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Articles by A.M. Setayesh
Total Records ( 3 ) for A.M. Setayesh
  H.S. Hassani , A. Jafari , S.S. Mohtasebi and A.M. Setayesh
  Grain losses due to harvesting with combine harvester is one of the main obsession in direction of wastes and losses control. For this purpose reduction of losses due to cutting platform of combine which comprises more than 50% of the entire harvesting losses, is one of the main and principle measures in decreasing the combine losses. The JD 1165 combine harvester manufactured by ICM. Company is equipped with variable pulley and belt mechanism for ground speed, which causes lots of vibration and increases the losses and depreciation of the machine. In this study the amount of losses of JD 1165 harvester combine equipped with variable pulley and belt mechanism has tested and investigated. For this purpose a typical JD 1165 combine was selected and adjusted for various functional specifications. Then in Markazi province a field with flat land was chosen, in which 307020 Shahriar and Bekras varieties planted in water farm and in seven repetitions so that the moisture of grains ranged between 8 to 12% the research was carried out. As consequences demonstrated, grain losses induced from platform of the investigated combine gained 1.29% and losses at the back of the combine was 0.96% on average in seven repetitions. In addition, the most amount of damaged grains achieved 10.8% at the speed of 850 rpm for the cylinder. Finally, suggestions were made in order to improve performance of the machine.
  H.S. Hassani , A. Jafari , S. Rafiee , S.S. Mohtasebi and A.M. Setayesh
  The JD 955 combine harvester manufactured by ICM. Company has two hydraulic circuits which are the principal circuit (dividing valve circuit) and the steering circuit. Therefore, investigation and inspection of defects of the hydraulic system used in combine, considering its functions in the machine is so significant. In this article the problems of the hydraulic system throughout JD 955 combine harvester and the way services are given for disappearing the problems, have been investigated. For this purpose some 90 combines were selected which had been supplied to the customers over the last one or two years. The 140 defects detected from their hydraulic circuits were analyzed then services supplied to the selected combines and actually after sales services were researched within some categories. Results showed that the hydraulic pump had the most problems and was spent the most expense. In addition, throughout the after sales service categories only charges of the defects had significant difference with each other. Finally some policies suggested in order to decrease and eliminate the defects.
  H.S. Hassani , A. Jafari , S.S. Mohtasebi and A.M. Setayesh
  Throughout the present research, the gears fatigue of the hydraulic pump for the principal circuit in JD 1165 harvester combine was investigated through the finite element method and using contact analysis for precise determination of the contact region of the engaged teeth so that their lifespan was estimated. For this purpose, first, the gears were modelled and with applying material specifications, contact and fatigue analysis were carried out sequentially utilising ANSYS software. The reason for performing this research was to study the intended gears behavior affected by fatigue phenomenon due to the cyclic loadings and to consider the results for more savings in time and costs, as two very significant parameters relevant to manufacturing. The results indicate that with fully reverse loading, one can estimate longevity of a gear as well as find the critical points that more possibly the crack growth initiate from. For the investigated gears, the most critical points were detected as nodes numbered 36573 and 37247. Furthermore, the allowable number of load cycles and using fully reverse loading was gained 0.9800E+07. It is suggested that the results obtained can be useful to bring about modifications in the process of the above-mentioned gears manufacturing.
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