Steam Engine Breakdown: Difference between revisions
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This is one possible design for a bump valve. | This is one possible design for a bump valve. | ||
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Revision as of 02:24, 30 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.
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