1. WELCOME

2. BASICS OF VIBRATION

3. VIBRATION CHARACTERISTICS OF VIBRATION SIGNAL AMPLITUDE FREQUENCY
PHASE
ORBIT

4. TYPES OF VIBRATION PICK UP
PROXIMITY PROBE
VELOCITY PICK UP
ACCELEROMETER

5. CRITERIA FOR SELECTION OF VARIOUS TYPES OF VIBRATION PICK UP
PROXIMITY PROBE
SHAFT VIBRATION MEASUREMENT
KEY PHASER MARKER
SHAFT CENTRE LINE POSITION
BEST SUITED FOR 1 TO 500 HZ
VELOCITY PICK UP
FOR BEARING AND STRUCTURAL VIBRATION
BEST SUITED FOR 10 TO 1000 HZ

6. CRITERIA FOR SELECTION OF VARIOUS TYPES OF VIBRATION PICK UP
ACCELEROMETER
FOR HIGH FREQUENCY RANGE
BEST SUITED FOR 1000 HZ ONWARDS

7. UNITS OF VIBRATION (A) DISPLACEMENT MICRONS, PEAK TO PEAK
MICRONS, 0 TO PEAK
MICRONS, RMS
(B) VELOCITY
MM/SEC, 0 TO PEAK
MM/SEC, RMS
(C)ACCELERATION
M/SEC2, PEAK
M/SEC2, RMS
G, PEAK
G, RMS

8. UNITS OF VIBRATION RMS = 0.707 x (0-Peak) Average = 0.637 x (0-Peak)
Peak - Peak
RMS = x (0-Peak)
Average = x (0-Peak)
Peak to Peak = 2 x (0-Peak)

9. SHAFT ORBIT Y X
Proximity
Probes

10. INSTRUMENTS FOR VIBRATION MEASUREMENT
VIBROMETER
VIBRATION ANALYSER
FFT ANALYSER

11. TIPS FOR MAKING VIBRATION DATA MORE USEFUL FOR ANALYSIS
LOCATION OF VIBRATION PICK UPS TO BE INDICATED
LOCATION OF PHOTOCELL TO BE INDICATED
DIRECTION OF ROTATION SHOULD BE INDICATED
KEY PHASER MARK ON ROTOR POSITION TO BE INDICATED
AXIAL VIBRATION PHASE LOGGING MUST HAVE DIRECTION INDICATION
NAME OF VIBRATION ANLAYSER SHOULD BE INDICATED
VIBRATION UNITS TO BE INDICATED

12. TIPS FOR MAKING VIBRATION DATA MORE USEFUL FOR ANALYSIS
WHILE GIVING CONTROL ROOM VALUES, SPECIFY THE VIBRATION UNITS AND LOCATION OF THE PICKUPS
VIBRATION MUST BE MEASURED BY PORTABLE VIBRATION METER NEAR CONTROL ROOM PICKUP FOR VARYING THE CORRECTNESS OF CONTROL ROOM MEASUREMENT
PICK UP SHOULD NOT BE MOUNTED LOOSE
BRACKET FOR EXTERNAL SHAFT VIBRATION PICKUP SHOULD BE STIFF ENOUGH NOT TO PRODUCE AMPLIFICATION / RESONANCE

13. TIPS FOR MAKING VIBRATION DATA MORE USEFUL FOR ANALYSIS
FOR CORRECT TRENDING OF VIBRATION READINGS, SAME LOCATION SHOULD BE USED FOR ALL PERIODIC MEASUREMENTS

14. REASONS OF VIBRATION
IF THE MEASUREMENT IS HEALTHY, FOLLOWING MAY BE THE REASONS OF VIBRATION PROBLEM
UNBALANCE
MISALIGNMENT
LOOSENESS
PIPE PULLS
SHAFT CATENARY / BEARING LOADING
RESONANCE
UNEQUAL FLOW PATH CLEARANCES
RUBBING

15. REASONS OF VIBRATION SHAFT BOW OIL / STEAM WHIRL
DEVIATED OPERATING PARAMETERS
DEFECTIVE BEARING / ASSEMBLY OF BEARING
VIBRATION TRANSMITTION FROM OTHER SOURCE
GEAR INACCURACIES
CASING DISTORSTION
CAVITATION

16. STEPS FOR RESOLVING THE VIBRATION PROBLEM
ACCURATE MEASUREMENT OF VIBRATION DATA
COLLECTION OF OPERATING PARAMETERS
STUDY OF HISTORY OF VIBRATION BEHAVIOUR / OVERHAULING REPORTS / RECURRING PROBLEM FACED
INTERACTION WITH O&M PERSONNELS
COLLECTION OF DETAILED VIBRATION BEHAVIOUR AT VARIOUS CONDITIONS OF OPERATION LIKE NO LOAD RUN, RUN UP, RUN DOWN, WITH AND WITHOUT EXCITATION, PART AND FULL LOAD OPERATION ETC.
VIBRATION ANALYSIS TO NARROW DOWN THE REASONS OF HIGH VIBRATION

17. STEPS FOR RESOLVING THE VIBRATION PROBLEM
FORMULATION OF ACTION PLAN (SHORT TERM / LONG TERM)
IMPLEMENTATION OF ACTION PLAN
RESPONSE OF MACHINE AFTER IMPLEMENTATION OF ACTION PLAN
FRESH VIBRATION ANALYSIS, IF THE PROBLEM PERSISTS
IMPLEMENTATION OF NEW ACTION PLAN
THE CYCLE OF VIBRATION ANALYSIS AND IMPLEMENTATION OF ACTION PLAN CONTINUES TILL THE VIBRATION PROBLEM IS SATISFACTORILY RESOLVED

18. KNOW YOUR MACHINES KNOWLEDGE OF BEHAVIOUR FOR SIMILAR TYPE OF MACHINES
VIBRATION PRONE AREAS
INFLUENCE OF PARTICULAR OPERATING PARAMETER

19. INTERNATIONAL STANDARDS ON VIBRATION
ISO BEARING VIBRATION
ISO 7919 SHAFT VIBRATION
THERE ARE THREE LIMITS IN INTERNATIONAL STANDARDS
LIMITS FOR NEW MACHINES
ALARM LIMITS
TRIP LIMITS

20. RECOMMENDED LOCATIONS OF VIBRATION MEASUREMENTS ON BEARINGS AS PER ISO

21. RECOMMENDED LOCATIONS OF SHAFT VIBRATION MEASUREMENTS AS PER ISO
Measuring Amplifier
Measuring Amplifier
PROXIMITY PICK-UP
45O
45O
VERTICAL L R R OR L
SHAFT
SHAFT
HORIZONTAL

22. THANK YOU