1.Lubricating effect

For pot - type rubber bearings, good lubrication is required between the stainless - steel sliding plate and the polytetrafluoroethylene (PTFE) plate. The presence of silicone grease makes the relative sliding of these two components smoother, just like the lubrication between ice skates and the ice surface during skating. It reduces the resistance caused by friction, thus reducing the energy loss of the bridge bearings during the deformation process.

Taking spherical bearings as an example, the relative rotation between the spherical crown lining plate and the upper seat plate requires silicone grease to reduce wear. Without silicone grease, under the influence of factors such as vehicles repeatedly passing through the bridge and periodic temperature changes, the surface materials of these components will be gradually worn away, affecting the service life and performance of the bearings. Silicone grease acts like a protective film and prolongs the service life of the bearing components.

2.Sealing performance

Bridge bearings are exposed to the natural environment and will be affected by rain, dust, etc. Silicone grease can fill the tiny gaps in the sealing parts of the bearings to prevent water and dust from entering the interior of the bearings.

The sealing effect of silicone grease helps to maintain the stability of the performance of the lubricating medium (if any) and other materials inside the bridge bearings. It can prevent the loss of internal grease and ensure the long - term effectiveness of the lubrication effect of the bearings.

3.Adapting to environmental changes

Bridge bearings need to work under different climatic conditions and will experience large temperature changes. Silicone grease can maintain its performance within a wide temperature range. It will not flow due to high temperature, nor will it solidify due to low temperature, so it can always provide good lubrication and sealing for the bearings.

Bridge bearings usually have a long service life. Silicone grease has good anti - aging performance and can maintain the stability of its chemical and physical properties in the long - term outdoor environment.