing wear hold practical significance for the rotor system. However, the dynamic properties of rotor system supported by dry friction bearings are unknown, hindering effective bearing optimization. To tackle this issue, a 5-degree-of-freedom dynamics model is established for the motor rotor system of the outdoor unit supported by porous bearings. The rough surface damping contact model is employed to calculate the contact performance of the dry friction bearings. The effects of bearing edge modification on system dynamics and bearing wear properties are investigated and compared with well-lubricated bearings. The results demonstrate that an appropriate amount of edge modification can decelerate the impact between the rotor and the bearings and reduce wear under dry friction conditions.
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