Abstract
The main objective of this thesis is to calculate the different types of stresses. That are acts on the horizontal screw conveyor. And the mass flow rate analysis also done on it, to calculate mass flow rate and extraction efficiency. And the main application of the screw conveyor is in oil industries is to separate the crude part into two or three phases. One is higher phase (solid phase) which stick to the walls of the bowl. The other one is lighter phase (liquid phase) which travels with the conveyor along its entire length, and drops at outlet. Similarly, in agricultural industries, also it may utilize as to transport the grains, from one place to another. In order to achieve this, we may definitely concern about the type material used for the conveyor. The basic factors effect the material of any component are shape, type of application, and type of forces, i.e. stresses and strains, act on the screw conveyor. For this, a mathematical analysis is to be done on the screw conveyor. i.e. using maximum principal stress theory, to calculate equivalent stress and corresponding strains. Similarly, using maximum shear stress theory to calculate maximum shear stress and corresponding strains. And total deformations also. And to support my theoretical analysis. A static structural analysis in ANSYS is done on screw conveyor, and then calculating the same stress, strain and deformation values. On comparing those for three different materials and suggest the best suited material for the screw conveyor. In this thesis, the flow rate analysis on screw conveyor is mainly applied to increasing the mass flow rate of the conveyor. And achieve the higher mass flux for higher loads. In order to support this, may consider the general theoretical analysis of horizontal screw conveyor. And also carry the same analysis in Ansys using fluid flow (CFX) analysis of its workbench. By adopting the same design specifications of conveyor. And on comparing the both theoretical and Ansys based result, choose the safe side of mass flow rate for the same three different materials.
Keywords
Screw conveyor, decanter centrifuge, mass flow rate, centrifugal stress and strain, Ansys CFX
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