An analytical calculation of the power rating of v-belt

Abstract

In the current context of the International Standards, there is not enough information to face the analytical calculation of the power rating of V-belts. It's practical habitual to use power rating diagrams or tables offered by belt manufacturers with limitation to implement computational procedures, and for calculating ratings which are out of the range of speed or diameter conditions shown in the power rating diagrams or tables. For such a reason, this article presents some useful results and detailed formulae based in ISO Standard 5292 for power ratings, together with appropriate correction terms and analytical factors used in the calculation of power rating of V-belts. Formulae and analytical factors are generally acceptable for the study and design of V-belt transmissions with two pulleys. Moreover, some results of optimal values of belt velocity for maximum power capacity are presented. Results presented in this paper were the bases for an informative proposal annexed to the Cuban Standard NC-ISO 5292:2009 referred to the analytical calculation of power ratings in belt transmissions.