- #1
Stormer
- 117
- 22
I have seen seals in the form of multiple grooves in a shaft with no other sealing element like o-rings etc. in many applications. For example i have seen this in hydraulic spool valves, but also in high pressure and high temperature gas applications like on pistons in gas operated firearms.
My question is does this really make a good seal? And how does it really work? Does it work in the same way as a Tesla Valvular Conduit by making the flow turn around in the grooves and make greater resistance to any further flow?
Hydraulic spool valve spool:
AK47 piston:
And why is it used in hydraulic applications? Why not just a o-ring? I can understand it in firearm pistons because the hot gasses will probably destroy a o-ring in the first shot, but in hydraulics i don't understand the reason to use this. Or is there some piston rings in the grooves of the hydraulic spool valves that we just don't see?
My question is does this really make a good seal? And how does it really work? Does it work in the same way as a Tesla Valvular Conduit by making the flow turn around in the grooves and make greater resistance to any further flow?
Hydraulic spool valve spool:
AK47 piston:
And why is it used in hydraulic applications? Why not just a o-ring? I can understand it in firearm pistons because the hot gasses will probably destroy a o-ring in the first shot, but in hydraulics i don't understand the reason to use this. Or is there some piston rings in the grooves of the hydraulic spool valves that we just don't see?