magnetic piston engine three times

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quartz
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by quartz » 12/08/08, 01:34

Hello everybody :D

Good Taramop, I'm going to watch this for the software,

A + + +
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Marcel2940
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by Marcel2940 » 14/08/08, 22:21

And if you use the air pressure in the pistons: no need for a spring, and if you use an electronic system it will be immune to magnetic interference.
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by taramop » 15/08/08, 13:33

Hi marcel
a compressed air system to move the shutters : Shock: interesting idea : Idea:
I don't really see how to do it yet but interesting : Shock:
on the other hand it implies that the cylinder pistons are waterproof and I am afraid that it eats a lot of performance : Cry:
already that it should not be terrible? : Evil: :?:
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by Marcel2940 » 15/08/08, 15:41

If I understand correctly the performance is due to the power of the magnets, and I am stumbling upon this forum here: http://forums.futura-sciences.com/thread45397.html. The more powerful the magnet, the higher the efficiency. I realize that if we use the pressure of the pistons it would make lose a lot of efficiency but if you wanted to use a Hall effect sensor it will surely be disturbed by magnetic interference ( and there must be). It will put all the electronics aside, and it has fairly precise pressure sensors that do not require a lot of pressure. Or even a valve that will press a switch.
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by harry ravi » 15/08/08, 22:22

A spring on one side of the shutter and a system limiting friction between the shutter and its displacer (of the ball bearing type).

Or a shutter pierced on both ends

A go from the shutter will correspond to a return of the pistons, it suffices to adapt this cycle to the pistons.

Since your shutter is only 5mm thick, it shouldn’t eat too much power on the pistons
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by taramop » 16/08/08, 12:39

Hi everybody

To answer you marcel:
Yes the magnets which will be on the head of the pistons will be quite powerful (the piston has a dia of 40mm for the moment but it can evolve towards a dia 60)
when you look at a magnet reference in this style
http://www.supermagnete.de/fre/more_pic ... 60-06-30-N
when you see the force it gives off (approx 124kg in contact with a steel plate) you can imagine what could be the repulsion between two magnets : Cheesy: .
After all the rest of the design must follow from the choice of magnets :frown: .
- piston stroke between top and bottom dead center (the intensity of the repulsion decreasing with the square of the distance if my memories are not too bad)
(maximum repulsion in pm high and minimum in pm low)
-dimensioning of the crankshaft to recover this force : Shock:
-thickness of the shutter (depending on the material) :?:
-magnetic insulation of the cylinders between them to avoid any interaction between a piston which goes up and the other which goes down :?:

After the concept, for the moment the shutter cam is actuated by the two crankshafts. But it can also evolve.

for harry:
yes in the simulation video that I made the shutters are brought by a virtual spring against the cams.
It is obvious that micro ball bearings will take the place of spokes on the shutters (too difficult to do for the simulation)

After that I have to succeed in simulating the PC with the softs that are going well, the effort it takes to extract the shutter that will be between the two magnets and all the magnetic stress and force that it can generate on the model according to the materials chosen (I was given a little software for that (again thank you Bruno) but for the moment I can't get him to calculate many things)

basically there is still work to go to a prototype : Lol: .
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by harry ravi » 18/08/08, 12:31

I see that you use solid works where a software of the kind, that means that you must be adept at technical drawing see even machineries of manufacture of objects.

How do you go from a solid works design to the production of the machine part?
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by taramop » 18/08/08, 13:45

Hi everybody

To answer you harry I have absolutely no idea how to go from 3D model to a program for numerical control :?: :?: .I think it should go through a special 3d machining software : Lol: , but I am well placed to ask for help in my box (aeronautical S / T)
I must admit that I haven't owned the question yet : Lol: .

But considering the parts for the moment I think that with a good 2d drawing and a good conventional milling machine it must be able to do this :D . (except the cams can be : Evil: ).

Otherwise the software is good SW
I finally managed to make Bruno's little software work : Mrgreen: but for the moment I'm getting started, so no results :x
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by Tagor » 24/08/08, 19:06

Hello

have you ever seen this stephan hartmann video?

http://video.google.de/videoplay?docid= ... 3936115731
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by Capt_Maloche » 28/08/08, 00:06

ACH! Che does not like when there is a battery on a surunit machine

to return to the "magnetic" piston motor, a mechanical spring system could very well compensate for the forces required for the movement of the "shutters"

by the way, did you take the test that I suggested 2 pages above?
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