Steam Turbomachinery Bearings
are bearings used in steam turbines to support the rotors and shafts. They play a crucial role in the operation of steam turbines, as they must withstand the high radial and axial loads, as well as the thermal and dynamic stresses generated by the steam flow.
There are two main types of steam turbomachinery bearings: journal bearings and thrust bearings. Journal bearings support the rotating shaft and provide radial support, while thrust bearings support the axial loads generated by the steam flow.
Journal bearings can be either fluid film bearings or plain bearings. Fluid film bearings use a lubricating fluid to support the shaft, while plain bearings are designed to support the shaft through direct contact with the bearing surface.
Thrust bearings can be either tilting pad or fixed geometry thrust bearings. Tilting pad thrust bearings use a series of pivoting pads to support the axial loads, while fixed geometry thrust bearings use a series of fixed pads.
Steam turbomachinery bearings must be designed to operate in harsh conditions, including high temperatures, high speeds, and exposure to corrosive fluids. They are typically made from materials such as high-temperature alloys, ceramics, or polymer composites, which have high resistance to thermal and dynamic stresses.
In conclusion, steam turbomachinery bearings are critical components in steam turbines. They play a crucial role in supporting the rotating shaft and providing radial and axial support, while withstanding the high thermal and dynamic stresses generated by the steam flow. The right choice of material and design is important to ensure reliable and efficient operation of steam turbines.