When the turbidity of Bearing C35 is higher than 80°C, the high temperature is usually considered in the sealing field, and corresponding cooling measures must be taken at this time. 2 According to the characteristics of the medium, select the weakly corrosive medium. Usually, the built-in mechanical seal is selected, and its end face stress state and medium leakage direction are more reasonable than the external type. For strong corrosive media,

because the selection of spring materials is difficult, external or PTFE bellows mechanical seals can be selected, but generally only suitable for the range of p≤0.2～0.3MPa. The medium that is easy to crystallize, solidify and high viscosity should adopt a large spring rotating structure. Because the small spring is easily blocked by solids, high-viscosity media will block the axial compensation movement of the small spring. For flammable, explosive, and toxic media, in order to ensure that the media does not leak, a double-end structure with sealing liquid (isolating liquid) should be adopted.

The structure selected according to the above working parameters and medium characteristics is often only a preliminary plan, and the characteristics of the host and some special requirements for sealing must be considered in the final determination. For example, the seal life of a rocket engine only takes a few minutes, but it is required to never leak in a short time. In order to obtain more effective space, the main engine on the ship often puts forward very strict requirements on the size and installation position of the seal. Another example is the drainage pump on the submarine.

During the ups and downs of the submarine, the pressure changes greatly. In these cases, the standard structure cannot be selected according to the routine, but a special design must be made for the specific working conditions, and the necessary auxiliary measures must be taken at the same time.

https://www.cnzxzc.com/product/non-standard-series/mechanical-bearing-c35.html