pneumatic rotating seals

[asblo]

Good morning to all
I wanted to submit a scheme in which I would like to use two rotating seals on a tree to create a compressed air channel that follows the path indicated by the arrows. I would normally put a rotating joint where the "tap" is placed, but I need to reduce the footprint.
you have indications about the type of rotating seals and how to dispose them (orientation, shoulders..) I couldn't find anything for pneumatic applications between the catalogs of the manufacturers.
p.s. do not look after the bearings, I have not yet drawn the axial locks, I have only placed them where they have to stay

 

[Esselle]

Good morning, I usually have o-rings on the hub exactly where you put the seals.

 

[cacciatorino]

you could use so-called energized seals, see as prp or angst-pfister manufacturers. Then it also depends on pressure and peripheral speed, and tolerance to transudations.

 

[cacciatorino]

Good morning to all
I wanted to submit a scheme in which I would like to use two rotating seals on a tree to create a compressed air channel that follows the path indicated by the arrows. I would normally put a rotating joint where the "tap" is placed, but I need to reduce the footprint.
you have indications about the type of rotating seals and how to dispose them (orientation, shoulders..) I couldn't find anything for pneumatic applications between the catalogs of the manufacturers.
p.s. do not look after the bearings, I have not yet drawn the axial locks, I have only placed them where they have to stay

ah one thing: consider putting tempered bushings where you press the oil lip (or in sub-order to make tempra + grinding on the tree), because both of the spring and fluid pressure you will find yourself in a short time with the worn shaft. Consider that with the air you work practically dry, already if it were oil a little lubrication you would.

 

[asblo]

very helpful thanks

 

[paulpaul]

years ago I had made a solution similar to your (I didn't have air but natural gas at very low pressure, about 0.5 bar) using din3760 (classic oil similar to those you put): they are not exactly designed for the application but they worked well. to check the crawling speeds.
I had not hardened the tree (which is correct) but used speedisleeves of the skf as " sacrificial element".

 

[Dum]

Hi.
I don't know how useful you can be, I think they are "similar but different" solutions.
I had solved this way a couple of years ago with simple oring.
the hardened and cemented tree and the element you see in bronze is bronze
rotation speeds are low and we work with pressure on the 5bars.
in this case I managed both power supply and discharge.

So far no one has yet called me to breakfast to eat the pieces that don't work.
Look at you like I just pulled it myself. .

 

[Esselle]

Hi.
I don't know how useful you can be, I think they are "similar but different" solutions.
I had solved this way a couple of years ago with simple oring.
the hardened and cemented tree and the element you see in bronze is bronze
rotation speeds are low and we work with pressure on the 5bars.
in this case I managed both power supply and discharge.

So far no one has yet called me to breakfast to eat the pieces that don't work.
Look at you like I just pulled it myself. .

View attachment 69305

Yes, I confirm it is exactly my same solution with pressure 7 bar and 15 g/1'

 

[asblo]

have you avoided the parasols for the matter of encumbrance? by curiosity, is it a head that turns with intermictor? what type of products do you do?

Hi.
I don't know how useful you can be, I think they are "similar but different" solutions.
I had solved this way a couple of years ago with simple oring.
the hardened and cemented tree and the element you see in bronze is bronze
rotation speeds are low and we work with pressure on the 5bars.
in this case I managed both power supply and discharge.

So far no one has yet called me to breakfast to eat the pieces that don't work.
Look at you like I just pulled it myself. .

View attachment 69305

 

[Dum]

have you avoided the parasols for the matter of encumbrance? by curiosity, is it a head that turns with intermictor? what type of products do you do?

hi, yes I avoided them both for reasons of encumbrance and because it seemed functional with simple or.
It is a relatively heavy-duty head (about 60kg) under a percussion marker, so it works "at a step of character. .

 

[Cadinpiedi]

you could use so-called energized seals, see as prp or angst-pfister manufacturers. Then it also depends on pressure and peripheral speed, and tolerance to transudations.
View attachment 69303

similar type of trelleborg,
on their site and on 3dfind.it find the 3d models in various formats.
also for these it is necessary a hardened surface with hrc min. 60

 

[molix]

among the many valid solutions already said estimates also xring