mtce alignment

ALIGNMENT POROS

SHAFT ALIGNMENTDefinisi shaft alignment ?

Adjustment posisi relatif dari dua poros, ex. motor (driver &pompa (driven).Pengaturan posisi center pada kondisi operasi normal.

EFEK MISALIGNMENTROTATING MACHINERY

Distorsi poros (Shaft) Konsumsi energi meningkat Mengurangi umur bantalan Kerusakan seal Shut down tidak terjadwal.

Misaligned

seal terbuka kebocorandan kontaminasi

Kondisi Aligned

JENIS MISALIGNMENT

Parallelmisalignment

Angularmisalignment

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

INSPEKSI PERALATAN

Kerusakan tidak wajar pada kopling. Retaknya poros pada bagian bearing

dekat kopling Penambahan pelumas yang berlebihan

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

ANGULAR MISALIGNMENT

High axial vibrationboth in 1X and 2Xrpm

180 Out-of-phaseacross the coupling(axial axial).

Spectrum

Phase

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

INFRARED THERMOGRAPH

FLEXIBLE COUPLING

FONDASI DAN BASEPLATE

Bowed baseplate Skewed baseplate

PREALIGNMENT

Sebelum melakukan alignment Kondisi fondasi. Kerusakan bearings, shafts, seals, couplings dll. Poros bengkok Softfoot

KOREKSI SOFT FOOT

Soft foot = gap antara mesin dengan fondasi Diperbaiki sebelum alignment Soft foot menyebabkan tegangan pada baut dan bearing

KOREKSI SOFTFOOT

Stress lines due to softfoot Pre-loading bearingdue to softfoot

KOREKSI SOFTFOOTBentuk umum softfoot

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

METODE ALIGNMENT

Straight edge and feeler gauge Face & Rim Reverse Indicator

STRAIGHT EDGE

FEELER GAUGE

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

FACE & RIM

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

REVERSE INDICATOR

DIAL INDICATOR MOUNTING

The stem does not perpendicularto the reading surface

Mounting buruk Mounting benar

DIAL INDIKATOR

Dial tidak menyentuh

VALIDASI PEMBACAAN

kiri + kanan = atas + bawah

PERPINDAHAN PERALATAN

Vertical movement Horizontal movement

Axial movement

CARA PEMBACAAN

Apabila harga pergerakandial dari arah jam 12 ke jam6

Aktuak offset = selish indikatir pada dial

Axial view of the shaft

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

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

ALIGNMENT(Metode graphis)

Position of the driven shaft when the bottom reading is negative (-)


Position of the driven shaft when the bottom reading is positive (+)


Position of the driver shaft when the bottom reading is negative (-)



Position of the driver shaft when the bottom reading is positive (+)

LASER ALIGNMENT

Keuntungan Cepat Panjang poros sampai 20 m Ketelitian tinggi Perhitungan otomatis Pengaruh temp. kecil

Kekurangan Dikalibrasi secara periodik

LASER ALIGNMENT

TOLERANSI ALIGNMENT

CSI RecommendedTolerances forShaft Alignment

FixturlaserRecommendedTolerances forShaft Alignment

Ludeca RecommendedTolerances for ShaftAlignment John Piotrowski

LASER ALIGNMENT

mtce alignment

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