Sorghum harvester work quality assessment

Abstract

The article presents the results of experimental research on the sorghum harvester, equipped with a threshing-separating device of the inertial-combing type for harvesting Donskoe-35 variety broom sorghum, work quality in the conditions of farms in the south-western zone of the Volgograd region of Russia. The heads losses change (Qm) dependences on the combine speed (Vk) were determined: before the threshing chamber Qm = – 0.079Vk 2 + 0.426Vk + 0.01, behind the header Qm = – 0.133Vk 3 + 1.2Vk 2 – 3.567Vk + 4.1 and after the threshing chamber Qm = 0.057Vk 2 – 0.321Vk + 1.046, as well as grain losses (Qz): behind the normalizer Qz = 0,03Vk 3 – 0,241Vk 2 + 0,686Vk – 0,083, by the Qz = 0,004Vk 2 + 0,025Vk + 0,28 and under-threshing in a head Qz = 0,033Vk 2 – 0,032Vk + 0,204. The sorghum harvester threshing growing heads by a threshing-separating device of an inertial-combing type showed a high quality of work: an increased level of heads losses was observed behind the header at combine speeds up to 1.5 m/s, but they did not exceed 2.6% at a combine speed of 0.5 m/s; while studying types of grain losses, the losses behind the normalizer reached the level of 0.6% at a combine speed of 3.0 m/s; the loss of grain behind the thresher and under-threshing in the head did not exceed 0.4%.

Analysis of the cutting machine movement across the field when harvesting dead crops

“…At the same time, the knife bar to which they are attached is also quite rigid, which eliminates the possibility of its deflection on the inter-support span. As a result, any movement of the supports along the irregularities of the field is transmitted directly to the entire cutting machine [6]. This determines the nature or type of its movement on the field.…”