Hydraulics - does this circuit work?

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SUMMARY

The hydraulic circuit designed for a double-acting hydraulic cylinder is confirmed to function correctly, as stated by experienced users in the forum. The circuit allows the pump to operate through the hydraulic control valve (RV) during each cycle, which is standard practice for hydraulic systems. Concerns regarding the pump's performance and potential overheating of the motor are addressed, with reassurance that a properly sized bypass or regulator will mitigate these issues. Overall, the circuit is deemed effective for its intended use.

PREREQUISITES
  • Understanding of hydraulic systems and components, specifically double-acting cylinders.
  • Familiarity with hydraulic control valves (RV) and their operation.
  • Knowledge of pump sizing and motor load management in hydraulic applications.
  • Basic principles of fluid dynamics as they relate to hydraulic circuits.
NEXT STEPS
  • Research hydraulic control valve (RV) specifications and selection criteria.
  • Learn about sizing and configuring bypass and regulator systems in hydraulic circuits.
  • Explore best practices for managing motor loads in hydraulic applications to prevent overheating.
  • Study the principles of fluid dynamics to enhance understanding of hydraulic system performance.
USEFUL FOR

Engineers, hydraulic system designers, and technicians involved in the design and maintenance of hydraulic machinery will benefit from this discussion.

brewnog
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Hello there,

I have designed a machine which requires a double-acting hydraulic cylinder. I need someone to let me know if this attached circuit works, if not why not, and whether there is a better way of doing it! The fluid will return to tank for about two thirds of the time the machine is switched on. Will my pump be happy? Do I need a reasonable load so that my motor does not turn into a massive 30kW electric heater? Help on this circuit would be much appreciated!

Thanks in advance
 

Attachments

  • hydraulic circuit 1.GIF
    hydraulic circuit 1.GIF
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The symbols are unfamiliar to me, but... knowing you, it probably won't work. Cat did hire your for your looks, right? :-p
 
looks like a cartoon character :P
 
Pengwuino said:
looks like a cartoon character :P
Yeah. I'm not sure what that big eyeball is looking at, but it certainly seems intent.
 
rofl yah, i immediately thought "whos eyeball is that"
 
Hey Brewnog, I don't see a problem with this circuit. Most hydraulic RV's are designed to be able to handle constant use (unlike gasseous ones) so having the pump go through the RV on every cycle is fine. If you have any concerns, I'm sure the folks selling the equipment can take a look for you, but from the little I know it's fine as is.
 
Q_Goest said:
Hey Brewnog, I don't see a problem with this circuit. Most hydraulic RV's are designed to be able to handle constant use (unlike gasseous ones) so having the pump go through the RV on every cycle is fine. If you have any concerns, I'm sure the folks selling the equipment can take a look for you, but from the little I know it's fine as is.

Oh god, that's like when some people throw a bucket of paint on the wall and start interpretting the 'art' of it and I am just sitting there crying because i don't know what there talking about.
 
I strongly suspect that Mr. Goest didn't note the time differential between the original post and my response to it. :biggrin:

HAPPY ANNIVERSARY, BREWSKI! :smile:
11th, that is. I just had to do it now so that nobody pre-empts me.
 
Last edited:
Ahhhh, so you were waiting the entire year before you all answered my question! :smile:

As you can see, art isn't my strong point. However, the circuit was all good, a real engineer told me so!
 
  • #10
I strongly suspect that Mr. Goest didn't note the time differential between the original post and my response to it.
LOL, yep! My eyes never wandered onto that detail.

Looks like the OP kept well though, didn't get all stinky and rotton yet.

- And look! There's Brewnog, still under the same tree and rousing from his sleep! Perhaps he needs a shave and a cold beer, but it seems his mind is still sharp as ever.
 
  • #11
brewnog said:
Ahhhh, so you were waiting the entire year before you all answered my question! :smile:
Hey, I've only been here since February. It's not my fault that everyone else ignored you for 6 months before that. As for me, I just found the thread whilst wandering about aimlessly.
 
  • #12
Danger said:
Hey, I've only been here since February. It's not my fault that everyone else ignored you for 6 months before that. As for me, I just found the thread whilst wandering about aimlessly.


Slightly ironic really. I came here originally looking for some help. I didn't get any, but instead got sucked in and ended up being a helper-outer instead. Oh well.
 
  • #13
brewnog said:
I came here originally looking for some help. I didn't get any, but instead got sucked in and ended up being a helper-outer instead.
I'm familiar with the concept. I came looking for help, didn't get any, ran into you instead, and ended up being a general pain-in-the-ass. I guess we all find our niche. :biggrin:
 
  • #14
Well, if it's any consolation Brews...it should work fine. Just make sure your bypass/regulator is sized sufficiently.

How's that?
 

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