Which type of bearing is primarily used on compressor and turbine shafts?

• A. Ball Bearings
• B. Roller Bearings
• C. Fluid Bearings
• D. Magnetic Bearings

Answer: (A)

The correct choice regarding the type of bearing primarily used on compressor and turbine shafts is fluid bearings. Fluid bearings are designed to support the load of shafts while minimizing friction, making them ideal for high-speed applications like compressors and turbines where precision and reliability are critical. They typically use a lubricating fluid, often oil, to create a thin film that separates the moving parts, which helps to reduce wear and heat generation.

In contrast, ball bearings and roller bearings are more common in various machinery applications due to their simplicity and ability to handle radial loads, but they might not withstand the same high-speed conditions or load demands seen in turbines and compressors as effectively as fluid bearings. Magnetic bearings use magnetic fields to levitate the shaft without contact, which is also beneficial in high-speed machinery, but their complexity and cost often make them less common in conventional applications compared to fluid bearings.