The difference between inner skeleton oil seal and outer skeleton oil seal

(TC, TB, TA) The inner Skeleton Oil Seal is exposed, and the skeleton oil seal can be divided into single lip skeleton oil seal (SC, SB, SA) and double lip skeleton oil seal (TC, TB, TA) according to the structure. According to the skeleton type, it can be divided into inner skeleton Oil Seals (TC, SC), exposed skeleton oil Seals (TA, TB, SB, SA), no skeleton oil seals and assembled oil seals. Nitrile rubber NBR skeleton oil seal, PTFE skeleton oil seal, polyurethane PU oil seal, etc.

Skeleton oil seals are used to seal engine crankshafts and camshafts in small cars, and seal forklifts for transmission systems such as motorcycles and commercial vehicles (such as gearboxes, wheel hubs, axle shafts, and differentials). The sealing of the transmission system of agricultural machinery and construction machinery such as excavators, the sealing of industrial gear boxes, the sealing of hydraulic components (pumps, motors), the sealing of daily machinery, and the sealing of washing machines. Skeleton oil seals are widely used in mechanical engineering and equipment processing industries.

The outer part of the oil seal is cylindrical to ensure the static sealing of the cavity - the rubber outer edge with the inner metal frame is used; the outer edge of the exposed metal frame is used, and most of them need to be polished and plated with anti-corrosion coating. The spring-loaded sealing lip guarantees the sealing reliability of the dynamic and static sealing of the shaft. As a result of long-term development and research, the sealing lip structure of the oil seal has been improved to very good performance, thereby improving the sealing reliability in a wider load range. Adding dust lips, or using multiple dust lips in special cases, It can prevent the intrusion of external pollutants and dust.

The sealing state of the oil seal, one is that the outer edge of the oil seal and the cavity are statically sealed, and at the same time, the reliable positioning of the outer edge of the oil seal between the cavities is ensured. The second is the sealing state between the oil seal sealing lip and the shaft. When the shaft rotates, it is a dynamic seal, and when the shaft is stationary, it is a static seal. The comprehensive action and interaction of various influencing factors have a great influence on the sealing performance and service life of the skeleton oil seal.