Steam Engine Crank - Revision history

Mjn at 03:05, 11 May 2011

2011-05-11T03:05:57Z

← Older revision		Revision as of 03:05, 11 May 2011
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	An arm attached at right angles to a shaft to which the piston connector rod is attached. See wikipedia [http://en.wikipedia.org/wiki/Crank_%28mechanism%29]. While the return crank is simpler to make, in some ways, it requires that the offset crank be balanced by an equal weight of metal on the opposite side of the drive shaft. This can be difficult to calculate and often requires dynamic balancing.		An arm attached at right angles to a shaft to which the piston connector rod is attached. See wikipedia [http://en.wikipedia.org/wiki/Crank_%28mechanism%29]. While the return crank is simpler to make, in some ways, it requires that the offset crank be balanced by an equal weight of metal on the opposite side of the drive shaft. This can be difficult to calculate and often requires dynamic balancing.
			See also, [[Steam Engine Crank/Return Crank]].

	=Some Designs=		=Some Designs=

2011-05-11T01:49:59Z

← Older revision		Revision as of 01:49, 11 May 2011
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	(How is it balances? Does it require balancing?)		(How is it balances? Does it require balancing?)

			[[Image:Return-Crank-2.png\|thumb]]
	'''Return Crank'''		'''Return Crank'''

2011-05-11T01:38:50Z

← Older revision		Revision as of 01:38, 11 May 2011
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	The intent of a crankshaft is to convert the linear, simple-harmonic-motion, of a piston into rotational energy. This can done in a variety of ways:		The intent of a crankshaft is to convert the linear, simple-harmonic-motion, of a piston into rotational energy. This can done in a variety of ways:

			[[Image:Eccentric.png\|thumb]]
	'''Eccentric'''		'''Eccentric'''
	~~[[Image:Eccentric.png\|thumb]]~~

	An offset disk (eccentric sheave) surrounded by a circular piece of metal (eccentric strap) that attaches to the piston connector rod. See wikipedia [http://en.wikipedia.org/wiki/Eccentric_%28mechanism%29].		An offset disk (eccentric sheave) surrounded by a circular piece of metal (eccentric strap) that attaches to the piston connector rod. See wikipedia [http://en.wikipedia.org/wiki/Eccentric_%28mechanism%29].

2011-05-11T01:38:33Z

← Older revision		Revision as of 01:38, 11 May 2011
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	'''Eccentric'''		'''Eccentric'''
			[[Image:Eccentric.png\|thumb]]

	An offset disk (eccentric sheave) surrounded by a circular piece of metal (eccentric strap) that attaches to the piston connector rod. See wikipedia [http://en.wikipedia.org/wiki/Eccentric_%28mechanism%29].		An offset disk (eccentric sheave) surrounded by a circular piece of metal (eccentric strap) that attaches to the piston connector rod. See wikipedia [http://en.wikipedia.org/wiki/Eccentric_%28mechanism%29].
	The eccentric has the advantage that the drive shaft doesn't have to be broken to capture energy from a piston/cylinder. Also, it can be adjusted around the shaft for timing purposes,especially if more than one eccentric is used on a single shaft.		The eccentric has the advantage that the drive shaft doesn't have to be broken to capture energy from a piston/cylinder. Also, it can be adjusted around the shaft for timing purposes,especially if more than one eccentric is used on a single shaft. See also, [[Steam Engine Crank/Eccentric]].

	(How is it balances? Does it require balancing?)		(How is it balances? Does it require balancing?)

2011-05-10T14:29:20Z

← Older revision		Revision as of 14:29, 10 May 2011
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	{{Category=Steam Engine}}		{{Category=Steam Engine}}

			=Elements=

			The intent of a crankshaft is to convert the linear, simple-harmonic-motion, of a piston into rotational energy. This can done in a variety of ways:

			'''Eccentric'''

			An offset disk (eccentric sheave) surrounded by a circular piece of metal (eccentric strap) that attaches to the piston connector rod. See wikipedia [http://en.wikipedia.org/wiki/Eccentric_%28mechanism%29].
			The eccentric has the advantage that the drive shaft doesn't have to be broken to capture energy from a piston/cylinder. Also, it can be adjusted around the shaft for timing purposes,especially if more than one eccentric is used on a single shaft.

			(How is it balances? Does it require balancing?)

			'''Return Crank'''

			An arm attached at right angles to a shaft to which the piston connector rod is attached. See wikipedia [http://en.wikipedia.org/wiki/Crank_%28mechanism%29]. While the return crank is simpler to make, in some ways, it requires that the offset crank be balanced by an equal weight of metal on the opposite side of the drive shaft. This can be difficult to calculate and often requires dynamic balancing.

			=Some Designs=

	[[Image:steamenginecrank.jpg]]		[[Image:steamenginecrank.jpg]]

2011-05-01T22:11:47Z

Added category.

2011-04-30T02:25:53Z

Changed category reference.

2011-04-29T02:06:17Z

2011-04-29T02:06:03Z

2010-11-07T14:57:42Z

← Older revision		Revision as of 14:57, 7 November 2010
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	[[Image:crank.jpg]]		[[Image:crank.jpg]]

	[[Category:Steam Engine ~~Construction Set~~]]		[[Category:Steam Engine]]