mtce alignment
Post on 15-Nov-2015
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ALIGNMENT POROS
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SHAFT ALIGNMENTDefinisi shaft alignment ?
Adjustment posisi relatif dari dua poros, ex. motor (driver &pompa (driven).Pengaturan posisi center pada kondisi operasi normal.
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EFEK MISALIGNMENTROTATING MACHINERY
Distorsi poros (Shaft) Konsumsi energi meningkat Mengurangi umur bantalan Kerusakan seal Shut down tidak terjadwal.
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Misaligned
seal terbuka kebocorandan kontaminasi
Kondisi Aligned
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JENIS MISALIGNMENT
Parallelmisalignment
Angularmisalignment
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IDENTIFIKASI MISALIGNMENT
Inspeksi peralatan Kerusakan awal pada bearing, seal, shaft, or coupling
failures.
Temperatur tinggi pada bearings atau minyak pelumass
Kebocoran yang berlebihan pada seal
Longgar baut pengikat kaki
Longgar atau rusak baut pada kopling
Pecah atau rusak karet pada fleksibel kopling
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INSPEKSI PERALATAN
Kerusakan tidak wajar pada kopling. Retaknya poros pada bagian bearing
dekat kopling Penambahan pelumas yang berlebihan
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DATA ANALISA VIBRATION
Bentuk Vibrasi pada misalignment : Vibrasi pada arah aksial. High vibration at 1xTS or 2xTS in the
spectrum. Signifikasi fase getaran 180 derajat
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ANGULAR MISALIGNMENT
High axial vibrationboth in 1X and 2Xrpm
180 Out-of-phaseacross the coupling(axial axial).
Spectrum
Phase
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PARALLEL MISALIGNMENT
High radial vibration, 2x rpmoften larger than 1x rpm, butits height relative to 1x rpmis often dictated by couplingtype and construction
180 Out-of-phase acrossthe coupling (horizontal horizontal or vertical vertical)
Spectrum
Phase
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INFRARED THERMOGRAPH
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FLEXIBLE COUPLING
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FONDASI DAN BASEPLATE
Bowed baseplate Skewed baseplate
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PREALIGNMENT
Sebelum melakukan alignment Kondisi fondasi. Kerusakan bearings, shafts, seals, couplings dll. Poros bengkok Softfoot
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KOREKSI SOFT FOOT
Soft foot = gap antara mesin dengan fondasi Diperbaiki sebelum alignment Soft foot menyebabkan tegangan pada baut dan bearing
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KOREKSI SOFTFOOT
Stress lines due to softfoot Pre-loading bearingdue to softfoot
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KOREKSI SOFTFOOTBentuk umum softfoot
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KORESKSI SOFT FOOT
Dial IndicatorInstall a dial indicator on the footand watching the movementas you loosen the hold down bolt.
Laser MethodMount the laser on the machine shafton either side of coupling
Loosen individual bolt and retightenRead the live display
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METODE ALIGNMENT
Straight edge and feeler gauge Face & Rim Reverse Indicator
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STRAIGHT EDGE
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FEELER GAUGE
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FACE & RIM
PROSEDUR1. Attached bracket firmly to one shaft and position
indicators on face and periphery of other shaft2. Zero the indicators at the 12 oclock position3. Rotate slowly the shaft and bracket arrangement through
90 degrees interval stopping at the 3, 6 & 9 oclockpositions. Record each reading (+ or -)
4. Return to the 12 oclock position to see if the indicators re-zero
5. Repeat steps 2 through 4 to verify the first of readings
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FACE & RIM
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REVERSE INDICATORPROSEDUR1. Attached bracket(s) firmly to one shaft(s) and position
indicator(s) on face and periphery of other shaft(s)2. Zero the indicator(s) at the 12 oclock position3. Rotate slowly the shaft and bracket arrangement through
90 degrees interval stopping at the 3, 6 & 9 oclockpositions. Record each reading (+ or -)
4. Return to the 12 oclock position to see if the indicator(s)re-zero
5. Repeat steps 2 through 4 to verify the first of readings6. If one bracket was used, mount bracket on other shaft
and repeat steps 1 through 5
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REVERSE INDICATOR
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DIAL INDICATOR MOUNTING
The stem does not perpendicularto the reading surface
Mounting buruk Mounting benar
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DIAL INDIKATOR
Dial tidak menyentuh
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VALIDASI PEMBACAAN
kiri + kanan = atas + bawah
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PERPINDAHAN PERALATAN
Vertical movement Horizontal movement
Axial movement
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CARA PEMBACAAN
Apabila harga pergerakandial dari arah jam 12 ke jam6
Aktuak offset = selish indikatir pada dial
Axial view of the shaft
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CARA MEMBACA
Solusi matematis(+) = the unit has to be raised
(add shim) for verticalmovement or moved to theleft for horizontalmovement
(-) = the unit has to be loweredor moved to the right
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CARA PEMBACAAN
Solusi matematis
(+) = the unit has to be raised(add shim) for verticalmovement or moved to theleft for horizontalmovement
(-) = the unit has to be loweredor moved to the right
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ALIGNMENT(Metode graphis)
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Position of the driven shaft when the bottom reading is negative (-)
ALIGNMENT(Metode graphis)
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Position of the driven shaft when the bottom reading is positive (+)
ALIGNMENT(Metode graphis)
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Position of the driver shaft when the bottom reading is negative (-)
ALIGNMENT(Metode graphis)
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ALIGNMENT(Metode graphis)
Position of the driver shaft when the bottom reading is positive (+)
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LASER ALIGNMENT
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LASER ALIGNMENT
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LASER ALIGNMENT
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Keuntungan Cepat Panjang poros sampai 20 m Ketelitian tinggi Perhitungan otomatis Pengaruh temp. kecil
Kekurangan Dikalibrasi secara periodik
LASER ALIGNMENT
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TOLERANSI ALIGNMENT
CSI RecommendedTolerances forShaft Alignment
FixturlaserRecommendedTolerances forShaft Alignment
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Ludeca RecommendedTolerances for ShaftAlignment John Piotrowski
LASER ALIGNMENT
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