The performance impact of TIMKEN miniature bearing lubrication method analysis - bearing knowledge

by:Waxing     2020-05-27
When testing chrome steel and stainless steel as the TIMKEN bearing material advantages, found that they are not only have antirust function. Chrome steel is the most common type of miniature bearing material. It is more hard than stainless steel, so the service life is longer. At higher temperatures, however, its performance is not good. Under the high temperature of 120 c, it will happen enormous deformation, load decrease. Continues the high temperature of 150 c it also can stand, but the moment 150 c or higher temperature will reduce import bearing's life. Heat treatment can make the bearing instant high temperature of 170 c. TIMKEN bearing lubrication purpose is to reduce the bearing internal friction and the friction losses, prevent burning stick, its lubrication effect is as follows. ⑴。 Reduce friction and friction losses. In constitute a miniature bearing ring, rolling body and touch each other part of the retainer, prevent metal contact, reduce friction and wear. ⑵。 Extend the fatigue life. Fatigue life of rolling bearing, in the rotation, good lubrication performance of the rolling contact surface, are extended. On the contrary, the oil viscosity is low, the thickness of lube film is not good, is shortened. ⑶。 Discharge frictional heat and cooling cycle to oil can discharge by friction heat, oil, or from external heat from the cooling. To prevent hotbox, prevent aging oil itself. ⑷。 Other also has to prevent foreign matter into the bearing internal, or to prevent rust and corrosion effect. Lubrication methods: TIMKEN bearing lubrication method, divided into grease lubrication and oil lubrication. In order to make the miniature bearing function well, first of all, to choose suitable for conditions of use, the purpose of lubrication method. If only consider lubrication and oil lubrication. However, grease lubrication can simplify the structure of bearing the surrounding of the special features, compare the pros and cons of grease lubrication and oil lubrication. The most common used in miniature bearing stainless steel, 440, it's hard and strong enough to load, Less than 20%) brass steel , but it can rust, can endure instant high temperature of 250 c and 300 c of the continuous high temperature. We often mistake as all of the stainless steel are no magnetic, 440 stainless steel is a magnetic, it is not completely rust, but under the influence of salt, acid, alkali. 316 grades of antirust performance is very good, no magnetic, but softer so load less, because it is not strong, so 316 bearing accuracy is not high, feel is rough.
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