Solve for part 3 only. ie Angular velocities of links AB and CD. 4.The crank OA of a mechantsm, as shown in Fig. 6.30, rotates clockwise at 120 r.p.m. The lengths ofvartous links are : OA = 100 mm : AB= 500 mm : AC = 100 mm and CD = 750 mm.303.6.DA150 mm45Fig. 6.30140 • Theory of MachinesFind, by instantaneous centre method : 1. Velocity of point C; 2. Velocity of slider D: and 3. Angularvelocities of the links ABand CD.[Ans. 0.115 m/s; 0.065 m/s; 3 rad/s; 1.3 rad/s]

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Answered: The crank OA of a mechanism, as shown…

The crank OA of a mechanism, as shown in Fig. 6.30, rotates clockwise at 120 r.p.m. The lengths of various links are : OA = 100 mm : AB= 500 mm ; AC = 100 mm and CD = 750 mm.

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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8. The dimensions of various links in a mechanism, as shown in Fig. 6.34, are as follows: F. 125 mm E B 90 mm A Fig. 6.34 AB = 25 mm ; BC = 175 mm ; CD = 60 mm ; AD = 150 mm ; BE = EC ; and EF = FG = 100 mm. The crank AB rotates at 200 r.p.m. When the angle BAD is 135°, determine by instantaneous centre method : 1. Velocity of G, 2. Angular velocity of EF, and 3. Velocity of sliding of EF in the swivel block S. [Ans. 120 mm/s ; 6.5 rad/s; 400 mm/s]
H.W (1): An engine flywheel has a mass of 6.5 tonnes and the radius of gyration is 2 m. If the maximum and minimum speeds are 120 r. p. m. and 118 r. p. m. respectively, find maximum fluctuation of energy. [Ans. 67. 875 kN-m] H.W (2): The turning moment diagram for a multicylinder engine give maximum fluctuating of energy 7914 N.m when the engine is running at 150 r.p.m. If the mass of the flywheel is 1000 kg and the total fluctuation of speed does not exceed 3% of the mean speed, find the minimum value of the radius of gyration. [Ans. 1.034 m]
8. A Hooke's joint connects two shafts whose axes intersect at 150°. The driving shaft rotates uni- formly at 120 r.p.m. The driven shaft operates against a steady torque of 150 N-m and carries a flywheel whose mass is 45 kg and radius of gyration 150 mm. Find the maximum torque which will be exerted by the driving shaft. [Ans. 187 N-m] mum
Example 7.5. In a mechanism shown in Fig. 7.13, the crank OA is 100 mm long and rotales clockwise about O at 120 r.p.m. The connceting rod AB is 400 mm long. At a point C on AB, 150 mm from A, the rod CE 350 mm long is attached. This rod CE slid in a slot in a trunnion at D. The end E is connected by a link EF, 300 mm long to the horizontal moving slider F. For the mechanism in the position shown, find 1. velocity of F, 2. velocity of sliding of CE the trunnion, and 3. angular velocity of CE. E 200 mm F 300 mm A 30°
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Q.1. In a mechanism shown in Fig. 1, the crank OA is 100 mm long and rotates clockwise about O at 120 r.p.m. The connceting rod AB is 400 mm long. At a point C on AB, 150 mm from A, the rod CE 350 mm long is attached. This rod CE slides in a slot in a trunnion at D. The end E is connected by a link EF, 300 mm long to the horizontally moving slider F. Draw the mechanism at angle (0° ,45°,90° ) +200 mm > F B Fot 300 mm Figl A 45
H.W (2): In a mechanism shown in figure, the crank OA is 100 mm long and rotates clockwise about O at 120 r.p.m. The connecting rod AB is 400 mm long. At a point C on AB, 150 mm from A, the rod CE 350 mm long is attached. This rod CE slides in a slot in a trunnion at D. The end E is connected by a link EF, 300 mm long to the horizontally moving slider F. For the mechanism in the position shown, find 1.velocity of F, 2.velocity of sliding of CE in the trunnion, and 3. angular velocity of CE. 200 mm→ D 300 mm A 30 1. V = vector of=0.53 m/s Ans. 2. vector od = 1.08 m/s Ans. 3. OCE = 1.26 rad/s (Clockwise about E) Ans.
H.W (2): In a mechanism shown in figure, the crank OA is 100 mm long and rotates clockwise about O at 120 r.p.m. The connecting rod AB is 400 mm long. At a point C on AB, 150 mm from A, the rod CE 350 mm long is attached. This rod CE slides in a slot in a trunnion at D. The end E is connected by a link EF, 300 mm long to the horizontally moving slider F. For the mechanism in the position shown, find 1.velocity of F, 2.velocity of sliding of CE in the trunnion, and 3. angular velocity of CE. 200 mm trr D 300 mm A 30 1. V = vector of= 0.53 m/s Ans. 2. vector od = 1.08 m/s Ans. 3. OCE = 1.26 rad/s (Clockwise about E) Ans.
Given: A shaft rotates about a fixed vertical axis at a constant rate of f, as shown below. A straight bar OA, having a length of L, is pinned to point O on the shaft, with O being on the rotation axis of the shaft. At the instant when 80, bar OA is being raised at a rate of 6 from the horizontal plane, with this rate changing at a rate of . A set of ryz coordinate axes is attached to bar OA with its origin at O. A second set of coordinate axes, XYZ, are fixed to ground. At the instant when = 0, the zyz and XYZ axes are aligned with each other. Find: For the instant when -0°, determine the angular velocity and angular acceleration of har OA. vertical shaft bearing O 8 X bar Use the following parameters in your analysis: f2=5 rad/s, é = 4 rad/s, 6-3 rad/s² and L=2 m.
Example(6):- In a slider crank mechanism, the length of the crank (OB) and connecting rod (AB) are (125mm and 500 mm) respectively. The centre of gravity (G) of the connecting rod is (275 mm) from the slider (A). The crank speed is (600 r.p.m) clockwise. When the crank has turned (45°) from the inner dead centre position, determine: 1. Velocity of the slider(A), 2. Velocity of the point (G), and connecting rod (AB). 3. Angular velocity of the [Ans. 6.45 m/sec; 6.75 m/sec; 10.8 rad/sec]