Gantry crane gear detection and repair

gantry crane gear defects are: meshing gears wear, broken teeth, hub bore and keyway wear, ring and spoke to crack, cracks, etc. reducer body. The most dangerous flaw is lifting mechanism and luffing mechanism pinion wear.

overhead gantry crane gear tooth wear can be regulated testing. Tooth wear does not exceed the specified limit, can be repaired using. Hoisting mechanism and luffing gear wear than the limits shown in Table 17-5-4, it must be replaced.

hoist gantry crane carts running mechanism and slewing mechanism gear wear, allows repair welding method. However, the modulus of the gear 10 or less, the relative amount of not more than 25% of wear; modulus than the gear 10, the relative wear amount not exceeding 30%. For welding mechanical properties of metallic materials and repair pieces of material must adapt. Should elapse after the repair welding annealing and normalizing.

Hoisting and luffing mechanism broken teeth, rims are not allowed to pass welding defects such as cleft repair. Walking and slewing mechanism hub bore and keyway defect allows the first method of processing after welding repair.