The following data refer to an open belt drive with a flat belt.
Diameter of larger pulley = 400 mm
Diameter of smaller pulley = 250 mm
Distance between the centres of the two pulleys = 2 m
Coefficient of friction between each pulley and belt = 0.4
Maximum tension when the belt is on the point of slipping = 1200 N
Answer the following questions:
i) What is the power that can be transmitted at speed of 10 m.s-1 of the belt under the given conditions?
ii) What is the initial tension of the belt? Given that Initial tension, T0 = (Tt1 + Tt2)/2
iii) Which of the following two methods do you select if the power transmitted to be increased? Find the percentage of change of power transmission in each metnod.
a) By increasing the initial tension of the belt by 10%, while other parameters being remain unchanged.
b) By increasing the coefficient of friction by 10% between the smaller pulley and the belt by the application of suitable dressing on the belt, while other parameters being remain unchanged
