Hitrost polne in prazne vožnje zgibnega traktorja Bijol BWS 160 pri spravilu lesa na visokem krasu

Kržič, Miha (author), Mihelič, Matevž (mentor)

Z raziskavo smo želeli ugotoviti hitrosti vožnje traktorja in razviti model hitrosti vožnje traktorja med spravilom lesa. Podatke smo pridobili s časovno študijo na zgibnem traktorju Bijol BWS 160 v gozdnogospodarski enoti Javornik. Ugotovili smo, da je hitrost vožnje po cesti za 12 % večja kot znaša hitrost vožnje traktorja po vlaki. Pokazali smo, da ima največji vpliv na hitrost vožnje po gozdni vlaki njena blatnost, katero smo ugotavljali v treh različnih kategorijah. Hitrost vožnje se v primerjavi s suho vlako zmanjša za 1,5 km/h na vlažni vlaki in 2,3 km/h na blatni vlaki. Na hitrost vožnje značilno vpliva tudi vzdolžni naklon vlake, kjer smo ugotovili, da je hitrost prazne vožnje na ravnem za 12 % večja kot v kategoriji navzgor in za 22 % večja kot v kategoriji navzdol. Medtem, ko je hitrost polne vožnje na ravnem za 54 % večja kot v kategoriji navzgor in za 0,18 % večja kot v kategoriji navzdol. Na hitrost vožnje značilno vpliva tudi breme. Ugotovili smo, da se hitrost polne vožnje spreminja s količino bremena; s povečanjem bremena za 1 t se hitrost polne vožnje zmanjša za 0,21 km/h. Ugotovili smo, da razviti multivariatni linearni model predstavlja dobro osnovo za ugotavljanje hitrosti traktorja. Vseeno pa v nalogi predlagamo spremljanje dodatnih dejavnikov za izboljšanje pojasnjevalne moči modela.

• Language: Slovenian
• Keywords: traktorsko spravilo, hitrost vožnje, časovna študija
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: BF - Biotechnical Faculty
• Place of publishing: Ljubljana
• Publisher: [M. Kržič]
• Year: 2021
• PID: 20.500.12556/RUL-130849
• UDC: 630*31+630*37:630*58+630*3(043.2)=163.6
• COBISS.SI-ID: 78553603
• Publication date in RUL: 18.09.2021

Secondary language

• Language: English
• Title: Loaded and empty travel speed of Bijol BWS 160 wheeled skidder in skidding on high karst

Abstract

In our research, we tried to determine the driving speed and develop a model of articulated cable skidder driving speed. The data were collected on wheeled cable skidder Bijol BWS 160 in forest management unit Javornik. We concluded that the driving speed on road is 12% higher than driving speeds on skid roads. We have demonstrated that the muddiness has the biggest impact on driving speed on skid roads. The muddiness was identified in three different categories. Average driving speed is 1,5 km/h slower on wet skid road and 2,3 km/h slower on a muddy skid road, compared to a dry skid road. The driving speed is significantly affected by the longitudinal slope of the skid road, where we established that the speed of empty skidder on level ground is 12% higher than in the uphill category and 22% lower when comparing to the downhill category, while driving speed of loaded skidder on level ground is 54% higher than in the uphill category and 0,18% lower than in the downhill category. Driving speed is significantly affected by load. We concluded that the speed of a loaded drive varies according to the amount of load. Increasing the load by 1t reduces the speed of the loaded drive by 0,21 km/h. We concluded that the developed multivariate linear model provides a good basis for determining tractors driving speed. However, we proposed to monitor additional factors to improve the explanatory power of the model.

• Keywords: tractor skidding, driving speed, time study