A gearbox in a power generation plant was experiencing high vibration levels, leading to concerns about its reliability. A vibration analysis was conducted using a vibration analyzer. The results showed a high level of vibration at 2 times the gear mesh frequency (2x GMF). This indicated a potential problem with misalignment of the gearbox. Upon inspection, it was found that the gearbox was indeed misaligned, causing the gears to mesh improperly. The gearbox was realigned, and the vibration levels returned to normal.
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Vibration analysis detected an impact matching the inner raceway defect frequency . A gearbox in a power generation plant was