Key points for use of seals
Date: 2018-7-23 11:59:50 From:SPRSEALS
(1) choose the suitable seal material and hydraulic oil, as well as the adaptability to the working temperature and the compatibility of the oil.
(2) the geometric accuracy (concentricity) of the sliding parts relative to the seals is high (such as hard chromium plating) and the roughness of the surface is fine, which can prolong the service life.
①the oil seal used for the hydraulic pump and the motor axle neck not only requires the roughness of the sliding surface to be within the Ra 0.25m, but also requires hard chromium plating on its surface. In specific use, it also needs to adjust the radial spring force on the lip of the oil seal properly to make it tight and moderate, and also use an installation sleeve or a thin cushion in the installation. The film is used to protect the sealing ring so as not to roll up and twist the lips, causing the spring to slide out.
①the commonly used rolling process on the inner surface of the hydraulic cylinder not only improves the surface roughness, but also makes the surface of the hydraulic cylinder hardened and hardened to prolong the service life of the seal ring. In addition, the pressure used, the length and type of slip surface also have great influence on the service life. Therefore, according to these conditions, the time of "fixed inspection" should be determined.
③The sealing surface is required to be lubricated well and prevent dirt from invading people. It is also a necessary condition to use the oil that meets the prescribed cleanliness level and the correct installation method.