×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Deaeration devices for Hydraulic Oil

Deaeration devices for Hydraulic Oil

Deaeration devices for Hydraulic Oil

(OP)
hi people,

i would like to know what is available to deaerate the hydraulic oil in the tank.

We want to remove air bubbles.

In the past we have seen centrifugal type devices (but I can not find any info now) or special deflector and meshes to built in the tank to remove air bubles,....

Anyone that could provide more info on commercial or homemade devices?



Thanks in advance,



jarel

RE: Deaeration devices for Hydraulic Oil

Check with Parker Hannifin. I know thy have these devices. Any local hydraulic company should be able to help you, too.

RE: Deaeration devices for Hydraulic Oil

I have seen centrifugal forces used on dry sump race engines. The reservoir is designed as an upright cylinder with a conical bottom. The return flow enters so that it spins around the perimeter of the reservoir, which helps get the air out.

Check out the Moroso web page for a picture.
http://www.moroso.com/catalog/categorydisplay.asp?catcode=15201

ISZ

RE: Deaeration devices for Hydraulic Oil

Where are the air bubbles coming from?  Make sure your oil returns are all below the oil level, that will help minimize entrainment.

RE: Deaeration devices for Hydraulic Oil

jarel,

A few years ago we had a Voith hydraulic coupling running at about 2500 HP and 3000 rpm output, 3300 rpm input, (300 rpm slip).  The coupling was used in a helicopter regenerative test cell testing engines and transmissions.  Oil is pumped into the coupling at maybe 400 gpm, taken out of the coupling with a scoop tube whch regulates the "centrifugal ring of oil.  With the oil coming out of the scoop tube is a lot of air. Then the oil is returned to the reservior and oil cooler.  Initially, we had a big problem with oil coming back to the tank with large quantities of air, foaming the tank.

We increased the size and number of vents to the tank. Our solution was to introduce the oil onto a sloping stainless plate which was arranged across the resivoir (above the liquid level) and that was only partially effective.  When we added stainless steel expanded metal laying in the sloping return oil, on top of the sloping plate and the problem went away.  We think the reason that it worked was that the expanded metal caused the laminar oil movement to "flip over" bringing the air bubbles to the surface.

The best thing you can do if possible is to try to identify the source of the foaming and try to remove the problem before it gets to the tank.  In the above example we could not figure out how to change the nature of the scoop tube.  

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - What is Generative Design and Why Do You Need It?
Engineers are being asked to produce more sophisticated designs under a perfect storm of complexity, cost, and change management pressures. Generative design empowers automotive design teams to navigate this storm by employing automation, data re-use and synchronization, and framing design in the context of a full vehicle platform. Download Now
eBook - Simulation-Driven Design with SOLIDWORKS
Simulation-driven design can reduce the time and cost of product development. In this engineering.com eBook, we’ll explore how SOLIDWORKS users can access simulation-driven design through the SOLIDWORKS Simulation suite of analysis tools. Download Now
eBook - Integrating the Engineering Ecosystem
Aras Innovator provides multiple options for integrating data between systems, depending on the scenario. Utilizing the right approach to meet specific business requirements is vital. These needs range from authoring tools, federating data from various and dissimilar databases, and triggering processes and workflows. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close