cylinder with rotating stem

[Bolik182]

Good day to all.

My question is whether it is possible to consider that a double-acting hydraulic cylinder can satisfy the rotation of the stem when the pressure is pushed or fired (320 - 350 bar).

I'll explain.

the terminal part of the stem is attached to a rotating table moved by a hydraulic motor, while the rest of the cylinder is totally independent and fixed on another plate.

Whereas the cylinder has a rod of the ø 160 (cable) ø, inside 260 and embossment of the attack on the stem from the head in max aperture of about 750 mm , do you feel unlikely that this cylinder may have hold problems if an arrow resulting from the bending of max 2 cm should be attached on the stem?

Could I have problems with the internal seals?

rotation speed max 10 g/min.

exist seals suitable for turning the stem into a cylinder? ?

thanks to all of the attention.

 

[cacciatorino]

Could I have problems with the internal seals?

rotation speed max 10 g/min.

Maybe it's better to avoid, or just ask the cylinder manufacturer.
Can't you put a braided bearing on the end of the stem?

 

[gerod]

quoto, don't trust the rotational seal. already with the air you have several drawings, if you turn it....

 

[Mario SJPD]

quoto better not to spin the stem in the cylinder if you also have a bending of the stem even worse, alternatively to what proposed you can turn all the cylinder in a solid way by passing the hydraulic connections in a rotating hydraulic distributor,clear the solution should be studied to oc

 

[sampom]

quoto all absolutely!
Would you like the piston/cylinder group to support you? ? : eek::smile:
see to mount the rotating table in the head of the stem with interposition of radial/axial bearings (in some way a ralla..).

apart from any sealing problems (and wear) seals (which could also be solved) the vedrei hard to spin a piston under a thrust of 350bar, especially when arrived at the end of the race.
a hydraulic cylinder is not a bearing, let him do his work (up and down:biggrin.
Surely asking the builders you would find combined solutions "translo/rodent" (with independent stem already mounted on bearings) but I do not know how much it would be worth it.

greetings
Marco:smile:

 

[MFT]

if the cylinder has not yet been built there is the firmhttp://www.fossacilindri.com/htm_it/index.htmthat in the catalog has rotating cylinders and anyway they themselves constructs them also drawing
if it can help you

Mar

 

[Bolik182]

thanks to all of the technical opinions on this.

I will find an alternative solution, as I have footprints for every type of bearing braces.

Thanks again.