Seals are materials or components that prevent fluid or solid particles from leaking between adjacent bonding surfaces and prevent external impurities such as dust and moisture from entering the interior of machinery and equipment(1) Choose appropriate sealing material and hydraulic oil, as well as adaptability to working temperature and compatibility with oil.(2) The geometric position accuracy (concentricity) of the sliding parts relative to the seal is high, and the material is good (such as hard chrome plating) and the surface roughness is fine, which can extend the service life For oil seals used in hydraulic pumps and motor shaft necks, it is not only required that the roughness of the sliding surface be within 0.25m Ra, but also that the surface be plated with hard chromium. In specific use, the radial spring force of the oil seal lip needs to be adjusted appropriately accor...