WEEK 12 Dynamics of Machinery

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Sunum transkripti:

WEEK 12 Dynamics of Machinery References Theory of Machines and Mechanisms, J.J.Uicker, G.R.Pennock ve J.E. Shigley, 2003 Prof.Dr.Hasan ÖZTÜRK Dr.H.ÖZTÜRK-2010

DYNAMICS OF RECIPROCATING ENGINES (INERTIA FORCES) Using the methods of the preceding section, we begin by locating equivalent masses at the crankpins and at the wrist pin. Thus For constant angular velocity, =0 the total inertia force (Shaking Force) for all the moving parts. The components in the x and y directions are: the inertia torque (Shaking Torque) exerted by the engine on the crank shaft is: Prof.Dr.Hasan ÖZTÜRK

BALANCING A SINGLE-CYLINDER ENGINE: If it is designate the mass of the counterweight by mc Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

BALANCING A SINGLE-CYLINDER ENGINE: If it is designate the mass of the counterweight by mc Shaking Force Primary (First harmonic) Secondary (Second harmonic) Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Multicylinder Engines Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Prof.Dr.Hasan ÖZTÜRK

Q1- Examine the balance of the first harmonic forces and moments of a 4 cylinder-2 stroke engine. Firing order is 1-2-3-4. Assume all the slider-crank mechanisms are identical. Q3- In an in-line six cylinder engine working on four stroke cycle, the cylinder center line are spaced at equal intervals. The firing order is 1-5-6-4-3-2. Draw the secondary crank positions and examine the engine for balance of the secondary forces and couples. Prof.Dr.Hasan ÖZTÜRK