[PSUBS-MAILIST] Fw: actuator

Sun Oct 22 19:22:26 EDT 2017

 Hugh,I have to compensate with some means for sure.  I was thinking I could have preset internal pressure but Alan has already scolded me over the idea ;-( .  I was also thinking about oil compensating  but my motors will not like that.  I will likely end up with an air compensation system.  It would be nice if the second stage regulator can keep the internal pressure higher than ambient.  This will help the actuators carry the load of the arm without using up lifting power from the actuator.   Hank    On Sunday, October 22, 2017, 4:46:33 PM MDT, Hugh Fulton via Personal_Submersibles <personal_submersibles at psubs.org> wrote:  

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Hi Hank,

Is the other end of the rod compensated?  i.e. if the rod is say ¾” diameter then 50 lbs is eaten up at 113 psi approx. 250 ft depth.  If it is 5/8” diam then you get to over 350 ft.  Actuators with the shaft out both ends are of course perfectly balanced.  Hugh

From: Personal_Submersibles [mailto:personal_submersibles-bounces at psubs.org] On Behalf Of hank pronk via Personal_Submersibles
Sent: Monday, 23 October 2017 5:32 AM
To: Personal Submersibles General Discussion
Subject: [PSUBS-MAILIST] Fw: actuator

Hi All,

Here is a picture of my first electric liner actuator that is fully submersible.  The actuator can lift 50lbs  at 1 inch per second approximately.  The actuator cost me 50 dollars Canadian to make.  This one has a 4 inch stroke and is well suited for the second sage on the manipulator.    I can either air compensate  or oil compensate the actuator.  I can also put 160 psi inside permanently and use with no compensation to an undetermined depth.  

Hank

----- Forwarded Message -----

From: hank pronk <hankpronk at live.ca>

To: hanker_20032000 at yahoo.ca <hanker_20032000 at yahoo.ca>

Sent: Sunday, October 22, 2017, 10:24:59 AM MDT

Subject: Fw: actuator

From: xxx xxxxx <mp13 at live.ca>
Sent: October 22, 2017 10:23 AM
To: Hendrik
Subject: actuator 

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