Methodology of grain heap quantity and structure determination and economic evaluation of harvester-thresher cleaning enhancement

Abstract

Analytical studies concerning the issues of heap supply for harvester-thresher cleaning, composition of tailings and the amount of grain are presented in the paper. The urgent problem of increasing the separation of air-sieve cleaning of modern combines is outlined. The schematic structure of the combine thresher is presented. The calculation of the grain mass quantity which is received for cleaning from the threshing group, the straw rack and finish threshing device is conducted. The visual image of cleaning load depending on supply is shown. According to the calculations it is possible to predict the loading of cleaning with small grain heaps depending on the total supply of grain mass to the thresher for combines of various classes. The technical solution to improve the cleaning system of a combine harvester is suggested and economically evaluated in the paper.

Improving combine harvester productivity as the main factor of increasing the economic efficiency of grain-harvesting process

“…Consequently, the development of this direction can lead to designing the air-sieve cleaning, which can increase the level of grain cleaning quality, help to decrease grain losses, and provide purity of the grain in the bunker. The findings of the research conducted led to the conclusion about the possibility of pneumatic and inertia separator use in the design of small grain heap cleaning of the highproducing combine harvester, which in turn serves as a starting point for economic benefit achievement [1,2]. The engineering study carried out earlier made it possible to conclude that the existing features of the system operation include the acceleration of the grain heap feed by the blade rotor, while the grain heap is fed only to the surface of the chaffer sieve made of separating elements, where the air is blown actively.…”

“…To determine the operating costs savings for the consumer the items of operating costs are calculated in the paper, which will change as a result of the implementation of the suggested technical solution. The effect for the consumer ( ) can be represented in the form of operating costs decrease in comparison with the basic case and determined by the formula: (1) where is the annual operating costs in case of existing combine usage, rubles; is the annual operating costs in case of usage of improved combine, rubles. Operating costs usually include, among others, the wage of personnel ( ( ( ( and energy costs ( ) (fuel, electricity, etc.).…”

Innovative study on pneumatic separation of grain heap and economic feasibility of design versions

“…As a result of conducted studies, the cleaning design with the use of pneumatic and inertia separator of small grain heaps for high-producing harvester-thresher is developed [1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”