Development a thresher for wheat crop of beater type for maximum productivity [electronic resource].

Includes references.

The aim of this study is development a thresher machine which commonly used under Egyptian condition in order to give high purity, low losses (fan losses + losses behind sieve), less unthreashed grain and less total grain damage. This developed expect to increase the production by increasing feed rate, through remove the feeding auger to increase feed rate due to increasing production. The studied variable included: Drum speed 747, 870, and 993 r.p.m. feed rate, 1 JO, 1200, and 1400 kg/h., air speed suction 16, 32, and 64 mIs, air blower speed d, 6. and 9 m/s. (sieve oscillation 415,593. and 771 rpm), sieve tilt angle 2, 5. and 8 degree, and moisture content 13.5 %. On purity, fan losses, losses behind sieve, unthreashed grain, total grain, damage and machine productivity. The optimum conditions of machine to be operated at the maximum efficiency are: Drum speed 870 rpm feed rate, 1200 kg/h., air speed at suction 32 m/s, blower air speed 6 m/s. (sieve oscillation 593 rpm), sieve tilt angle 5 degree, and moisture content 13.5 %. With machine purity 99.30 %, fan losses were 0.11 %, . losses behind sieve zero %, unthreashed grain 0.05 %, and total damage grain zero %. And machine productivity 800 kg/h.. It was found that the operation cost of the machine is 15.55 L.E./h., unit cost 19.445 L.E.I ton, seed losses equivalent 0.27 L.E./ton, and criterion cost (operating cost + losses) 19.72 L.E./ton.

Summary in Arabic.

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