Dryer practical papermaking industry bearing wearing repair methods of the parade

Practical papermaking industry drying cylinder bearing a ranking of 2018 - wear repair method 11 - 3 f the blue' Abstract 】 : in this paper, for paper industry of drying cylinder bearing abrasion reasons were analyzed, and puts forward the multiple dryer for bearing an on-site repair technology solutions; In the operation of the dryer and the production under the high temperature working environment for the reliability of the tolerance of the blue products, technical analysis, use of after repair cycle, sexual price and so on has carried on the comprehensive evaluation. 【 Keywords 】 : drying cylinder, bearing wear, paper machine, field repair, transmission parts wear, diameter of axle wear a dryer, equipment introduction is made of cast iron with a cover on both ends of the hollow cylinder ( See figure 1) , which is made up of at the ends of the cylinder block and cylinder head, outer diameter is 1000 ~ 3000 mm more, in the process of operation, the steam will transfer paper baking hot light. Paper machine dryer with cast iron is used as the paper belongs to the key components of the dry Ⅰ class pressure vessel. The number of cast iron cylinder accounts for about two-thirds of the total number of papermaking industry pressure vessel. Dryer manufacturing as much material for HT200, HT250. On manufacturing quality request strictly, forbid to penetrate and excessive sand holes, in order to increase the paper smoothness, requested the cylinder surface polishing and the inner surface rotation, to keep the whole cylinder wall thickness is consistent, to ensure the safety of the dryer, balance and heat evenly throughout. The moisture in the role of the dryer is used for baking sheet, trims on paper. Is the most critical in the production of paper core. Second, the site condition indicate that the papermaking enterprises in normal production for 3 # dryer drive side bearing wear problem caused downtime, the drying cylinder bearing a & phi; 170 mm, bearing models for 22236, the way the bearing and shaft for tight fit, maximize uneven wear quantity is 15 mm. Three, dryer equipment problem analysis used bearings for the double LieDiao roller bearing, the way the bearing and shaft generally have the back sleeve, sleeve and the cone axis to cooperate. Drying cylinder bearing a high working temperature, drive side by steam, in normal production and operation of bearing in a sealed environment to normal operating temperature above 80 ℃, bearing components will therefore heat expansion, so in the process of operation of bearing radial clearance size greater than conventional theory under clearance, it is easier to make the material into attachment, due to material into easy to cause the roller surface contact with the raceway appear fatigue, caused by bearing roller running resistance increases, the roller surface appear small pitting or pit type flaking, and spalling of metal can be attached on the raceway surface of raceway surface roughness. Another dryer because bearing a harsh operation environment, the paper machine drying cadre likely to occur under the condition of low speed, overload, high temperature adhesive wear, and then again the raceway surface roughness. In production in the operation of the bearing inner ring friction heat continuously, and lead to inner ring expansion, and the diameter of axle surface fitting clearance, if not handled in time replace bearing is bound to cause the bearing inner ring and shaft relative motion causing wear and tear. Four dryer, bearing a repair process of the comprehensive comparison for different papermaking enterprises dryer for bearing wear repair methods mainly include: spray, brush plating, welding, four ways f the blue polymer composite materials to repair. We are to make a simple comparison between four repair methods in the following table: due to the above several kinds of traditional repair process repair for a long time and do not have economic advantages, so choose the blue repair process to repair. If it is only because of the large amount of the wear and tear, heap apply on use of polymer composite material, due to the liquidity before curing of composites, it is difficult to one-off piled material apply to unilateral 15 mm thickness, thickness of several times must apply the material to the corresponding use again after restoring the precision mould. So in order to shorten downtime, reducing frequency of material apply, we first according to the wear of bearing high processing size thickness of 8 mm collar ( See figure 2) Shaft sleeve stick, and then use the material to repair parts, with a pin sleeve is fixed to the shaft, then daub on shaft sleeve material assembly mould ( See figure 3) Restoring the dimensional accuracy. Five, the site repair, repair process 1) According to the drawing requirements and field measurement size, processing mould and shaft sleeve; 2) Surface baked oil processing, and then polished, bared metal luster; 3) Collar and tie wire assembly in shaft sleeve fixed groove fixed shaft sleeve; 4) According to the corresponding position on the shaft drilling collar pin hole position; 5) Remove the collar; 6) According to the proportion of mixed 2211 f metal repair materials and apply to the wear and tear parts; 7) Assembly bushings, and fixed pin; 8) Grind the shaft sleeve, coarsening surface; 9) Mold inner hole brush release agent; 10) Again according to the proportion of mixed 2211 f metal repair material, apply to the shaft sleeve assembly after mould; 11) Waiting for the material curing; 12) Material curing after the completion of the repair grinding surface; 13) Again daub materials assembly sleeve, bearings; 2, the application of image information: six, the conclusion for all sorts of equipment damage, f the blue company through more than ten years of application, the accumulation of technology and innovation for a large number of field application. Repairing the above mentioned methods of drying cylinder bearing wear problem, the traditional repair process has simple operation, low cost, easy to implement, tested, repaired cylinder bearing potential to reach a long service life. By the late application effect of tracking compared with the traditional process from polymer composites can be very good application in all kinds of transmission parts wear, in order to prolong the service life of equipment, to shorten downtime, bring good economic benefits.