Bearing lubrication is undoubtedly very important to the role of the sand making machine. The lubricating oil is wrapped in the bearing, forming a protective film, after the sand making machine rotates, the lubricating oil is gradually squeezed out, and the friction between the metal and the metal becomes a long time, so the damage to the bearing is very great.
The two ends of the bearing bushing of the sand making machine are made of table chips to prevent the bushing from axial movement between the bearing seats; The middle of one side of the bushing is provided with a raised part, which is inserted into the corresponding groove of the bearing seat during assembly to prevent the bushing from rotating with the journal.
The bushings of this kind of bearing are made of bronze or bakelite. In the case of heavy load or high speed, a layer of babbitt alloy can also be cast on the bronze bushing to reduce friction and improve transmission efficiency. Plain bearings are now used a lot, especially in the case of heavy loads are more widely used. The bearing is characterized by simple structure and easy to replace; Strong carrying capacity. However, the friction loss is serious and the transmission efficiency is low. The oil consumption is large, and the axial size is large, which makes the size of the entire mechanism increase.
