sizing pipe diameter

[volaff]

Hello everyone, it is the first time I write in this section but not the first in the forum.

I'm a mechanical engineering student that Tuesdays I have to support the writing of the oleodynamic and pneumatic examination.

I have a question maybe a little stupid but not having followed the course I have a big doubt.

I attach the exam track and the relative solution I have made (please that the exercise is of examination but there was a block already carried out of exercises that the prof recommended) but without the attached catalogs for which I improvised.

to here everything more or less well.
the problem arises when, speaking with a friend, he told me that at the examination the prof also wants the sizing of the suction tube and sent.

I don't know how to do it. I suppose a given type of flow and pressure should be provided, but then? ?
I know that at the esmae the prof from also tube catalogs but how do I use them?

Can someone help me?

Thank you very much in advance

 

[meccanicamg]

I watched everything. the solution you did is correct even if a little twisted because you made several attempts that instead it was enough to use practical formulas with corrective factors (see attachment).

for sizing pipes/section pipe in/out pump I would say that you have to follow the calculation of load losses at turbulent regimen or laminar motion depending on the characteristics of the fluid (viscosity oil at its operating temperature). I attach you to the rulers to determine the section of the pipe and the losses.

I suggest you take fluid power engineering - m. galal rabie - mcgrew hill that really explained everything and is very good as a hydraulic design manual.

 

[volaff]

the case of the lower displacement I did just to highlight the fact that it must necessarily use a cylinder greater than that coming out of the calculation, or change hydraulic motor.

cmq thanks a thousand of the answer, I think that those are monograms (I think they are called so) to calculate the section of the tube under examination, although at the course we have never seen them!! !



See you soon.

 

[meccanicamg]

the case of the lower displacement I did just to highlight the fact that it must necessarily use a cylinder greater than that coming out of the calculation, or change hydraulic motor.

cmq thanks a thousand of the answer, I think that those are monograms (I think they are called so) to calculate the section of the tube under examination, although at the course we have never seen them!! !



See you soon.

but you have to choose the upper displacement and possibly partialize it as a flow rate with a specific flow regulator.

Yes, they are monograms for tube size.

 

[volaff]

thank you very much for the answer!! very kind..... something more I understand....