Fig Q1 shows a two-stage spur gearbox. The input shaft is coupled to a motor. The shaft "b" turns freely inbearings C and D, except for the gear-tooth forces. Assuming 100% gear efficiency, determine the resultantradial loads applied to bearings C and D, and sketch the shaft "b" as a free body in equilibrium. m = 5 mmØ= 20°30INPUTс6022 TEETHSHAFT"b"66 TEETH40D24 TEETH18 TEETH IDLER84 TEETHOUTPUT1 kW200 rpmFig Q1: Two-stage spur gearbox.VIEW FROM A

Output :Given that ; P=1 kW = 1000 W N= 200 rpm Number of teeth…

Answered: Fig Q1 shows a two-stage spur gearbox.…

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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For the Finishing Mill of a hot strip mill, the input shaft of several different gearboxes are each driven by a DC motor of 10,500 HP operating at 125 RPM. For your ASSIGNED gearbox only, you are required to analyze the gearbox capabilities by doing thefollowing: 1. Calculate the maximum motor torque2. calculate the force transmitted by the gearing.3. Using statics, calculate the equivalent radial load at the bearings for BOTH the pinion shaft and the gear shaft. (Four bearings total; two per shaft). Include FBDs of the shafts.4. Research the load capacities for the bearings.(Hint: the bearing manufacturer is most likely Timken / Torrington).5. Calculate the expected bearing life for each bearing.6. Calculate the safety factor for both the bending strength and the pitting resistance for the pinion shaft AND the gear shaft gear teeth based on the transmitted load and the gear material(s).7. Draw the shear, bending moment, and torque diagrams for the GEAR SHAFT ONLY.8. Calculate the…
The larger diameter and face of the disk of a multiple disk chutch are 225 mm and 20 mm respectively. The load applied to the spring of the clutch axially is 1500 N. Assuming that there are 8 pairs of friction 0.18 and tuning 800 rpm. Find the power transmitted by the clutch using uniform pressure method. (Ans, 13.67 kW)
Draw free-body diagrams of the two gears, assuming an input couple M on theOUT X shaft of the larger gear in the direction shown. Include forces at bearings A, B, D and E. M isthe reaction couple at the output shaft - i.e. the resistance to turning of the object being driven.The gears have 48 and 24 teeth respectively. If the input gear (large gear) turns at 100 rpm(= revolutions per minute), the output speed (small gear) is _______rpm.Wil OUT X IN Xl M be larger or smaller than M ?
The following figure shows a cable lifting system, the lifting system is derived by an electric motor through a V-belt and spur gear that is coupled with the drum. Replace the V-belt drive with one step of helical gears if the input power is 40hp. Specify the design whether is satisfactory or not. Electrical motor n, 870 r.p.m- small sheave speed v-belt Drum radius = 40 cm Pinion Gear non, 200 r.p.m pinion and biggest sheave speed ne=100 r.p.m cable Crate weight = 800 kg
Photo by Norbert Schnitzler, CC BY-SA 2.0 simple model 36 in bearing bearing fixed support A simplified model of two solid circular shafts connected by two rigid gears is given below. Determine: (1) the torque in shaft c-d to the nearest in-lb and (2) the angle of twist at point a in degrees with two decimal places. b bearing bearing a 62 in Notes: top view (sketch not to scale) - gear b radius= 1.25 in - gear c radius = 4.60 in - shaft ab radius = 1.00 in -shaft cd radius = 0.75 in - shear modulus = 12000 ksi 1100 in-lb
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. If the pressure angle of the gears is 20 degrees to the x-axis, Calculate the reaction forces of the bearings and draw the bending moment diagrams for both shafts according to the information below: Lengths: AB=90mm/BC=DGH=50mm/CD=HI=60mm/DE=IJ=80mm Diameters: dG1=dG2=47mm/ dG3=20mm/ d(pulley)=35mm/d(sprocket)=40mm Gears Gear2 Tew) shaftz Bearing Shaft Gear1 SProcket
Clutch break and gear Solve it by proper solution
The following drive system is used to raise a load at constant velocity. The motor rotational speed is 1000 rpm, and the rotational speed of the drum is 200 rpm. The efficiency of the gear box is 0.85. The efficiency of the drum is 0.95%. The moment of inertia of the motor (input shaft) is 0.5 kg.m², and the moment of inertia of the drum (output shaft) is 0.75 kg.m². Calculate: (1) The total (equivalent) moment of inertia of the drive system referred to the motor shaft. (2) The developed mechanical power on the motor Drum, 0.5 m diameter shaft. 1000 Kg Motor Gearbox
Ex: The second shaft on a parallel-shaft 25-hp foundry crane speed reducer contains a helical gear with a pitch diameter of S.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 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 equal 1 (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. *- 20 Fig (8)
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A belt conveyor transports 18 tonnes per hr at 20°. Determine the unit weight of belt material in kg/ply-cm width-m to lift the load vertically up sufficient to give 33.5 m horizontal center-to-center pulley distance. 1750-rpm motor, V-belt drive to helical gear speed reducer. Belt speed, 61 m/min. Discharge over tail pulley. No tripper.
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…

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