Design of deceleration dynamics and tribology of a high speed rotor (original) (raw)

Abstract

The deceleration dynamics and tribology of a high speed rotor system are studied. The rotor is vertical and in normal operation it is supported by magnetic bearings. In emergency braking cituations it should be stopped fast with minimal radial and axial damage to a ring sliding bearing. A list of feasible tribological material pairs are tested by simulation for selecting the best ones for field tests. Wear rates and wear volumes under various assumptions are estimated and also power consumptions and temperature rises. Dynamic behaviour of the rotor bearing system is studied using analytical modelling and simulation solution and also using a multibody 3D dynamics program Working Model. The simulations are used to design the experimental testing. There is a need for more quantitive material models and interdisciplinary design when designing tribological advanced high speed products. Present tools give reasonable results but integrated design tools are needed.

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