Material Handling Equipment

A horizontal screw conveyor has screw diameter $D = 0.30\text{ m}$, shaft diameter $d = 0.06\text{ m}$, and pitch $P = 0.30\text{ m}$. It rotates at $N = 60\text{ rpm}$ ($1.0\text{ rev/s}$) with a trough loading efficiency of $\phi = 0.40$. The theoretical volumetric conveying rate in m$^3$/s is: (Area of screw cross section $= \frac{\pi}{4}(D^2 - d^2) = \frac{\pi}{4}(0.09 - 0.0036) = \frac{\pi}{4}(0.0864) = 0.06786\text{ m}^2$)