Bearings and bearing pedestals
Bearing pedestals are standardized in four scaled sizes. The front pedestal is designed as a so called standing pedestal. With back-pressure turbines the rear pedestal will also have the same design, but for condensing turbines the rear pedestal will be fixed to the exhaust casing. The bearings are designed as long-lasting components with simple maintenance and are equipped – as a standard – with bearing metal temperature sensors.
Shaft sealing is done by noncontact metallic sealings, the so called labyrinth or brush sealings. The working principle is based on a serie of annular gaps and chambers, where the steam pressure is transformed into velocity energy.