And a half since the mill main shaft sealing surface wear the blue field repair technology

And a half since the mill main shaft sealing surface wear f 2020 - the blue field repair technology 12 - 08, equipment introduction since the mill is a use of grinding media in a grinding machine grinding grinding equipment. Since the mill is in the mill on the basis of the cylinder body to join a small amount of steel ball grinding machine as the grinding medium is used to make up for the inadequacy of ore as the grinding media. And a half since the grinding machine has: process is simple, easy to operate; To improve the characteristics of the electrochemical properties of pulp. Its structure is mainly composed of main bearing, cylinder, transmission parts, cylinder sieve composition ( See figure 1) 。 Some companies, equipment status quo two 4 million t mill & phi; 8. 53 * 4. 27 m semi autogenous grinding machine spindle bearing adopts three tongue rubber seal, in order to prevent the oil leakage in bearing and impurity invasion. In the running for a period of time after abrasion of rubber sealing surface appear on both ends of the spindle, wear is about 3 - Wear 5 mm, width is about 80 mm. Three and a half, equipment problems caused by understanding analysis since the mill main shaft seal wear reason is due to the material into sealing surface, cause the shaft end sealing surface wear condition, the other companies in the wake of a wear by means of sealing parts in a gasket to alleviate the spill once the gasket and shaft relative friction will exacerbate shaft sealing surface wear. Four, repair process analysis of the traditional craft repair methods for such problem is machining processing after repair welding, due to the down time is limited, on site repair welding machining process is difficult to achieve in the short term. Paper discusses enterprise will plan in order to solve this problem as a polymer composite repair technology is adopted to solve, to repair the first surface treatment, and then apply the material to the repair parts, and then use darby, leveling height final inspection material and use sandpaper to suitable size after finish repair work. Five, the step 1) Surface treatment: use the acetylene oxygen wear surface for baking oil processing, and then use the polishing machine polishing metal color, washed with anhydrous ethanol; 2) Harmonic materials: in strict accordance with the 2211 f metal repair material proportion of harmonic and stir evenly until there is no color difference; 3) Daub material: 2211 f metal repair material apply to repair parts, and then use the darby along the datum, leveling material thickness is slightly higher than the datum; 4) Curing: waiting for the material curing; 5) Dressing: material curing after the completion of the use of oil stone tools such as grinding mating surface, and template rule check material grinding, until meet with requirement. Six, seven, summed up the application instance mill main shaft seal leakage problem is more common in the concentrator equipment, traditional repair technology has been no efficient solution, lead to fault bearing equipment, equipment downtime. Polymer composite materials for on-site repair for such problem has the characteristic such as high efficiency, simple operation, make the equipment situation changes greatly, reduced the difficulty of enterprise equipment lubrication management, optimize the enterprise equipment management. （ Source: the blue)