Galbiati Group recently implemented, with consequent on site assembly, main drive gears couple addressed to the cement industry.
Technical data:
Gear wheels: outer diameter 1530 mm – band 200 mm – form 10/ Z 141 –Weight 1,300 Kg, in a structure composed by an external 4CrNiMo6 steel ring awkward to high resistance and reclaimed.
Bi-helical Pinion: form 10/ Z 26 – Weight 760 Kg – band 220 mm, in steel 50CrMo4 awkward to high resistance and reclaimed.
Protection of processed parts with Tectyl anti-rust, packaging for maritime shipment to eastern customer of the two gear wheels and the relevant pinion.
Galbiati Group manufactures girth gears for mills and kilns from 4 m to 8 m diameter, made from a forged rim on welded steel structure.
Gear set with 4800 mm/800 mm diameters for a cement mill drive installed at “Industria Cementi Giovanni Rossi S.p.A.”(PC).
Through hardened NiCrMo alloy steel girth gear (260 HBn hardness) module 32 – 148 teeth – facewidth 420 mm, “pre-heating process” electrowelded on fabricated frame.
Pinion module 32 – 23 teeth – facewidth 450 mm, through hardened alloy steel (330 HBn hardness).
Galbiati Group designs and manufactures main and auxiliary gear drives for mills and kilns with rigid electrowelded housings; carburized and quality DIN 6 profile ground teeth; high quality roller type bearings sized for at least 100.000 hours full-load service; splash or forced-feed lubrication. Full speed – reduced load test checks that the temperatures, vibrations, noise level, pressure and oil flow rates meet the design values.
Girth gear for ball mill, 30 m, z 162 and z 20 pinions, made with NiCrMo toothed rim on electrowelded steel frame. Welds are performed by a special controlled preheating and cooling process due to the different carbon contents and different thermal expansion of the materials welded together. Magnetic particle and ultrasonic inspections are performed to confirm the welding full penetration and to detect any possible surface micro-cracks.
Tectyl rust inhibitor is sprayed on all machined surfaces prior to packaged for sea shipment to the end customer in Tunisia.
Friday, September 9, 2011
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