Development a Locale Thresher Machine for Separating Peanut Crop

Abstract

A threshing process for peanut crop is considered one of the most essential agricultural operations. Therefore, the research aimed to develop a local threshing machine for separating and extracting the peanut pods from straw and other materials. This was done by replacing the normal concave with a new one with opening of 7×7cm per opening (square shape). The front sieve is replaced with its last holes in the form of slides, with a distance of 0.5 cm. And adjusting the clearance between the threshing drum and concave in range of 7cm for drum-type (1) and the clearance between the threshing drum and concave should be 5cm for drum-type (2), The experimental work was carried out at El Delengat district, Behera Governorate. The performance of the thresher was tested under three crop feeding rates of 15, 20, and 25 kg/min, meanwhile, four speeds for a threshing drum 300, 350, 400, and 450 rpm (10.99, 12.82, 14.65, and 16.48m/s) and two types of threshing drums were tested, drum-type (1) 44 knives with a concave clearance 7cm and drum-type (2) 22 knives with a concave clearance 5cm. The results conducted that, the highest threshing efficiency (99. 7%) was obtained by drum type (2) under 450 rpm drum speed and 15kg/min feeding rate. The modified drum type (2) showed the lowest broken pods with an average of 1.93%. The lowest required power (12.2 kW) was shown under 300 rpm drum speed and 15 kg/min feeding rate.

Test and Evaluation of the Factors Affecting on the Freshly Harvested Peanut Threshing Machine Performance

“…Past studies have reported that the optimal selection of threshing rotational speed and the thresher-concave distance can increase the threshing Feeding rate, (kg•h -1 ) efficiency and also reduce the broken pod percentage simultaneously. These results are consistent with the results achieved in this study (Aboegela and Mourad, 2021;Senthilkumar et al, 2017;Srinivasan et al, 2021;Vennela et al, 2018).…”

“…According to initial experiments, it was found that at the rotational speed less than 50 rpm the tresher does not have a high ability to separate the seeds from the pod, although the percent of damaged seeds is low. According to previous studies, at a rotational speed greater than 100 rpm, threshers have a high ability to separate seeds from the pod, however the number of damaged seeds has also increased with increasing threshing speed (Aboegela and Mourad, 2021;Senthilkumar et al, 2017;Srinivasan et al, 2021;Vennela et al, 2018). Therefore, in this experiment, the thresher rotational speed was selected between 100 and 300 rpm to determine the optimal value of the thresher speed in combination with the feeding rate and the thresher-concave distance (Table 1).…”

“…The working capacity of the PTO power thresher was also found to be 4 times higher than that of the manual pedal thresher (Vennela et al, 2018). Aboegela and Mourad (2021) tested an experimental thresher to separate peanut seeds from pods using rasp, spike teeth, and knife threshers. It was found that efficiency of the process increased as the threshing rotational speed increased and the feeding rate decreased.…”

“…It was found that efficiency of the process increased as the threshing rotational speed increased and the feeding rate decreased. Additionally, the highest efficiency was obtained with the knife-type thresher (Aboegela and Mourad, 2021). The effect of the rotation speed of the thresher, the material of the thresher blade, and the number of thresher rasp bars were investigated in another study.…”