Slide 1Technology Training that works
Maintenance consists of:
Boroscopic inspection is generally carried out
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
Common problems include blade erosion, wear, crack and warping
Most turbines have inspection covers and openings providing access to the turbine rotors and stators
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
Bearing wear is more pronounced with frequent turbine starts
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
Inspection involves various checks carried out for determining mechanical and aerodynamic parameters
Commonly encountered problems:
Loosening of fasteners during operation
Crack formation in rotor blades
Pitting of rotor and stator blades due to wear and erosion
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
examining the machinery for component quality, abnormalities and deviations
accomplished through a planned process ranging from daily checks to major inspections requiring total disassembly
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
Visual external inspection
checking for any signs of abnormalities and external damage wherever reasonable access is possible
Internal inspection
Undertaken on a routine basis as well as to confirm faults indicated by other techniques
Uses devices such as borescopes and optic fibre for monitoring the deterioration of components like compressor and rotor blades
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
X-ray, Ultrasonic, Eddy-current and Isotope inspection techniques
Used for monitoring distortion of nozzle guide vanes, seals, casings etc
Lubrication system monitoring
Periodic checks carried out on filters, chip detectors and the oil consumption pattern. Includes tests like spectrometric analysis
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
Inspection of control system instrumentation for fault indications
Ensures proper functioning of all control instrumentation so that the data obtained is reliable and accurate.
Engine performance trend plotting
Uses a computer program to monitor the basic performance parameters of the engine
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
Inspection procedure which can be carried out even after assembly.
Accomplished with the use of borescopes
OPERATION AND MAINTENANCE OF GAS TURBINES
Technology Training that works
Accurate monitoring of the condition of the internal components.
Time saving