Excellent concept! How about more video from other angles so as to view the profile? Great idea using a motor as a generator with the counterbalance beam in place of a regular flywheel. Looking forward to seeing more.
Did you try some test with a mix of Epoxy and graphite powder for your power piston ? To have less friction ( a graphite property ). I make some mix ration test between epoxy and graphite ( 2:1 , 1:1 and 1:2 by volume). It's seem to not altering the property of epoxy with all test a did and friction look like to be less.
have you thought of magnetically coupling the piston to the flywheel so that the motor can be sealed completely. No leakage ever... I just can't figure what to do with the gas on the other side of the piston. Maybe a dual chamber design.
That also brings the classic engineer's trick to think reverse. Put the piston on bottom and displacer on top. And then use magnetic repulsion. I'm unfortunatly no expert in sterling, so just throwing ideas around.
Hmmm. How about a diaphragm and a magnetically coupled displacer. It would then be completely sealed.
I've experimented with positive mag coupling and there are some big problems. Magnetic force is inversely proportional to distance squared (some would argue d^4). This means that if you want the coupling to be rigid, high(er) forces are involved to move things.
I think the benefits of good sealing are outweighed by increases in friction.
here's another idea thrown in. Some people argue that rotation is not the perfect stirling cycle. As magnets are so crazy on repulsion, an idea is to make a loose magnetic coupling and add a "magnetic hill" which will cause the piston to push against a magnetic resistance at first, once overcome it is the forced "downhill". Though it may be the same than connecting the piston with a spring.
I agree that using rotation to link displacer to piston does not give the perfect cycle. This was the basis of my thoughts for creating VersionI of this engine (the diaplacer snaps up and down [at low speed]).
Using a magnetic 'hill' would halve the forces and it would also be necessary to attract the displacer back up (or repel it back up from its underside) - which is possible .........
youre designe is more compact because the magnet is in the powerpiston.theres also less friction... good idea!
whats the temperature of the botten- & underplate? what kind of material did you use for that? and what kind of material did you use for the displacer?
When I cannot hold my hand on the bottom, it is hot enough!
Both top and bottom plates are aluminium. The chamber is made from 150mm polypropylene tube and the displacer is just expanded polystyrene.
A small tube is glued through the centre of the displacer. The tube moves up and down a piece of wire which is glued to the bottom plate. This keeps everything centered.
I would like to use your idea to drive the displacer both up and down and maybe produce more rpm.
my engine can run on ringbom- or differential stirling engine. because the magnet are not too strong. if the engine runs too fast the magnet will not react, this slow down the engine. its like a speedlimiter...
to run the engine on faster rpm you have to use stronger magnet, but with stronger magnet theres also more friction.
you will have the problem that magnets loose their magnetisme when heated. So putting it on bottom plate is difficult. You can mount one southpole on the flywheel and one noth pole 180° apart. then the flywheel, rotating over the displacer will pull it up or push it down. And you can use those magnets with a coil to make alternate current for some LEDs to light up :-)
lol, it will either go way too fast over the displacer to have any pulling effect or slow the flywheel too much. And we are talking LTD here, so getting power out of it is not the primary aim, just make it selfrun with the least energy.
You can see the displacer piston moving in the second shot (through the tiny glass window). It is lifted and dropped by a magnet in the bottom of the power piston.
Excellent concept! How about more video from other angles so as to view the profile? Great idea using a motor as a generator with the counterbalance beam in place of a regular flywheel. Looking forward to seeing more.
JoeNieroski 2 years ago
Did you try some test with a mix of Epoxy and graphite powder for your power piston ? To have less friction ( a graphite property ). I make some mix ration test between epoxy and graphite ( 2:1 , 1:1 and 1:2 by volume). It's seem to not altering the property of epoxy with all test a did and friction look like to be less.
PyroEvil 2 years ago
This has been flagged as spam show
That's very Cool
Pyrbel 2 years ago
Comment removed
Pyrbel 2 years ago
What song? Also thats pretty cool stirling
mrcss 2 years ago
Thanks! Music is copyright free stuff from Youtube - my original mp3 soundtrack was rumbled by the Youtube Copyright Engine. :-(
mowerofdoom 2 years ago
what made of????? detail explanation plz/..
camsoju 3 years ago
that is a great idea trying it that way, my hats off to you
1crazyfocker 3 years ago 2
VERY COOL
TOPPPPPPPPPPPP
SWINGREGORY 3 years ago
have you thought of magnetically coupling the piston to the flywheel so that the motor can be sealed completely. No leakage ever... I just can't figure what to do with the gas on the other side of the piston. Maybe a dual chamber design.
That also brings the classic engineer's trick to think reverse. Put the piston on bottom and displacer on top. And then use magnetic repulsion. I'm unfortunatly no expert in sterling, so just throwing ideas around.
Gunstick 4 years ago
Hmmm. How about a diaphragm and a magnetically coupled displacer. It would then be completely sealed.
I've experimented with positive mag coupling and there are some big problems. Magnetic force is inversely proportional to distance squared (some would argue d^4). This means that if you want the coupling to be rigid, high(er) forces are involved to move things.
I think the benefits of good sealing are outweighed by increases in friction.
BUT I may be wrong!
mowerofdoom 4 years ago
Keep on throwing those ideas around though!!
Thanks for the post.
mowerofdoom 4 years ago
here's another idea thrown in. Some people argue that rotation is not the perfect stirling cycle. As magnets are so crazy on repulsion, an idea is to make a loose magnetic coupling and add a "magnetic hill" which will cause the piston to push against a magnetic resistance at first, once overcome it is the forced "downhill". Though it may be the same than connecting the piston with a spring.
assimilateborg 4 years ago
I agree that using rotation to link displacer to piston does not give the perfect cycle. This was the basis of my thoughts for creating VersionI of this engine (the diaplacer snaps up and down [at low speed]).
Using a magnetic 'hill' would halve the forces and it would also be necessary to attract the displacer back up (or repel it back up from its underside) - which is possible .........
mowerofdoom 4 years ago
hi thx for you comment on mi vid.
youre designe is more compact because the magnet is in the powerpiston.theres also less friction... good idea!
whats the temperature of the botten- & underplate? what kind of material did you use for that? and what kind of material did you use for the displacer?
DeveloperX101 4 years ago
When I cannot hold my hand on the bottom, it is hot enough!
Both top and bottom plates are aluminium. The chamber is made from 150mm polypropylene tube and the displacer is just expanded polystyrene.
A small tube is glued through the centre of the displacer. The tube moves up and down a piece of wire which is glued to the bottom plate. This keeps everything centered.
I would like to use your idea to drive the displacer both up and down and maybe produce more rpm.
mowerofdoom 4 years ago
my engine can run on ringbom- or differential stirling engine. because the magnet are not too strong. if the engine runs too fast the magnet will not react, this slow down the engine. its like a speedlimiter...
to run the engine on faster rpm you have to use stronger magnet, but with stronger magnet theres also more friction.
DeveloperX101 4 years ago
I can understand the problems. One way may be to use magnets both sides of the displacer, and a magnet between. N S !
****S!S****
****N!N**** displacer ! !=pin/ringbom piston N S fixed
Moving the top magnet downwards would move the displacer down by half that amount.3 magnets in line should not cause friction(?)
If three STRONG magnets are used I think a big flywheel would be needed because of the large forces as magnets get close.
mowerofdoom 4 years ago
Sorry, bad diagram!
One moving magnet above displacer, one on displacer and one on bottom plate.
Maybe I should build one and post vid!!!
mowerofdoom 4 years ago
you will have the problem that magnets loose their magnetisme when heated. So putting it on bottom plate is difficult. You can mount one southpole on the flywheel and one noth pole 180° apart. then the flywheel, rotating over the displacer will pull it up or push it down. And you can use those magnets with a coil to make alternate current for some LEDs to light up :-)
assimilateborg 4 years ago
lol, it will either go way too fast over the displacer to have any pulling effect or slow the flywheel too much. And we are talking LTD here, so getting power out of it is not the primary aim, just make it selfrun with the least energy.
Gunstick 4 years ago
where did the displacer piston go???
cograilfan 4 years ago
You can see the displacer piston moving in the second shot (through the tiny glass window). It is lifted and dropped by a magnet in the bottom of the power piston.
mowerofdoom 4 years ago