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Monitoring System for Steam Turbine Generator Train
HPTURBINE
GENE-RATOR
STEAM VALVE
LP TURBINE
① ① ① ① ① ①②③ ④
⑤
⑥ ⑦ ⑧
Bearing
①
No Monitoring Parameter No Monitoring Parameter
① Shaft Vibration ⑤ Case Expansion
② Axial Position ⑥ Rotating/Zero Speed
③ Eccentricity p-p ⑦ Phase Marker
④ Differential Expansion ⑧ Valve Posotion
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Monitoring ParametersMonitoring Parameter Description
Shaft Vibration Relative vibration (displacement) between shaft and bearing at each bearing. 1 or 2 points par each bearing.
Bearing Vibration Absolute vibration (velocity or acceleration) of bearing housing/casing. 1 or 2 points par each bearing.
Axial Position
To monitor clearance of thrust bearing. Critical monitoring parameter during operating machine, especially at start up and shut down.
Eccentricity p-p
Shaft can be bent because of its own weight and partial heating. It’s necessary to monitor bending of rotor as observing shaft eccentricity during slow speed turning at non-operating of turbine.
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Monitoring ParametersMonitoring Parameter Description
Differential Expansion
Differential Expansion between rotor and casing because of different thermal expansion of them during start up and operating of turbine.
Case Expansion Thermal expansion of turbine case. Contortion of case expansion is also monitored.
Rotating Speed Rotating speed of turbine shaft (rotor).
Phase Marker Phase reference for vibration analysis. Detection of one rotation for measuring eccentricity p-p.
Valve Position
To observe opening position of main steam inlet valve of steam turbine. This is used for controlling rotating speed of turbine.
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Vibration & Displacement Transducer
VK SeriesVibration Transducer
CA Series Acceleration Transducer
CV SeriesVelocity Transducer
RD SeriesTacho Driver
MS SeriesMagnetic Pickup
LVDT SeriesDifferential Transformer
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VM-11 SeriesSignal Conditioner
VM-5 Series TSI Monitor
Monitor
VM-15 Monitor
VM-16 Monitor
MP-1 Series Machine Protection
System
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Oscillator-Demodulator(Driver)
VibrationMonitor
Sensor
Sensor
Rotor
45° 45°
Vertical center
Extension cable
Radial Shaft Vibration
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Radial Shaft Vibration
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Radial Shaft Vibration
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Casing Vibration
VibrationMonitor
Accelerometer
Double-Helical Gear
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Casing Vibration
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Casing Vibration
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Axial Position
ThrustMonitor
Sensor
Rotor
Oscillator-Demodulator(Driver)Extension
cable
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Axial Position
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Speed Monitor(Tachometer)
Rotor
Sensor
Shaft rotational speed
Extension cable
Oscillator-Demodulator(Driver)
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Rotating Speed
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Phase Marker
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Differential Expansion
Ramp targettype
DifferentialExpansion
Monitor
Driver
SensorRotor
Rotor
RotorComplementary input type
Ramp targettype
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Differential Expansion
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Differential Expansion
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LVDTTransmitter
LVDT
Case ExpansionMonitor
Case Expansion
LVDT (Linear Variable Differential Transformer)
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EccentricityMonitorDriver
Sensor forEccentricity
Rotor
Sensor forPhase Mark Sensor for
Phase Mark
Eccentricity peak to peak
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Eccentricity peak to peak
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Phase Marker for Eccentricity
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LVDT
Actuator
Main Steam
Valve
LVDTTransmitter
Valve PositionMonitor
Rotor
Valve Position