|
|
Technicko-ekonomické parametry harvestorového uzlu s mobilním trakčním navijákem
Černý, Lukáš
The dissertation explores the work with harvester technology with a mobile traction winch in sloping terrains. It deals with the efficiency of these machines in their technological varieties. A time measurement study was undertaken in the dissertation which studied the work of a harvester with a mobile traction winch and without a mobile traction winch during the toll logging of a centennial spruce stand. The time study was performed in eastern Slovakia to establish the differences in time consumption during the work cycles. Some minor differences had been detected during work tasks, however, these did not exhibit any effect on the mobile traction winch in the work cycles of logging one tree. Furthermore, the time study measured the effect on any changes in work productivity, which is required during the operation of the mobile traction winch. Besides the harvester, a time study of a forwarder with a mobile traction winch has been compiled. To establish the effect on the forrest environment of the harvester technology and the mobile traction winch, an evalution of damage to the soil in two technological varieties was performed in Slovakia and the Czech republic. The technological variety with a mobile traction winch was less damaging to the soil surface due to the prevention of wheel slipping destpite the fact that the overall results of soil damage were negative. An operating cost analysis has been worked out to complete the study, which has shown the technological variety with the mobile traction winch to be more costly due to the purchase price of the winch and the higher fuel consumption. The main advantage, however, is safety, not cost savings.
|
guest ::
