[PSUBS-MAILIST] Manipulator arm
hank pronk via Personal_Submersibles
personal_submersibles at psubs.org
Wed Jan 21 20:45:32 EST 2015
If it was my K350, it would have two cue ball arms, one on each side of the front port.
Hank
--------------------------------------------
On Wed, 1/21/15, Sean T Stevenson via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Subject: Re: [PSUBS-MAILIST] Manipulator arm
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Wednesday, January 21, 2015, 8:09 PM
There is another option, which may be a touch more
expensive, but that is to use air-operated valves for the
hydraulic system, which would be mounted outside without an
enclosure and handle whatever hydraulic pressure you want to
operate at, and then supply this pilot air from (relatively)
low pressure solenoid valves inside the pressure boundary.
This way, no oil can get inside in the event of failure,
every air line can have a shutoff at the pressure boundary,
and eg 24 VDC solenoids with small apertures and modest
pressure ratings can be used.
Sean
On January 21, 2015
5:12:40 PM MST, hank pronk via Personal_Submersibles
<personal_submersibles at psubs.org> wrote:
Allan,
There are benefits and draw backs as well. The benefit is
having the valve in the oil. If not then the valve needs an
enclosure around the solenoids filled with oil. It is a
pain in the butt. Next is the membrane lid, that eliminates
the air bag deal. So it just depends what your needs and
expectations are.
Hank
On Wed, 1/21/15, Alan James via Personal_Submersibles
<personal_submersibles at psubs.org> wrote:
Subject: Re: [PSUBS-MAILIST] Manipulator arm
To: "Personal Submersibles General Discussion"
<personal_submersibles at psubs.org>
Received: Wednesday, January 21, 2015, 6:40 PM
Hank,they also
use water hydraulics on the Remora rov.http://www.hydra-cell.com/applications/salt-water-pump.html
I like the
idea of Scott's, of housing the pump & shuttle
valvesin an oil
fi!
lled
enclosure with flexible membrane for
equalization;however I
wonder if there is much advantage. You would still have
tohave
through hulls in that enclosure for hydraulic hoses &
electricalpower
& signals. You would end up with more through hulls
&loose the
ability to manually release pressure from the
systemin an
emergency.Alan
From: hank pronk via
Personal_Submersibles
<personal_submersibles at psubs.org>
To: Personal
Submersibles General Discussion
<personal_submersibles at psubs.org>
Sent:
Thursday, January 22, 2015 12:01 PM
Subject: Re:
[PSUBS-MAILIST] Manipulator arm
Alan,
When I
had my tour of Nuytco, I saw the arms well actually a
shelf
full of them and the valves. I assumed they were
hydraulic, but maybe no!
t. It
could work with sea water,
but fresh water could be problematic with freezing.
Hank
On Wed, 1/21/15, Alan James via
Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
Subject: Re:
[PSUBS-MAILIST] Manipulator arm
To:
"Personal Submersibles General Discussion"
<personal_submersibles at psubs.org>
Received: Wednesday, January 21, 2015, 2:50
PM
Not sure,
but don't the "Deep Workers"
have
a hydraulic
system
using sea water, with externalpump &
valves.Does
anyone know anything about
this?Alan
From:
"swaters at waters-ks.com
via Personal_Submersibles"
<personal_submersibles at psubs.org>
To: Personal
Submersibles General Discussion
<personal_submersibles at psubs.org>
Sent:
Thursday, January 22, 201!
5 4:58
AM
Subject: Re:
[PSUBS-MAILIST] Manipulator
arm
My plan
was to use O ring seal. I am using
a comoensated
system.Thanks,Scott
Waters
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from my U.S.
Cellular® Smartphone
-------- Original message
--------
From: hank pronk
via
Personal_Submersibles
Date:01/21/2015
9:41 AM
(GMT-06:00)
To: Personal
Submersibles General Discussion
Subject:
Re: [PSUBS-MAILIST] Manipulator
arm
Scott,
You
need to decide
on what type of hyd system you are going with
before you dive into cylinders. If you are
going with a
pressure compensated system,
you can use cylinders with a
wiper seals on
the shafts. If you not pressure
compensating, then use cylinders with o-!
ring
seals on the
shafts. I would use o-ring sealed shafts
regardless.
Hank
On Wed, 1/21/15, swaters at waters-ks.com
via
Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
Subject: Re:
[PSUBS-MAILIST]
Manipulator arm
To: "Personal
Submersibles General Discussion"
<personal_submersibles at psubs.org>
Received: Wednesday, January
21, 2015, 8:25 AM
Gotcha.
I
got about 8
different suppliers I have found so far with
SS cylinders. I think I'll order a few
to
play with. I
am also
planning on using
electric silionoids
for
controlling the
valves.Thanks,Scott
Waters
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from my U.S.
Cellular®
Smartphone
-------- Orig!
inal
message --------
From:
hank pronk via
Personal_Submersibles
Date:01/21/2015 6:54 AM (GMT-06:00)
To: Personal Submersibles General
Discussion
Subject: Re:
[PSUBS-MAILIST] Manipulator arm
Scott,
Gamma uses air
cylinders with
hydraulic fluid and
pump. The hydraulic
system is very standard except it
uses
air
cylinders in place of hydraulic
cylinders.
Hank
On Tue, 1/20/15, swaters at waters-ks.com
via
Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
Subject:
Re:
[PSUBS-MAILIST] Manipulator arm
To:
"Personal
Submersibles General Discussion"
<personal_submersibles at psubs.org>
Received: Tuesday, Jan!
uary 20,
2015,
10:27
PM
Is Gamma all air
cylinders? Do you just
use
a air compressor? What happens to the
air once it is in
the
cylinder and you want to lower the
cylinder? Is it
recompressed or somehow
expelled? I really
don't know
crap about pnematics.
Haha. Why do all the subs use
hydrolics
and not air. For example
hydro-lek?Thanks,Scott
Waters
Sent
from my U.S. Cellular® Smartphone
-------- Original message --------
From: hank pronk via
Personal_Submersibles
Date:01/20/2015 9:06 PM (GMT-06:00)
To: Personal Submersibles General
Discussion
Subject:
Re:
[PSUBS-MAILIST] Manipulator arm
Scott,
Not sure why you want hydraulic
cylinders.
You want
air cylinders, they are light
weight and
all
aluminum.
If
you use 2 in bore air cylinders you can
run
on a 500
psi
system. Also air cylinders typically have
5/8 rods
and
that is
the most
important part. The rod size
is
what
the water
pressure is pushing back against
you
system.
Air
cylinders have a single o ring on the piston
and are
cheap and easy to replace. If
you want ss
rods then just
replace the chrome rods
when they wear
out. I made
my
own
rods for Gamma, easy peezy.
Hank
On Tue, 1/20/15, swaters at waters-ks.com
via
Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
Subject: Re:
[PSUBS-MAILIST] Manipulator
arm
To:
"Personal Submersibles General
Discussion"
<personal_submersibles at psubs.org>
Received: Tuesday,
January 20, 2015, 8:52 PM
Hydrolic.
Also what
size bore does yoursub have
Hank?Thanks,Scott Waters
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from
my
U.S. Cellular® Smartphone
-------- Original
message --------
From: hank pronk
via
Personal_Submersibles
Date:01/20/2015 7:34
PM (GMT-06:00)
To:
Personal Submersibles General Discussion
Subject: Re: [PSUBS-MAILIST]
Manipulator
arm
!
Are you using
hydraulic cylinders or air
cylinders.
Hank
On Tue, 1/20/15, swaters at waters-ks.com
via
Personal_Submersibles
<personal_submersibles at psubs.org>
wrote:
Subject:
[PSUBS-MAILIST] Manipulator
arm
To:
"psubs"
<personal_submersibles at psubs.org>
Received: Tuesday,
January 20, 2015, 7:51 PM
Does
anyone have
a reccomendation on a source
for
hydrolic
cylinders? Ofcourse there are tons online,
just
wondering
if
someone has a particular place
they like
to get
them.Thanks,Scott Waters
Sent
from my U.S.
Cellular®
Smartphone
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