and conveyor system are illustrated schematically in the second
page. Helical gear at the left end is driven by an electric motor
at a speed of N(rpm) in CW and conveyor system is driven
by spur gear at the right end. The centerline of the spur gears
makes angle ‘α’ with vertical. The cam mechanism allows the
material to flow from the tank and conveyor system moves the
material spilled. Electric motor power is sufficient for continuous
motion of the system. The shaft is supported by two bearings. Axial
load is carried by the bearing at the right end.
- A Shaft Transmission System For Driving A Cam Spring Mechanism And Conveyor System Are Illustrated Schematically In The 1 (22.24 KiB) Viewed 25 times
- A Shaft Transmission System For Driving A Cam Spring Mechanism And Conveyor System Are Illustrated Schematically In The 2 (211.35 KiB) Viewed 25 times
PART A
1. Write down step by step procedure for the design of the
shaft.
DATA DATA DAD3 1,3 D3/D2 1,2 D2/D1 1,1 Motor Speed 'N' (rpm) 300 Factor of Safety, 'n 2 Reliability 95 Material of the Shaft AISIT050(CD) Shaft Surface Machined Infinite Expected Life (cycle) Friction coeff, btw cam and follower 10,3 Conveyor belt tension 'T' (N) 600 Free length of the spring (mm) 160 10*10* Spring constant (N/m) Angle 'a' (°) 30
Front View Right-side View 50 125 75 200 75 200 125 R144 14 A H+13 Cam-spring mechanism Tank Helical gear 194 Electric Motor Conveyor System . All dimensions in mm. All fillet radius=3 mm. . Spur gear
For Helical Gear For Spur Gear Section A-A Pressure Angle () Helix Angle (4) : 20° : 30° Pressure Angle () : 20° A Cam-spring mechanism W, = Witano Wa = W * tany 125 020 W, = W. * tano 316 Conveyor System T会 Wt Wr Wa Wt Wr Assumption: Design considerations will be carried out at the condition of maximum and minimum deflection of the spring by the cam. Inertial forces will be neglected. Note: You may make any reasonable assumptions at any stage of your design study. If any information missing, use your engineering sense and make a logical selection.