On the wear of plastic plain bearings
Plastic bearings plastic bearings wear resistance depends on the wear resistance of the material itself, but the plastic bearing wear is closely related to the following factors: the shaft material, hardness, roughness, bearing running speed, load and ambient temperature , humidity, etc.; as plastic sliding bearings manufacturers, is constantly optimize the wear resistance of plastic bearing materials and provide users with the MR16correct selection guidance; and as a user to follow the manufacture of plastic bearings Product manual on the selection of plastic sliding bearings and assembly instructions.
Any bearing the most critical moment is start-up phase. At this point, the formation of lubricant film has not yet bearing to work, this is the most common situation. As long as the work of bearing a load in the bearing will produce minor wear. In the startup phase, minor wear more fully, they will wear with these small particles fill the outer surface of the shaft, so when working with low wear and tear can generate optimal lubricating film. Starts, minor wear down quickly, these changes had little impact on the size. After the start-up phase of continuous work, the wear rate is small and stable.
Any type of plastic plain bearings is matched with Led lightingthe best working conditions are, for example, with the axis of the best material, roughness; best work pressure, speed, temperature, etc.; for CSB-EP series best plastic plain bearings with chrome-plated shaft material surface; roughness on the CSB for each type of plastic plain bearings on the shaft surface roughness requirements are not the same, we can see from Figure 3 CSB plastic plain bearings on the shaft of the roughness from Ra0. 1 to Ra1.6; while CSB-EP5 plastic plain bearings for the best temperature is not at room temperature, EP5 160 ℃ in temperature friction and wear when shown the best performance.
CSB laboratory in constant imitation of various operating conditions of the test study found that plastic bearing wear occurs in the form of the work are the following:
Normal wear and tear - bearing in the correct place under the conditions used in conjunction with the wear and tear; this time bearing wear mainly work in the initial stages of bearing lubrication of the shaft to the surface of the material result of the transfer, when the deputy after the establishment of the ideal bearing lubrication The wear rate slowly decreased.
Crawl wear - As the shaft surface roughness caused by tslide bearinghe friction surface is too smooth crawling; shaft surface is too smooth, lubricating plastic plain bearing material can not be transferred in to fill the pits in the shaft surface to form lubricating film, making the ideal friction can not be established; this bearing friction coefficient increased when the required driving force is increased;
Furrow wear - As the shaft is too rough cause friction surface scratching furrows phenomenon; shaft surface height difference is too large, the transfer from the bearing surface to the formation of a solid lubricating material can not be the ideal smooth surface friction; substance of wear occurs at this time is the scratch of wear and tear;
Glue wear - because beyond the safe operating temperature or the optical axis of the bearing caused by glue; optical axis in the bearing operating temperature exceeds the temperature to allow the safe operation of the adsorption has taken place in the local softening of the friction bearing surface formed by wear and tear.
Burns wear - due to run too fast burns caused by the friction surface wear; shaft bearings run faster than the speed allowed by the friction surface will cause friction because the friction heat from a sharp rise in raw, dramatic increase in the frictional heat of friction surface resulted in a quick burn.
Of course, the occurrence of plastic bearing wear is unavoidable phenomenon in the plastic bearing performance have been identified, we can only follow as far as possible the use of each of the different models bearing rule, the plastic sliding bearings to minimize wear and tear, which the performance of the plastic bearing to play the best.
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