DESIGN AND ANALYSIS OF HELICAL GEAR IN SLAG PORT TRANSFER CAR GEAR BOX
Keywords:
Gearbox, helical gear, AGMA stress, CREO, ANSYS, pressure angle, helix angle.Abstract
Gears are one of the most critical components in mechanical power transmission systems. They are generally
used to transmit power and torque. The efficiency of power transmission through gears is very high when compared to other
kind of transmission. The major factors for the failure of gear tooth are contact stress and bending stress. The present
investigation is carried on helical gear which is related to slag transfer in the steel manufacturing industry. By analysing the
contact stresses for existing design set of gears, the most effected stress concentrated area of any set of gears in the slag port
transfer car (SPTC) gear box is discerned. The re-design of the high stress concentrated gear set took place at constant
Pressure angle (20˚) and different Helix angles (14, 15, 16, 17˚, 20˚, 25˚, 30˚) with constant (45mm) Face width. The
theoretical approach is based on AGMA contact stress equation, to determine the contact stresses between two mating gears.
A Three-dimensional solid model is generated by CREO 3.0 parametric which is powerful and modern solid modelling
software. The numerical analysis was performed in ANSYS Workbench module. The results obtained from ANSYS values are
compared with theoretical values are in close agreement. The present analysis is useful in quantifying the above said
parameters that helps in safe and efficient design of the helical gear in SPTC Gearbox.
