Key Features and Functions:
Prevent Leakage: Ensures lubrication stays within bearing housings, preventing premature fluid loss.
Contamination Exclusion: Keeps dust and contaminants out of the generator’s internal mechanisms.
Material Composition: Often constructed from materials designed to withstand heat, oil, and chemicals, such as NBR (for standard, -40 to +120°C) or FKM (for high-temp, -20 to +230°C).
Design Components: Contains a rubber-covered or metal outer diameter, a spring-loaded sealing lip for consistent radial tension on the shaft.
Hydrogen Sealing: In large power generators, specialized seals maintain a thin, high-pressure oil film to prevent hydrogen from escaping and atmospheric air from entering the generator housing.