×
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!

*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

Impossible pump requirements?

Impossible pump requirements?

Impossible pump requirements?

(OP)
Is there a way to get 1500psi of hyraulic fluid at a flowrate of 2400 gpm into a cylinder without having 2000 hp pump. Someone suggested having an air over fluid reserve and pumping the air to force out the fluid. Also if anyone knows of pump manufacturer who can pump 2400 gpm of hydraulic fluid at 1500psi let me know. Thanks.

RE: Impossible pump requirements?

This flow and pressure work out to 2100 hp.
End of discussion.

RE: Impossible pump requirements?

Sure,
Use a 2000 HP motor and not a 2000 hp pump.

HP=gpm x delta psi x .00058 = 2088 hp.

Note: this is not taking into consideration the motor/pump efficiency, it is the hydraulic hp.

RE: Impossible pump requirements?

......and as for air over fluid, it all depends on how many gallons you want to push into your cylinder in one go, and how quickly you want to do that again (duty cycle), but I'm guessing that you might be (more than) slightly shocked by the size of compression package required and also your reservoir.

RE: Impossible pump requirements?

IMO, amongst others, make three screw pumps which will meet your duty.For intermittent duty, air over oil is normally the way to go.
Many hydro turbines use air over oil to drive the servomotors (big rams) that close the wicket gates. This decouples the instantaneous servomotor power requirement from the pump rating. The main reason in this application is to ensure the wicket gates can still be closed if the pump or its power supply fail. However the principle is still the same.
If your duty is continuous then obviously the pump hydraulic power must exceed the cylinder demand.

Cheers

Steve

RE: Impossible pump requirements?

I posted a question in engine and fuel engineering:
Thread71-84432 there off the self hydraulic pumps capable of producing a load of 1000-2000hp and spin at 8000-10000 rpm or would they have to be geared slower?
Thanks,

Tim

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

The Low-Code Digital Transformation Guide
Change the way you develop apps and, in turn, change the way your business operates and engages with customers, leading to new channels of revenue. This ebook is the culmination of 14 years of experience with 4,000 customers that have all transformed their business through low-code development. 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