What type of bearing oiling method is commonly used for small auxiliary turbines?

The commonly used oiling method for small auxiliary turbines is oil-impregnated bushings, which represents a practical solution for lubrication in compact machinery designs. These bushings are typically made from materials that have been saturated with oil, allowing them to provide a regular supply of lubrication to the bearing surfaces during operation.

This method is particularly advantageous because it minimizes the need for external lubrication systems and reduces maintenance efforts. Oil-impregnated bushings can release oil gradually over time, ensuring that the bearings remain lubricated without requiring constant attention or the complexity of external pumps.

Other methods, such as using grease nipples, may not be suitable for the continuous operation and size constraints associated with small auxiliary turbines. Similarly, self-lubricated bearings can be useful, but they do not provide the consistent oil flow that oil-impregnated bushings offer. Ring-oiled bearings, while effective for certain applications, tend to be more complex and usually found in larger machinery where a dedicated lubrication system can be implemented. This practicality makes oil-impregnated bushings the preferred choice for small auxiliary turbines.