[PSUBS-MAILIST] eRe: Alan's new motor

[Alan via Personal_Submersibles]

Hank,
the oil tube is clear, so I'll monitor the oil level in the tube & see if
additional over pressure helps first. Also I have a temperature sensor
in the motor so if the motor runs cool enough I won't worry.
Did you put bearings in the joints of your manipulator, or not bother?
I am still running with the idea of a manipulator with an open gearbox
& underwater motor. I can get ceramic bearings but they are expensive.
Alan 

> On 4/10/2018, at 12:23 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> Alan, all you need is to interrupt the oil pathway, just take a larger container \pipe\ whatever and have the lower tube enter at the bottom of the vessel and have the exiting tube leave on the opposite side above it.  I use this method as a water  trap for my steam engine, under pressure.
> Hank
> 
> On Wednesday, October 3, 2018, 3:39:28 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
> 
> 
> Hank,
> I have the wires running out of the motor through the tube that the
> oil comes in through. At a point in that line I have a T where the wires
> are epoxied & run without the tubing to the through hull, and the tubing
> continues on to the oil compensator. The compensator has a low oil
> level switch, so there should always be oil in the line.
> There is increasing ambient pressure going in to the housing as you 
> dive, so not sure how you would relieve that on ascent with some sort
> of oil trap! But I am not sure what idea you have.
> I am stuck on an Island for 3 weeks looking after a dog & cat then my
> other daughter is flying in & stealing my car, so won't be
> making any rapid progress on this :(. 
> Alan
> 
> 
> 
>> On 4/10/2018, at 9:29 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> Alan,
>> You can make a oil trap in the compensation tube, its real simple.
>> Hank
>> 
>> On Wednesday, October 3, 2018, 12:32:59 PM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>> 
>> 
>> Hank,
>> I am hoping I can dial up the over pressure to the point that it
>> keeps the oil down. (like blowing in to a straw forcing the liquid out)
>> The oil goes in through a clear tube so I can monitor the level.
>> I am not confident though; however oil compensation has been
>> around for a long time. 
>> Unfortunately I can't put a one way valve in the system as the 
>> pressure won't be able to escape on ascent.
>> Below is the motor in oil without the proppeller.
>> Alan
>> <image1.JPG>
>> 
>>> On 4/10/2018, at 1:34 AM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> Alan,
>>> I have had similar situation, the oil will still come up the tube.  The over pressure makes no difference, unless there is a piston or diaphragm blocking the oil.
>>> Hank
>>> 
>>> On Wednesday, October 3, 2018, 2:53:29 AM MDT, Alan via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>> 
>>> 
>>> Hank,
>>> yes very patient "lol" as this might not be the final version.
>>> I have tested the motor out of the housing in a bucket of oil & established
>>> that it could only be run at 30 Amps without overheating. It causes quite 
>>> a turbulence running in oil with no prop on due to the open design of a rotating 
>>> back section. It will want to force oil out of the housing & up the oil feed tube,
>>> but I am hoping the overpressure from my oil compensator will keep the oil
>>> in around the motor. 
>>> Am learning a lot on each attempt.
>>> Alan
>>> 
>>> 
>>> 
>>>> On 3/10/2018, at 9:06 PM, hank pronk via Personal_Submersibles <personal_submersibles at psubs.org> wrote:
>>>> 
>>>> Alan, your patience is amazing.  I would be itching to test it before sending it away for anodizing.  
>>>> Hank
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>>> 
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