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


Regenerative hydraulic circuit

Regenerative hydraulic circuit

Regenerative hydraulic circuit

Looking for circuit examples of regenerative hydraulic circuits involving single acting cylinders. Have multiple lift cylinders that need to dynamically level a platform and would like to route oil from collapsing cylinders to cylinders needing to extend.

RE: Regenerative hydraulic circuit

What you are asking for is not considered a Regeneration circuit. You can see Regeneration corcuit examples here:
http://www.hydraulicspneumatics.com/200/eBooks/ Look in the Fluid Power Basic link at Ch. 15 pg. 15-13 Fig's. 15-18 & 19.

I would call it a Transfer circuit and oil would only transfer from higher to lower pressure condition. Usually that requires an elevated pressure difference between the units (200-500 PSI) unless there is minutes to hours for the transfer to take place.

Bud Trinkel, Fluid Power Consultant

RE: Regenerative hydraulic circuit

Regen circuits by nature convert a double acting cylinder into a single acting cylinder when extending and use the rod area only as a force area, not the piston area.

I think you are looking for some type of flow divider circuit to keep the cylinders in parrallel when extending or retracting.  The key here is how much tolerance for inaccuracy do you have.  The more accuracy you need the more expensive this stuff gets. All the way up to feedback control circuits.

You can use a gear type flow divider which will divide and combine flows as the cylinders go out/in.  Accuracy 90% ?
Have to be carefull with pressure intensification and must put reliefs between divider and cylinders.  Also will have a problem with oil equalizing path of least resistance when cylinders are extended and loaded without some type of holding valve.  You now have to release the holding valve to lower the cylinders.  Gets complicated.

You could also try Some of Sun's Flow Divider combiners.  They have load holding capability and pretty good accuracy depending on the flow rate you push through them.  May eliminate need for load holding valves.

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


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