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1 Transactions of the Institute of Fluid-Flow Machinery

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Hybrid bearing development for high-speed turbomachinery in distributed energy systems

Tkacz E., Kozanecki Z., Łagodziński J.

Transactions of the Institute of Fluid-Flow Machinery

2016

nr 131

161--172

In the paper authors undertake the design of hydrostatic bearings and hybrid bearings for a speciﬁc application – hermetic high–speed turbogenerators for the electric power generation. The most common hydrostatic bearings are usually oil lubricated. On the contrary, the considered here machines are dedicated for the combined heat and power (CHP) production in organic Rankine cycle (ORC) systems and so the hydrostatic bearings use an organic, oil-free working ﬂuid as the lubricant. The reader will acquire an insight into the special characteristics of hydrostatic bearings. Moreover, a new type of bearings, a hybrid bearing, is introduced, which combine both, hydrostatic and hydrodynamic eﬀects. The designed bearings have been manufactured and their good performance conﬁrmed during tests on a real machine.