Steam Engine Breakdown: Difference between revisions
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=Design= | |||
[[File:Design-Chart.png]] | [[File:Design-Chart.png]] | ||
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Later designs could include an oil separator on output, quick connectors for steam input and exhaust, oil-less design, etc. | Later designs could include an oil separator on output, quick connectors for steam input and exhaust, oil-less design, etc. | ||
==Fabrication | =Geometry= | ||
[[File:Geometry.png]] | |||
For analysis and dimension purposes, the following are defined: | |||
{| | |||
|- | |||
!Variable | |||
!Exlanation | |||
|- | |||
| Clen | |||
| Interior length of the cylinder. | |||
|- | |||
| Cdia | |||
| Interior diameter of the cylinder (or perhaps the sleeve). | |||
|- | |||
| Coff | |||
| Distance from the end of cylinder to the center of the crankshaft. | |||
|- | |||
| Ptrav | |||
| Total distance the piston travels. | |||
|- | |||
| Pstrt | |||
| Piston starting point (bump valve fully open). | |||
|- | |||
| Pmid | |||
| Piston mid-point. Max crankshaft offset. | |||
|- | |||
| Pend | |||
| Piston end point. | |||
|- | |||
| Prod | |||
| Piston rod length. | |||
|- | |||
| Soff | |||
| Crankshaft offset. | |||
|- | |||
|} | |||
Questions to be answered given the geometry: | |||
* How long does the piston rod (Prod) have to be? | |||
* Given a Cdia, how long is Coff to clear the end of the cylinder? | |||
=Fabrication= | |||
[[File:Fab-Chart.png]] | [[File:Fab-Chart.png]] | ||
| Line 41: | Line 84: | ||
** Crankshaft support assembly | ** Crankshaft support assembly | ||
=Performance= | |||
[[File:Performance-Chart.png]] | [[File:Performance-Chart.png]] | ||
Revision as of 15:56, 29 April 2011
Design
Prototype 1 Design Elements:
- Cylinder
- Piston Assembly
- Bump Valve Assembly
- Oil Sprayer
- Crankshaft
Later designs could include an oil separator on output, quick connectors for steam input and exhaust, oil-less design, etc.
Geometry
For analysis and dimension purposes, the following are defined:
| Variable | Exlanation |
|---|---|
| Clen | Interior length of the cylinder. |
| Cdia | Interior diameter of the cylinder (or perhaps the sleeve). |
| Coff | Distance from the end of cylinder to the center of the crankshaft. |
| Ptrav | Total distance the piston travels. |
| Pstrt | Piston starting point (bump valve fully open). |
| Pmid | Piston mid-point. Max crankshaft offset. |
| Pend | Piston end point. |
| Prod | Piston rod length. |
| Soff | Crankshaft offset. |
Questions to be answered given the geometry:
- How long does the piston rod (Prod) have to be?
- Given a Cdia, how long is Coff to clear the end of the cylinder?
Fabrication
Prototype 1 Fabrication Elements:
- Cylinder
- Cylinder support assembly
- Cylinder sleeve
- Piston
- Piston Rod
- Bump Valve
- Ball
- Spring
- Bump Rod
- Case
- Steam Connection ??
- Oil sprayer
- Crankshaft
- Shaft pieces (2)
- Offset plates (2)
- Crank piece (1)
- Couplers (2)
- Screws
- Crankshaft support assembly
Performance
Components
Crankshaft
- no welding in this design.
- does require tapping holes for machine screws.
- needs counterbalance to not vibrate.
Bump Valve
This is one possible design for a bump valve.