The skeleton oil seal structure consists of three parts: oil seal body, reinforced skeleton, and self tightening spiral spring. The sealing body is divided into bottom, waist, blade, and sealing lip according to different parts. Usually, in a free state, the inner diameter of a skeleton oil seal is smaller than the outer diameter, which means it has a certain amount of "interference". When the oil is encapsulated into the oil seal seat and shaft, the pressure of the oil seal blade and the contraction force of the self tightening spiral spring generate a certain radial tension on the shaft. After a period of operation, this pressure will quickly decrease or even disappear. With the addition of the spring, the self tightening force of the oil seal can be reduced at any time. The function of a skeleton oil seal is generally to isolate the lubricated components in the transmission components from the output components, so as not to let the lubricating oil leak. It is commonly used for rotating shafts as a type of rotating shaft seal., Manufacturer: QAXRZCUCD