Condition monitoring through non destructive testings of machine ppt
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Condition monitoring through non destructive testings of machine ppt Condition monitoring through non destructive testings of machine ppt Presentation Transcript

  • WELCOME
  • CONDITION MONITORING THROUGH NON DESTRUCTIVE TESTINGS OF MACHINES AND PLANTS PRESENTED BY : ANOOP GOPAL ROLL NO: 09 S7 MECHANICAL
  • INTRODUCTION
    • CONDITION MONITORING
    • SIGNATURE ANALYSIS
    • NON-DESTRUCTIVE EVALUATIONS(NDE)
    • IN-SERVICE INSPECTIONS (ISI)
    • SAFTEY
  •  
  • CONDITION BASED MAINTENANCE 2.PREVENTIVE 3.PREDICTIVE 1.BREAK DOWN MAINTENANCE
  • NDE TECHNIQUES 1.VIBRATION MONITORING 2.ACOUSTIC EMISSION (AE) 3.INFRARED THERMOGRAPHY (IRT) 4.FERROGRAPHY 5.FIELD SIGNATURE MAPPING (FSM)
  • VIBRATION MONITORING INSTRUMENTATION
    • VIBRATION MEASURING AND ANALYSIS SYSTEM
    • MINI COMPUTERS
    • PROBABILITY DENSITY FUNCTION ANALYSIS (PDF)
    • BY INSPECTION
    VIBROMETER CHANNEL SELECTOR FREQUENCY ANALYSER RECORDER fig,(1.a) SIGNAL FLOW DIAGRAM MACHINE
  • ANALYSIS OF RESULTS 1. VIBRATION CAUSE IDENTIFICATION Sl No FAULT FREQUENCY DIRECTION OF VIBRATION 1 ROTATING UNBALANCE SAME AS RUNNING SPEED RADIAL 2 MISALIGNMENT OF BEARINGS 2*SPEED RADIAL AND AXIAL 3 ROLLER BEARING DEFECT AT BALL OR ROLLER SPEEED ULTRA SONIC FREQUENCIES(20-60KHz) RADIAL AND AXIAL 4. OIL FILM WHIRL IN HIGHSPEED TURBO MACHINES 0.5*SPEED RADIAL 5 DAMAGED OR WORN GEARS No: OF TEETH* RPM RADIAL
  • VIBRATION METER (HAND HELD) Vibration Meter : for imbalance, structural weakness, loose parts etc INDUSTRIAL MACINERY CLASSIFICATION Class 2: Medium size machines without special foundation Class 3: Large machines on rigid foundations Class 4: Large machines on soft foundations. SPM VIB-11 by SKF
  •  
  • APPLICATIONOF VIBRATION MONITORING IN PLANTS
    • MONITORING AT ‘ ROURKELA STEEL PLANT’
    • maintenance cost 10-15% of prod: cost
  • GROWTH THROUGH CBM ACTIVITIES AT RSP No: of machines BREAK DOWNS PREVENTED-10-102 EQUIPMENTS INCLUDED - 40-140 year
  • ACOUSTIC EMISSION MONITORING AE sensors respond with amazing sensitivity to motion in the low ultrasonic frequency range (10 kHz - 2000 kHz).  Motions as small as 10 -12 inches and less can be detected
  • ACOUSTIC-EMISSION METHOD This method is based on the registration of the elastic compression waves that are emitted by the defects developing in the stressed constructions.
  • ACOUSTIC EMISSION SYSTEMS
    • AE data collection systems
    • Laptop based AE system
    • DiSP Systems (any number of channels can be used)
    •   Portable AE test system (lunch box)
    • Pressurization (Stage 1)
    • Random AE activity due to
    • Mechanical rubbing between support structure and vessel
    • 2. Paint layer peel-off .
    • Re pressurization (Stage 2)
    • No significant AE activity
    CASE STUDY AE DURING HYDROTESTING OF A HORTON SPHERE MAX : PRESSURE 22 Kg/cm 2 Fig.2(f) AE monitoring during hydro testing of Horton sphere
    • AE SIGANLS FROM NEWER AREA ( local plastic deformation )
    • NO SIGNAL DURING SUBSEQUENT PRESSURIZATION
  • IR THERMOGRAPHY
    • Infrared thermography is based on the principle of detection and measurement of infrared radiations QR) arising from the natural or stimulated thermal radiation of an object21
  • I R MEASURING SYSTEMS ThermaCAM S60 : Real-Time Thermal
    • highly sensitive thermal imaging,
    • precision temperature measurement,
    • enhanced connectivity options including
    • high speed data transfer
    • extensive thermal analysis capabilities
    Type VARIOSCAN 3021 ST Spectral range [µm] 8 ... 12 Detector material Hg, Cd, Te Detector cooling Stirling-cooler
  • r aw thermo graphic data. data after removing the noise and vertical gradient. data processed for the local gradient in surface temperature. CASE STUDY high strength welds Fig setup for infrared testing of lap joints correspond to low strength welds.
  • FERROGRAPHY 1.WEAR DEBRIS ANALYSIS MODE: ABRASION, IMPACT, FATIGUE, EROSION, CORROSION RATE : CONCENTRATION OF WEAR DEBRIS SEVERITY : SIZE OF DEBRIS INDICATES LOCATION : COLOUR OF THE PARTICLES 2.SPECTROMETRIC ANALYSIS
    • OIL ELECTRICALLY EXCITED TO THE POINT WHERE LIGHT IS EMITTED.
    • ELEMENT EMITS A LIGHT OF ITS OWN PARTICULAR COLOR AND FREQUENCY.
    • SPECTROMETERS TRANSLATES THE INTENSITY OF THIS RAINBOW OF COLORS INTO A COMPUTERIZED READOUT .
  • HOW IS THE TEST PERFORMED Tests Conditions Detected # Abnormal Wear Fuel Dilution Dirt Water Coolant Incorrect Oil Oxidation Additive Depletion Glycol Test         *       Viscosity   *       *     Appearance/Odor   * * * *   *   Spectrometric Analysis *   *   * *     Alkaline Reserve           *   * Blotter Spot Test     * *     *   Water Content       *         Distillation   *             Flash Point   *            
  • WEAR METAL ORIGIN TABLE METAL WEAR POSSIBLE ORIGIN. ALUMINIUM BEARINGS,BLOCKS,BLOWERS,BUSHINGS, CLUTCHES,PISTONS. CHROMIUM BEARINGS,PUMPS,RINGS,RODS. COPPER BEARINGS,BUSHINGS,CLUTHES,WASHERS. IRON BLOCKS,CRANK SHAFTS, CYLINDERS,DISCS. SILVER SOLDERS. TIN PISTONS.
  • MEASURING INSTRUMENT ModelT2FMAnalytical Ferrograph . Bi chromatic microscope. Video camera. Video capture card. Image capture software. industrial standard personal computer . This measure the effects of Contamination and electro-chemical changes that occur in synthetic and petroleum based oils
  • FIELD SIGNATURE MAPPING
    • The FSM Inspection Tool (FSM) is a new technology for monitoring and inspection of metallic pipes and structures, pipelines and storage vessels
    • Reduce life cycle inspection costs
    • Reduce inspection time
  • FIELD PATTERN Sensing pins (electrodes) in an array over the monitored area to detect changes in the electrical field pattern. The voltage = the signature . Graphical plots indicating the severity and location of corrosion, and calculates actual corrosion and metal loss
  • INDUSTRIAL ARRANGEMENT A typical refinery monitors high temperature areas such as heater bends in the distillation unit.
  • CONCLUSION
  • SUMMARY OF APPLICABILITY AND CAPABILITY OF VARIOUS NDT TECHNIQUES NDT TECHNIQUE DETECTION CAPABILITY NON CONTACT INSPECTION AUTOMATED INSPECTION DEFECT SIZING VIBRATION VOLUMETRIC POSSIBLE POSSIBLE POSSIBLE ACOUSTIC EMISSION VOLUMETRIC POSSIBLE POSSIBLE NOT POSSIBLE I R THERMO- GRAPHY SURFACE , NEAR SURFACE POSSIBLE POSSIBLE POSSIBLE FERROGRAPHY VOLUMETRIC POSSIBLE POSSIBLE POSSIBLE F S M SURFACE, NEAR SURFACE POSSIBLE POSSIBLE POSSIBLE
  • THANK YOU