Flange Bushing Factory to introduce the structure of the skeleton oil seal is simpler, usually composed of three some: oil seal body, strengthen the skeleton and the spiral spring.At the bottom of the seal according to the different parts of the body is divided into, waist, blade and sealing lip, etc.Usually, in the free state of skeleton oil seal, the inner diameter smaller than the diameter of axle, namely has surely "interference".Thus, when oil seal in oil seal and the shaft seal edge pressure and self-tightening spiral spring shorten the force on the shaft of the radial force of will, through a period of time after operation, the pressure will be agile diminish or even disappear, as a result, combined with spring can compensate the oil seal since the force.
