Rolling contact whirling motion of a rotating shaft supported by a repulsive magnetic bearing and a rotatable backup bearing (Influences of friction coefficient and damping) (original) (raw)
2014, Transactions of the JSME (in Japanese)
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The Proceedings of the Fluids engineering conference, 2012
The rotordynamic fiuid forces on a closed Wpe ce ロ tri 魚 ga 且impeller in whirli 皿 g motion were measured and simulated for tWo types of seal ， a face seal and a weat ring seal ． The rotordynarnic fluid forees are destabilizing in the ranges of Oく aw く 0． 5 fbr the face sea1 and O くato for the wear ring seal ， where ∫ n and ω are a whirling speed and a rotational speed of 血e sha 丘， respeCtively ． The characteristics ofthe rotordynamic fluid丘)rces could be u咀derstood in consideration of a squeeze effeCt and the change of resistance of seal due to the eccentricity of the impeUer fbr a swirling fiow in the clearance between the front shroud of the impeller and the casing ． In a low 且ow rate ， a rotating sta 耻 occurred and changed the rotordynamic fiuid fbrce drastically around 9 ω ＝ 0． 7 最) r the face seal ， 0． 6＜ρ ω く0 ． 9 fbr 重 he wear ring seal ． Key Mfoκds：Pump ， Rotordynamic Fluid Force ， Seal ， Unsteady Flow
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