固体潤滑剤による高温度玉軸受の混合気潤滑

Abstract

The need is beboming more and more urgent for bearings operating at very high temperatures. But present-day liquid lubricants are temperature-limited owing to their characteristics，but solid lubricants are chemically more stable. So in pursuit of information concerning the performances of the angular contact type ball bearing operating in an electric furnace under the solid lubricant mist lubrication at high temperature，the frictional moment and temperature of bearing have been measured. The conclusion reached on the experimental results is as follows. The bearing can be run at surrounding temperatures up to 800℃ without appreciable damage. The smaller the particles of solid lubricants， the less frictional moments are obtained， but at very high temperatures the grading and consumption of solid lubricants have little influence on the frictional moment. Small change in frictional moment occurs in accordance with variation of surrounding temperature， but at high surrounding temperatures frictional moment is largely affected from bearing load. The moisture content of solid lubricants have little influence on the frictional moment. The cooling effect of air is somewhat remarkable