High vibration does not mean bad Low vibration does not

Understand ISO-10816 High vibration does not mean bad Low vibration does not mean good

Question Machine-1 has vibration at 12 mm/s at 25 Hz speed, and overall vibration 18 mm/s Machine-2 has vibration at 3 mm/s at 12,5 Hz speed, and overall vibration 18 mm/s Machine-3 has vibration at 10 mm/s at 50 Hz speed, and overall vibration 18 mm/s Power/size all the same. Vibration in RMS value Case-1, Broadband frequency 2-15000 Hz Case-2, Broadband frequency 10-1000 Hz Case-1 Which machine is the best condition ? Case-2 Which machine is the shortest MTTF ? Which machine would give the highest MTTF ?

Agenda 1

Background, vibration severity chart ISO guidelines B

2

Sort of ISO vibration relates

3

Pump manufacturers apply ISO-10816

4

Understand ISO-10816-1

5

Conclusion

1. Background And many vibration Severity charts e.g. Crest engineering GD engineering IRD, Etc.

1. Background

2. Sort of vibration relates

Table-3

2. Sort of vibration relates

3. Pump manufacturers apply ISO-10816

Class-3

Class-2

3. Pump manufacturers apply ISO-10816

3. Pump manufacturers apply ISO-10816

3. Pump manufacturers apply ISO-10816

3. Pump manufacturers apply ISO-10816

4. Understand ISO-10816-1

4. Understand ISO-10816-1

4. Understand ISO-10816-1

Question Machine-1 has vibration at 12 mm/s rms at 25 Hz speed, and overall vibration 18 mm/s rms Machine-2 has vibration at 3 mm/s rms at 12,5 Hz speed, and overall vibration 18 mm/s rms Machine-3 has vibration at 10 mm/s rms at 50 Hz speed, and overall vibration 18 mm/s rms Power/size all the same. Case-1, Broadband frequency 2-15000 Hz Case-2, Broadband frequency 10-1000 Hz Case-1 Which machine is the best condition ? Case-2 Which machine is the shortest MTTF ? Which machine would give the highest MTTF ?

Answer Machine-1 has vibration at 12 mm/s at 25 Hz speed, and overall vibration 18 mm/s Machine-2 has vibration at 3 mm/s at 12,5 Hz speed, and overall vibration 18 mm/s Machine-3 has vibration at 10 mm/s at 50 Hz speed, and overall vibration 18 mm/s Power/size all the same. Vibration in RMS value Case-1, Broadband frequency 2-15000 Hz Case-2, Broadband frequency 10-1000 Hz Case-1 Which machine is the best condition ? Can’t point 1 or 2 Case-2 Which machine is the poorest condition ? Can’t point 2or 3 Which machine would give the highest MTTF ? Machine-2

Case -2 Which machine is the best condition ? Machine 1

5. Conclusion High vibration does not mean bad Low vibration does not mean good

Low vibration amplitude at high frequency is more dangerous than low frequency Low vibration at high damping is more dangerous than high vibration at low damping ISO-18016 is based on 3600 rpm at 1,7 factor of inertial mass. That indicates unacceptable condition, but when dismantle, it is still good condition.

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