Subject:
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Re: What the? Hydraulics
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Newsgroups:
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lugnet.technic
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Date:
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Wed, 23 Nov 2005 17:33:13 GMT
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Viewed:
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7657 times
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In lugnet.technic, danny staple <orionrobots@gmail.com> wrote:
>
> Vineet, if I have been following the threads properly- the
> breakthrough that may allow the use of hydraulics with Lego penumatic
> components is the set up which takes out the implicit forth port so
> you dont get squirting oil from your creations. It is bulky at
> present- but a good start. It is at current being used for interesting
> and sophisticated pneumatic circuits using vacuum as well as
> compression.
> --
> Danny Staple MBCS
> OrionRobots
> http://orionrobots.co.uk
> (Full contact details available through website)
>
>
> On 23/11/05, Kevin L. Clague <kevin_clague@yahoo.com> wrote:
> > In lugnet.technic, Vineet Honkan wrote:
> > > Kevin Clague-
> > >
> > > How can a lego pneumatic do hydraulic work? If I'm not much mistaken,
> > > hydraulics
> > > and pneumatics use two diferent sources of power.
> >
> > Hydraulics and pneumatics are similar.
> >
> > Pneumatics uses air, which is a gas and can be compressed. Air pressure
> > difference is what makes pneumatics work.
> >
> > Hydraulics uses fluids which compresses a little, but not much compared to
> > gasses.
> >
> > Both use pistons/rams hoses, and valves.
> >
> > Hydraulics are typically stronger.
> >
> > Kevin
One question I have is related to the construction of the first generation of
the Lego pneumatic system that had 2 ports for each piston (circa-1989).
I had a piston from a 1989 pneumatic universal set in which I tried to put
water in them to make it a hydraulic system. The valve broke either from the
pressure on it or because I'm a moron. The piston failed to work too, So I had
to take it apart (which is basically like crossing the Rublicon). The stopper
(what's that thing called again?) had come off the piston rod. I discovered
that it was 100% rubber and could come off if it the hole for the piston rod is
stretched open wide enough.
Wouldn't adding hydraulic fluid/water to Lego pneumatics damage them? Or were
the parts I had in 1989 very different than today's pneumatic pieces. I do not
wish to take apart one of my new ones since they are a valuable asset to my
construction fleet, and doing so would be like crossing the Rublicon.
Also, if the top of a large Lego piston pump was submerged in the fluid- would
that make the system a closed one? I always thought the difference between
pneumatics and hydraulics is that pneumatics is generally an open system (since
there is always an abundance of air) and hydraulics is generally a closed system
(since hydraulic fluid is not in as great an abundance and would definately not
be as safe to breathe in.
Nathan
> >
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Message has 1 Reply:
 | | Re: What the? Hydraulics
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| (...) FYI: The first LEGO pneumatics system had single ported pistons. Also the only difference between pump and piston was that the pump had return springs. Here is the 60mm version of the original pneumatic single ported system. (URL) bricklink (...) (19 years ago, 23-Nov-05, to lugnet.technic)
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Message is in Reply To:
| | Re: What the? Hydraulics
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| Vineet, if I have been following the threads properly- the breakthrough that may allow the use of hydraulics with Lego penumatic components is the set up which takes out the implicit forth port so you dont get squirting oil from your creations. It (...) (19 years ago, 23-Nov-05, to lugnet.technic)
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