2. Power is transmitted to a shaft, supported on bearings 36 inches apart, by a belt running on an 18 inch pulley which overhangs the right bearing by 10 inches. Power is transmitted from the shaft by a belt running on a 10 inch pulley located midway between the bearings. The belt drives are at right angles to each other and the belt tensions are 3 to 1 with the total pull on the tight side of either belt being limited to 600 pounds. (a) Draw the moment diagrams. (b) Determine the necessary size of SAE 1045 transmission shafting (ultimate tensile strength 97,000 psi, tensile elastic limit 58,000 psi). Assume K,= 1.5 and K= 1.0. (c) Calculate the torsional deflection in degrees.

2. Power is transmitted to a shaft, supported on bearings 36 inches apart, by a belt running on an 18 inch pulley which overhangs the right bearing by 10 inches. Power is transmitted from the shaft by a belt running on a 10 inch pulley located midway between the bearings. The belt drives are at right angles to each other and the belt tensions are 3 to 1 with the total pull on the tight side of either belt being limited to 600 pounds. (a) Draw the moment diagrams. (b) Determine the necessary size of SAE 1045 transmission shafting (ultimate tensile strength 97,000 psi, tensile elastic limit 58,000 psi). Assume K,= 1.5 and K= 1.0. (c) Calculate the torsional deflection in degrees.

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

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Concept explainers

Power Transmission Elements

It is defined as the energy transfer from one location to another location. The energy will start moving from the energy generation source to the energy applied position to obtain the work output. From this method, a large amount of electric energy moves from the power station to various electrical substations.

Question

2. Power is transmitted to a shaft, supported on bearings 36 inches apart, by a belt running on an 18
inch pulley which overhangs the right bearing by 10 inches. Power is transmitted from the
shaft by a belt running on a 10 inch pulley located midway between the bearings. The belt
drives are at right angles to each other and the belt tensions are 3 to 1 with the total pull on the
tight side of either belt being limited to 600 pounds.
(a) Draw the moment diagrams.
(b) Determine the necessary size of SAE 1045 transmission shafting (ultimate tensile
strength 97,000 psi, tensile elastic limit 58,000 psi). Assume K,= 1.5 and K,= 1.0.
(c) Calculate the torsional deflection in degrees.

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4. A machine shaft turning at 600 rpm is supported on bearings 30" apart. Twenty HP is supplied to the shaft through an 18" pulley located 10" to the right of the right bearing. The power is transmitted from the shaft through an 8" spur gear located 10" to the right of the left bearing. The pulley weighs 200 lb to provide some flywheel effect. The forces acting on the pulley and the gear are given in the diagram. The shaft material selected has an ultimate strength of 70,000 psi and a yield stress of 46,000 psi, determine: Reactions at the bearings b. Bending moment diagrams in the horizontal and vertical directions a. The necessary diameter in accordance with the ASME Code using Kh=1.5 and Kt = 1.0. points) с. Pulley Mt 525 lb Gear 191 lb Mt Forces on Gear 10" 20" 10" 348 lb W-200 lb 116 lb
1. A four stroke internal combustion engine has the following specifications: Brake power = 7.5 kW; Speed 1000 r.p.m.; Indicated mean effective pressure = 0.35 N/mm2;Maximum gas pressure = 3.5 N/mm2; Mechanical efficiency = 80 %. Determine: 1. The dimesions of the cylinder, if the length of stroke is 1.4 times the bore of the cylin- der; 2. Wall thickness of the cylinder, if the hoop stress is 35 MPa; 3. Thickness of the cylinder head and the size of studs when the permissible stresses for the cylinder head and stud materials are 45 MPa and 65 MPa respectively.
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Quick & simple answer
IS. 03 16. The shaft, as shown in Fig. 14.20, is driven by pulley B from an electric motor. Another belt drive from pulley A is running a compressor. The belt tensions for pulley A are 1500 N and 600 N. The ratio of belt tensions for pulley B is 3.5. B. TA2 A D. TA 150 -100- TB2 100 All dimensions in mm. Fig. 14.20 The diameter of pulley A is 150 mm and the diameter of pulley B is 480 mm. The allowable tensile stress for the shaft material is 170 MPa and the allowable shear stress is 85 MPa. Taking torsion and bending factors as 1.25 and 1.75 respectively, find the shaft diameter. Also find out the dimensions for a hollow shaft with outside diameter limited to 30 mm. Compare the weights of the two shafts. Ans. 30 mm : 24 mm: 1.82]
5
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