Original scientific paper
Comparison of Slips and Pulling Forces on Worn and New Tyres
Bogomir MURŠEC
; University of Maribor, Faculty of Agriculture and Life Sciences, Hoce, Slovenia
Jurij RAKUN
; University of Maribor, Faculty of Agriculture and Life Sciences, Hoce, Slovenia
Abstract
The slip, the resistance to rolling and pulling force are interconnected. The
influence of tyre wear on the tractor pulling force and slip on three different grounds was observed. The tangential force was measured by dynamometers fixed to tractor driving half-axle. The pulling force on the pulling rods was measured by dynamometer fixed to the pulling force. The tractor was braked under control by the vehicle in which the measuring instruments were placed. The slip was measured by means of the fifth wheel. The measurements were carried out on the AGT 835 T tractor with diagonal tyres of Ruma Guma make 7.5 – 16. The tyre
wear amounted to 46.7 %. In the case of tyre wear the differences are rather small or even do not occur. When using new tyres a 3 to 5 % smaller slip was observed during plowing. On the asphalt greater tangential force was observed when using worn tyres. On the grassland where maximum pulling forces were observed there were no differences between worn and new tyres.
Keywords
Pulling force; Resistance to rolling; Slip; Tractor; Tyre wear
Hrčak ID:
64424
URI
Publication date:
30.6.2010.
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