- Two Pulleys Of A 450 Mm Diameter And A 250 Mm Diameter Respectively Are On Parallel Shafts With A Distance Of 2 0 P 1 (93.11 KiB) Viewed 23 times
P = 525
Two pulleys of a 450-mm diameter and a 250-mm diameter, respectively, are on parallel shafts with a distance of 2.0 + P/1000 m apart and wrapped by two methods – open belt and cross belt, respectively. For both two wrapping cases, you are required to sketch two belt drives in a graphic paper using proper scales and conduct design analyses to determine: a) the total length of the belt required and the angles of wrap at two pulleys for each case; b) the power can be transmitted by the two belts when the small pulley rotates at 1500 rpm, if the maximum permissible tension in the belt is 2.0 + P/1000 kN, and the coefficient of friction between the belt and the pulley is 0.2. c) the speed of the large pulley when the maximum powers could be transmitted; and d) the differences between two wrapping ways of the belt drive.