How to correctly understand the limit speed of bearing

　　The limit speed of the bearing is bearing during operation can achieve the highest speed, the relationship between mainly depends on the bearing operation due to friction heat and the heat emitted from, and bearing materials, structure size, clearance, load, keep frame materials and structures and to guide the way, lubrication, the amount of lubricant, the bearing cooling condition factors are closely related.

　　 Under normal circumstances, bearing samples are given a single set of bearing grease lubrication and oil lubrication conditions limit speed, its applicable conditions: standard structure, ordinary level accuracy, basic group clearance of bearing type; well lubricated; equivalent dynamic load of the bearing rated dynamic load bearing 10% less than the; the environment temperature of 20 DEG C, the bearing temperature rise is 50 DEG C; radial bearings only bear radial load, thrust bearing bear only axial load. If the actual operating conditions are different from those of the above conditions, the actual maximum working speed will be lower than the reference limit values given in the sample. Double or triple bearing limit speed can reach a single set of bearings 60%-80%.

　　 Improve the precision of bearing and appropriate to increase the bearing clearance can improve the bearing limit speed in a certain extent, but difficult to quantify the specific improved numerical; use of lightweight materials manufacturing keep frame or the special structural design of the holder, the more effective lubrication method can greatly increase the bearing high speed limit, the maximum up to 3 to 4 times the limit speed of the sample are given.