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Development of Groundnut Sheller

M. H. K. Khandker
Agricultural Engineering Division, Bangladesh Agricultural Research Council, Dhaka

M. A. Baqui
Agricultural Engineering Division, BRRI, Joydebpur, Gazipur.

K. A. Haq
Member Director (irrigation)
BADC, Dhaka

Abstract/ Executive Summary:

A manually operated groundnut sheller has been designed and fabricated. The capacity of the sheller was about 40-45 kg/hr with the whole size kernel recovery of 80-90%. The percentage of visible damage was 2 to 3% at a shelling efficiency of 90-95%. The gross amount of energy spent for manual operation ranged from 6.7 to 8.6 kcal/min and the actual net energy required to run the machine ranged from 1.6 to 3.5 kcal/min, The prcduction cost ot the machine was Tk, 1000.00 (us $ 30)

Keywords: Kernal, Shelling Efficiency, Visible Darnage

Location: Agricultural Engineering Division, BRRI, Joydebpur, Gazipur

Start Date:

End Date:

Program Area: Farming System

Commodity: Product development

Objectives:

To develop a simple low cost and efficient manually operated groundnut sheller to avoid some difficulties of shelling groundnut.

Methodology:

The evaluation of the concept for shelling groundnut using the shearing action between a rubber tire and wire mesh, has shown promising results. The final proto-type of the groundnut sheller was then designed and constructed. This proto-type consists mainly of a main frame, a rubber frame, a rubber tire assembly, a concave and a hopper. Since it has been observed that the tire with a small amount of inflation or without inflation could be used satisfactorily to shell the groundnut, the inner tube and the wheel rim were not used in the final design in order to reduce the total cost of the sheller. The clearance between the concave and the tire can be adjusted by raising or lowering the spring loaded nut and bolt attachment between the main frame assembly and the tire assembly. A worn out rubber tire was used after retreading. Retreading of the worn out tire was done by a hand gringed. The concave is a 9 X 9 mm wire mesh. The mid poinr of the concave is directly underneath the centre of the rubber tire. The cost of fabrication of the machine was Tk. 1000/- (US $ 33). After that "Performance Test and Ergonomic Test" was done by following the standard procedure.

Source of Information: Bangladesh Journal of Agricultural Engineering, Vol. 2, No. 2, July 1988

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The following conclusions could be drawn from the study carried out to develop the groundnut sheller:

The performance of the sheller was satisfactory when the clearance between the concave and the rubber tire was equal to or 10% less than the average major diameter of the groundnuts.
The maximum energy by expenditure by human operators and the actual energy needed to run the machine were 8.5 kcal/min and 3.45 kcal/min, respectively. This indicated that manual operation was feasible as the machine would demand only a moderate work load on the human operator.
The total fabrication cost of the machine was Tk. 1000.00 (US $ 33) which is within the reach of the small scale farmers.

Knowledge Management: Journal