Essay About Scotch Yoke Mechanism And Linear Displacement Of The Scotch Yoke

Yoke Mechaism
Yoke Mechaism
Background of StudyIn this laboratory we will investigate the kinematics of some simple mechanisms used to convert rotary motion into oscillating linear motion and vice-versa. Pure simple harmonic motion is produced by the Scotch Yoke mechanism when driven by an eccentric or crank. Scotch Yoke takes a revolution per minute per minute and converts it to a linear velocity.  It can be shown that:X = r ( 1 – cos  )[pic 1]By differentiation:        Velocity [pic 2]        Acceleration [pic 3]ObjectivesTo demonstrate the action of a simple of crank-driven Scotch Yoke mechanism.To determine graphically the relationship between the linear displacement of the Scotch Yoke and the angular displacement of the crank.ApparatusSimple crank-driven scotch Yoke mechanism ProceduresTurned the circular ruler clock wise started from 10 until 360°.[pic 4]Displacement is measured at other side of crank-driven have ruler and indicator to shown the length and recorded.When full rotation is turn after that, turned the circular ruler anti clock wise started from 360° until 10°.And recorded.Create a table and graph[pic 5]Data and analysisClock wiseΘ ( ° )L ( mm )00100.52023034065096013701780219025.510029.5110341203813041.514044.515047160491705018050.519050200492104722044.523041.5240382503426029.527025.528021290173001331093206330334023500.53600Anti-clock wiseΘ ( ° )L ( mm )36003500.5340233033206310930013290172802127025.526029.5250342403823041.522044.521047200491905018050.517050160491504714044.513041.5120381103410029.59025.5802170176013509406303202100.500