A flat belt makes contact with an 16 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45, and a torque of 300 ft-lbs is to be transmitted, calculate the belt tensions.
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- Solve Sample Problem 7.16 if the contact pressure under the polisher varies parabolically from p0 at r=0 to zero at r=R; that is, p=p0(1r2/R2).4.) A flat belt makes contact with an 18 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45, and a torque of 350 ft-lbs is to be transmitted, calculate the belt tensions.4.) A flat belt makes contact with an 16 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45 , and a torque of300ft−bsis to be transmitted, calculate the belt tensions. (please type answer not write by hend)
- A multiple V-belt drive is required to transmit 4 kW. The smaller pulley of the system is150 mm diameter, rotates at 200 rev/min, and has an angle of lap angle of 135°. Thegrove angle is 40° and the coefficient of friction between the belt and the pulleys is 0·3.If the maximum tension in any one belt is limited to 800 N, calculate:(a) The number of belts required. (b) The minimum tension in any one belt. (c) The required pre-tensioning of the belt. The centre-to-centre distance between the pulleys is 2 m.(d) Determine to the nearest mm, the required size for the larger pulley.(e) Find the approximate length of the beltTwo 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.A drum requires a torque of 200 N.m. to get it to start rotating. The static of friction between the belt and the drum is 0.35. 1. Compute the value of T2 to cause impending slippage between belt and drum. 2. Compute the value of T1 to cause impending slippage between belt and drum. 3. Compute the minimum axial force at A on the drum required to create enough tension in the belt to start the rotation of the drum.
- An open belt connects two flat pulleys. The pulley diameters are 300 mm and 450 mm and the corresponding angles of lap is 160°. The smaller pulley runs at 200 r.p.m. the pulley are kept at a distance of 3500 mm. The coefficient of friction between the belt and pulley is 0.25. It is found that the belt transmits 3 kW . Calculate the tensions in tight and slack side and the length of the belt.2. A square threaded screw of mean diameter 25 mm and pitch of thread 6 mm is utilised to lift a weight of 10 kN by a horizontal force applied at the circumference of the screw. Find the magnitude of the [Ans. 966 N] force if the coefficient of friction between the nut and screw is 0.02. A bolt with a squore threaded screw has mean diameter of 25 mm and a nitch of 23 mm It carries anIn a thrust bearing the external and the intermal diameters of the contacting surfaces are 320 mm and 200 mm respectively. The totail axial load is 80 kN and the intensity of pressure is 350 kN/m. The shaft rotates at 400 rpm. Taking the coefficient of friction as 0.06, calculate the power lost in overcoming the friction, Also, find the mumber of collars required for the bearing
- A cone clutch has cone elements at an angle of 12o. The clutch transmit 25 HP at a speed of 1200 rpm. The mean diameter of the conical friction section is 16 in and the coefficient of friction is 0.35. Find the axial force needed to engage the clutch.HW5 The tension in a pulley belt is 30 N when stationary. Calculate the tension in each side and the power transmitted when the belt is on the point of slipping on the smaller wheel, the wheel is 300 mm diameter and the coefficient of friction is 0.4. The angle of lap is 160°. The wheel speed is 1420 rev/Min.Plz attempt if you know the answer otherwise skip to another expert. A flat belt is required to transmit 30 kW from a pulley of 1.5 m effective diameter running at 300 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 in to account, width of the belt required. It is given that the belt thickness is 9.5 mm, density of belt material is 100 kg / (m ^ 3) and the permissible working stress is 2.5 MPa.