[PSUBS-MAILIST] Lip seal
hank pronk via Personal_Submersibles
personal_submersibles at psubs.org
Wed May 20 19:25:38 EDT 2015
Alan,
The compensation bladder (hose) will squeeze and force the wedge tight or rather keep it the same as the water pressure. The spring is still creating the seal. Inside and outside are the same as if it were not even under water. I think :-)
Hank--------------------------------------------
On Wed, 5/20/15, Alan James via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
Subject: Re: [PSUBS-MAILIST] Lip seal
To: "Personal Submersibles General Discussion" <personal_submersibles at psubs.org>
Received: Wednesday, May 20, 2015, 5:49 PM
While on
the motor subject; a simple low pressure lip seal as below
(substitute air side with water side)will be
pressure compensated in a compensated motor! Is this
correct?In oil
compensation there will be oil pushing on the wedged shape
of thelips
mating surface, from one direction & water from the
other. Eventuallythe
pressure from both sides would lift the seal against
it's spring pressure,but
because of the recess above the spring that the oil gets in
to, it willmaintain
the same pressure above ambient on the shaft throughout the
depth changes.Alan
From: Alan James via
Personal_Submersibles
<personal_submersibles at psubs.org>
To: Personal
Submersibles General Discussion
<personal_submersibles at psubs.org>
Sent:
Thursday, May 21, 2015 9:17 AM
Subject: Re:
[PSUBS-MAILIST] MK101 oil compensation tap
Cliff,how are
you compensating for oil expansion due to heat with the KISS
method.Are you
just drilling holes in the housing & using
tube?Alan
From: Clifford Redus
via Personal_Submersibles
<personal_submersibles at psubs.org>
To: Personal
Submersibles General Discussion
<personal_submersibles at psubs.org>
Sent:
Thursday, May 21, 2015 8:43 AM
Subject: Re:
[PSUBS-MAILIST] MK101 oil compensation tap
Actually
in the spirit of KISS, I am going to start out using oil
pressure compensation. If I run into any issues, I will
look at using the air or this hybrid of oil and air with a
regulator.
Cliff
Redus
On May 20, 2015, at 2:30 PM, Alan James via
Personal_Submersibles <personal_submersibles at psubs.org>
wrote:
Jon,the
alternative is to follow Hugh's idea that Cliff is using
& I am going to test out,& put
a regulator in the system that is set it to around
4psi internal overpressure. This
means you can fill with oil & not worry about getting
everylast drop
going in, or drilling the housing. You will also be able to
run it air compensated. There is
the safety feature that if you leak oil there is plenty of
air to replace it.Cliff
already has the parts sorted, just put your order
in:)Alan
From: Jon Wallace via
Personal_Submersibles <personal_submersibles at psubs.org>
To: Personal
Submersibles General Discussion <personal_submersibles at psubs.org>
Sent: Thursday, May 21,
2015 5:47 AM
Subject: Re:
[PSUBS-MAILIST] MK101 oil compensation tap
How important is it to get
every last air bubble out? Surely a fraction
of the total volume is not going to result in
catastrophic failure of
the motor housing,
is it?
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