Homework Answers
A V- belt drive is to transmit 24 kW of power from a 200 mm pitch...
A V- belt drive is to transmit 24 kW of power from a 200 mm pitch sheave operating at 1500 rpm to a 600 mm diameter sheave. The distance between the input and the output shafts is 800 mm. The grove angle f = 40o and the coefficient of friction between the belt and the sheave is 0.25. The belt to be used weighs 0.9 kg/m and the allowable tension in the belt is 900 N. How many belts are...
A-V belt is to transmit 20 kW from a 250 mm pitch diameter sheave to a...
A-V belt is to transmit 20 kW from a 250 mm pitch diameter sheave to a 900 mm diameter pulley. The center distance between the two shafts is 1000 mm. The groove angle is 40' and the coefficient of friction for the belt and sheave is 0.2 and the coefficient of friction between the belt and flat pulley is 0.2. The cross-section of the belt is 40 mm wide at the top, 20 mm wide at the bottom and 25...
Determine the number of V-belts required to transmit a power of 60 kW at 750 rpm...
Determine the number of V-belts required to transmit a power of 60 kW at 750 rpm from an electric motor to a compressor shaft at 300 rpm. The larger pulley diameter is 1500 mm. The centre distance is 1650 mm, and overload factor is to be taken as 1.5. A belt with cross- sectional area of 350 mm², density of 1000 kg/m and having an allowable tensile strength of 2 MPa is available for use. The coefficient of friction between...
Q2. Written assignment: A flat belt is required to transmit (35 kW) from a pulley of...
Q2. Written assignment: A flat belt is required to transmit (35 kW) from a pulley of (1.5 m) effective diameter running at (320 RPM). The angle of contact is spread over (11/24) of the circumference. The coefficient of friction between the belt and pulley surface is (0.3). Determine, taking centrifugal tension into account, width of the belt required. It is given that the belt thickness is (9.5 mm), density of its material is (1100 kg/m²) and the related permissible working...
Q.9. Arubberised flat belt is moving at 14 m/s with the tension in the tight side...
Q.9. Arubberised flat belt is moving at 14 m/s with the tension in the tight side of 10.0 kN and the slack side of 5.0 kN. The belt is 350 mm wide and 10 mm thick, and it is constructed of 5 plies of 32 oz canvas ducking. What is tension ratio in the belt? A. 2.0 В. 2.1 С. 1.9 D. 2.3 E. none of above (4 Marks) Q.10. A V-belt drive system is to be designed to transmit...
find v belt drive design power select belt type determine shive size (belt speed 4000 ft/min)...
find v belt drive
design power
select belt type
determine shive size (belt speed 4000 ft/min)
find shive size from power rating figure
find rated power
find estimated centre distance
find belt length (by selecting standard belt length)
calculate actual centre distance
find contact angle for small shieve
determine correct factors
calculate correct power per belt
no. of belt needed
V-Belt Designing Sample Problem . Given: A 4 cylinder diesel engine runs at 80 hp, 1800 rpm, to drive a...
Q1 A belt drive and pulley arrangement is designed to transmit 75 kW of power at 1200 rpm, genera...
Q1 A belt drive and pulley arrangement is designed to transmit 75 kW of power at 1200 rpm, generated by a six-pole squirrel-cage induction motor. The belt connects two shafts 3 m apart, with axes in the same horizontal plane. The driven shaft runs at half the angular speed of the driver and it runs a light shock machinery. As a design engineer you need to do the following; i. Design shafts suitable for this application (20 marks) ii. Select...
A single V-belt drive system is powered by an electric motor with a speed of 2691 rpm and transmi...
A single V-belt drive system is powered by an electric motor with a speed of 2691 rpm and transmits a power 11 kW. The driving pulley is connected to the driven pulley by a single V-belt of angle 18 degrees and a unit weight of 2.18 N/m. The angle of wraps between the belt and pulley is approximately 175 degrees. The driven shaft is attached to a cylindrical pulley of 101 mm and runs at a speed of 1221 rpm....
A two stage reduction drive is to be designed to transmit 2 kW; the input speed...
A two stage reduction drive is to be designed to transmit 2 kW; the input speed being 960 r.p.m. and overall reduction ratio being 9. The drive consists of straight tooth spur gears only, the shafts being spaced 200 mm apart, the input and output shafts being co-axial. (a) Draw a layout of a suitable system to meet the above specifications, indicating the speeds of all rotating components. (6) Calculate the module, pitch diameter, number of teeth, blank diameter and...
Q2. Figure Q2 shows a shaft which transmits a power of 48 kW through flat belts. Pulley A is driven by a motor which rotates at 3000 rpm. The diameter of pulley A is 400 mm and that of pulley B is 25...
Q2. Figure Q2 shows a shaft which transmits a power of 48 kW through flat belts. Pulley A is driven by a motor which rotates at 3000 rpm. The diameter of pulley A is 400 mm and that of pulley B is 250 mm. The thickness of the belts is 4 mm and they are made of a material with density of 1100 kg/m3. Assume no sliding between pulleys and belts a) Calculate the speed of the belt and the...
A-V belt is to transmit 20 kW from a 250 mm pitch diameter sheave to a 900 mm diameter pulley. The center distance between the two shafts is 1000 mm. The groove angle is 40' and the coefficient of friction for the belt and sheave is 0.2 and the coefficient of friction between the belt and flat pulley is 0.2. The cross-section of the belt is 40 mm wide at the top, 20 mm wide at the bottom and 25...
Determine the number of V-belts required to transmit a power of 60 kW at 750 rpm from an electric motor to a compressor shaft at 300 rpm. The larger pulley diameter is 1500 mm. The centre distance is 1650 mm, and overload factor is to be taken as 1.5. A belt with cross- sectional area of 350 mm², density of 1000 kg/m and having an allowable tensile strength of 2 MPa is available for use. The coefficient of friction between...
Q2. Written assignment: A flat belt is required to transmit (35 kW) from a pulley of (1.5 m) effective diameter running at (320 RPM). The angle of contact is spread over (11/24) of the circumference. The coefficient of friction between the belt and pulley surface is (0.3). Determine, taking centrifugal tension into account, width of the belt required. It is given that the belt thickness is (9.5 mm), density of its material is (1100 kg/m²) and the related permissible working...
Q.9. Arubberised flat belt is moving at 14 m/s with the tension in the tight side of 10.0 kN and the slack side of 5.0 kN. The belt is 350 mm wide and 10 mm thick, and it is constructed of 5 plies of 32 oz canvas ducking. What is tension ratio in the belt? A. 2.0 В. 2.1 С. 1.9 D. 2.3 E. none of above (4 Marks) Q.10. A V-belt drive system is to be designed to transmit...
find v belt drive
design power
select belt type
determine shive size (belt speed 4000 ft/min)
find shive size from power rating figure
find rated power
find estimated centre distance
find belt length (by selecting standard belt length)
calculate actual centre distance
find contact angle for small shieve
determine correct factors
calculate correct power per belt
no. of belt needed
V-Belt Designing Sample Problem . Given: A 4 cylinder diesel engine runs at 80 hp, 1800 rpm, to drive a...
A two stage reduction drive is to be designed to transmit 2 kW; the input speed being 960 r.p.m. and overall reduction ratio being 9. The drive consists of straight tooth spur gears only, the shafts being spaced 200 mm apart, the input and output shafts being co-axial. (a) Draw a layout of a suitable system to meet the above specifications, indicating the speeds of all rotating components. (6) Calculate the module, pitch diameter, number of teeth, blank diameter and...
Q2. Figure Q2 shows a shaft which transmits a power of 48 kW through flat belts. Pulley A is driven by a motor which rotates at 3000 rpm. The diameter of pulley A is 400 mm and that of pulley B is 250 mm. The thickness of the belts is 4 mm and they are made of a material with density of 1100 kg/m3. Assume no sliding between pulleys and belts a) Calculate the speed of the belt and the...
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