Analysis of the PTO load of a 75 kW agricultural tractor during rotary tillage and baler operation in Korean upland fields

摘要: Abstract In this paper, the PTO severeness of an agricultural tractor during rotary tillage and baler operation was analyzed. The S–N curves driving gears were obtained through fatigue life test. To obtain gears, breakage time rotational speed measured observation bending stress with changing torque. torque acting on analyzed operation. Rotary conducted at two ground speeds upland field sites similar soil conditions, respectively. load data inverted to a spectrum using rain-flow counting SWT equations. Modified Miner’s rule used calculate partial damage sum. defined as relative ratio results showed that increased when or increased. effect more significant than speed. greater