1. Looseness or? Bill Kilbey
WWTF Blower
Looseness or?
Bill Kilbey

2. Overall vibration increasing motor

3. Overall increasing on blower

4. Motor

5. High resolution on motor

6. 2x TS/2x LF

7. 1x TS Modulation of RBPF

8. Blower

9. Hi res blower inbd vert
Note the sideband modulation. Caused by load or driver?

10. Bearing defects on blower?
Very close to BPFO for 6314 bearing.

11. Modulation of 4.5 Hz (.225 sec. approx.)

12. Peak List
PEAK FREQUENCY PEAK ORDER
NO. (CPM) VALUE VALUE
The red highlight peaks are sidebands. Diff. of .076 orders (271.5 CPM/4.5 Hz) Not discrete non-synch bearing freqs.

13. Review of observations
Blower has audible beat
Looseness in motor and blower
High 1x TS from imbalance/misalignment
Modulation on blower and motor
Is it load/process related or driver (motor) related?

14. Motor closer look…
Audible beat and sidebands may be related to rotor problems.
Slip is .44 Hz, sidebands on motor at .88 = # of poles * slip = .44 * 2
MCSA will be performed next week.

15. Sidebands at pole pass

16. Log Scale