Groundnut product demand is on the increase and the application is largely dependent on the cleanness of the nuts. The separation process is usually an energy-sapping task that requires a lot of time.
In order to separate the nuts from its shell effectively a shelling machine was developed. The machine employs an auger screw as a means of breaking the groundnut pod. The machine basically comprises of shelling chamber, separating chamber and a motor (1HP). The arrangement of these parts is connected by a compound belt of type B standard V-belt of pitch length 1694mm. With the Von-mises equation, the material for the shelling shaft is taken to be mild steel. The materials used in the fabrication of the machine are sourced locally so as to ensure that it is cheap, affordable and easily maintained by the peasant farmers. The shelling efficiency and material damage are 84% and 14% respectively for groundnut seeds of 86.5% dry.
TABLE OF CONTENTS
1.0 INTRODUCTION
2.0 MATERIALS AND METHODS
2.1 Materials
2.2 Description of the Groundnut Shelling Machine
2.3 Design Analysis and Calculation
2.3.1 Determination of Crushing Power to Break the Pod
2.3.2 Determination of the Pulley Diameters
2.3.3 Determination of the length of the belt
2.3.4 Determination of Tension in the Belt
2.3.5. Determination of the bending moments acting on the shaft
2.3.6 Determination of the shaft diameter for auger
2.3.7 Determination of the shaft material
2.3.8 Determination of the size of power to drive the fan
2.3.9 Determination of auger capacity
2.3.10 Determination of a size of the key
2.4 Fabrication Process
2.5 Operation of the shelling machine
2.6 Performance Evaluation
3.0 RESULT AND DISCUSSION
4.0 CONCLUSION AND RECOMMENDATIONS
REFERENCES
- Quote paper
- S.O. Ejiko (Author), J.T. Adu (Author), Osayomi Peters (Author), 2015, Design and Fabrication of Groundnut Shelling Machine, Munich, GRIN Verlag, https://www.grin.com/document/306848
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