Floating oil seal is a common name for floating seal, which is a kind of mechanical seal in dynamic seal. It has super sealing performance in harsh working environment such as coal powder, silt, moisture, etc. It is a compact mechanical Sealed, mainly used for low speed and heavy load occasions. It has the advantages of wear resistance, automatic compensation after end face wear, reliable work, simple structure, etc., and is widely used in coal mine machinery. Such as the head (tail) sprocket assembly of the scraper conveyor, the loading mechanism and the cantilever section of the roadheader, the left and right cutting drums and the reducer of the continuous shearer.