What is the function of the staff packing on a SSTG?

The function of the staff packing on a Steam Support Turbine Generator (SSTG) is to prevent leakage of steam and ingress of air into the turbines. This is critical in maintaining the efficiency and performance of the turbine system. By sealing off the areas where the turbine shaft passes through the casing, staff packing effectively keeps the high-pressure steam contained within the system, minimizing losses and ensuring that the generator operates at optimal efficiency.

Preventing air from entering the system is equally important, as the presence of air can lead to corrosion, decreased efficiency, and potential operational issues. The design of the packing material allows for a tight seal that can accommodate the high temperatures and pressures typically found in steam systems, thus enhancing the overall reliability of the SSTG.

In contrast, while supporting the turbine rotor, lubricating components, and enhancing thermal efficiency are essential aspects of turbine operation, they are not the primary function of the staff packing.