Simple Steam Turbine

by matrhint, published

Simple Steam Turbine by matrhint Dec 20, 2012
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6366Views 1846Downloads Found in Mechanical Toys


This is a simple three stage steam engine design that I hope to cast in aluminum sometime in the future. The design was based from the book "Model Steam Engines: How to Design and Build Them."


Print the parts out, construct the turbine (the top and bottom case parts can be hot-glued/heat gunned together, but I added some tabs so they can be tapped on the aluminum version), and then test it out (it should work with breath or compressed air).

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I'm thinking about building this, I was examining the parts, Compared to the lower half the upper half is hollow. Shouldn't the upper half also have built in static impellers, just like the lower half does?

I printed this out, and while it turned out pretty awesome, it required a bit of sanding to bring the tolerances to where it can spin. I think you may have added input on the top half on the wrong side? Let me know because the one I printed has them both on the same size

I'll try to take some pictures and upload them.

I am sorry about the size problem. My machine has been down for some time, so I haven't been able to try it yet. The design was inspired from a book I read at the university I attended. As I remember, the exhaust port was supposed to be at the big side (although it is counter-intuitive and seems illogical--with the knowledge that temperature and pressure are directly related), It may have to do with allowing for condensation and pressure buildup. I would also think that this should work opposite of a jet engine.
I am super excited to see pictures!
If you want I can change that part around for you so you can try it out both ways, and do the testing, and then we can reinforce the urges to go with our guts. I will get to work on it as soon as you say go.

Apologies, I meant side, not size. Shouldn't the input and the output be on opposite sides? They are currently both on the low pressure side (tall side) of the turbine housing in your STL files.

It was my fault, I redesigned it and forgot to upload the stl file for the change. I think the new file I uploaded should make it work. Your prints are amazing. I hope you get the new part printed and can test it out. Thanks for the heads up on the part and apologies for taking forever to get back with you on it.