CS06: Inappropriate Operation During Mechanical Running Test of a High-Pressure Compressor Equipped With an Hole Pattern Seal
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Date
2021
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Turbomachinery Laboratory, Texas A&M Engineering Experiment Station
Abstract
 During the mechanical running test of a HP centrifugal compressor, the rotorexperienced a sudden increase of the radial vibrations During run-down thecompressor experienced a trip and high vibrations were recorded The RCA revealed: for the manufactured clearance of the hole pattern seal thetemperature level and the gradient of the pressure and temperature during the startup was too high A new hole pattern seal sleeve was manufactured with increased clearances Theduration of the start-up was increased in order to decrease the temperature gradientAfter reassembly no high vibration appeared anymore Generally: Operation during the mechanical test (especially at trip speed) requirescareful attention if high discharge gas temperature is expected
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