Steam Engine 3

[den]

I drew a two-valve system that would use one push-rod and a linkage to make the two valves oscillate in opposite timing, but then I realised I could do that with a one-valve system. The heads are simpler and it's less complicated without the linkages. Also did a major re-design of the engine block.



Two-valve system


One valve system. Instead of the pipe there could be a port directly into the cylinder.


The piston is at top-dead-centre here.

Comments

[makovette.livejournal.com]

Cool beans Batty! I'm loving this stuff

Explain the operation of that ported sleeve valve you've got there in the bottom photo would you please?

Any plans for a water mist injector to pull the piston back up after BDC is reached?

Also, how's the condensate get out? I suppose if the engine sat on the head, gravity would evacuate most of the water...?

CYa!
Mako
Un-obvious Zzyzxian

[dewhitton.livejournal.com]

the valve works like this:


One valve opens and closes both ports, instead of a valve per port.

After BDC the flywheel should push the piston back to TDC. I'm working on a steam condenser/water recycling system that will use a small single piston/2 valve water pump to create a partial vacuum in a cylinder where the exhaust goes. This will have the same effect as a double-action steam engine, with atmospheric pressure instead of steam doing the pushing. Future plans.

I've never really worried about condensate. Little engines like this get hot enough to stop it during running, and it takes a few minutes to pull them apart afterwards.

...now I really want to build this.