What Are The Factors That Affect The Wear Of CSB-EPB® Plastic Plain Bearings?
What are the factors that affect the wear of CSB-EPB® plastic plain bearings?
The wear resistance of plastic sliding bearings mainly depends on the wear resistance of the bearing material itself. However, the following factors also affect the wear resistance of the bearing: the material, the hardness and roughness of the grinding shaft, the speed and load of the bearing, the ambient temperature and humidity of the working environment, etc. For plastic sliding bearings, CSB continuously optimizes the wear resistance of plastic bearing materials and provides users with the correct selection guide. Be sure to follow the plastic sliding bearing selection and assembly instructions shown in the product manual provided by the plastic sliding bearing manufacturer to the user.
CSB laboratory has carried out continuous testing and research under various working conditions, and found that the main forms of wear that occur during the operation of plastic sliding bearings are as follows:
Normal wear-the wear of the bearing under correct working conditions. At this time, the wear of the bearing is mainly manifested as the result of the transfer of the lubricating substance in the bearing to the shaft surface in the early stage of operation. After the ideal lubrication pair is established, the wear rate of the bearing will slowly decrease.
Stick-slip wear-two friction surfaces crawling on each other because the surface roughness of the shaft is too smooth. This results in that the lubricating material in the plastic sliding bearing cannot be transferred to fill the cavity on the shaft surface to form a lubricating film. That is, the ideal friction pair cannot be established. As the coefficient of friction increases, the required driving force also increases.
Groove wear-a groove phenomenon in which the friction surface is scratched because the shaft is too rough. The flatness of the shaft surface is too low, causing the lubricating substance transferred from the bearing surface to not firmly form an ideal smooth friction surface. The wear that occurs at this time is essentially scratch wear.
Adhesive wear-adhesion caused by exceeding the maximum operating temperature of the bearing or the shaft is too smooth (such shafts are called ordinary shafts. When the operating temperature of the bearing exceeds the maximum allowable operating temperature, it is attached to the partially softened bearing friction The surface will cause this adhesion wear.
Wear and tear-Shaft running too fast will scratch the friction surface. When the operating speed of the shaft exceeds the allowable operating speed of the bearing, the temperature on the friction surface will rise rapidly due to the heat generated by the friction. And the increased heat quickly burns the friction surface.
Of course, the wear of plastic sliding bearings is inevitable. After determining the performance of the plastic sliding bearing, we can only follow the service regulations of each different type of bearing as much as possible to minimize the wear of the plastic sliding bearing and maximize its performance. Plastic bearings.