Steam Engine Design/Crankshaft - Revision history

Mjn at 23:53, 29 June 2011

2011-06-29T23:53:51Z

← Older revision		Revision as of 23:53, 29 June 2011
Line 12:		Line 12:
	With careful welding, this crankshaft should come close to being balanced, though the piston rod may upset the overall balance. Balance can be further adjusted by removing or adding metal to the offset weights.		With careful welding, this crankshaft should come close to being balanced, though the piston rod may upset the overall balance. Balance can be further adjusted by removing or adding metal to the offset weights.

			=CAD=

			[[Image:crankshaft-large.png]]

	=Diagram=		=Diagram=

Mjn at 22:07, 9 June 2011

2011-06-09T22:07:03Z

← Older revision		Revision as of 22:07, 9 June 2011
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	[[Image:Crankshaft-2.png]]		[[Image:Crankshaft-2.png]]

	The ~~current~~ crank pin offset is 4", which corresponds to the ~~current~~ piston cycle length.<br>		The crank pin offset is 2", which corresponds to the half the piston cycle length.<br>
	The bearing case on the piston connector rod is 3" wide, which adds 1.5" to the offset.<br>		The bearing case on the piston connector rod is 3" wide, which adds 1.5" to the offset.<br>
	Add another 1" for clearance gives a total of 6.5" distance between the crankshaft center line and the top of the base plate.<br>		Add another 1" for clearance gives a total of 4.5" distance between the crankshaft center line and the top of the base plate.<br>

Mjn at 16:23, 9 June 2011

2011-06-09T16:23:20Z

← Older revision		Revision as of 16:23, 9 June 2011
Line 11:		Line 11:

	With careful welding, this crankshaft should come close to being balanced, though the piston rod may upset the overall balance. Balance can be further adjusted by removing or adding metal to the offset weights.		With careful welding, this crankshaft should come close to being balanced, though the piston rod may upset the overall balance. Balance can be further adjusted by removing or adding metal to the offset weights.


	=Diagram=		=Diagram=

	[[Image:Crankshaft-2.png]]		[[Image:Crankshaft-2.png]]

			The current crank pin offset is 4", which corresponds to the current piston cycle length.<br>
			The bearing case on the piston connector rod is 3" wide, which adds 1.5" to the offset.<br>
			Add another 1" for clearance gives a total of 6.5" distance between the crankshaft center line and the top of the base plate.<br>


	=Fabrication Notes=		=Fabrication Notes=

Marcin: /* Fabrication Notes */

2011-05-14T20:18:21Z

Fabrication Notes

← Older revision		Revision as of 20:18, 14 May 2011
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	The crank pin and offset weights will need to be carefully cut. Using a cutting torch is not accurate enough since crank pin and offset weights must be of equal weight. A thin cutting wheel would probably do it.		The crank pin and offset weights will need to be carefully cut. Using a cutting torch is not accurate enough since crank pin and offset weights must be of equal weight. A thin cutting wheel would probably do it.

			==Fabrication Procedure==
			#Cut shaft to size

			#Weld crank to shaft
			#Face off crank arms on a lathe
			#Drill out 2 crank arms one on top of the other
			#Bolt crank pin in place
			#Use bearing on crank shaft end

			The above addresses perfect alignment of main shaft and crank pin. Welds can be added on the opposite end for perfecting the counterbalance.

	[[Category:Steam Engine]]		[[Category:Steam Engine]]

Mjn: /* Fabrication Notes */

2011-05-14T15:27:32Z

Fabrication Notes

← Older revision		Revision as of 15:27, 14 May 2011
Line 20:		Line 20:
	Welds are shown in blue in the diagram above. Initial prototype of the crankshaft should be welded rather than complicating the design with an assembly that can be taken apart. Later, a more modular design might be necessary to accommodate multiple steam engine cylinders.		Welds are shown in blue in the diagram above. Initial prototype of the crankshaft should be welded rather than complicating the design with an assembly that can be taken apart. Later, a more modular design might be necessary to accommodate multiple steam engine cylinders.

	The crank pin and offset weights will need to be carefully cut. Using a cutting torch is not accurate enough since crank pin and offset weights must be of equal weight. A ~~think~~ cutting wheel would probably do it.		The crank pin and offset weights will need to be carefully cut. Using a cutting torch is not accurate enough since crank pin and offset weights must be of equal weight. A thin cutting wheel would probably do it.

	[[Category:Steam Engine]]		[[Category:Steam Engine]]

Mjn: /* Fabrication Notes */

2011-05-14T15:27:16Z

Fabrication Notes

← Older revision		Revision as of 15:27, 14 May 2011
Line 19:		Line 19:

	Welds are shown in blue in the diagram above. Initial prototype of the crankshaft should be welded rather than complicating the design with an assembly that can be taken apart. Later, a more modular design might be necessary to accommodate multiple steam engine cylinders.		Welds are shown in blue in the diagram above. Initial prototype of the crankshaft should be welded rather than complicating the design with an assembly that can be taken apart. Later, a more modular design might be necessary to accommodate multiple steam engine cylinders.

			The crank pin and offset weights will need to be carefully cut. Using a cutting torch is not accurate enough since crank pin and offset weights must be of equal weight. A think cutting wheel would probably do it.

	[[Category:Steam Engine]]		[[Category:Steam Engine]]

Mjn: /* Description */

2011-05-14T15:25:03Z

Description

← Older revision		Revision as of 15:25, 14 May 2011
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	* Pillow blocks with internal bearings		* Pillow blocks with internal bearings

	With careful welding, this crankshaft should come close to being balanced, though the piston rod may upset the balance. Balance can be further adjusted by removing or adding metal to the offset weights.		With careful welding, this crankshaft should come close to being balanced, though the piston rod may upset the overall balance. Balance can be further adjusted by removing or adding metal to the offset weights.

	=Diagram=		=Diagram=

Mjn: Created page with "{{Category=Steam Engine}} =Description= This is the proposed design for a crankshaft design using a simple return arm. '''Features''' * Crank arms are balanced by equal weight..."

2011-05-14T13:05:07Z

Created page with "{{Category=Steam Engine}} =Description= This is the proposed design for a crankshaft design using a simple return arm. '''Features''' * Crank arms are balanced by equal weight..."

New page

{{Category=Steam Engine}}

=Description=

This is the proposed design for a crankshaft design using a simple return arm.

'''Features'''
* Crank arms are balanced by equal weight of metal on both sides of the centerline of the shaft.
* Crank pin is balanced by taking an equal length of metal, splitting it into two, and welding the pieces on the opposite side of the crank arm.
* Pillow blocks with internal bearings

With careful welding, this crankshaft should come close to being balanced, though the piston rod may upset the balance. Balance can be further adjusted by removing or adding metal to the offset weights.

=Diagram=

[[Image:Crankshaft-2.png]]

=Fabrication Notes=

Welds are shown in blue in the diagram above. Initial prototype of the crankshaft should be welded rather than complicating the design with an assembly that can be taken apart. Later, a more modular design might be necessary to accommodate multiple steam engine cylinders.

[[Category:Steam Engine]]