Question

A pair of bevel gears is required to transmit 11 kW at 500 r.p.m. from the motor shaft to another shaft, the speed reduction being 3 : 1. The shafts are inclined at 60º. The pinion is to have 24 teeth with a pressure angle of 20º and is to be made of cast steel having a static stress of 80 MPa. The gear is to be made of cast iron with a static stress of 55 MPa. The tooth form factor may be taken as y = 0.154 – 0.912/TE, where TE is formative number of teeth. The velocity factor may be taken as 3 3 + v , where v is the pitch line velocity in m/s. The face width may be taken as 1/4 th of the slant height of the pitch cone. The mid-plane of the gear is 100 mm from the left hand bearing and 125 mm from the right hand bearing. The gear shaft is to be made of colled-rolled steel for which the allowable tensile stress may be taken as 80 MPa. Design the gears and the gear shaft.

Answer 1

2134y x 0.12 25637.20 - 330 T3-313 T4- 2 82 -та-ту-313-294 :19 LmT 16 24 19 CIS.tt3S1S)X103 Jpu (250メ丹x1า.D4も) m2 ะ 0.9079 (76-313.20): 2h:995 T-Q9.733十313-20 Scanned by CamScanner