Because there are many brands and models of cars, there are different oil seal models and many classifications. It is mainly classified by the medium of the oil seal, the shape of the oil seal, the spring of the oil seal, the lip type of the oil seal, the speed of the oil seal (high and low speed), the pressure of the oil seal (high and low pressure), the fluid power of the oil seal.
1.can be classified according to the sealing medium: gas seal with oil seal, fluid seal with oil seal, grease seal with oil seal;
2.can be classified according to the seal shape: rotary shaft with oil seal (inner seal), rotary shell with oil seal (outer seal);
3. It can be classified according to its own structure: skeleton oil seal (mainly divided into outer skeleton oil seal and inner skeleton oil seal), skeletonless oil seal, composite oil seal; Can be classified according to the spring or no spring oil seal: spring type oil seal (ribbon spring or finger spring oil seal), no spring oil seal;
4.Can be classified according to the number of lips of the oil seal: single lip oil seal, double lip oil seal (there are anti-dust lip oil seals or two kinds of separated lips oil seals, etc.);
5.can be classified according to the rotating linear speed: low speed oil seal (standard low linear speed < 8m/s), medium speed oil seal (standard line speed 8-17m/s), high speed oil seal (standard line speed > 17m/s);
6.It can be classified according to whether there is fluid power oil return effect: ordinary smooth oil seal, oil seal with oil return line at the lip;
7.can be classified according to the oil seal medium pressure: low pressure oil seal, high pressure oil seal;
According to the standards given by the state, the structure of the oil seal can be generally divided into three sealing surface structures and six basic oil seal forms (internal skeleton oil seal structure diagram, exposed skeleton oil seal structure diagram, assembled oil seal structure diagram).
