Basic knowledge of rotating oil seal

The concept of oil seal

DSH oil seal is the customary name for general seals, and it is also a rotary seal that serves as a seal for lubricating oil. Rotary oil seals are generally divided into single type and assembly type. Assembled type is that the frame and lip material can be freely combined, and are generally used for special oil seals.

Rotary oil seal is a mechanical element used to seal oil (oil is the most common liquid substance in the transmission system, and also refers to the general liquid substance). It combines the parts that need to be lubricated and output in the transmission parts. The components are isolated to prevent the lubricant from leaking. Oil seals can be divided into various forms and different names from the sealing function, characteristics, structure type, working state and sealing mechanism of oil seals (seals), but it is customary to call rotating lip seals oil seals. The representative form of oil seal is Dongsheng TC oil seal, which is a double-lip oil seal (rotating seal) with self-tightening spring covered with rubber.

The material of the oil seal

The commonly used materials for rotating oil seals are: nitrile rubber, fluorine rubber, silicone rubber, acrylic rubber, polyurethane, polytetrafluoroethylene, etc. When selecting the material of the oil seal, the compatibility of the material to the working medium, the adaptability to the working temperature range, and the ability of the lip to follow the rotating shaft during high-speed rotation must be considered.

The working mode of the oil seal

Engine: Crankshaft--Crankshaft front and rear oil seal valves--valve oil seals (engine repair kits); distributor oil seals, water pump oil seals, balance shaft oil seals, oil pump oil seals; camshafts—camshaft oil seals; transmission repair kit o-rings Transfer case-front and rear oil seals of transfer case; oil seal repair kit, O-ring seal, direction booster oil seal.