- 1 17 Figure 1 8 Shows A Line Shaft On Which Two Gears A And C And A Pulley B Are Mounted Gear A Receives 25 Kw From 1 (202.39 KiB) Viewed 40 times
Subject-Mechanical design 3
1.17 Figure 1.8 shows a line shaft on which two gears, A and C, and a pulley, B, are mounted. Gear A receives 25 kW from a motor pinion mounted as shown. Gear C de- livers 17 kW to another gear in such a way that the line joining the wheel centres is 30° to the vertical. Both gear wheels (A and C) are 20° full-depth involute form, Ahav- ing a pitch circle diameter of 450 mm and Chaving a pitch circle diameter of 300 mm. The positions of the three ele- ments are as indicated. The resultant of the belt tensions is a force of P = 1 200 N, acting as shown. The shaft speed is 420 r/min. Design the shaft. Design stresses are = 35 MPa and a = 55 MPa. Check the torsional rigidity (60 mm;0,55 between Aande) pulley (8kW) gear A (25 kW) gear (17kW) 0.2 1.8 0.3 0,2 P-1200N motor pinion