What is the function of carbon seals?

The function of carbon seals in gas turbine systems is primarily to prevent oil from leaking past the drive shafts in the gearbox. These seals are specifically designed to handle the high rotational speeds and pressures found in gas turbine applications, providing a barrier that ensures the lubricant remains contained within the gearbox. This is crucial for maintaining the proper lubrication of gears and bearings, which reduces wear and promotes long-term operational reliability.

By effectively sealing the gearbox, carbon seals also help maintain the efficiency of the lubrication system, reducing the likelihood of oil loss that could lead to overheating and potential mechanical failure. This is particularly important in the demanding environment of gas turbines, where maintaining optimal operating conditions is essential for system performance and longevity.

The other options, while related to lubrication and performance, do not capture the primary role of carbon seals. They serve specific purposes such as facilitating oil flow or enhancing cooling but do not address the critical sealing function that prevents oil leakage.