Material Handling: Belt, Screw & Bucket Conveyors

In a centrifugal discharge bucket elevator, clean discharge of grain at the head pulley requires that the centrifugal acceleration ($v^2/R$) at the pulley rim satisfies:

Options:

• (A) $\frac{v^2}{R} \ge g$ (centrifugal force overcomes gravitational force)
• (B) $\frac{v^2}{R} = 0$
• (C) Belt speed is less than 0.2 m/s
• (D) Elevator height is infinite