Question

Question 8 , need help with part (a), (b), (c) values are highlighted

Sandgrous e Co. has hired you as Junior Engineer. Your first task as engineer is to help in the design of an electrical hoist-winch capable to hoist V8 engines at constant sp design is show motor, located at A; a shaft passing thro points C and D; a shaft passing through the points D-E-F; two mating spur gears, locate windlass, located at G; and three bearings, located at B. E, and H n on Figure 1. The design is composed of the following components: an electrical ugh the points A-B-C; a gearbox, located between the d at F, a d4 d3 di d2 D E A B C Table 1. Specifications 9 10 Bottom Top Velocity GearboxGearbox Gear Gear Hoist Dia. d d2d3 d4 Weight weightDia (lb) (inches) (inches) (t0 () (t) t 6.98 0.8 1.3 2 1.5 9.63 0.8 1.4 2 1.4 9.77 0.7 14 2 1.3 6.37 07 5 2 1.2 9.63 0.75 5 2 1.1 5.24 0.8 .5 2.5 2.4 7.23 0.8 6 2.5 2.3 7.33 | 0.7 | 1.7 | 2.5 | 2.2 4.78 0.7 8 2.5 2.1 7.23 0.759 2.5 2 6.61 0.81.3 2 1.5 2.5 9.12 0.8 1.4 2 1.4 926 0.7 14 2 1.3 6.03 0.7 15 2 1.2 9,12 0.75 1s 2 1.1 Number(lb) (ft/sec) Ratio 150 30 15030 30 575 575 575 575 575 0.25 575 0.5 575 575 575 575 0.25 0.25 75 :1 73 :1 30 1501 25 25 150 :1 0.5 0.5 0.33 0.33 0.33 0.33 15 :1 25 7 10 75 25 150 :1 150 :1 600 600 600 600 0.33 600 600 600 600 600 75 :1 75 35 35 2.5 500 40 500 40 300 l 300 1 2.75 9.94 0.8 1.6 2.5 2.3 8.40 0.7 17 2.5 2.2 2.75 5.47 0.7 18 2.5 2.1 2.75 40 215 28 075 19 8.28 0.7 1.9 2.52 Table 2. Materials Su (ksi) Sy(ksi) E (Mpsi)V Case Materials 1-5 AISI 304 S. Steel 6-10 AISI 440 S. Steel 11-15 AISI 610 (H-11) 16-20 AISI 1117 steel 85 105 135 35 60 100 27.5 30 35 32 0.30 0,30 0.29 0.33 IV. Gears Analysis Q8. The two mating steel spur gears shown on Figure 3, located at F on Figure 1, are 0.75-in wide and the tooth profiles have radii of curvature at the line of contact of 0.375 and 0.625 in. A force of to hoist the engine is transmitted between them. Compute the following (a) The maximum contact pressure, in ksi. (b) The width of contact in inches. (c) The maximum shear stress below the surface of contact, in ksi Figure 3. Mating steel spur gears configuration.

Answer 1

2. 2. | 30:35 +1-0: 352.7 ー025 X0.251 32 32- - 2x 2 hsar thess