Seal/Sleeve Material problem
Seal/Sleeve Material problem
(OP)
Seal Bearing Sleeve
I have a requirement for a coated or solid sleeve to operate in seawater.
The sleeve will be fitted to a propeller drive shaft with 5 seals running on the outside diameter.
Sleeve duties,
Rotational speed - >600 RPM.
Seal - Shamban Variseal PTFE impregnated with graphite.
The sleeve will rotate submerged in seawater at pressures from 2 - 45 Bar.
When the sleeve is not rotating it will be submerged in seawater at pressures from 2 - 45 Bar, or on the surface subjected to salt spray.
Sleeve Surface Requirements,
Surface Finish - 0.05-0.1 ?m RA Plunge ground.
Material Contact Area Mr - 70%
Determined at a cut depth c=0.25 x RZ relative to the reference line of Cref 5% Mr.
Hardness - 65-70 RC Min
Can anyone advise on an appropriate sleeve material? Information on alternative seals that can operate in this environment would also be appreciated?
I have a requirement for a coated or solid sleeve to operate in seawater.
The sleeve will be fitted to a propeller drive shaft with 5 seals running on the outside diameter.
Sleeve duties,
Rotational speed - >600 RPM.
Seal - Shamban Variseal PTFE impregnated with graphite.
The sleeve will rotate submerged in seawater at pressures from 2 - 45 Bar.
When the sleeve is not rotating it will be submerged in seawater at pressures from 2 - 45 Bar, or on the surface subjected to salt spray.
Sleeve Surface Requirements,
Surface Finish - 0.05-0.1 ?m RA Plunge ground.
Material Contact Area Mr - 70%
Determined at a cut depth c=0.25 x RZ relative to the reference line of Cref 5% Mr.
Hardness - 65-70 RC Min
Can anyone advise on an appropriate sleeve material? Information on alternative seals that can operate in this environment would also be appreciated?





RE: Seal/Sleeve Material problem
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RE: Seal/Sleeve Material problem
RE: Seal/Sleeve Material problem
There are alternative seals to the AV seals you mentioned. Your pressure is high and you did not mention the size (s). Have to be careful of your PV value as it will determine seal life. Let me know if you need help.