Which type of bearing is primarily used for turbine rotor shafts?

The use of Kingsbury bearings for turbine rotor shafts is primarily due to their ability to handle the unique operating conditions presented by turbine systems. Kingsbury bearings are a type of hydrodynamic bearing that operates on a film of lubricant, allowing for reduced friction and wear, which is essential in high-speed applications such as turbines.

This design provides superior load-carrying capability and stability under dynamic conditions, making them particularly suited for supporting the rotor shafts of turbines, where axial and radial loads may fluctuate. The hydrodynamic action of the bearing forms a cushion of lubricant that can absorb significant forces without metal-to-metal contact, thus enhancing the longevity and reliability of turbine operations.

Additionally, Kingsbury bearings are often able to accommodate for thermal expansion and can be designed to support the rotor’s weight while reducing vibrations, contributing to efficient turbine performance. This combination of characteristics underscores why they are often preferred in engineering applications involving turbine rotor shafts, making them the correct choice in this context.