SHIGLEY'S MECH.ENGIN....(LOOSE)>CUSTOM<
10th Edition
ISBN: 9781260163155
Author: BUDYNAS
Publisher: MCG CUSTOM
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Chapter 17, Problem 16P
To determine
The belt, pulley sizes, and initial tension at installation..
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A belt conveyor transports 18 tonnes per hr at 20°. Determine the speed reducer power factor to lift the load vertically up sufficient to give 33.5 m horizontal center-to-center pulley distance. 1750-rpm motor, plain chain drive to helical gear speed reducer. Belt speed, 61 m/min. Discharge over tail pulley. No tripper.
A plate clutch has 3 discs on the driving shaft and 2 discs on the driven shaft, providing four pairs of contact surfaces. The outside diameter of the contact surfaces is 240 mm and inside diameter 120 mm. Assuming uniform pressure and coeff. Of friction is 0.3. Find the total spring load pressing the plates together to transmit 23kw power at 1475 revolution per minute. If there 6 springs each of stiffness 13 kN/m and each of the contact surfaces has worn away by 1.25 mm. find the maximum power that can be transmitted assuming uniform wear. A plate clutch has 3 discs on the driving shaft and 2 discs on the driven shaft, providing four pairs of contact surfaces. The outside diameter of the contact surfaces is 240 mm and inside diameter 120 mm. Assuming uniform pressure and coeff. Of friction is 0.3. Find the total spring load pressing the plates together to transmit 23kw power at 1475 revolution per minute. If there 6 springs each of stiffness 13 kN/m and each of the contact surfaces…
A 6-in-wide polyamide F-1 flat belt is used to connect a 4-in-diameter pulley to drive a larger pulley with an angular velocity ratio of 3. The center-to-center distance is 8 ft. The angular speed of the small pulley is 1850 rev/min as it delivers 2 hp. The service is such that a service factor Ks of 1.25 is appropriate.
(a) Find Fc, Fi, F1a, and F2.
(b) Find Ha, nfs, and belt length.
(c) Find the dip.
Chapter 17 Solutions
SHIGLEY'S MECH.ENGIN....(LOOSE)>CUSTOM<
Ch. 17 - Example 17-2 resulted in selection of a 10-in-wide...Ch. 17 - A 6-in-widc polyamide F-l flat belt is used to...Ch. 17 - Prob. 3PCh. 17 - A flat-belt drive is to consist of two...Ch. 17 - In solving problems and examining examples, you...Ch. 17 - Return to Ex. 17-1 and complete the following. (a)...Ch. 17 - Prob. 7PCh. 17 - Prob. 8PCh. 17 - Prob. 9PCh. 17 - Two shafts 20 ft apart, with axes in the same...
Ch. 17 - Prob. 11PCh. 17 - Prob. 12PCh. 17 - A designer has to select a metal-belt drive to...Ch. 17 - Prob. 14PCh. 17 - Prob. 15PCh. 17 - Prob. 16PCh. 17 - Prob. 17PCh. 17 - Two B85 V belts are used in a drive composed of a...Ch. 17 - Prob. 19PCh. 17 - Prob. 20PCh. 17 - The geometric implications of a V-flat drive are...Ch. 17 - A 2-hp electric motor running at 1720 rev/min is...Ch. 17 - The standard roller-chain number indicates the...Ch. 17 - Prob. 24PCh. 17 - A double-strand no. 60 roller chain is used to...Ch. 17 - A four-strand no. 40 roller chain transmits power...Ch. 17 - Prob. 27PCh. 17 - Prob. 28PCh. 17 - Prob. 29PCh. 17 - Prob. 30PCh. 17 - Prob. 31PCh. 17 - Prob. 32PCh. 17 - Prob. 33PCh. 17 - For Prob. 17-29 estimate the elongation of the...
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- In a particular application, the radial load acting on a ball bearing is 5 kN and the expected life for 90% of the hearings is 8000 Calculate the dynamic load carrying capacity of the bearing, when the shaft rotates at 1450 rpm.arrow_forwardA single plate friction clutch with both sides of plate being effective is used to transmit power at an engine speed of 200rpm. It has outer and inner radii 10cm and 8cm respectively. Find maximum power transmitted and the corresponding axial thrust, if the maximum intensity of pressure is not to exceed 0.08N/mm2 . Assume coefficient of friction as 0.25.arrow_forwardA link in a mechanism is to be subjected to a tensile force that varies from 3500 to 500 N in acyclical fashion as the mechanism runs. It has been decided to use AISI 1040 cold-drawn steel.Complete the design of the link, specifying a suitable cross-sectional shape and dimensions.5. Specify the required length of no. 60 chain to mount on sprockets having 15 and 50 teeth with acenter distance of no more than 36 in.arrow_forward
- A Self-aligning medium series bearing for bores of 85 mm is operating at 300 r.p.m for an average life of 9 years at 10 hours per day, is acted by a 15 kN radial load and 10 kN thrust load. The bearing is subjected to a light shock load and the inner ring is sationary. Determine the suitable self-aligning bearing. Mention the advantage of using self align bearing.arrow_forwardThe shaft of a belt drive is made of AISI C1020 as rolled steel. The belt tensions vary continuously during transmission at a constant tension ratio of 3:1; the maximum tight side tension being 400 lb and the minimum tight side tension is expected to be 160 lb, at a pulley diameter of 12 inches. For a Goodman factor of safety of 1.8, recommend the diameter of the shaft. Consider a machined surface and the effect of a hardened profile keyway in the shaft.arrow_forwardA 1" diameter line shaft, which is supported by frictionless pulleys at the ends, carries 2 pulleys. The 10" diameter driver pulley is driven in a counter-clockwise direction, and its belt tensions are 25 lbs and 56 lbs. The 2" diameter driven pulley has one of its belt tensions measured at 30 lbs. Calculate the missing belt tension.arrow_forward
- 5. Design a sleeve coupling for the transmission of 12 kW at 300 rpm by two connected steel shafts. Take service factor KS 1.25. The sleeve is made of CI. The key and the shaft are made of the same material. Allowable stress: Shear stresses in key and shaft 50 MPa Crushing stress in key= 100 MPa Shear stress in CI sleeve = 10 MPaarrow_forwardOuter and Inner diameter of a thrust bearing are 320 mm and 200 mm respectively . Axial load is 80 kN and pressure is 350 kN / m² . The number of collars required isarrow_forward6. Design a clamp coupling for transmitting 36 kW, at 200 rpm. Allowable shear stress in shaft is 45 MPa, allowable shear stress in key is 40 MPa, and allowable crushing stress in key is 90 MPa. The number of bolts joining the two halves is 4. The permissible tensile stress in bolts is 60 MPa. The coefficient of friction between the muff and shaft can be taken as 0.25arrow_forward
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