Condition monitoring

Moisture content Water can exist in oil in three states or phases .   Dissolve Water emulsified water Free Water   Dissolve Water :-   Dissolved water, is characterized by individual water molecules dispersed throughout the oil. Dissolved water in a lubricating oil is comparable to moisture in the air on a humid day - we know the water is there , but because it is dispersed molecule-by-molecule, it is too small to see. emulsified water . :- Once the amount of water has exceeded the maximum level for it to remain dissolved, the oil is saturated. At this point, the water is suspended in the oil in microscopic droplets known as an emulsion . Free Water :- free water accumulates at the bottom of the lube system. IMPACT OF WATER CONTAMINATION ON LUBRICANTS • The presence of water in a lubricating oil can cause the progress of oxidation to increase tenfold, resulting in premature aging of the oil, particularly in the presence of catalytic metals such as copper, lead and...

PARTICLE  COUNTING  Particle counting  is the technic used to monitor the solid contamination of new and in-service Oil. When implementing machine condition monitoring for machinery  lubricating oils , typically the first strategy you implement is contamination control.   Particle counting standards: which define permissible limit of contamination size and quantity in lubricating & hydraulic oil .  ISO 4406 Standard NAS 1638 standard ISO 4406 Standard: The ISO 4406/2000 classification of particle contents was introduced to facilitate comparisons in particle counting. Sudden breakdown in an oil system is often caused by large particles (>14 micron) in the oil while slower, progressive faults, e.g. wear and tear, are caused by the smaller particles (4-6 micron). This is one of the explanations why the particle reference sizes were set to 4 micron, 6 micron and 14 micron in ISO 4406/2000. A typical sample contains in every 100 ml of oil: 450,000 p...

Oil Analysis   What is analyzed in Lubricating oil & Hydraulic oil ?  Particle Counting Moisture Content WDA ( Wear Debris Analysis ) Ferrography TAN ( Total Acidic Number ) TBN ( Total Base Number ) Viscocity

What is Condition Monitoring? Condition monitoring is Technique to predict health condition of rotary machinery/equipment's we can understand this by the comparison of human body health check-up Technic like we take blood sample,  temperature, X-ray, ECG, UCG etc.  in the same way we take the sample of lubricant oil for analysis , we take temperature of bearings, we take vibration reading ( FFT & TWF spectrum) , Ultrasonic testing etc.  The purpose of all these things is only to predict the condition of the machine and further. so that reliability of machine to be good. Next we will talking about how do the condition monitoring - The main part of condition monitoring are  Oil Analysis  Vibration Analysis Thermography