Effect of threshing-separating device parameters on threshing

Introduction. Promising modern high-performance combine harvesters should be created on the basis of new principles and solutions for improving the quality of the threshing and grain separation processes in field operations. Grain infestation is a factor complicating threshing. To optimize threshing, it is advisable to adjust the threshing-separating device parameters, to determine the grain separation and its contamination regularities due to humidity, changes in the grain feeding, the threshing gap dimension and the drum rotation frequency. Materials and Methods. The experiments were carried out on the threshing of winter wheat of the Don semi-dwarf variety. A laboratory-field threshing apparatus was used. In the course of the experiments, the separating property of the threshing-separating device of a tangential-axial type in the form of a one-nappe revolution hyperboloid was studied. Research Results. Based on the results of the experiments, the charts of the threshed material separation and clogging depending on the grain feeding, the threshing clearance, the humidity of the threshed mass and the drum rotational speed are plotted. Discussion and Conclusions. As a result of the studies, a significant effect of the working parameters of the thresher on the quality factors and the level of grain losses in threshing is proved.

1. Lapen, D.-R., et al. Combination cone penetration resistance/water content instrumentation to evaluate cone penetration- water content relationships in tillage research. Soil & Tillage Research, 2003, no. 58, pp. 193–206.

2. Salloum, W., Bahlawan, H.. Design of Penetrometer Cone for Measuring Soil Penetration Resistance and Determine Soil Porosity. Research Journal of Aleppo University, 2009, no. 76, pp. 40–57.

3. Antipas, I.-R., Dyachenko, A.G., Savostina, T.P. Issledovanie protsessa obmolota tangentsial'no-aksial'nym separiruyushchim ustroystvom v zavisimosti ot raspredeleniya zernovoy massy po zonam. [Study on threshing process by a tangental- axial separating device depending on the zonal distribution of the grain mass.] Science Review, 2016, no. 23, pp. 87– 91 (in Russian).

4. Dyachenko, A.G., Savostina, T.P. Obespechenie ravnomernosti zernovoy massy pri obmolote tangentsial'noaksial'nym molotil'no-separiruyushchim ustroystvom. [Uniformity control of the grain mass under threshing by a tangentalaxial threshing- separating device.] Sostoyanie i perspektivy razvitiya sel'skokhozyaystvennogo mashinostroeniya : sb. statey 10-y Mezhdunar. nauch.-prakt. konf. v ramkakh 20-y Mezhdunar. agroprom. vystavki «Interagromash-2017». [State and prospects of development of agricultural machinery: Proc. 10th Int. Sci.-Pract. Conf. within framework of 20-th agroindustrial exhibition "Interagromash-2017".] Rostov-on-Don, 2017, pp. 41–43 (in Russian).

5. Antipas, I.-R., Savostina, T.P. Vliyanie sekundnoy podachi na protsess obmolota tangentsial'no-aksial'nym molotil-'no-separiruyushchim ustroystvom. [Impact of second feed for the threshing process of the tangential-axial breaking unit. ] Science Review, 2017, no. 3, pp. 47–51 (in Russian).

6. Kharmanda, G., Antipas, I. Reliability-based design optimization strategy for soil tillage equipment considering soil parameter uncertainty. Vestnik of DSTU, 2016, vol. 16, no. 2 (85), pp. 136–147.

7. Kharmanda, G., Antipas, I. Integration of Reliability Concept into Soil Tillage Machine Design. Vestnik of DSTU, 2015, vol. 15, no. 2 (81), pp. 22–31.

8. Antipas, I.-R., Dyachenko, A.G. Tekhnicheskie parametry modifitsirovannoy seyalki dlya vyseva zernovykh kul'tur v tyazhelye po mekhanicheskomu sostavu pochvy. [Technical parameters of modified seed drill for sowing grain crops in heavy soils.] Vestnik of DSTU, 2015, vol. 15, no. 3 (82), pp. 81–8 (in Russian).

9. Antipas, I.-R., Dyachenko, A.G. Evaluation of soil force of resistance to penetration with the use of new design of penetrometer's probe tip. International Journal of Environmental and Science Education, 2016, vol. 11, no. 18, pp. 10941– 10950.

10. Antipas, I.-R., Dyachenko, A.G. Ispol'zovanie metoda podachi vozdukha pod davleniem v pochvu dlya opredeleniya sily soprotivleniya proniknoveniyu pri razlichnoy vlazhnosti. [Using the technique of air injection into soil to determine penetration resistance force at different humidity.] Vestnik of DSTU, 2016, vol. 16, no. 4 (87), pp. 155–163 (in Russian).