Brief introduction: the stability of the grease - bearing the function of rolling bearing

The safety of the bearing grease is very important for rolling bearing, select the general recommendations consistency larger 3 grease, rather than smaller grease consistency. On the contrary, in order to reduce the bearing of troubled times, especially start to turn gone with, to average speed is not too high bearing, is can choose low consistency grease is advisable. Fat plastic viscosity results outweigh the viscosity of base oil, and grease film has a clear elastic, so its load resistance ability is greater than the base oil. Just base oil of proper viscosity, the load resistance ability of the grease is no results. Under the condition of boundary lubrication or extreme pressure lubrication, mainly based on additive to improve the anti-wear and extreme pressure function, meet the requirements of lubrication conditions. Correctly use grease, it is necessary to know the fat movement in bearing. Fill in the rolling bearing grease movement, with the rotation of the bearing, generally can be divided into two stages. In normal circumstances, the grease in the bearing filling quantity, demand always exceeds the directly involved in the lubrication theory, in the early stages of the bearing contributed most of the grease quickly ( Less than a minute) Has been rolled out, and piling up on the rack and bearing cover of the cavity, and constitute an outline in the center of the roller. Lu in this process, due to excess grease resistance, bearing temperature rise quickly. Although most redundant grease at the beginning of the operation is being squeezed out, and squeezed in the raceway attachment grease is still can be rotation between the rolling element into the race. The grease in the bearing rotation of systemic circulation at the same time, have a large number of discharge. When bearing (degrees still continue to rise, until all redundant grease were discharge, may be called the grease running-in stage, according to quality, filling grease in the bearing structure elements such as quantity, this paragraph of time can last more than ten minutes, or even a few hours. Grease is completely after discharge, the rest of the rest of the large number of grease in the rolling element and raceway, insist on mutual contact surface, cadastral wedge form a thin film of grease, so as to enter the bearing contributed to stage. The temperature decreasing and reach equilibrium shape. That is to say, for lubrication, mainly relying on the film of grease. In addition, in the process of bearing temporarily running, rolling element and raceway profile near detachments and insist on the shelf to atrophy and grease base oil, flow into the race, between supplement to lubrication also to have certain effect. Different grease in the bearing a contour to traffic is not the same, must constitute the outline is quite is, shorter running-in time, bearing temperature is low in the temporary work, and turbulence, that is a kind of ideal grease, so is especially important for into the canal of grease. Some so-called vortex type grease is not, is not easy to form, even if a profile is easy to collapse, then roll back to the tiny repeatedly redundant grease temporarily by strong mixing, bearing large torque, high temperature, and uneven, can also attack the noise, the grease is also easy to change and loss.