The Design Problem

You are a trainee Design Engineer at one of the local ore crushing plants. Your immediate

task is to carry out a component failure analysis project for the power transmission system

for operating a ball mill $(8)$ from an induction motor source $(1)$ as shown in Figure $1$ above.

Carry out the following:

T$.$ Re$-$sketch Figure $1$ and label the components appropriately. Explain the working

principle of the assembly and justify why it is not recommended to connect the motor

directly to the ball mill to run it$.$

$[7$ Marks$]$

Analyse the sketched Figure $1$ and, using a simple flow chart, explain how you would

find solutions concerning the overall power transmission problems for the system

shown above $($ie show the design phases$)?$

$[4$ Marks$]$

Component $10$ is chiefly subjected to both torsion and tension. Use the maximum

energy distortion theory $($von Mises theory$)$ to determine its diameter, $d,$ if the

material yield strength is $125$ MPa and the loading is ${}_x={}_1=0$;${}_y={}_2=10kN$;${}_z$

$={}_3=15kN.$

Hint: ${}_e=\frac{1}{\sqrt[\phantom{2}]{2}}\sqrt[\phantom{2}]{[({}_1-{}_2{)}^2+({}_2-{}_3{)}^2+({}_3-{}_1{)}^2]}{}_y$