4. 6 m slag grinding auxiliary roller device repair

4. 6 m slag vertical mill auxiliary roller device repair - 2019 04 - 23 xiao-min li ( Tangshan Jidong Equipment Engineering Co. , Ltd. ) My company production of 4. 6 m slag vertical mill, there are two main roller and two auxiliary roller, respectively through the inner and outer taper elastic ring fixed on the rocker arm, respectively, relative to 180 & deg; Decorate. Once, auxiliary roller be gland to grind out a irregular pit, we adopt the method of adhesive to repair on the repair. 1 problem and analysis of each auxiliary roller has two bearing ( See figure 1) Aging, in production, due to the lip seal oil, slag powder into the roller, cylindrical roller bearing damage. Because the auxiliary roller tilt installation, end cover for spherical roller bearing, lead to relatively further skew roller hub. In the end, the lip seal deformation damage, wear-resisting axial crack, gland with lip seal surface relative motion, roll shaft gland grinding out a most about 10 mm, arc length, the width of 280 mm, 100 mm axial hole. 2 repair methods of roller material is 42 crmo forgings, repair weld repairs, if the heat is too high, easy to produce non-uniform thermal stress and thermal deformation. Careful calculation analysis axis wear, because the auxiliary roller force is small, and the pit is not, on the mechanical strength of glue to fill in the request is not high, so the titanium alloy repair agent to repair of abrasions, then roll shaft to make use of lathe processing, test. Concrete repair methods: 1) Will the use of portable grinder shaft wear and sandpaper clean, sharp corners in smooth transition, and penetrant inspection, to ensure that no defects. 2) Titanium alloy repair agent. Due to the low temperature in winter, the surface of the axle temperature is low, so must first be heated. Because with flame heating abrasions will produce moisture directly, therefore in the wear and tear on both sides with oxyacetylene flame heating manually, make temperature to wear. Point temperature meter was used to measure temperature of 60 ℃ or so later, daub titanium alloy repair agent, and then use tungsten lamp heating insulation for 2 h, 24 h curing. 3) Processing. The workpiece loading card on the horizontal lathe, alignment. Because & Phi; 330 mm of wear, & Phi; 330 mm wear car to 29 mm length & Phi; 301 ( See figure 2) , detection size bearing level, in order to meet the requirements of the drawings. 4) Assembly. Increasing the length of a 29 mm positioning set of setting out cone between elastic ring and wear-resisting, guarantee the outer cone elastic ring assembly location relatively constant. Switch wear-resisting set at both ends, so, also can ensure the position of 29 mm abrasion on the center of the two preview hole remains the same ( The 138 mm size remains the same in figure 3) , and the abrasion and set of completely covered with repair agent, cooperate with shaft to keep the original precision. Lost foam to prevent repair agent, wear-resisting set before, around the mend with loctite high-temperature sealant, separated and lip seal tank, avoid impurities into the grease. 3 repair effect of the roller repair to the scene after the installation, so far has been running for a year, does not appear any problems, save repair cost and time limit for a project. Source: 'cement' 第05 period in 2015