[PSUBS-MAILIST] Lip seal

[Alan James via Personal_Submersibles]

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?



_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


   

_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


   
_______________________________________________
Personal_Submersibles mailing list
Personal_Submersibles at psubs.org
http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles


  
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.whoweb.com/pipermail/personal_submersibles/attachments/20150520/ec2778f5/attachment.html>