3. A motor is connected by a belt to pulley B. T, is the tight-side tensile force equalto 1800 N. The shaft spins at a constant speed, 650 rpm. The power deliveredby the motor is 12.6 kW. On pulley A, connected to the load, the slack side ofthe belt has a tension equal to th of the tight side.bTT,Bd shaftDimensions are as follows:da200 тm 300 тт | 250 тm |180 тm | 250 тm 26 тmdBdahaftaWe analyzed a problem similar to this on Test 01 using static failure theories. Isthis strictly correct? Because the shaft is spinning, would not a material particlesee a time-varying reversal of the the bending stress as in the R.R. rotating beamtest? Would a particle see a reversal of the torsional shear stress?Assume Sut = 370 MPa and Sy = 300 MPa. Ignore Marin factors. Ignore stressconcentrations. Ignore direct shear stress (that due to V). Find the safety factorswith respect to fatigue and yielding. Be guided by section 6-14 on combinedloading.

Answered: Image /qna-images/answer/fead7cd1-9df7-4e61-9369-52a6fb44cb29.jpg

3. A motor is connected by a belt to pulley B. T2 is the tight-side tensile force equal to 1800 N. The shaft spins at a constant speed, 650 rpm. The power delivered by the motor is 12.6 kW. On pulley A, connected to the load, the slack side of the belt has a tension equal to th of the tight side.

3. A motor is connected by a belt to pulley B. T2 is the tight-side tensile force equal to 1800 N. The shaft spins at a constant speed, 650 rpm. The power delivered by the motor is 12.6 kW. On pulley A, connected to the load, the slack side of the belt has a tension equal to th of the tight side.

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 shaft is loaded in bending and torsion such that Ma = 62 N · m, Ta = 48 N · m, Mm = 54 N · m, and Tm = 25 N · m. For the shaft, Su = 700 MPa and Sy = 560 MPa, and a fully corrected endurance limit of Se = 210 MPa is assumed. Let Kf = 2.2 and Kfs = 1.8. With a design factor of 2.0 determine the minimum acceptable diameter of the shaft in mm using the DE-Goodman criterion.
Two shafts, one solid the other one hollow, are connected end to end by meansof a coupling in which there are 8 screws on the pitch diameter D = 250 mm.The solid shaft has diameter d = 50 mm and transfers the power P = 500 kW at 75 rev/s.The external diameter of the hollow shaft is dex = 75 mm.Note: All parts of the system must be equally strong, and able to transfer the requiredpowerCalculate:(a) The internal diameter di of the hollow shaft(b) The diameter of the bolts db connecting the two shafts(c) If the hollow shaft has to be replaced by a rectangular hollow cross-section withouter dimensions b x h and uniform wall thickness of 4 mm.Calculate the values b, h while following the request to keep h = 2b
A V-belt drive transmits 20kW from an electric motor running at 1440rpm to the main shaft of a roving machine. The motor and main shaft pulleys have 300 & 600 rpm respectively. The coefficient of friction between belt and pulley is 0.25. The centre distance between the shafts is 1000mm. The top width, thickness, section angle and density of belt and permissible tension on the belt are 22mm, 14mm and 40deg, 0.97gcm-2 and 600N respectively. How many belts are needed? Calculate the length of a belt needed
An input shaft of a gearbox with motor power P = 7 kW and rotation number n = 1300 rpm. The diameter of an input shaft is d = 20 mm and its material is 16MnCr5. A force of F = 2800 N forces the shaft due to the operation of a gear wheel connected with a wedge on the input shaft. The distances of the gear from the bearings are given as L₁ = 40 mm and L2 = 60 mm. In the most dangerous section, you are required to check the strength according to the S = 3 safety factor. If the section is unsafe in terms of strength, what changes would you make in the design to make it safe? (The surface of the spindle is machined as fine chips, reliability poor Kg = 1.).
Mechanical design A shaft with the following data: 1- The pulley (A) is 1000 mm in diameter and weight 300N. 2- The gear (B) pitch diameter is 600mm and weight -250N. 3- The pulley is keyed to the shaft at 400mm to the left of left hand bearing. 4-the distance between bearing C and B is 1250 mm. 5- The power is 20 kW at 750 rpm. 6- Tension ratio T1 / T2-2.5 7- The shaft d.livers power to a gear placed horizontally in front, the pressure angel of gear is 20. 8- The allowable shear stress is 70N / mm, kt-2 and km- 1.5. Determine: the diameter of shaft
In an open flat belt drive, a pulley of 800 mm diameter runs at 300 r.p.m. The coefficient of friction between the belt and the pulley is 0.25, the angle of lap is 170° and the maximum tension in the belt is 2000 N. The power transmitted is: 10.5 kW 9.4 kW 8.9 kW 7.6 kW None of the mentioned 13.1 kW
A rigid block is supported by two cables having the same diameter of 4 mm. Cable S1 is made of AISI 1050 cold drawn steel with E=200,000 MPa, Sy=580 MPa, and Sult=690 MPa; cable S2 is made of AISI 1020 cold drawn steel with E=200,000 MPa, Sy=390 MPa, and Sult=470 MPa. Determine the maximum number of cycles n3 due to the following history of P.
The disc clutch of an automobile is carried on a 2-inch 6-splined shaft and not to slide under load. The nominal dimensions are as follows: b = 0.25 D; t = 0.075 D and d = 0.85 D. The hub length of 150 % of shaft diameter. Determine the total horsepower transmitted at 3,600 rpm, if the yield strength of the shaft is 1,400 psi
A motor (located at C) provides 50kW of power which is then used by pulleys A and B. When the motor is running, the transmission shaft (which is made of Cr-Ni steel and has a diameter of 5cm) starts rotating at a speed of 200 rpm. 1) Find the moment of force at pulleys A, B and C. 2) Find the torque in each section (between the pulleys). 3) What is the safety factor of the driveshaft on the ultimate limit?
Two pulleys, one 425mm diameter and the other 210mm diameter are one parallel shaft 2m apart and are connected by a crossed flat belt. Find the length of the belt required and the angle of conduct between the belt and each pulley. What power can be transmitted by the belt when the larger pulley rotates at 200 rev/min, if the maximum permissible tension in the belt is 1 kN, and the coefficient of friction between the belt and pulley is 0.3?
Provide a very clear and complete solution as well as diagram. A pulley 600 mm in diameter transmits 40 KW at 500 rpm. The arc of contact between the belt and pulley is 144 degrees, the coefficient of friction between belt and pulley is 0.15 and the safe working stress of the beltis 2.1 Mpa. Determine the belt tension ratio, neglecting the effect of centrifugal force. A. 2.41 B. 2.44 C. 1.458 D. 4.1
As seen in the figure, a construction machine is rotated by a drive mechanism consisting of belt-pulley and spur gear mechanisms. Engine power P = 5.5 kW ; engine shaft speednm = 1500 rpm ; drive pulley diameter Dt = 16 cm ; diameter of the opposite pulley Dk = 55 cm ; number of pinion teeth z1 = 21 ; number of teeth of the counter gearz2 = 60 ; pulley mechanism efficiency ηk = 0.95 ; Since the efficiency of the gear mechanism is ηd = 0.97: a) Find the output shaft speed nç and the torque Mç on this shaft.b) The force on the taut arm of the belt S1 = 450 N;coefficient of friction μ = 0.3 ; If the winding angle α = 160⁰, is the frictionally transmitted moment Ms sufficient to compensate for the Mg moment on the input shaft? Calculate.