Crankshaft
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#1
04-10-2010, 04:11 PM



.docx   Crankshaft.docx (Size: 489.2 KB / Downloads: 121)
This article is presented by:
1) vikas dogra
2) VIKRAM KHULLAR
3) VISHAL PRASHER
4) avinav goel
5) sukhwinder singh

MECHNICAL 2snd YEAR
M.E.-4Y
Crankshaft
INTRODUCTION
The crankshaft, sometimes casually abbreviated to crank, is the part of an engine which translates reciprocating linear piston motion into rotation. To convert the reciprocating motion into rotation, the crankshaft has "crank throws" or "crankpins", additional bearing surfaces whose axis is offset from that of the crank, to which the "big ends" of the connecting rods from each cylinder attach.
It typically connects to a flywheel, to reduce the pulsation characteristic of the four-stroke cycle, and sometimes a torsional or vibrational damper at the opposite end, to reduce the torsion vibrations often caused along the length of the crankshaft by the cylinders farthest from the output end acting on the torsional elasticity of the metal.

DESIGN
Large engines are usually multicylinder to reduce pulsations from individual firing strokes, with more than one piston attached to a complex crankshaft. Many small engines, such as those found in mopeds or garden machinery, are single cylinder and use only a single piston, simplifying crankshaft design. This engine can also be built with no riveted seam.
Engine balance
For some engines it is necessary to provide counterweights for the reciprocating mass of each piston and connecting rod to improve engine balance. These are typically cast as part of the crankshaft but, occasionally, are bolt-on pieces. While counter weights add a considerable amount of weight to the crankshaft it provides a smoother running engine and allows higher RPMs to be reached..
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#2
16-07-2012, 09:42 AM

to get information about the topic "design and analysis of connecting rod and crankshaft" full report ppt and related topic refer the link bellow

topicideashow-to-crank-and-connecting

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