Introduction to Kinematics and Dynamics of Machines
Explore the fundamentals of mechanisms and machines in Kinematics and Dynamics of Machines (KDM) at L. E. College, Morbi. Learn about the slider-crank mechanism inversions and their applications, as well as the double slider-crank chain and its inversions like elliptical trammels.
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Presentation Transcript
KINEMATICS & DYNAMICS OF MACHINES (KDM) L. E. College, Morbi-2 Industrial Engineering Department Chapter-01 Introduction of Mechanisms and Machines Prepared by Prof. Divyesh B. Patel Mechanical Engg. Dept LE. College, Morbi +919925282644 divyesh21dragon@gmail.com
Inversion of slider -crank 1) First inversion This inversion is obtained when link 1 is fixed and links 2 and 4 are made the crank and slider respectively. Applications: a) Reciprocating engine b) Reciprocating compressor
Inversion of slider -crank 2) Second inversion Fixing of the link 2 of a slider-crank chain results in the second inversion. Applications: a) Whitworth quick-return mechanism b) Rotary engine
Inversion of slider -crank 3) Third Inversion By Fixing of the link 3 of the slider-crank mechanism, the third inversion is obtained. Now the link 2 again acts as a crank and the link 4 oscillates. Applications: a) Oscillating cylinder engine b) Crank and slotted-lever mechanism
Inversion of slider -crank 4) Fourth Inversion If the link 4 of the slider-crank mechanism is fixed, the fourth inversion is obtained. Link 3 can oscillates about the fixed pivot B on the link 4. This makes the end A of the link 2 to oscillate about B and the end O to reciprocate along the axis of the fixed link 4. Application: a) Hand Pump
Double Slider -crank A kinematic chain which consists of two turning pairs and two sliding pairs is known as double slider crank chain
Inversion of double slider -crank 1. Elliptical trammels
Inversion of double slider -crank 2.Scotch yoke mechanism
Inversion of double slider -crank 3. Oldham s coupling
