Date post: | 15-Apr-2017 |
Category: |
Engineering |
Upload: | sanjit-devnath |
View: | 486 times |
Download: | 33 times |
www.sajetc.com
Presentation & Demonstration on
Condition Monitoring
By
Engr. Md. Shahin Manjurul AlamSaj Engineering & Trading Company
www.sajetc.comObjective
• Condition Monitoring (CM)• Condition Monitoring Techniques• Vibration Analysis • Oil Analysis
Types of machines
MotorsPumpsFansGearboxesEnginesCompressorsSteam TurbinesGeneratorsGas TurbinesHydro Turbines
Rotating Or
Reciprocating Machines
www.sajetc.com
Heat
Noise
Smell
Smoke
Feel
Equipment Perform
ance
TimeFF
PP
Mechanical
UltrasoundVibration
Analysis
Oil Analysis
Thermograp
hyNDT
Lubrication Excellence
Proactive
Precision Maintenance Alignment, Balance, etc.
Select SuppliersSupplier Specifications
MetricsEquipment Ranking
RCMTPM
RCA/FMEARCDTraining ProgramsWritten Procedures
Job Planning/SchedulingCMMS System
Predictive Reactive
We are in here
Machine Condition Chart
www.sajetc.com
Condition monitoring is the process of monitoring a parameter of condition in machinery, such that a significant change is indicative of a developing failure. It is a major component of Predictive Maintenance (PdM). The use of conditional monitoring allows maintenance to be scheduled, or other actions to be taken to avoid the consequences of failure, before the failure occurs.
Condition Monitoring
Machine condition monitoring technologies
Industrial requirements for machine condition monitoring
•Non-intrusive measurements
•Early detection to reduce cost
•Multiple technologies for complete assessment
www.sajetc.com
Condition Monitoring For your Plant
Vibration Analysis Oil Analysis
UltrasoundAnalysis
ThermalAnalysis
www.sajetc.com
If you think this is your plant, then your plant is stand on this 4 technologies
What Is Vibration ? www.sajetc.com
Vibration is a "back and forth" movement of a structure. It can also be referred to as a "cyclical" movement
Machine failures
…and the VIbration is a common cause of failure
are very costly… sometimes spectacular,
www.sajetc.com
Vibration Analysis
More than 20 years ago someone made the statement, “The vibrations produced in a machine are the best indication of the machine’s health.” This statement still holds true today. Of all the predictive maintenance (PdM) technologies, vibration analysis remains the best measure of machine health. This is true because vibration monitoring can alert us to so many different conditions that may indicate potential machine failures. Unbalance, misalignment, bearing faults, resonance, looseness, cavitations and electrical problems are just a few of the many problems that can be detected with vibration monitoring.
www.sajetc.com
www.sajetc.comCommon Problems that Generate
Vibration1. Misalignment2. Unbalance3. Worn belts & pulleys4. Bearing Defects5. Hydraulic Forces6. Aerodynamic Forces7. Reaction Forces8. Reciprocating Forces9. Bent Shafts10.Rubbing11.Gear Problems12.Housing Distortion13.Certain Electrical
Problems14.Frictional Forces
www.sajetc.comWhat we Measure for
Vibration Analysis
Amplitude: How Much Movement Occurs or severity of the vibration.
Amplitude measures as1. Displacement: mm, mils (0.001”)2. Velocity: mm/sec, in/sec3. Acceleration: G’s (1g= Force of gravity) or rms (root mean square)
Frequency: How Often The Movement Occurs. How many "cycles" in a period of time: a second or a minute
Unit: Cycle per second (Hz) Cycle per Minute (CPM)
Phase: In What Direction Is The Movement. It also called phase angle.
Unit: Degree
www.sajetc.comHow we measure Vibration
Axial: Axial direction is always on the parallel to the shaft axis.
Vertical: A Transducer Mounted Vertically "Sees“ Only Vertical Movement
Horizontal: A Transducer Mounted Horizontally "Sees" Only Horizontal Movement
www.sajetc.comVibration Transducer Sensors…Transducers…Probes…What is it?
….It basically converts mechanical vibration to an electrical signal
AccelerometerCharge Type &
Line DriveConstant Voltage &Constant Current
VelocityTransducer
DisplacementShaft Riders
Proximity Probes(Eddy Current Probes)
www.sajetc.com
Radial Horizontal
Radial Vertical
Axial
Vertical
Axial
Horizontal
Mounting Direction
www.sajetc.comMounting DirectionVert.
Axial
Hori. Vert.
Axial
Hori.
For detail study of vibration dynamics of machine – vertical, horizontal and axial at each bearing location
For monitoring – one point per bearing and add axial whenThere is a thrust bearing or axial potential faults eg. misalignment
Machinery Health Monitoring Machinery Health Monitoring Strategy Strategy
~125 Machines
~1375 Machines
~500 Machines
~500 Machines
Total # Machines 2,500Typical Industrial Process Plant
5%5%CriticalCritical
25%25%EssentialEssential
30%30%ImportantImportant
20%20%SecondarySecondary
20%20%Non-EssentialNon-Essential
TurbinesGenerators
Compressors
MotorsPumps
FansGears
Application at Typical PlantApplication at Typical Plant
Online Solutions for Online Solutions for critical machinery critical machinery
WirelessWirelessTransmittersTransmitters
Multi TechnologiesMulti TechnologiesPortable SolutionsPortable Solutions
www.sajetc.com
By the Medical ECG we know the
condition of our Heart
By the CSI 2140 we check your Machinery
Health Condition
www.sajetc.com
www.sajetc.comData Representation
Wave Form Plot or Domain Plot
FFT Spectrum Plot
Orbit PlotWaterfall Plot
Unbalance Misalignment
Structural Looseness
Bearing Looseness
Structural Resonance Sleeve Bearing
Looseness/RubsGear ProblemMisalignment Pump Cavitation
FFT Spectrum Plot for some Problems www.sajetc.com
X=RPM=CPM CPM=Cycle per minute=60Hz1X=1xRPM=1xCPM2X=2xRPM=2xCPM3X=3xRPM=3xCPM
Demonstration on Vibration Analysis Technology
www.sajetc.com
CSI 2140 Machinery Health AnalyzerFive Inputs = Four Channels + Tacho
Five Inputs:Channel 1Channel 2Channel 3Channel 4
+Tachometer
www.sajetc.com
4 Channel Volts + Tach
Dual Orbits!
www.sajetc.com
4 Channel Volts + Tach
4 Channel Accel+ Tach4 Channel Accel+ Tach
www.sajetc.com
Multiple Live Plots – Up to 8! www.sajetc.com
Oil Analysis www.sajetc.com
OIL . . . your engine’s lifeblood . . . can reveal its internal condition……
What Oil Analysis
Oil analysis is a quick, nondestructive way to gauge the health of an engine by looking at what's in the oil. It is as like as medical blood test, where we can know about our diseases from our blood.
Oil Analysis Blood Test
www.sajetc.com
www.sajetc.com
• Friction control --- Separates moving surfaces• Wear control --- Reduces abrasive wear• Corrosion control --- Protects surfaces from
corrosive substance• Temp control --- Absorbs and transfer heat• Contamination control --- Transport particles and other contaminants to
filters/separators• Power transmission --- In hydraulics, transmits force
and motion
Functions of Lubricants
Oil Analysis seeks to provide answers for…
Change Filter?Change Oil?Tear Down?
30
www.sajetc.com
Cost justification for industrial oil analysis
Documented case histories and cost savings on-site oil analysis to monitor a wide range of industrial machinery. Realistic Return on Investment: 500%+
Defer maintenanceProactive CONTAMINATION CONTROLKeeping oil clean, dry, and fit for use
Reduce oil consumptionLESS OIL USED
“Test it, don’t change it”
Eliminate reactive maintenanceTrend FAILURE PROGRESS
Predictive vibration & oil analysis
www.sajetc.com
All Test of Your Oil www.sajetc.com
1. Elemental Analysis (Spectral Analysis) 2. Particle count, 3. Particle Shape Analysis 4. Parts per million (PPM) distribution , 5. ISO codes and ASTM standard 6. Ferrography 7. Oil Chemistry ( Dielectric, TBN, TAN, Oxydation,
Nitration, Sulfations, Soot etc.)8. Water-in-oil, 9. Viscosity 10.Wear Debris Analysis (WDA)
Wear Metals and Possible SourcesEngine Bearing Gear Transmission Hydraulic
System
Heat Exchanger Compressor Turbine
Iron
Cylinder Liners, Piston Rings, Valve train, Crankshaft, rocker arms, spring gears, lock washers, nuts,
pins, connecting rods, Engine Blocks, Oil
pump
Rolling element Bearings: rollers
(tungsten alloyed steel), raceways and
cages, Journal Bearings:
Journal shaft, bearing Shoe backing
Locking keys
Bull gears, pinions, case
hardened teeth, locking
pins
Gears, bearings, Brake bands, clutch, shift spools, pumps, power take off (PTO)
Pump, motor, vanes, pump
housing, cylinder bores and rods,
servo valves, pistons
Rotary Screw, lobes, vanes, connecting rods, rocker arm,
bearings, cylinders, housing, shafts, roller bearings (see above)
oil pump, piston rings
Reduction gear, shaft, bearings,
piping, case
Copper
Valve train bushing, Wrist pin bushing, Cam bushings, Oil
Cooler core, Thrust washers, governor,
connecting rods bearings, valve gear train thrust buttons
Rolling element Bearings: alloyed element in cages, Journal Bearings:
journal bearing pads, slinger rings,
Locking keys
Bushings, thrust washers
Clutches, steering discs, bearings
Pump thrust plates, bushings,
cylinder gland guides, pump
pistons, oil coolers
Cooler tubes, baffles, plates
bearings, cylinder guides, wear plates,
thrust washers, bearings (see above) oil pump, oil coolers,
thermostats, separator filters
Bearings (see bearing section) piping, coolers
Tin
Valve train bushing, Wrist pin bushing, Cam bushings, Oil
Cooler core, Thrust washers, governor,
connecting rods bearings, valve gear train thrust buttons
Rolling element Bearings: alloyed element in cages, Journal Bearings:
journal bearing pads (babbited)
Bushings Clutches, steering discs, bearings
Pump thrust plates, bushings, Can be a residue from catalyst in
some oils (Quinto lubric series)
bearings, separator filters
Bearings (see bearing
section) piping, coolers
Aluminum
Engine blocks, pistons, blowers, Oil pump bushings, bearings
(some) Cam bushings(some) , Oil
coolers (some)
Rolling element Bearings: alloyed element in cages, Locking keys
Bushings, thrust washers, grease contamination
Bushings, clutches Cylinder gland (some) pump,
motor pistons, oil coolers.
Aluminum complex grease contaminant
Cooler tubes, baffles, plates
Housing, bearings, cylinder guides, wear
plates, thrust washers, bearings (see above), oil pump, oil coolers
Bearings(see above) piping, coolersEHC Systems: Residue from synthetic media (alumina) filters
33
www.sajetc.com
Wear Metals and Possible Sources (Cont.)
Engine Bearing Gear Trans-mission Hydraulic System
Heat Exchanger
Compressor Turbine
Chrome Rings, Liners, exhaust valves, zinc chromate from cooling system inhibitor
Rolling element Bearings: alloyed /coated element in rollers, tapers
Bearings(some), shaft coatings, some special gears are chrome plated
Bearings, water treatment
Cylinder liners, rods, spools
Housing, bearings, cylinder guides, wear plates, thrust washers, bearings (see above), oil pump, oil coolers
Shaft coating (some) bearings
Lead Main Bearings, connecting rod bearings.Lead can be present as a contaminant from Gasoline (Leaded gas) (Octane improver, anti-knock compound)
Rolling element Bearings: alloyed element in cages, Journal Bearings: Major alloying element in Babbitt bearings, alloying elements
Bearings, can also be red lead paint flakes from gear case walls
Bearings Bearings Bearings
Silicon Engine blocks (alloying element with aluminum parts), ingested dirt from breathers, external sources. Can also be from defoamant additive in lubricant
Rolling element Bearings: alloyed element with aluminum in cages
Bushings, thrust washer, silicone sealant, defoamant additive
Brake shoes, clutch plates, ingested dirt
Elastomeric seals (some) pump, motor pistons, oil coolers
Ingested dirt, silicone sealant, bearings, cooler (alloyed with aluminum)
Ingested dirt, silicone sealant, defoamant additive
Silver Bearings (alloying element) wrist pins, turbochargers (EMD railroad engines)
Bearings, oil coolers
Baffle & tube solder
Nickel Valves, Valve guides, Cylinder liners, Bearings. Can also be from heavy fuel contamination
Rolling element Bearings: alloyed element in rollers, races
Alloying element for tool steel gears
Bearings, servo valve plating pumps, pistons
Bearings Bearings, shaft, reduction gears
34
www.sajetc.com
Other Wear Metals and Metallic Additives
Element Possible Sources in Additives
Sodium Corrosion inhibitor additive, also indicates coolant leak into oil, can also be road Salt, Sea water, Ingested Dirt
Boron Corrosion Inhibitor additive, Antiwear/Antioxidant additive, can indicate coolant leak, grease contamination
Magnesium Detergent/dispersive additive, can also be alloying element in steels
Calcium Detergent/dispersant additive, Alkaline reserve additive for high sulfur fueled engines, can be grease contamination,
Molybdenum Solid/liquid antiwear additive, alloy in bearing and piston rings
Barium Corrosion inhibitors, Detergents, Rust inhibitors
Zinc Anti-wear, Corrosion inhibitors, Anti-oxidants, alloying element for bearings, thrust washers, galvanized cases
Phosphorus Anti-wear, Corrosion inhibitors, Anti-oxidants additives, EP additives
Element Possible Wear Sources
Titanium Wear metal for aircraft engines, bearings, Can also be contaminant from paint (titanium dioxide)
Vanadium Fuel Contaminant, can also be alloying element for steel
35
www.sajetc.com
www.sajetc.comFerrography
Optical Particle Counting Techniques
Readout & Control
Laser
View Volume
PhotoDiode
Laser Beam
Light Blocking
Oil Flow
Readout & Control
Light Scattering
Laser
Scattered Light
Lens
PhotoDiode
Laser Beam Trap
Oil Flow
Laser
Oil Flow
Direct Imaging
CCDLens Display
37
www.sajetc.com
38
Particle Counting Classifications• The count is compared to known standards
• ISO 4406 • NAS 1638(out of service, but still widely quoted)• AS 4059• MIL-STD-1264• and many other internal industry methods
• Two types of counting method • Cumulative• Differential
MOST POPULAR
38
www.sajetc.com
Particle Counting Reporting Codes
• A particle counting code is simply an arbitrary number given for a sample that represents a particle count range for a given size range
• In ISO 4406, code increases when the particle population is ~ doubled from the previous range
39
www.sajetc.com
• 60+ Brands, 400+ oils, 30+ fine tuned calibration algorithms and growing• Synthetic, Mineral Fluid, Biodiesels, etc• Comprehensive oil match algorithm to expand new oil library in the field
Engine Hydraulic Synthetic Gas Turbine
Compressor/ transmission
Gear/Turbine
Water (ppm)
Oxidation (abs/mm2)
TAN (mg KOH/g)
TBN (mg KOH/g)
Alien fluid (%)
Anti-Oxidant Additive (%)
Anti-wear Additive (%)
Nitration (abs/mm2)
Sulfation (abs/mm2)
Soot (%)
Glycol (%)
FT-IR Oil Analyzerwww.sajetc.com
Wear Debris Analysis www.sajetc.com
PLATELETS:Two dimensional particles produced by metal to metal sliding.
SPHERICAL:Produced by bearing fatigue or by lubrication failure resulting in local overheating.
SPIRALS:Similar in appearance to machining swarf, and are produced by a harder surface abrading into a softer
CHUNCKY:Produced by a fatigue mechanism
WDA Imageswww.sajetc.com
Sliding Wear• Severe sliding wear commences
when the wear surface stresses become excessive due to load and/or speed.
• Many sliding wear particles have surface striations as a result of sliding.
• Severe sliding wear starts with particles greater than 15 µm.
Catastrophic Sliding WearSevere Sliding with Lubrication Starvation
Severe Sliding Wear
43
www.sajetc.com
Three Body Abrasive Wear
“Soft” Surface
“Hard”Surface
Hard abrasive contamination
Cutting wear particle
44
www.sajetc.com
45
Surface Damage due to Hard Particles
45
www.sajetc.com
Spheres
Spheres generated from an extraneous source such as a welding or grinding process. These spheres are much larger than those generated by bearing fatigue.
Spheres generated by a fatiguing bearing < 5 microns46
www.sajetc.com
Demonstration on Oil Analysis Technology
www.sajetc.com
FluidScan Viscosity Meter
www.sajetc.com
FluidScan
Thermography
Infra Red Thermography is a technique for producing a visible image of invisible (to our eyes). Infra red radiation emitted by objects due to their thermal conditions. The amount of radiation emitted by an object increases with temperature; therefore, thermography allows one to see variations in temperature.
www.sajetc.com
www.sajetc.comWhy Thermography?
• Non Contact• Rapid Scanning• Data can be recorded in differing formats• Images produced are comprehensive & reliable
Advantages• Non Contact• Non Intrusive• Can work at a distance• Fast and Reliable• Portable• Convincing Results
www.sajetc.com
SEE THE IMAGE, SEE THE TEMPERATURE
SEE THE TEMPERATURE, SEE THE PROBLEM
www.sajetc.comThe Motto of Thermal Imaging
Thermal Images
Electrical
• Switch Gear• Fuse boxes• Cable runs• Electrical connectors• Insulation• Transformers
www.sajetc.com
Fan
18.7°C
37.4°C
20
25
30
35
AR01
www.sajetc.com
Fuse Box
23.3°C
38.1°C
25
30
35
LI01
www.sajetc.com
Electrical Connections
Used for the detection of;
• Corroded connections• Slack / loose connectors• Connectors at too high an
operating temperature• Hot spots
www.sajetc.com
Electronics www.sajetc.com
Electric Motor Bearing www.sajetc.com
Electrical Motor www.sajetc.com
High Voltage Substation www.sajetc.com
Process Plant
• Hot spots• Cold spots (Cryogenics)• Damaged or missing
insulation• Tank levels
www.sajetc.com
What’s In Your PDM Toolbox?
• One Technology CAN NOT do Everything!!!!!!
• Successful Integration is the key to getting the most out of your resources:– Awareness – Proper training – Documentation
www.sajetc.com
Ultrasound Analysis
www.sajetc.com
What is Ultrasound
High frequency (ultrasound) sound Waves range in size from 1/8” (0.34 cm) To 5/8” (1.7 cm)(Assuming ultrasound range from 20 khz-100khz)
Low frequency sound waves range in size from 3/4” (1.88 cm) to 56’ (16.9 m)(Assuming the average hearing range from 20Hz to 20KHz)
www.sajetc.com
Advantages of Ultrasound
•Directional•Locatable•Multiple applications•Utilizable in all environments•Early warning failure indication•Supports other technologies
www.sajetc.com
Application Groups
• Leak detection– Compressed air– Specially gasses– Vacuum– Steam traps / valves
• Electrical Inspection• Mechanical Inspection
– Slow speed bearings– Lubrication
www.sajetc.com
69
Ultrasonic Leak Detector
• Locate the leak• Measure the Leak• Calculate costs• Calculate Greenhouse Gas
emission reduction
www.sajetc.com
How Leaks Develop
• Fluid: Liquid or gas• Turbulent Flow
Produces Ultrasound
PRESSURE
VACUUM
www.sajetc.com
Good Valve – Bad Valve www.sajetc.com
Electric Inspection• Switchgear• Transformers• Insulators• Relays• Breakers
26.8
24.4
*>28.4°F
*<23.0°F
23.0
24.0
25.0
26.0
27.0
28.0
www.sajetc.com
Electric inspection
• Corona• Tracking• Arcing
• Good for medium and high voltage
26.8
24.4
*>28.4°F
*<23.0°F
23.0
24.0
25.0
26.0
27.0
28.0
www.sajetc.com
Bearing Inspection
• Very effective on S L O W S P E E D !• 3 Types of testing performed
– Comparison– Historical Trending– Spectrum Analysis:
• Fault frequency identification
UE SYSTEMS INC. All Rights Reserved
www.sajetc.com
Levels of SeverityDb levels over baseline
8 db LUBRICATION
12 db minor damage-microscopic faults
16 db damage-visual faults
35+ db catastrophic failure imminent
UE SYSTEMS INC. All Rights Reserved
www.sajetc.com
What’s In Your PDM Toolbox?
• One Technology CAN NOT do Everything!!!!!!
• Successful Integration is the key to getting the most out of your resources:– Awareness – Proper training – Documentation
www.sajetc.com
www.sajetc.com