For a low-speed, heavy-duty Φ3200×4500 ball mill, due to the large diameter of the cylinder, the supporting distance between the two bearings is also large. The bending and deformation of the mill cylinder will produce greater deflection. It is required that the selected bearing can be aligned, otherwise the cylinder is Different shafts are produced during operation, which makes the working condition of the bearing deteriorate and even damage the bearing. Therefore, we choose double-row self-aligning spherical roller bearings. On this ball mill, the bearing model selected is 30531/1000K. Dynamic bearing load rating: Cr=11400kN, static bearing load rating: Co=35500kN, limit speed: n=100r/m.
There are two main types of rolling bearings for ball mills: one type of bearing outer ring is integral; the other type of bearing outer ring is split. The outer ring is a split rolling bearing, which requires higher manufacturing precision and has the advantage of convenient ball replacement. The outer ring is an integral rolling bearing inner hole has two structures: one kind of inner hole is cylindrical, the other is conical. The inner hole is a conical rolling bearing, which is easy to replace. In actual work, as long as the bearing is well maintained, the seal is reliable, and the bearing life is more than 10 years, it is possible to choose an integral bearing with a cylindrical inner hole and an outer ring.
