THE INFLUENCE OF ENVIRONMENTAL CONDITIONS TO JOB INDICA-TORS MID CONDUCTIVITY GRAIN HARVESTERS
Aleksandras Stulginskis University
This paper examines the influence of environmental conditions to mid-conductivity combine harvester straw separation and cleaning grain losses, dam-age, fuel consumption and work efficiency. It was established that the maximum feed rate is limited by grain losses and engine power and working efficiency is limited by environmental conditions. When harvesting grain which is very moist (grain moisture 18.8%), the feed rate should be 4 kg s-1 lower compared with an average moisture content of wheat harvesting. The feed rate is rational when fuel consumption for tone thresh grain is no longer decreasing and grain losses is below allowable limit of 0.5%. There were used 0.75 liters more fuel for tone thresh grain when harvesting moist and lodge wheat compared with an average moisture con-tent of wheat harvesting. To harvest a hectare of summer wheat, when straws are shredded and spread on stubble, used 16.2±0.12 l fuel, and when laying the wind-row used 2.53 l less fuel. Combine harvester cut down 0.46 hectares per hour and thrashed 4.3 tonnes less grain when harvesting moist and lodge wheat compared with an average moisture content of wheat harvesting.
Keyword(s): Grain harvester, grain losses, fuel consumption, efficiency.
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Agricultural Engineering ISSN 1392-1134 / eISSN 2345-0371
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