Drying cylinder bearing wear of carbon nano polymer materials to repair case - bearing knowledge

Drying cylinder bearing wear of repairing the scene analysis and case pictures one paper company 8 workshop 2400 dryer machine in the process of long-term use, due to the damage of bearing, metal fatigue wear and run maintenance does not reach the designated position, lead to paper machine dryer section shaft appear wear phenomenon. Enterprise at present there are a large number of drying cylinder axis wear problem, and many of the equipment to run in spite of serious affect the continuous production of the enterprise. Repair field enterprise personnel and sauvy collaborate with technical staff, staff by the enterprise is responsible for disassembling bearing and shaft surface processing, including surface oil removal and surface grinding, sauvy technical staff responsible for on-site equipment repair process recovery bearing the size of the work, the field is more smooth, only 6 hours is complete bearing level 2 of the repair work. Sauvy industrial drying cylinder bearing wear of carbon nano polymer materials to repair case sauvy industry and some paper for active and fruitful cooperation, the following is the co-operation of drying cylinder bearing repair site. This cooperation to repair the dryer shaft number is 2, 170 mm in diameter, uneven wear quantity is 2 mm, desizing and discharge fit between bearing and bearing a way. 1 cylinder bearing wear of repair operations. Drive shaft rotation speed in < 750 r/min, operating temperature - in 100 200 ℃, and unable to realize machining, tooling repair is online repair technology can guarantee to ensure the best technology of concentricity; 2. According to the situation of wear parts processing unilateral or bilateral ( Front axle shoulder/rear axle shoulder) Positioning folio fixtures, tooling made of thick wall steel tube or round steel wall thickness shall ensure there is enough strength and stiffness, make sure that there is no deformation; Repair the diameter size tolerance in the wear parts based on the original tolerance 0. 03 - 0. 5 mm, both sides have the connecting screw hole, positioning pin hole and slot, nesting nesting unilateral 1 - groove depth 1. 5mm。 3. The preparation work before construction, such as tools, materials and spare parts need to change. 4. Using acetylene gun baked into grease on the surface of the worn parts, carbide to grease. 5. 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. 6. Empty test mould, check with situation. Tooling empty after test have no problem with anhydrous ethanol/acetone after tooling inside surface to wipe clean, besmear brushs SD7000 tuomoji, avoid unnecessary bonding. 7. In strict accordance with the proportion of harmonic sauvy SD7104 carbon nano polymer material, again and again until the color uniform, without off color. The temperature low, want to use iodine tungsten lamp heating material, in order to reconcile. Reconcile the material she into thin slices of the harmonic board, and apply immediately, in case hardening. 8. Daub on the inner wall of the surface repair parts and mould material, when daub on the repair parts surface first apply a layer of thin material, and repeatedly blowing pressure, on the surface of the pressed material into every pore, to ensure that the adhesive; Material thickness shall not exceed the depth of the wear size, avoid to cause early curing temperature and time affects the diameter size of the effect after repair. Get the best filling effect and make sure they have redundant material being squeezed out. Special emphasis, repair material can't spread it to locate and extrusion to locate parts. Ambient temperature below 15 ℃, the available iodine tungsten lamp and other tools to repair parts for heating, heating when daub to ensure material, surface temperature is not lower than 15 ℃, facilitate bonding. Harmonic materials shall be installed in the tooling and tighten in place after 20 minutes to complete, avoid material curing. 9. Curing; When the environment temperature 24 ℃; remove the mould time not less than 6 hours Fully achieve material mechanical properties of 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. 10. Remove the mould; Remove don't hitting in the process, so as to avoid material damage. From discharging hole extrusion materials saw blade, polishing machine, or file, sand paper and other tools to remove, not allowed to tap on a material or with the hand break. 11. Before installation to clean locating sleeve, bearings, and anhydrous ethanol cleaning repair of rear axle head surface residual release agent. 12. Installing a shaft parts, must be in order and use hot assembly, the shaft parts can be easily installed in place, avoid hammering.