For the mechanical design shown in the figure below, the motor drives the shaft 1 by means of flat belt drive and the power transmitted to the shaft 2 by muff coupling. The information of the parts detailed as below: For belt drive: Diameter of the driver pulley =500 mm, speed of the driver pulley=750 rpm • Diameter of the driven pulley= 1800 mm, maximum tension in the belt=3000 N • Same materials of the two pulleys, the coefficient of friction between the belt and the pulley is 0.35 • Distance between centers of two pulleys= 3 m. For coupling Shear stress and the crushing stress of the key and the shaft material is 45 MPa and 83 MPa respectively. Also, Shear stress for the muff material is 18 MPa 1) Find the power transmitted by the belt? 2) Design the neat coupling between two shafts? Driven pulley Muff coupling Driver pulley

A belt drive operates with sheave sizes of 5.25 in and 13.95 in. If the center distance (C) is specified at 24 in, what is the theoretical belt length required? (A) 61.35 in (B) 70.25 in 78.93 in (C) (D) (E) 84.12 in 89.02 in

An electric motor running at 970rpm is used to drive a rock crushing machine with a design power of 32 kW. A 33oz ducking weight flat belt drive is proposed with a tension ratio of R = 4 and belt width b = 120 mm. The pitch diameter of the driving pulley (on the motor-end) is 320mm. a) What is the mass per mm width per m length per ply in kg/mm/m/ply? Number (exact value) b) What is the maximum working tension per mm width per ply in N/mm/ply? Number (exact value) c) Calculate the belt velocity in m/s Number (+/-1%) d) Determine the number of belt plies required. Your answer should be an integer number (no decimals). Number (exact value)

A 2:1 speed reduction drive (Fig Q4) between two parallel shafts at 1200 mm centre distance is being provided by a V-belt of mass 0.5 kg/m. The diameter of the driving pulley is 200 mm and the driving shaft rotates at 900 rev/min. The driven pulley is 400 mm diameter. The angle of the pulley grooves is 40°, and the coefficient of friction between belt and pulleys is 0.35. If the maximum beit tension is 400 N determine: (i) The linear belt speed and the centripetal tension due to that belt speed. (ii) The angle of lap on each pulley (iii) The maximum power that may be transmitted Ø200 1200 Ø400