What type of lubrication system is used for line shaft bearings?

The correct choice, splashed lubrication system, is appropriate for line shaft bearings due to the way it effectively delivers lubricant within machinery that operates at varying speeds and conditions. In a splashed lubrication system, the rotating parts of the machinery dip into a reservoir of oil, which creates a splash that coats the bearings and other components. This method ensures that the lubricant reaches all necessary surfaces without requiring complex pumps or mechanisms to distribute it, making it particularly suitable for line shaft bearings found in gas turbine systems.

Line shaft bearings experience significant operational demands and can generate heat, making the maintenance of adequate lubrication essential for reducing friction and wear. The splashed lubrication method facilitates an even distribution of oil, helping to cool the bearings and ensure consistent performance across the operational range.

In contrast, other lubrication systems, such as gravity or forced, may not provide the same level of effective lubrication under varying operational circumstances present in line shaft applications. Manual lubrication systems are also less practical for continuous applications where constant operation is required. Hence, the splashed lubrication system's efficiency and simplicity make it the ideal choice for line shaft bearings in gas turbine operations.