Grease lubrication and oil lubrication effect contrast in FAG rolling bearings, bearing knowledge

FAG rolling bearings used lubricating oil has the advantages of: 1) Under certain operating norms, use of lubricating oil is larger than that of grease lubrication starting torque and low friction losses significantly. 2) Heat can be taken away because of lubricating oil in a loop cooling effect, therefore, can make the FAG bearings to achieve relatively high rotational speed. 3) To ensure the use of higher temperature. 4) In fat, must remove the connecting parts, oil lubrication, no such trouble. 5) FAG bearings with lubricating oil in the gearbox is very appropriate, because the oil at the same time, in the form of splash at the same time and FAG bearing lubrication gear. 6) In FAG bearing grease gradually be wear and tear of the product, abrasive products, from the outside after sealing device penetration and aging product contamination by itself, if not timely replacement, then lead to accelerate FAG bearing wear, and the application of liquid lubricant, can be filtered and ensure its normal operation. FAG rolling bearings with grease lubrication advantages: 1) Individual FAG bearing point, must often go with the hand, such as switch to fat is both convenient and can avoid the accident caused by short of oil. 2) The fat itself has sealing function, which can allow the sealing degree is not high simplifies the design of institutions. 3) Experience has shown (to a certain speed range n< 20000 r/min or dn< 20000mm. r / min) With lithium base grease lubrication than using drip method has lower temperature and longer FAG bearing life. 2, FAG rolling bearings lubrication theory basis: the lubricating mechanism of FAG rolling bearings is belong to the theory of elastic liquid dynamic pressure lubrication. 3, FAG rolling bearings and lubrication failure type relationship: most of the failure reason is because there is something wrong with assembly, the damage is sealed. A handful of the cause of the failure is due to the lack of or excess lubricant or substandard etc caused by the wear, agglutination, corrosion and overheating, etc. 4, the basic characteristics of the grease and to choose the standard of the grease: choosing grease, must choose and use conditions, Temperature, velocity, load and environment, etc. ) Adapt to grease, these are related to the basic characteristics of the grease, but the basic characteristics of the grease depends on the thickener and the type of base oil. FAG rolling bearings has both rolling friction and sliding friction. Sliding friction is due to FAG rolling bearings in the deviation of the surface curve and FAG bearing deformation under load. Between roller and ring, for example, because of the ball and ring is not absolutely rigid, they always produce elastic deformation of contact area, theory of point contact and line contact, but in fact the load working conditions always into surface contact, so contact with different diameter has different linear velocity produced by sliding friction. Also because of various reasons can make the roller and retainer and retainer and produce sliding friction between inner and outer ring. And sliding friction increases with the increase of speed and load, in order to reduce the friction and wear, reduce the temperature, noise, prevent rust FAG bearing parts, correctly selecting lubricant and adopt reasonable lubrication method, appropriate control of lubricant quantity is a important subject to improve FAG bearing life. This is grease lubrication and oil lubrication in FAG rolling bearings used in the comparison of effect, hope everyone looks after.