Tube bank dryer bearing a wear? No repair welding, brush plating, repair, new method - bearing knowledge

Tube bank dryer equipment during operation, the rotor on both ends of the bearing support, one end is fixed bearing, one end is free to swim, consumption of thermal expansion. And this kind of equipment in the work is the most common bearing wear and abrasion of interval sets installed a, in order to let everybody to see more of this kind of situation, China bearing network according to understand, to share a good way to repair. Maintenance for many companies often master when meeting this kind of situation, will be conducted by adopting the method of repair welding, brush plating, completing this actually also cause equipment secondary damage, so we have to find the specific reason, a more suitable maintenance method, to make tube bank dryer bearing wear better repair. Causes of bearing wear, concluded after analysis the cause of bearing wear and interval set position for gear pressure plate and set loose casing pressure plate or inadequate pretightening set set and interval set and the axial relative motion and dynamic, cause the diameter of axle wear. Wearing a better method of fixed tube bank dryer bearing: for such transmission parts wear problem, traditional repair process is often after removal to repair workshop equipment repair welding machining processing, down time is longer, and repair welding process is easy to cause thermal stress, lead to deformation of shaft bending, causing irreversible damage. And traditional brush plating process for plating thickness generally have a requirement, can not meet the thickness of the centimeter level. Other than no matter use what kind of repair technology are impossible to achieve in the short term equipment boot operation conditions, so the above several solutions is obviously not suitable for the dryer shaft wear repair requirements. Aimed at the abrasion of the shaft, combined with several traditional repair process to determine the scene of the use of polymer composite materials to repair solution. Polymer composite materials for bearing a wear problem according to equipment parameters such as speed, bearing type, use requirement to select different equipment repair process, one of the most commonly used for mould repair process ( See image below) Use of material properties, the repair process, in combination with the practical situation of the scene processing repair tools, is the use of compression molding according to the positioning parts repair worn parts of a process at the site, a short time to repair, repair of high precision, low repair cost, no secondary damage to equipment, easy operation, etc. Repair the tube bank dryer bearing wear specific steps: 1, the position of the auxiliary repair process is mainly used in wear size are relatively uniform, equipment parts under the condition of running speed is not high, in order to meet the normal operation of the equipment; 2, the preparation work before construction, such as tools, materials, and need to change the spare parts ( The axial adjustment ring, remove the installation tools, oxygen - Acetylene gas cutting tools, micrometer, gasket, anhydrous ethanol, harmonic board) And so on; 3, repair, completes the personnel security measures; 4, check the shaft end before remove the bearing wear conditions, wear and tear of the axial and radial relations are detailed measurements. Using carefully measuring feeler gage to wear such as position, according to the wear condition to determine the repair plan; 5, according to the abrasion of the axial and radial orientation of axial and radial auxiliary method, maximum limit to ensure alignment to ensure the use of fixed effects; 6, test and bearing, at room temperature using the standard size of bearing inner ring, by adding the anchor point to meet the requirements of bearing assembly; 7, gas welding gun baked into the wear parts on the surface of the grease, carbide to Mars, grease. With sand blasting or power tool will repair parts with metal color, clean thoroughly with anhydrous ethanol. To ensure that the surface is clean, dry, rough, strong; 8, bearing inner ring surface cleaned with anhydrous ethanol, brush release agent for standby; 9, in strict accordance with the proportion of mixed 2211 f metal repair materials and stir evenly until there is no color difference. The temperature low, want to use iodine tungsten lamp heating material, in order to reconcile. Reconcile the material should be in harmonic board she into chips, and immediately daub, mixed material should be used in 20 minutes to complete, avoid material curing. 10, using 2211 f metal repair materials will wear position filled and slightly bigger than the wear volume. 11, mold assembly, waiting for the material curing; When the environment temperature 24 ℃ completely achieve material mechanical properties not less than 24 hours, but per 11 ℃ temperature curing time by half. Pay attention to, not with flame, direct contact with the material and heating temperature shall not exceed the material the highest temperature, don't let the material temperature and substrate temperature difference is too big, rising and dropping drastically to avoid. Remove the bearing inspection after repair parts with and without defects, coating material fastening bearing again. 12, the taper bearings must be fast hot charging bearings, avoid early curing and affected by the temperature and time affect the diameter size after repair. Pay attention to the bearing installation technique, control of bearing axial runout avoid to cause damage to the anchor point. Bearing inner ring in the process of installation and repair of bearing formed between compacted fill and make sure they have the extra material being squeezed out. 13, according to the requirements of the bearing assembly process fixed bearing, bearing in axial positioning. 14, when stop check pressure plate in time, in use process found loose timely processing. Through this repair, once again proved that high polymer composite material collocation of mold can be a very good solution to solve the equipment transmission parts wear problem, proved that the use of polymer composite materials to repair technology have higher accuracy and the repair of good satisfy the requirement of the equipment precision, has the repair cost is low, the repair time is short, no secondary damage to equipment, simple operation and other advantages.