A turbine transmits 2000 kW at a constant rotational speed of 3000 rpm via a coupling...
A turbine transmits 2000 kW at a constant rotational speed of 3000 rpm via a coupling with 8 bolts on a pitch circle diameter of 520 mm. The maximum shear stress of the bolts is 35 MN/m2. Calculate the diameter of the coupling bolts.
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A turbine transmits 2000 kW at a constant rotational speed of
3000 rpm via a coupling...
(A) a flanged coupling having six bolts placed at pitch circle diameter of 180 mm connects...
(A) a flanged coupling having six bolts placed at pitch circle diameter of 180 mm connects two lengths of steel shafting of same diameter the shaft is required to transmit 80 kw at 240 riv/min assuming allowable intensities of shearing stresses in the shaft an bolts are 75 mn/m2 and 55 mn/m2 respectively and the maximum torque is 1.4 times the mean torque find the diameter of the shaft the diameter of bolts
5 kW of power will be transmitted via a chain-sprocket system. The rotational speed of input...
5 kW of power will be transmitted via a chain-sprocket system. The rotational speed of input shaft is 20 rpm. The required approximate rotational speed of the input shaft is 20 rpm. Required approximate rotational speed for the out shaft is 7 rpm. The approximate distance between center lines of input and output shafts should be 900 mm. This chain-sprocket system is used for an elevator and it is asked to use a single or multiple DIN 8187 chain with...
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...
1. A multiple friction clutch is required to transmit 89.52 kW at 3000 rpm. The plates...
1. A multiple friction clutch is required to transmit 89.52 kW at 3000 rpm. The plates are alternatively of steel and phosphor bronze and they run in oil. The coefficient of friction is 0.08. The internal radius of the friction surface is 0.8 times the radius of the external surface. The axial pressure is limited to 20 x 104 N/m2. If the maximum diameter of the frictional surface is not to exceed 250 mm, determine the number of plates required.
Problem 2: A solid steel shaft ABC of 50 mm diameter is driven at A by...
Problem 2: A solid steel shaft ABC of 50 mm diameter is driven at A by a motor that transmits 50 kW to the shaft at 40 rpm. The gears at B and C drive require 35 and 15 kW, respectively. Calculate the maximum shear stress in the shaft and the angle of twist between A and C. G 80 GPa 10 marks Motor 50 mm
The motor shown in the figure supplies 14.0 kW at 1880 rpm at A. Shafts (1)...
The motor shown in the figure supplies 14.0 kW at 1880 rpm at
A. Shafts (1) and (2) are each solid 26 mm diameter
shafts. Shaft (1) is made of an aluminum alloy [?G=26??GPa], and
shaft (2) is made of bronze [?G=45??GPa]. The shaft lengths are
L1=3.1m and L2=2.7m, respectively. Gear B has 55 teeth,
and gear C has 99 teeth. The bearings shown permit free
rotation of the shafts. Determine:
(a) the maximum shear stress produced in shafts
(1)...
2. Ser A motor with 25 hp at 3000 rpm is connected to a 3 ft...
2. Ser A motor with 25 hp at 3000 rpm is connected to a 3 ft long hollow shaft. The outside diameter is 1" and the wall thickness is 1/8", and the material has an allowable shear stress of 10 ks (35 pts) a) Determine the minimum and maximum shear stress in the shaft b) What is the factor of safety against failure? c) Determine the total angle of twist in the shaft. Bac 3. For the 2D member loaded...
10 pts D Question 4 A steel shaft, d-150 mm in diameter and L-2.47 m long, transmits a constant torque of 389 N-m at 3914 rpm. Assume that the machine it is driving has no rotational inertia, and...
10 pts D Question 4 A steel shaft, d-150 mm in diameter and L-2.47 m long, transmits a constant torque of 389 N-m at 3914 rpm. Assume that the machine it is driving has no rotational inertia, and determine how long it would take the shaft to coast to a stop il its input power were removed. The steel weighs 0.00783 kg/cm 3. The mass of the shaft can be calculated from m-3.14 L d 2 and mass moment of...
Q1: (30 points) A shunt DC generator, running at a constant speed of 1400 rpm, has...
Q1: (30 points) A shunt DC generator, running at a constant speed of 1400 rpm, has a field resistance of 200 22 and armature resistance of 0.5 12. Ignore armature reaction and assume a 400 W rotational loss. a) [15] While supplying no load, the induced armature voltage is 280 V. Calculate the input power. b) [15] When the generator is loaded, the developed power is found to be 4.1 kW at the same magnetic flux of the field found...
You work for a gearbox company and have been charged with helping to design a geared...
You work for a gearbox company and have been charged with helping to design a geared countershaft for a speed reducing gearbox. The gearbox consists of a compound reverted gear train as shown below and is to be designed for an exact 16:1 speed reduction ratio. The input motor provides 10-horsepower which is carried through the gear train and operates at a speed of 2,000 rpm. You are asked to consider spur gears with a 20° pressure angle and 4...
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...
1. A multiple friction clutch is required to transmit 89.52 kW at 3000 rpm. The plates are alternatively of steel and phosphor bronze and they run in oil. The coefficient of friction is 0.08. The internal radius of the friction surface is 0.8 times the radius of the external surface. The axial pressure is limited to 20 x 104 N/m2. If the maximum diameter of the frictional surface is not to exceed 250 mm, determine the number of plates required.
Problem 2: A solid steel shaft ABC of 50 mm diameter is driven at A by a motor that transmits 50 kW to the shaft at 40 rpm. The gears at B and C drive require 35 and 15 kW, respectively. Calculate the maximum shear stress in the shaft and the angle of twist between A and C. G 80 GPa 10 marks Motor 50 mm
The motor shown in the figure supplies 14.0 kW at 1880 rpm at
A. Shafts (1) and (2) are each solid 26 mm diameter
shafts. Shaft (1) is made of an aluminum alloy [?G=26??GPa], and
shaft (2) is made of bronze [?G=45??GPa]. The shaft lengths are
L1=3.1m and L2=2.7m, respectively. Gear B has 55 teeth,
and gear C has 99 teeth. The bearings shown permit free
rotation of the shafts. Determine:
(a) the maximum shear stress produced in shafts
(1)...
2. Ser A motor with 25 hp at 3000 rpm is connected to a 3 ft long hollow shaft. The outside diameter is 1" and the wall thickness is 1/8", and the material has an allowable shear stress of 10 ks (35 pts) a) Determine the minimum and maximum shear stress in the shaft b) What is the factor of safety against failure? c) Determine the total angle of twist in the shaft. Bac 3. For the 2D member loaded...
10 pts D Question 4 A steel shaft, d-150 mm in diameter and L-2.47 m long, transmits a constant torque of 389 N-m at 3914 rpm. Assume that the machine it is driving has no rotational inertia, and determine how long it would take the shaft to coast to a stop il its input power were removed. The steel weighs 0.00783 kg/cm 3. The mass of the shaft can be calculated from m-3.14 L d 2 and mass moment of...
Q1: (30 points) A shunt DC generator, running at a constant speed of 1400 rpm, has a field resistance of 200 22 and armature resistance of 0.5 12. Ignore armature reaction and assume a 400 W rotational loss. a) [15] While supplying no load, the induced armature voltage is 280 V. Calculate the input power. b) [15] When the generator is loaded, the developed power is found to be 4.1 kW at the same magnetic flux of the field found...
You work for a gearbox company and have been charged with helping to design a geared countershaft for a speed reducing gearbox. The gearbox consists of a compound reverted gear train as shown below and is to be designed for an exact 16:1 speed reduction ratio. The input motor provides 10-horsepower which is carried through the gear train and operates at a speed of 2,000 rpm. You are asked to consider spur gears with a 20° pressure angle and 4...
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