Abstract
The problem of increasing the durability of V-belt transmissions of mechanical presses is considered in the paper. The issue of determining the factors that influence durability and ways of its improvement is set. Based on fatigue strength provisions it was found that transmission durability is determined primarily by the largest stress value in transmission sides and the number of belt runs. The major way of increasing the durability is ensuring the minimum initial tension, sufficient for design load transmission, and its systematic control. Durability of belts is improved by increasing transmission ratio, reducing the number of runs, increasing spacing on centers. Durability of drive as a whole is determined by reliability of separate belts, their quantity and condition of drive failure as a system. Increasing the number of transmission belts improves durability of transmission as a whole only with the use of hot standby. The research results can be used in designing belt transmissions of other technological and transport machines for increasing their performance standards.
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