Studies on Power Train and Durability of Small Powered Tractors (II)

Life of the First Transmission

Abstract

We investigated the performances of the first transmission belts of small powered tractors and tested the relation between belt life and belt velocity, initial tention, pulley diameter, twisted angle and air temperature. The experimental results were compared by multiple regression analysis. The results were as follows:
1. The first transmission belts of small powered tractors, which farmers used in fields, were damaged after 90-120 hours.
2. Manufacture's specifications for the tensile strength of belt, which showed a large degree of statistical fluctuations in our study, were usually higher than the tested values.
3. The angle of belt twist had a significant effect on belt life, but factors such as velocity, pulley diameter and load had little effect.