The difference between rolling bearings and plain bearings in ball mill
You should ask, why does the mill's bearings change from sliding to rolling?. The moment of technological upgrading in industry is the birth of new products. As you ask, when the ball mill starts to use the bearings is like asking when the bike starts to use chain drive. The design, I have not been able to know the mill but the historical setting, must have tried many times of failure, material, loading, production process, and ultimately determine the early embryonic development since the various types of mill.
As for the advantages and disadvantages of these two kinds of bearings, I only point to the key, because it involves two kinds of friction in physics, that is, sliding friction and rolling friction, you can find relevant information. From the viewpoint of technology of sliding bearing has a long history, the technology is mature, with a hemispherical bearing as an example, through the serpentine cooling pipe, mill shaft and tile surface by oil film forming lubricating grease lubrication, but relative to the rolling bearing, friction force is still large, directly affect the power consumption is large. On the contrary, one of the most interesting concerns about rolling friction is the heat dissipation of the hollow shaft. Of course, there is a great deal of inconvenience in the processing of rolling bearings as well as the maintenance of the bearings. All right, the bricks are going so far. Jade is waiting for you to come out. (inadequacies, please advise)
But according to my personal inference, establishes first should be the production process - rotary grinding method, then in order to solve the problem of rotary bearing will lead to bearing hollow ball mill, but at the time of the machining level and the production process of hollow bearing cooling considerations, and ultimately selected the sliding bearing. This inference is based on technological transformation and upgrading as a clue. So it's for reference only. Secondly, compare the advantages and disadvantages of bearing and bearing the problem itself is wrong, bearing and bearing you concept is not clear, take the two kinds of commonly used ball mill bearing is divided into sliding bearing and rolling bearing, what you said is referred to as sliding bearing bush (or known).
