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Development of Power Operated Chickpea Thresher (a Joint Project by Cdp-brri- BARI)

Md. Syedul Islam
Senior Scientific Officer
Farm Machinery and Postharvest Technology Division, Bangladesh Rice Research Institute, Gazipur-1701

Abstract/ Executive Summary:

Overall performance of the thresher was found satisfactory. The blower was working nicely. The feed tray was also guiding the threshing material satisfactorily. However, the grain separation was yet to be improved and the threshed material was sometimes lumped together and clogged due to the aging of the threshed materials and which possess a different characteristics from rice or wheat. Rubbing action did not occur when the pods passed between the concave and the threshing drum. As a result, some whole or unthreshed pods were found at the delivery chute. The broken and cracked grains were nearly absent. The moisture content of the test material ranged from 10-12 percent.

Keywords: Thresher, Performance, Blower, Feed tray, Broken grain

Location: BRRI HQ, Gazipur

Start Date: 01-07-2012

End Date: 30-06-2013

Program Area: Farm Mechanization

Commodity: Farm machineries, Thresher

Objectives:

i. To modify the BRRI multicrop thresher for chickpea threshing; ii. To evaluate the performance of the modified thresher

Methodology:

The multicrop thresher was modified in the research workshop, BRRI. The modifications were made on cylinder speed, separation mechanism, cutter bar, concave clearance, walker length, cylinder type and conveyor position and adapted for chickpea threshing. Data on uncracked pods, unthreshed grain and threshing efficiency were recorded during threshing of chickpea.

Source of Information: BRRI Annual Internal Review 1993

Article Link (Online Journal):

Funding Source:

1. Government

Budget:

Total Budget (Tk.) :

Achievement/Findings:

1) Grain separation from pod need to be improved further; 2) Blower speed t be increased; 3) Concave gap to be reduced from 3cm to 2cm to provide more rubbing action; 4) Two alternate beater bars would be reincorporated in place of the rasp bars and 5) The oscillation speed of the separator to be increased.

Knowledge Management: Report/Proceedings