油封具有如下的作用和特点:1.防止润滑油从轴承一侧漏掉,也防止水,灰尘或其它有害物质侵入机体内;2.要有小的摩擦损失和好的密封性能;3.结构小,容易装卸;4.相配的轴有一定的偏心误差,仍可高速运转;5.相配的轴表面应光滑,但轴面太光滑也不一定好;6.正常工作时要不漏油且油封刃口耐磨; Oil seal has the following functions and features: 1. To prevent the leakage of oil from the bearing side, but also to prevent water, dust or other harmful substances invade the body; 2. To have a small friction loss and good sealing performance; 3. Structure Small, easy to load and unload; 4 matching shaft has a certain eccentric error, can still be high-speed operation; 5 matching shaft surface should be smooth, but the axis is too smooth and not necessarily good; 6 normal operation, Oil seal edge wear;