Chapter 4, Problem 73P

A shaft have three eccentrics, each 75 mm diameter and 25 mm thick, machined in one piece with the shaft. The central planes of the eccentric are 60 mm apart. The distance of the centers from the axis of rotation are 12 mm, 18 mm and 12 mm and their angular positions are 120° apart. The density of metal is 7000 kg/m³. Find the amount of out-of-balance force and couple at 600 rpm. If the shaft is balanced by adding two masses at a radius 75 mm and at distances of 100 mm from the central plane of the middle eccentric, find the amount of the masses and their angular positions.

Solve correctly! Use image down below and pay attention to the numbers that it’s using UNITS SHOULD BE (m/sec) use the correct units!!!

Please show the complete solution. Write the given values and constant value (if there is). Write eligibly. Thank you.

Problem 8 The figure represents two integral gears subjected to the tooth-contact forces shown. Replace the two forces by an equivalent single force R at the rotation axis O and a corresponding couple M. Specify the magnitudes of R and M. If the gears were to star t from rest under the action of the tooth loads shown, in what direction would rotation take place? 1.5 kN 20° 20° 2.4 kN 200 mmg 120 mm y

-8 Q2: A shaft is driven by a motor which exerts a constant torque while the load taken off the shaft fluctuates from zero to maximum during each revolution. If the maximum fluctuating in energy in one cycle is AE=242 N.m. Find the moment of inertia of the flywheel (I) to be mounted on the shaft so that the speed fluctuating shall not be more than 3 r.p.m. above or below a .mean speed of N=200 r.p.m

NAME Question 1 (6/20) ANSWER ON THE YELLOW PAGES The nose wheel of the landing gear of an aircraft is extended and retracted by applying a torque M to the rod BC by means of an shaft located at point B. The rod AO, on which the landing wheel is also located, has a combined mass of 100 kg which may be simplified to a point force at point G. The masses of the bars CD and BC may be neglected. If the point D is located underneath point B, the rod CD is at an angle of 30° to the vertical y-axis. At this position the landing gear should be kept stationary, dynamic effects may therefore be neglected. All components are made out of stainless steel with max=200 MPa and Imax = 75 MPa. ALO d. 800 mm 400 mm 200 mm B 300 D M 500 mm OC 500 mm A D Questions, also draw all relevant free-body diagrams: a. Calculate the magnitude of the reaction force at point A. b. Calculate the minimum diameter of the pin in point A. The connection in point A is realized as shown on the right figure. Use a safety…

In the image on the right, there is a red gear G1 on the left with a radius of r1 = 2.81cm. Gear G1 is locked to the green gear G2 with a radius of r2 = 0.734cm. Gear G2 then shares the same axle as the blue circular saw G3, which has a radius of r3 known to make a full rotation every T = 0.836s. Using at least 6 significant digits in your calculations, compute the following: V3! 12.8cm. Gear G1 is W1 a) The angular speed wi of gear G1. Remember that angular speed is measured in radians per T3 r2 unit time. G2 b) The rim speed vi of gear G1. Since gears G1 and G2 are locked together, the rim speed of G2 is also v1. G1 G3 c) The angular speed w2 of gear G2. Since gear G2 and saw G3 share the same axle, the angular speed of G3 is also w2. d) The rim speed v3 of saw G3.

Suppose a 30 lb truck wheel 18 in. in diameter has a radius of gyration of 4 in. and the 6120 lb truck’s weight is distributed equally to each of the four wheels.a. If the truck can supply 150 lb x ft of torque to each wheel, how fast would the wheel want to accelerate if it didn’t slip? b. What would the coefficient of friction have to be in order to keep the wheel from slipping

The round stepped shaft (diameters d and D) shown below is a design for an exoplanet rover wheel axle. Assuming the wheel is stuck, a torque from the motor is transmitted to the axle but it is not rotating. The reaction of the weight of the rover on the ground and the torque the wheel applies to the ground are represented by the force F acting in the center of the wheel hub (not shown) at point C. There is a sharp fillet at B with radius r shown below. Bearings are shown at point A and next to point B. You may assume the bearing at B resists the bending moment caused by the force F and acts like a fixed reaction. В A L2 L1 T L3 - ØD Ød R. r F SUBMIT ANSWERS HERE: Paramete Parameter Value Value SUT (tension) 400 MPa | L1 400 mm Suc (Compression) 600 Мра L2 200 mm Sy 380 MPа L3 100 mm 600 N-m ø d 40 mm F 0.2 kN ø D 55 mm R. r 8 mm