TURBINE SEALS LUBRICATION AND BEARING PROTECTION · PDF fileturbine seals lubrication and...
Transcript of TURBINE SEALS LUBRICATION AND BEARING PROTECTION · PDF fileturbine seals lubrication and...
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TURBINE SEALS
LUBRICATION AND BEARING PROTECTION FOR STEAM TURBINES
ISOMAGISOMAG
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IS LEAKING STEAM GETTING INTO YOUR
TURBINE OIL ?
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HOW FREQUENTLY DO YOU NEED TO
DRAIN WATER FROM YOUR TURBINE OIL ?
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DO CARBON BOXES EVER LEAK STEAM ?
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LABYRINTH SEALS RESTRICT STEAM FROM YOUR OIL
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LABYRINTH SEALS DO NOT SEAL STEAM
FROM YOUR OIL
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WOULD TURBINE BEARINGS LAST
LONGER WITHOUT STEAM & WATER
CONTAMINATION ?
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HH22O + OIL = SLUDGEO + OIL = SLUDGE
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CONTAMINATING TURBINE OIL
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THE PROBLEMTHE PROBLEMHigh pressure steam is trying to escape past the carbon rings in the carbon boxes.
Carbon rings wear and progressively leak more.
Labyrinth bearing seals only slow down the leaking steam, they will not stop it.
Leaks from the carbon box are adjacent to and directed at the labyrinths.
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HIGH PRESSURE STEAM
OIL
CARBON BOXES
BEARING SEALSBEARING SEAL
OIL
TYPICAL TURBINETYPICAL TURBINE
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TYPICAL I.D. ONE PIECE TYPICAL I.D. ONE PIECE OEM LABYRINTH OEM LABYRINTH
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TYPICAL O.D. ONE PIECE TYPICAL O.D. ONE PIECE OEM LABYRINTH OEM LABYRINTH
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TYPICAL TWO PIECE TYPICAL TWO PIECE REPLACEMENT LABYRINTH REPLACEMENT LABYRINTH
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FLAT FACE FLAT FACE MECHANICAL SEALMECHANICAL SEAL
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SEALING CHOICESSEALING CHOICESONE PIECE LABYRINTH OPEN LEAK PATH
MECHANICAL SEAL
TWO PIECE LABYRINTH OPEN LEAK PATH
NO LEAK PATH TOTALLY SEALED
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FLAT FACE FLAT FACE MECHANICAL SEALSMECHANICAL SEALS
PROVEN TECHNOLOGY
PRECISION LAPPED SEALING FACES
HERMETIC SEALING
LOW FRICTION
NO SHAFT FRETTING
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ISOMAGISOMAGTechnology leader in
precision flat face sealing and protection of
industrial bearing and lubrication systems
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ISOMAGISOMAGHOW TO HOW TO SELECT SELECT
TURBINE SEALSTURBINE SEALS
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TYPICAL HORIZONTAL TYPICAL HORIZONTAL SPLIT CASE TURBINESPLIT CASE TURBINE
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HIGH PRESSURE STEAM
OIL
CARBON BOXES
BEARING SEALSBEARING SEAL
OIL
NEEDS 3 SEALSNEEDS 3 SEALS
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1. Drive end 1. Drive end ““OUTBOARDOUTBOARD””
2. Drive end 2. Drive end ““INBOARDINBOARD””
3. Governor end 3. Governor end ““INBOARDINBOARD””
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Different turbine housingsDifferent turbine housings3 most common configurations3 most common configurations
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ISOMAGISOMAG
MAGNUM-S
CARTRIDGE SEAL
RSA
COMPONENT SEAL
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MAGNUMMAGNUM––S Cartridge SealS Cartridge SealBuilt to fit Built to fit ““MALEMALE”” & & ““FEMALEFEMALE”” turbine turbine housings and standard cross section housings and standard cross section straight straight ““STRAIGHTSTRAIGHT”” housings.housings.
RSA Component SealRSA Component SealCompact cross section for narrow cross Compact cross section for narrow cross section section ““STRAIGHTSTRAIGHT”” housings.housings.
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INSIDE THE MAGNUMINSIDE THE MAGNUM--S S CARTRIDGE SEALCARTRIDGE SEAL
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MAGNUM MAGNUM -- S MALE FITS MALE FIT
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MALE HOUSINGMALE HOUSING
SEALS FIT HERE
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MAGNUM MAGNUM -- S FEMALE FITS FEMALE FIT
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MAGNUM MAGNUM -- S FEMALE FITS FEMALE FIT
MAGNUM-S
DRIVE END
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INSIDE THE RSAINSIDE THE RSA
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RSA INSIDE FITRSA INSIDE FIT
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RSA INSIDE FITRSA INSIDE FITRSA STATIONARY RSA ROTOR
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STRAIGHT HOUSINGSTRAIGHT HOUSING
SEALS FIT HERE
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RSA with RSA with STEAM DEFLECTORSTEAM DEFLECTOR
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RSA & STEAM DEFLECTORRSA & STEAM DEFLECTOR
STEAM DEFLECTOR
RSA SEAL
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RSA OUTSIDE FITRSA OUTSIDE FIT
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STEAM DEFLECTORSSTEAM DEFLECTORSA steam defector is a metal disc attached to the shaft and located between the carbon box and the seal. It is normally constructed of 416 or 17-4ph low expansion stainless steel. The deflector is manufactured to heat shrink to the turbine shaft with an inside diameter .002”to .003” smaller than the shaft diameter.
Use a steam deflector when the steam leaking from the carbon box is in excess of 300 degrees F.
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MEASURE IT RIGHTMEASURE IT RIGHT3 DECIMAL PLACES
.001 INCH
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RECORD THE DIMENSIONSRECORD THE DIMENSIONS
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ISOMAGISOMAGHOW TO HOW TO INSTALL INSTALL
TURBINE SEALSTURBINE SEALS
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1. Smooth sharp edges from keyways and steps.
2. Lightly lubricate rotor o-ring.
3. Slide seals into position on shaft.
SMOOTH EDGES
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4. Lift rotating assembly5. Lower rotating assembly into lower housing … while…
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6. Guiding seals into position
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7. RSA seal only, gently push rotor up to the stationary (you will feel the magnets pull the rotor and stationary together)
8. Finish turbine assembly
9. You are finished
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•Seals Out Contaminants
•Seals In Lubrication
•Stops thermal cycle aspiration of air and vapor into bearings
Maximum Sealing = Maximum Protection
ISOMAGISOMAG
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Turbines do not have to Turbines do not have to look like this look like this