LABORATORY AND FIELD RESEARCH OF A CROP LIFTER OF A COMBING HEADER

Abstract

The article is devoted to an urgent problem – reducing grain losses during harvesting of lodged grains by the combing method. It provides a description of the design and the principle of operation of the developed copying crop lifter of the combing header, as well as the methodology and the results of laboratory and field studies to substantiate its rational structural and operational parameters. Laboratory and field studies were carried out on the fields of the OOO Russkoye Polye (LLC) of the Penza Region in accordance with GOST 28301 – 2007 «Combine harvesters. Test Methods» in the harvesting of winter wheat. The area of the plot was 12 hectares, the yield was 47 kg/ha, the lodging reached 64%, the ratio of grain mass to straw mass was 1:1.3. The harvesting unit was the Akros – 595 combine harvester with the ZhO – 7 «OZON» combing header equipped with copying crop lifters. Losses after the combing header were determined by the method of the frame superposition. As the results of laboratory and field studies show, the minimum grain losses (no more than 2.5%) when harvesting lodged grains is ensured when the length of the crop lifter L = 470...540 mm, the gas stop pressure P = 50...60 N and the unit operating speed Up = 1,2…2,0 m/s.

Keywords

• cereals
• lodged grain
• combine harvester
• combing header
• copying crop lifter
• grain loss
• field contour following