Vertical roller mill working principle and grinding characteristics

1, the vertical roller mill grinding roller body wear
Vertical mill roller body and a wear resistant lining plate is in use process, due to friction between the pressure roller, roller material support force, material and grinding roller lining board; because the material grinding angle caused by mutual comprehensive view the role of pressure stress force of the grinding roller shear force, hydraulic system pressure of roller mill and vertical roller mill table, these forces are acting on the vertical mill roll effective compaction zone. Once the fit clearance between the body and the lining board, will impact the collision occurred, so that between the body and the liner wear intensifies, serious when making lining crack or even break off, causing the lining board, machine damage, particularly damage caused by the reducer, the malignant event. This kind of problem occurred once, general repair methods are difficult to solve, disassembly, repair welding, machining is time-consuming and laborious, caused by the shutdown stop production time is prolonged greatly, enterprise to bring the huge economic losses can be saved without. In view of the above question, Europe and other developed countries use high polymer composite material repair on site, the application of more mature blessed world blue series etc.. Material for its excellent mechanical properties and good plasticity, so that the problem can be solved satisfactorily. Not only can prolong the service life of the equipment, improve productivity, and not occupy additional downtime to suspend production at the same time, simple and effective to avoid the two possibility of the problems, to the enterprise safety and continuous production of escort.
2, vertical grinding roller bearing chamber wear
Vertical mill roller bearing assembly requirements more stringent, firms generally use will be placed in dry ice bearing assembly cooling way. Between the bearing and the bearing chamber once the gap, will affect the normal operation of the bearing, causing heating of the bearing, serious will cause the shaft bearing sintering phenomenon. The traditional welding brush plating method etc. there are some drawbacks: welding will produce thermal stress caused by bearing material damage, serious when can deformation and fracture; brush plating is seriously polluted, and the thickness of the film is limited, the application is restricted. Polymer composite material metal material not only has the required strength and hardness, but also has a concession metal have not (variable relationship), through the "mold repair", "member", vertical roller mill the corresponding relationship between "machining" process, to ensure maximum repair parts and parts with the dimensional coordination; at the same time, the use of composite material itself is compressive, bending, elongation and other comprehensive advantages, can effectively absorb the external shocks, radial greatly resolve and offset of shaft bearing the impact force, and avoid the possibility of gap appears, also to avoid the two wear equipment due to the gap caused by the increment.