telescopic cylinder work surface

[soliman.k]

Good morning, gentlemen.
I need help, I'm designing a telescopic ciloindro and I would like to understand what the surface on which I have to do my calculations for pressure in various stages, I attach the pattern of the cylinder that itendo, a dive version and the other not dive,
If you can explain to me and point the surface up here, the pressure in the various stages.
Thank you in advance.

 

[TETRASTORE]

waiting for further suggestions look at this discussion: multistage hydraulic cylinder dive.

 

[biz]

you will have to take every single portion of surface, as by definition the force calculations by multiplying the pressure by. By integrating, you must consider the whole surface, as a sum of the various portions of surface.

 

[Kaji]

I apologize if I appear antipathic, especially given my little knowledge of the subject, but if you have doubts of this type already starting the design, especially if it will be followed by an actual material realization, of a telescopic cylinder can be very complicated.
personally I have worked for years in a company that has always designed and built the hydraulic cylinders, but the telescopic ones made them do to those who specialized in it.
especially those with double effect can be extremely complicated from the point of view of manufacture for seals and to bring the oil on the "saw" side.
if instead in your case the telescopic cylinder is simpler can be easier.

 

[meccanicamg]

the company moris produces telescopic cylinders for lifting. search the pdf network and find many explanations....and designs of standard products that they make.
I'll put a picture of their manual.
is freely downloadable from their site.