HYBRID SHAFT BEARING WITH A HYDRODYNAMIC BEARING AND A ROLLING BEARING, WIND GENERATOR COMPRISING A HYBRID SHAFT BEARING, USE OF THE HYBRID SHAFT BEARING AND METHOD OF OPERATING THE HYBRID SHAFT BEARING

摘要

Hybrid Shaft Bearing, Wind Generator Comprising a Hybrid Shaft Bearing, Use of the Hybrid Shaft Bearing and Method of Operating the Hybrid Shaft Bearing. A hybrid shaft bearing (20), a wind generator comprising this hybrid bearing (20), use of the hybrid bearing (20) and a method of operating the hybrid bearing (20) is provided. The hybrid shaft bearing (20) comprises a hydrodynamic journal bearing (22) and a rolling bearing (24). Both bearings (22, 24) cooperate with a support structure (26) and rotatably support a shaft (28). To avoid contact between the sliding surfaces (73, 75) of the hydrodynamic bearing (22) the auxiliary rolling bearing (24) carries the load at low speed, e.g. during start-up and shut-down periods, by ensuring a minimum lubricating gap (71). The hydrodynamic bearing (22) takes over the bearing load when a certain speed of rotation is reached. Active supply of lubricant to operate the journal bearing (22) as hydrostatic bearing at low speed is not required. The bearings (22, 24) may be arranged in paralel or in series.