crankshaft slide
TRANSCRIPT
Crankshaft -aircraft engine-
Engine Component
Function of Crankshaft
• Changes reciprocating motion of pistons into rotating motion to drive propeller
• Constructed of chrome-nickel-molybdenum-steel• May be one piece or as many as three separate
pieces• The propeller mounts to the front of the
crankshaft using a spline, taper, or flange• The crankshaft rotates within the crankcase and is
supported by main bearing journals• Crankshaft throws or crankpins are off center and
account for the reciprocating motion of the pistons
TYPES OF CRANKSHAFT
• same plane • cross plane crank shaft
TYPES OF CRANKSHAFT
• Single-trow • Two-trow • Four-trow• Six-trow
Crankshaft Main Bearing Journal, Pin, Arm
Crankshaft
Crankshaft Ends For Mounting Propellers
How Crankshaft works ?
2 PIECE CRANKSHAFT WITH COUNTERWEIGHTS (SINGLE THROW, SINGLE CYLINDER )
STRESS ON CRANKSHAFT
• The shaft is subjected to various forces but generally needs to be analysed in two positions. Firstly, failure may occur at the position of maximum bending; this may be at the centre of the crank or at either end. In such a condition the failure is due to bending and the pressure in the cylinder is maximal. Second, the crank may fail due to twisting, so the conrod needs to be checked for shear at the position of maximal twisting. The pressure at this position is the maximal pressure, but only a fraction of maximal pressure
CRANKSHAFT
LOCATION
• CRANKSHAFT LOCATED AT AIRCRAFT ENGINEe
Materials
THE END