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INPUT   DATA

♥ EXAMPLE Of Input/Output

Title

Length of Connecting rod, L		length
Radius of Crank, R		length
Angular velocity of Crank, ω		rpm
Instantaneous Crank Angle, θ		°

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OUTPUT   VARIABLES   &   GRAPHS

VARIABLES	Values	Units
♦ Displacement, X		length	Graphs:  Slider displacement Vs Crank angle    Velocity Vs Angle    Acceleration Vs Angle
♦Angular Velocity of Rod, dφ/dt		rpm/s
♦Linear Velocity of Slider, dX/dt		length/s
♦ Angular Acceleration, d2φ/dt2		rpm/s2
♦Slider Acceleration, d2X/dt2		length/s2

Slider Crank Mechanism

A mechanism is a device used to produce mechanical transformation in a machine. The crank-connecting rod & slider mechanism is used for converting angular (rotational) motion to linear (piston) motion. The following equations describe the kinematics of this mechanism:

where
     L = length of connecting rod
     R = radius of crank
     ω = constant angular velocity of crank
     X = distance from crankshaft center to wristpin of slider
     X′ = slider velocity
     X″ = slider acceleration
     θ = crank angle from dead center, +ve anticlockwise
     φ = angular position of connecting rod; φ=0 when θ=0
     φ′ = connecting rod angular velocity
     φ″ = connecting rod angular acceleration

All lengths are in the same units.

Tips

    ◊ Use link EXAMPLE Of Input/Output  to demo data entry expectations and results; you may edit & use it as starting point

BIBLIOGRAPHY

• Walsh RA; Handbook Of Machining And Metalworking Calculations; McGraw Hill, New York, 2001, Chapter 11.
• Brown TH; Mark's Calculations for Machine Design; McGraw Hill, New York, 2005, Chapter 10.