230 mm T₂ 71 22770 12 2 772 280 mm TB= 2448 300 mm 30-mm dia. C T 250-mm dia. 400-mm dia. 1800 N A TA = 1530 270 N x Fig. 3 i) Determine the torsional shear stress on shaft AB. ii) Design an appropriate shaft based on DE - ASME Elleptic criterion, with a design factor of 1.5. (Assume the value converges, no further iterations are needed). iii) The shaft runs at 1500 rev/min and the bearings are to have a life of 60 kh at a combined reliability of 0.98. Based on an application factor of 1.5, select the appropriate cylindrical roller bearings needed at locations O and C. Is the statement below correct? Justify your answer "When a machine member is subjected to variable loads, the endurance limit of the member depends upon the surface finish conditions"

230 mm T₂ 71 22770 12 2 772 280 mm TB= 2448 300 mm 30-mm dia. C T 250-mm dia. 400-mm dia. 1800 N A TA = 1530 270 N x Fig. 3 i) Determine the torsional shear stress on shaft AB. ii) Design an appropriate shaft based on DE - ASME Elleptic criterion, with a design factor of 1.5. (Assume the value converges, no further iterations are needed). iii) The shaft runs at 1500 rev/min and the bearings are to have a life of 60 kh at a combined reliability of 0.98. Based on an application factor of 1.5, select the appropriate cylindrical roller bearings needed at locations O and C. Is the statement below correct? Justify your answer "When a machine member is subjected to variable loads, the endurance limit of the member depends upon the surface finish conditions"

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

Please solve step by step both sub parts. shaft transmits 75 kW power at 300 r.p.m. The distance between the two bearing is 3000 mm. It is subjected to torsion only. Calculate the diameter of the shaft, (1)For steady loading and (ii) For suddenly applied load with minor shocks. Take the allowable shear stress for the shaft material as 35 N/mm².
Compute the contact stress number for the gear fain pair driven directly by an electrical motor. The driven machthe is concrete mixture with moderate shock, the other data are given below. Ks= 1.00, Km 1.21, Vt =1527 St/min, Av-11 Pd= 6, np= 1750rp.m, Np 20, No= 70, F=2.00/n Tp = 900ib, Dp= 3:333 in The material used for pioin an gear is Steel
The solid steel rotating shaft in the figure is supported at B and C, and is driven by a gear, not seen, which is linked to spur gear D which has a pitch diameter of 150 mm. The drive gear force F acts at a pressure angle of 20 degrees. The shaft transmits a torque to point A of Ta-350 N.m. The properties of machined steel shaft are Sy-420 MPa and Sut-560MPa. Use a safety factor of 2.5 and determine the minimum allowable diameter in section B and C. Assume sharp felt radii at the bearing shoulders to estimate the stress concentration factors.Explain.
3. Design Challenge: The wind turbine is designed to generate 2.5 MW of power with the blades rotating at 20 RPM. The large gear has 360 teeth and the small gear has 12 teeth. Design the high speed shaft to minimize weight. That is, choose a material (from your textbook) and cross-section dimensions such that the shaft won't yield, with a safety factor of 2.5, while keeping the shaft's weight to a minimum. Calculate the weight per meter of the shaft you designed. 2 Gear reducer High speed shaft Low speed shaft Generator
5. For the engine-transmission-propeller problem shown below, The engine generates a torque of 219lb-ft, and it is bolted to a frame at locations A and B. The transmission reverses the rotation direction. The transmission ratio is 1.5 (i.e. the propeller speed is -1/1.5 the engine speed, the minus sign indicates the change in direction). d. Sketch the free body diagram. Be sure to show the torques at the input and outputs to the different components. Note the change in the rotation direction between the engine and shaft. e. Solve for the reaction forces at the bolt supports of the engine, if the distance between them is 1 ft. Propeller Engine Reduction ratio 1.5 Engine is attached B
Design a rigid flange coupling to transmit a torque of 228N-m between two coaxial shafts. The shaft is made of alloy steel, flanges out of cast iron and bolts out of steel. Four bolts are used to couple the flanges. The shafts are keyed to the flange hub. The permissible stresses are given below: Shear stress on shaft =100MPa Bearing or crushing stress on shaft =250MPa Shear stress on keys =100MPa Bearing stress on keys = 250MPa Shearing stress on cast iron = 200Mpa Shear stress on bolts =100MPa > Provide FBD
u need a table a-9 someone here has that as they answered my question before
In the figure below, a motor with power 150kw and speed of 2500 rpm is connected to shaft 1(by coupling) in a clockwise direction. Shaft 2 is connected to shaft 1 by gears 1 and 2. If 30% of the power is consumed by the gear3 and 9% by the pulley and 61% by the sprocket, draw torque diagrams for both shafts. • Lengths: AB=90mm/BC=GH=50mm/CD3HI=60mm/DE=IJ=80mm 13 Gear3 E Gear2 14 15 16 Motor shafth 2. 17 Bearing Shaft1 Gear1 sprocket
Design a typical rigid flange coupling for connecting a motor and a centrifugal pump shafts. The coupling needs to transmit 15 KW at 1000 rpm. The allowable shear stresses of the shaft, key and bolt materials are 60 MPa, 50 MPa and 25 MPa respectively. The shear modulus of the shaft material may be taken as 84GPa. The angle of twist of the shaft should be limited to 1 degree in 20 times the shaft diameter. Note: show complete solution
es/ EN6902 / General / Final Exam A Wind Turbine has a maximum output of 2MW at a speed of 20 rpm. A shaft of length 2m made of EN8 steel (properties given in the table below) is to transfer torque from the propeller to the turbine. Using a design stress for EN8 Shafting as 240 MPa. You are to: Calculate the diameter size of a solid shaft in mm, so that it will not fail due to torsion. EN8 Shafting Steel Ultimate tensile stress 850 MPa Ultimate shear stress 490 MPa Tensile Yield stress 530 MPa Shear Yield stress 300 MPa Young's miodulus Modulus of rigidity 210 Gpa 78 GPa Select one: O a. 270 O b. 136 O c. 135 O d. 272 SW
None
Ex: The second shaft on a parallel-shaft 25-hp foundry crane speed reducer contains a helical gear with a pitch diameter of 8.08 in. Helical gears transmit components of force in the tangential, radial, and axial directions. The components of the gear force transmitted to the second shaft are shown in Fig. (8) at point A. The bearing reactions at C and D, assuming simple- supports, are also shown. A ball bearing is to be selected for location C to 262 accept the thrust, and a cylindrical roller bearing is to be utilized at location D. The life goal of the speed reducer is 10 kh, with a reliability factor for the ensemble of all four bearings (both shafts) to equal1 (90% reliability) with light to moderate impact. (a) Select the roller bearing for location D. (b) Select the ball bearing (angular contact) for location C, assuming the inner ring rotates. 356.6 144 297.5 3 in 2915 4.04 in 106.6 595 144 250 Fig.(8) Table(1) Bearing Characteristics That May Influence the Selection of Bearing…