(b) Belt drive system using a flat belt with a cross-section of 500 mm² and density of the flat belt is 1300 kg/m³. The angle of lap is 165° on the smaller wheel. The coefficient of friction is 0.35 and the maximum force allowed in the belt is 600 N. When the belt runs at 10 m/s, calculate: (i) centrifugal force exerted in the belt drive system, (ii) power transmitted, (iii) initial tension in the belt. (iv) if flat in belt is replaced with V belt with 30° groove angle, calculate the power transmitted by the V belt.

(b) Belt drive system using a flat belt with a cross-section of 500 mm² and density of the flat belt is 1300 kg/m³. The angle of lap is 165° on the smaller wheel. The coefficient of friction is 0.35 and the maximum force allowed in the belt is 600 N. When the belt runs at 10 m/s, calculate: (i) centrifugal force exerted in the belt drive system, (ii) power transmitted, (iii) initial tension in the belt. (iv) if flat in belt is replaced with V belt with 30° groove angle, calculate the power transmitted by the V belt.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A pulley system uses a flat belt of cross sectional area 500 mm2 and density 1300 kg/m3. The angle of lap is 165O on the smaller wheel. The coefficient of friction is 0.35. The maximum force allowed in the belt is 600 N. If the the diameter of the smaller wheel is 50 cm and rotates at 3850 rpm , determine Initial tension in the belts and Power transmitted.
What thrust is obtained from a propeller 3 m in diameter that has the characteristics given in Fig. 14.2 when the propeller is operated at an angular speed of 1400 rpm and an advance velocity of zero? Assume p = 1.05 kg m3.
Two parallel shafts whose centre lines are ‘5’ m apart, are connected by an open belt drive. The diameter of the larger pulley is ‘3’ m and that of smaller pulley ‘3’ m. The initial tension in the belt when stationary is ‘4’ kN. The coefficient of friction between the belt and the pulley is 0.3. Calculate the power transmitted, when the smaller pulley rotates at ‘700’ r.p.m. and length of the belt.
The average wind speed in a proposed wind farm with a horizontal axis wind turbine (HEWT) is 16.2 m/s. The power coefficient of each wind turbine is estimated at 0.462, and the combined efficiency of the gearbox and generator is 86.2%. When the wind velocity at a speed of 16.2 m/s, calculate the required diameter of the wind turbine (impeller or rotor) for each turbine, as it should produce 2.62 MW of electrical power from each turbine. Find the mass flow rate of the air passing over the wind turbine. Take the density of air 1.162 kg/m3. Since 30 turbines installed in the wind farm and a house in the area have an average electrical power consumption of about 1.62 kW, Calculate how many houses of the power requirement. that can be met? For calculation, take into account an additional efficiency of 96.2% for power transmission losses. Solve the problem by making the necessary assumptions and drawing the schematic figure.
Two identical pulleys with diameter of 711 mm, are mounted on two parallel shafts for flat belt drive system. The maximum permissible tension in the belt is 2,691 N and the coefficient of friction between belt and pulley is 0.31. The centrifugal tension acting on the belt is 887 N. Calculate the power that can be transferred in Watts if the rotational speed of the driving pulley is 978 r.p.m.
Consider an automobile with a mass of 5500 lbm braking to a stop from a speed of 55 miles/h.(a) How much energy (Btu) is dissipated as heat by the friction of the braking process?(b) Suppose that throughout the United States, 300,000,000 such braking processes occur in the course of a given day. Calculate the average rate (megawatts) at which energy is being dissipated by the resulting friction.(c) Find a source of information on the average per-capita consumption of electricity (kW) in the United States, France, and India. Roughly how many people in each country would have their electricity needs met if the braking energy calculated in Part (b) could be recovered and used to provide electricity? Show your calculations and identify your information source.
Consider the impeller of a centrifugal pump with a rotational speed of 900 rpm and a flow rate of 95 kg/min. The impeller radii at the inlet and outlet are 7 cm and 16 cm, respectively. Assuming that the tangential fluid velocity is equal to the blade angular velocity both at the inlet and the exit, the power requirement of the pump is (a) 83 W (b) 291 W (c) 409 W (d) 756 W (e) 1125 W
What thrust is obtained from a propeller 3 m in diameter that has the characteristics given in the figure shown in the image below when the propeller is operated at an angular speed of 1400 rpm and an advance velocity of zero? Assume p = 1.05 kg m3.
..Consider a leather belt with the following given: width of 100 mm, thickness of 6.4 mm, velocity of 18.3 m/s. Which of the following is the centrifugal force across the belt? Note that the density of belt is approximately 974 kg/m3Group of answer choices 205 N 309 N 209 N 305 N
If there is no friction between shaft AB and the collar, what angular velocity Ö must the mechanism have to keep the collar at r= 660 mm from the vertical axis? Consider the same mechanism again, with m = 3.3 kg, d = 275 mm, k = 180 N/m, only now, instead of being smooth, the collar and shaft have a maximumcoefficient of friction of 0.74. What is the minimum angular velocity required to keep the collar at a constant distance r= 660 mm from the axis of rotation?
Determine ratio of friction energy to total energy
A 3-bladed wind turbine with 250 kW generator has diameter of 50 m and tower height of 60 m. It is designed to have Cp of 0.25 at wind speed of 12 m/s when regulation starts. The cut-in and furling Speeds for the machine are 5 m/s and 20 m/s respectively. Mechanical and electrical efficiencies are 90 % and 95 %. By assuming the density of air as 1.225 kg/m3. Calculatea. What is power developed by the rotor at 12 m/s when regulation starts? b. If the tip-speed ratio at this wind speed is 4.2, then what is the rpm of the rotor? c. Calculate the actual torque developed. d. Calculate the maximum possible annual power output.