Research Article
Experimental Aspects in the Vibration-Based Condition Monitoring of Large Hydrogenerators
Table 2
Typical shaft relative and bearing absolute vibrations in the upper journal bearing of a LHG.
| Date | Power 
| Shaft relative vibration [] | Bearing absolute vibration [mm/] | -direction | -direction | -direction | -direction | Peak | 1x | 2x | Peak | 1x | 2x | RMS | 1x | 2x | RMS | 1x | 2x |
| 04.03.09 | 522 | 63 | 23 | 0 | 80 | 44 | 3 | 0.13 | 0.01 | 0.00 | 0.13 | 0.03 | 0.00 | 04.07.09 | 583 | 66 | 26 | 0 | 79 | 45 | 3 | 0.11 | 0.04 | 0.00 | 0.11 | 0.01 | 0.01 | 04.14.09 | 694 | 67 | 23 | 0 | 65 | 35 | 3 | 0.14 | 0.04 | 0.00 | 0.14 | 0.01 | 0.00 | 04.22.09 | 680 | 64 | 23 | 0 | 63 | 32 | 2 | 0.13 | 0.00 | 0.00 | 0.14 | 0.03 | 0.00 | 04.29.09 | 682 | 56 | 12 | 0 | 59 | 26 | 4 | 0.13 | 0.00 | 0.00 | 0.14 | 0.03 | 0.01 | 01.06.10 | 638 | 61 | 32 | 1 | 83 | 46 | 3 | 0.16 | 0.01 | 0.00 | 0.15 | 0.05 | 0.00 | 01.14.10 | 617 | 60 | 32 | 2 | 81 | 46 | 2 | 0.13 | 0.01 | 0.01 | 0.13 | 0.05 | 0.00 | 01.21.10 | 474 | 57 | 28 | 2 | 76 | 42 | 2 | 0.10 | 0.01 | 0.00 | 0.10 | 0.05 | 0.00 | 01.22.10 | 629 | 62 | 30 | 1 | 83 | 44 | 2 | 0.15 | 0.00 | 0.00 | 0.14 | 0.05 | 0.00 | 01.28.10 | 552 | 58 | 29 | 2 | 73 | 40 | 3 | 0.11 | 0.01 | 0.00 | 0.11 | 0.05 | 0.00 |
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