Theory of Machines: Unit III: Friction in Machine Elements
review and summary
Friction in Machine Elements - Theory of Machines
review and summary: Friction in Machine Elements - Theory of Machines
REVIEW AND SUMMARY • At the beginning of this chapter, functions and principle of operation of the clutch are presented. • The three important types of friction clutches i.e., disc or plate clutches, cone clutches and centrifugal clutches are also discussed. • Single plate clutch: (i) Torque transmitted on the single plate clutch is given by T = μ • W • R where μ = Coefficient of friction, W = Axial thrust exerted by the springs, R = Mean radius of friction surface. r1 = External radius of friction surface, and r2 = Internal radius of friction surface. • Multiplate clutch: (i) Torque transmitted on the multiple plate clutch is given by T = n • μ • W • R where n = Number of pair of contact surfaces = n1 + n2 − 1, n1 = Number of discs on the driving shaft, and n2 = Number of discs on the driven shaft. (ii) Axial force to engage the clutch, W = 2πC (r1 −r2) (iii) Average pressure on the friction surface is given by (iv) Total number of plates = Number of pairs of contact surface + 1 • Cone clutch: (i) Torque transmitted on the cone clutch is given by (ii) Axial force required at the engagement of clutch is given by We = W (sin α + μ cos α) and axial force required at the disengagement is given by Wd = Wn (sin α - μ • cos a)
Theory of Machines: Unit III: Friction in Machine Elements : Tag: : Friction in Machine Elements - Theory of Machines - review and summary
Theory of Machines: Unit III: Friction in Machine Elements
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Theory of Machines
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