Steam Engine Design/Piston Valve - Revision history

Mjn at 17:02, 22 June 2011

2011-06-22T17:02:00Z

← Older revision		Revision as of 17:02, 22 June 2011
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	{{Category=Steam Engine}}		{{Category=Steam Engine}}
			[[Steam Engine Design/Valves]]

	One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose its stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.		One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose its stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.

Mjn at 17:23, 6 May 2011

2011-05-06T17:23:25Z

← Older revision		Revision as of 17:23, 6 May 2011
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	While the piston valve solves the problem of spring failure, it introduces another problem. The valve enters the cylinder cap through the valve seat as the piston head moves past top dead center. It must enter the valve seat precisely else chipping of the valve or the valve seat is likely. Furthermore, the fit of the valve in the cylinder cap must be tight or steam will leak through it.		While the piston valve solves the problem of spring failure, it introduces another problem. The valve enters the cylinder cap through the valve seat as the piston head moves past top dead center. It must enter the valve seat precisely else chipping of the valve or the valve seat is likely. Furthermore, the fit of the valve in the cylinder cap must be tight or steam will leak through it.

			[[Image:Design-3-A.png]]

			[[Image:Design-3-B.png]]

			[[Image:Design-3-C.png]]


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

Marcin at 14:05, 5 May 2011

2011-05-05T14:05:46Z

← Older revision		Revision as of 14:05, 5 May 2011
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	{{Category=Steam Engine}}		{{Category=Steam Engine}}

	One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose ~~it's~~ stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.		One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose its stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.

	[[Image:Piston-Valve.png]]		[[Image:Piston-Valve.png]]

Mjn at 13:47, 5 May 2011

2011-05-05T13:47:58Z

← Older revision		Revision as of 13:47, 5 May 2011
Line 1:		Line 1:
	{{Category:Steam Engine}}		{{Category=Steam Engine}}

	One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose it's stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.		One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose it's stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.
Line 7:		Line 7:
	While the piston valve solves the problem of spring failure, it introduces another problem. The valve enters the cylinder cap through the valve seat as the piston head moves past top dead center. It must enter the valve seat precisely else chipping of the valve or the valve seat is likely. Furthermore, the fit of the valve in the cylinder cap must be tight or steam will leak through it.		While the piston valve solves the problem of spring failure, it introduces another problem. The valve enters the cylinder cap through the valve seat as the piston head moves past top dead center. It must enter the valve seat precisely else chipping of the valve or the valve seat is likely. Furthermore, the fit of the valve in the cylinder cap must be tight or steam will leak through it.

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

Mjn: Added category.

2011-05-05T13:46:04Z

Added category.

← Older revision		Revision as of 13:46, 5 May 2011
Line 1:		Line 1:
			{{Category:Steam Engine}}

	One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose it's stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.		One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose it's stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.

Line 4:		Line 6:

	While the piston valve solves the problem of spring failure, it introduces another problem. The valve enters the cylinder cap through the valve seat as the piston head moves past top dead center. It must enter the valve seat precisely else chipping of the valve or the valve seat is likely. Furthermore, the fit of the valve in the cylinder cap must be tight or steam will leak through it.		While the piston valve solves the problem of spring failure, it introduces another problem. The valve enters the cylinder cap through the valve seat as the piston head moves past top dead center. It must enter the valve seat precisely else chipping of the valve or the valve seat is likely. Furthermore, the fit of the valve in the cylinder cap must be tight or steam will leak through it.

			[[Category=Steam Engine]]

Mjn: Created page with "One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, thi..."

2011-05-05T01:34:14Z

Created page with "One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, thi..."

New page

One of the problems with the bump valve (and some other kinds of steam engine valves) is that spring used hold the valve closed heats up from the steam around it. Over time, this weakens the spring (annealing, likely) causing either to fail or lose it's stiffness and ability to keep the valve closed. A piston valve eliminates that problem by doing away with the spring.

[[Image:Piston-Valve.png]]

While the piston valve solves the problem of spring failure, it introduces another problem. The valve enters the cylinder cap through the valve seat as the piston head moves past top dead center. It must enter the valve seat precisely else chipping of the valve or the valve seat is likely. Furthermore, the fit of the valve in the cylinder cap must be tight or steam will leak through it.