oci ** Question 1 An engineer is asked to design a machine shaft which will be supported in bearings 900mm apart. Power

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Oci Question 1 An Engineer Is Asked To Design A Machine Shaft Which Will Be Supported In Bearings 900mm Apart Power 1 (105.36 KiB) Viewed 24 times

oci ** Question 1 An engineer is asked to design a machine shaft which will be supported in bearings 900mm apart. Power is supplied to the shaft through a 420mm diameter pulley running at 600 rpm and located 250mm to the left of the left-hand bearing. Power is transmitted from the shaft through a pitch circle diameter 210mm spur gear located 200mm to the left of the right-hand bearing. The belt drive is horizontal and the two belt tensions are: T1 = 1500N (top section) and T2 = 640N (bottom section). The belt pulley weighs 100kg. The forces on the gear due to the power transmitted are horizontal 1800N and vertical 800N. If the solid shaft material has an ultimate shear strength of 410 MPa and ultimate tensile stress is 620MPa, neglecting fatigue factors and using a factor of safety of 6. The modulus of rigidity can be assumed to be 87 GPa. 1.1 1.3 FACULTY OF (5) Draw a neat, labelled sketch of the drive train indicating all force vectors and relevant information. Show front and end view. 1.2 Draw a neat fully labelled sketch of the Vertical free body and bending moment (show calculations) diagrams. (4) 1.4 1.5 calculations) diagrams. 1.6 1.7 1.8 Draw a neat fully labelled sketch of the Horizontal free body and bending 1440 Determine the maximum bending moment where the shaft will fail. Determine the Torque transmitted by the shaft. Determine the shaft diameter using Guest theory. Determine the shaft diameter using Rankine theory. Determine the shaft deflection in degrees. Kg/m³ 2,8x106 Pa 1200 Wea moment (show (4) (4) (2) (5) (5) (3) [32] 7101/min 1,3 - 15 kg. 2.1. 2.1. P= 2πNT 60 15x 1,3 = Speed 2.3. 22,5 Kw Ration mar O c = S 93