Abstract
Modeling, Analysis, and Simulation of Auxiliary Bearing for High-speed Rotating Machinery
Highlights
An active magnetic bearing (AMB) is one of the several industrial breakthroughs that have changed the traditional perception of rotating machinery
We discussed the radial and axial contact forces acting on an auxiliary bearing
The radial contact force can be reduced by using stiffness support and damping support
Summary
An active magnetic bearing (AMB) is one of the several industrial breakthroughs that have changed the traditional perception of rotating machinery. The shaft will fall and might collide with the AMB. To avoid this potential situation, a countermeasure is necessary. Touchdown bearing can be used as such a countermeasure. Touchdown bearings are an important part of any high-speed magnetic bearing system and can prevent direct contact between the rotor and AMB during a rotor drop event by providing a landing pad for the rotor, preventing catastrophic system failure.[2] From an economic viewpoint, an AMB can reduce the operating cost as it has a bearing loss 5 to 20 times less than that of conventional ball or journal bearings at high operating speeds. An AMB has a lower maintenance cost and a longer lifetime than conventional bearings and its reliability under severe conditions has been demonstrated.[3]
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