Uticaj sastojinsko-terenskih karakteristika na efikasnost rada traktora Timberjack 240b u čistim sastojinama bukve

Abstract

U radu su prikazani rezultati istraživanja efikasnosti rada traktora Timberjack 240b sa dvodobošnim vitlom (u formi rada 1T+0P) u prebirnoj sastojini bukve na prosječnoj nadmorskoj visini od 983.73 m. Istraživanje je sprovedeno studijom vremena i rada, koristeći u određenim segmentima istraživanja GIS tehnologiju. Ostvareno radno vrijeme pripada 75.44% efektivnom vremenu i 24.56% dodatnom vremenu. Faktor dodatnog vremena iznosi 1.33. Srednja transportna distanca iznosila je 221.19 m, pri čemu je ostvareno 47 transportnih ciklusa sa 66 stajnih tačaka, prosječno 1,41 po transportnom ciklusu. Pomoću 79 zahvata vitlom privučeno je 363 komada, odnosno 204.04 m3 drveta. Prosječna zapremina tovara iznosi 4.34 m3, a prosječan broj komada po turi 5.43. Na vrijeme kretanja (ne)opterećenog traktora po vlaci utvrđen je značajan uticaj transportne distance i zapremine tovara u interakciji sa uzdužnim nagibom vlake. Shodno utvrđenom značajnom uticaju nagiba vlaka na vrijeme kretanja opterećenog traktora po vlaci, vlake je potrebno graditi pod što manjim vrijednostima nagiba radi uvećanja produktivnosti traktora. Po mogućnosti privlačenje drvnih sortimenata treba obavljati niz nagib.

This paper presents the results of research of the Timberjack 240b tractor equipped with a double-drum winch (work form 1 Tractor driver + 0 Assistant) in beech stand at an average elevation of 983.73 m. The research was conducted using the time and work study method, with the help of GIS technology in certain segments of research. The achieved working hours consist of 75.44% effective time and 24.56% delay time. The delay time coefficient is 1.33. In total, 47 transport cycles were realized, with 66 stopping points, an average of 1.41 per transport cycle. The average skidding distance was 221.19 m. In total, 363 logs (204.04 m3) were collected by 79 winches. The average load volume was 4.34 m3 and consisted of 5.43 pieces. Loaded tractor skidding time is strongly influenced by skidding distance and load volume in interaction with the longitudinal slope of skidding trails. To increase tractor productivity, it was concluded that the skidding roads should be built with the smallest longitudinal slope possible. Preferably, logs should be skidded downhill.