Actuator Design game-changer

[michael0456]

Hi all.

To begin, we all know that in a typical cylinder for example, the pressurized area inside the barrel far exceeds the axial. Once the stroke of a cylinder exceeds 1/4 the diameter, the radial (wasted) forces equal the linear ('used') forces generated.

Subsequently, I had the idea to keep cylinder ends stationary, and to find some ways to expand the cylinder wall so to speak.

I have done some preliminary work in this area (attached), and in looking at what happens to the volume of fluid itself reveals quite a few incredible things, and opens up a very large rabbit hole in actuator design, pump design, even to propulsion & combustion chambers & the like.

Anyway, I began an article for a cylinder that emulates a muscle (as I see them functioning anyway), but this change in paradigm sent me on too many tangents.

Subsequently, please bear in mind the attached article is unfinished (is Pt 1), and is an incomplete rough draft. It's also just in wordpad, a simple program on a simple computer. please forgive any errors in presentation.

I hope you find the concepts as interesting as I did. This article is free issue.

be well all, happy designing

 

[IRstuff]

There is no "wasted" force against the cylinder wall, because it does not move, so no work is done, so no energy is expended.

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

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[michael0456]

whatever you say - this doesn't change the fact the pressurized area on the barrel wall far exceeds the axial pressurized area on the piston. And just because something doesn't move, doesn't mean it isn't stressed. In this sense, yes, it's entirely 'wasted'.

 

[IRstuff]

So, for something that hasn't been much of a problem in nearly 200 years, you propose to make the walls actually move, which decreases the alleged stress? And add complexity, a truckload of additional seaks, and volume?

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

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[michael0456]

<facepalm>

The current state of industrial hydraulics & pneumatics utilizes actuators that aren't being used to their full capacity, or not even being used efficiently.