EFFECT OF AIR FLOW RATE OF WINNOWING FAN ON PERFORMANCE OF RICE COMBINE HARVESTER MACHINE

El- Attar, M.A.; Khodeir, M.A.; Soliman, A.A.; El-Khateeb, H.

doi:10.21608/mjae.2014.99580

EFFECT OF AIR FLOW RATE OF WINNOWING FAN ON PERFORMANCE OF RICE COMBINE HARVESTER MACHINE

Document Type : Original Article

Authors

Agric. Eng. Res. Inst., El-Dokki – Giza - Egypt.

10.21608/mjae.2014.99580

Abstract

Field experiments were carried out at the experimental field of Rice Mechanization center, Meet El-Deeba, kafre El-Sheikh Governorate, Egypt. Japanese combine harvesting machine, yanmar model CA- 385 (hold-in), cutting width 1400 mm, crawler traveling unit, adjusted pick tines and star wheels, were tested at three air flow rates of (0.25, 0.32 and 0.40 m³/s) and three different forward speeds of (0.94,1.62 and 2.88 km/h). The combine test to harvest rice variety (Sakha 101).
The results revealed that all kinds of losses (header and threshing) was minimum of 0.69 and 0.90% at forward speed of 0.94 km/h. Also, the lowest value of cleaning and total losses was 0.30 and 1.89% at air flow rate 0.25 m³/s and forward speed of 0.94 km/h, respectively.
The highest value of combine performance efficiency was 98.0% at air flow rate of 0.25m³/s and forward speed of 0.94km/h.
By decreasing the air flow rate from 0.40. 0.32 and 0.25 m³/s tends to increase the whole grain from (79.2, 80.7 and 84.3%), empty grain form (0.44, 0.55 and 0.81%), impurity from (0.35, 0.51 and 1.0%) and grain with pedicel from (8.3, 13.8 and 16.4%), respectively, at forward speed of 0.94 km/h.
Increasing the forward speed from 0.94, 1.62 and 2.88 km/h tends to decrease the criterion cost from 99.7,98.2and 97.3 LE/fed.

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