Malfunction crack failure in hydrodynamically lubricated bearings: A
Case Study Hydraulic Turbine
- Yahya Taşgın,
- Gökhan Kahraman
Abstract
This study investigates the trunnion crack of a 50 MW hydraulic turbine
in the generator guide bearing. The crack area has been examined
metallographically and the fixing method for the the trunnion crack has
been explained. Result of the study shows that the reason for the
formation of the bearing trunnion crack can be the thermal stresses that
occur during the mounting of the bearing trunnion to the turbine shaft
and the material fatigue that occurs during the operation of the
hydraulic turbine.