Abnormal vibration at the exhaust end of the turbine
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Abnormal vibration occurred at the exhaust end of the back-pressure turbine, but it returned to a stable state within a few minutes. When the vibration level at the exhaust side rises abnormally, the vibration level at the intake side remains low. What’s the reason? ? Please, experts, help me solve this!
What about the changes in flow rate and temperature before and after the vibration? . . There are also changes in the flow rate and pressure of the air compressor. Fault diagnosis requires systematic investigation and analysis.
It depends on the turbine structure; in our plant, turbine 1# has a vertical deviation of 15um and a horizontal deviation of 55um, while turbine 2# has a vertical deviation of 12um and a horizontal deviation of 24um. The rotation speed is 4050
In this case, random vibration should be considered, but the specific cause can only be determined by taking into account the operating conditions and diagnostic patterns