Repair method for deformation of friction pair in rotary joint

The lifespan of a rotary joint is generally one or two years, and it is inevitable to have problems. Timely maintenance or correction can continue to be used without replacing the joint, which not only wastes money but also time. The longest encountered deformation is the sealing pair, which needs to be corrected to ensure the flatness of the conflicting pair.

Correction method for deformation of conflicting pairs in rotary joints
The main methods for correcting the deformation of the rotating joint conflict pair are grinding and polishing. Abrasives, grinding fluids, and tools are used to correct the surface of the seal and static ring to obtain the required shape and surface roughness. The flatness of the mechanical seal conflict pair surface requires high flatness and low roughness, so it is necessary to remove the extremely thin surface layer from the working surface to obtain a high-precision surface.
The abrasive has a higher hardness than the conflict pair, and under a certain force effect, it slides relative to each other for cutting, making the surface of the rotating joint conflict pair flat and bright. The workpiece surface forms a very thin oxide film under the effect of chemical active substances. Grinding the conflict pair will continuously damage the protective film, and the exposed area will also continuously produce new oxide films, removing the protruding parts of the conflict pair surface to achieve flatness; The correction process of the rotating joint conflict pair is also the process of plastic deformation. Grinding and polishing conflict with each other, generating heat, and some surfaces may experience instantaneous melting, causing the surface to gradually flatten due to the conflict; When a certain number of electrons are left on the surface of the rotating joint collision pair, and the electrons and metal ions undergo electrolytic attraction, the metal ions on the surface of the collision pair are adsorbed to form a double layer, and there is also a potential difference between the two, thus achieving the intention of correction.