triangular seal without gland
triangular seal without gland
(OP)
I have 2 housings. One housing has a seal pressed into it, to seal a shaft that goes through both housings. Sealing between the housings is done by an o-ring, compressed between the two housings. This causes me problems in assembly, as this o-ring often gets cut or damaged when the two housings are brought together.
Since I have a machined face opposite the shaft seal, in the other housing, I am thinking of getting rid of the o-ring. I want to add a triangular profile around the diameter of the existing seal, to mate with the machined face opposite.
All of the design guides I see are for gland based o-ring seals. Does anyone know a source for design guidelines for triangular seals?
Help would be much appreciated.
Since I have a machined face opposite the shaft seal, in the other housing, I am thinking of getting rid of the o-ring. I want to add a triangular profile around the diameter of the existing seal, to mate with the machined face opposite.
All of the design guides I see are for gland based o-ring seals. Does anyone know a source for design guidelines for triangular seals?
Help would be much appreciated.





RE: triangular seal without gland
Does the O-ring sit in an O-ring groove in either the seal or other housing? If it just an O-ring on the surfaces you will have problems. O-ring suppliers can give you recommended practices for O-rings. A metal to metal seal that you propose is possible and is used in some instances. A metal to metal seal requires very flat surfaces.
Regards
Dave
RE: triangular seal without gland
I am not after a metal to metal seal, I want to combine the oring with the existing seal that is pressed into one of the housings, the seal that also seals the shaft.
I would then send the new design seal, incorporating the oring, to the current supplier of the existing seal.
RE: triangular seal without gland
That is my two pence
Regards
Dave
RE: triangular seal without gland
Having said that, I would recommend that you put a proper shaft seal in place and machine the correct gland for your flange sealing o-ring. It will cost more and take more time, but you will love me for it in the morning...
Hope that helps.
RE: triangular seal without gland
For the shaft seal, be careful you identify the proper gland, static, dynamic (industrial, recipricating) or rotary. Obviously the flange is a Face Seal.
Parker lists the recommend gland geometry and elastomer squeeze in these seal applications. I personally recommend the textbook for ANY elastomer application.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada