Analysis on reason of fracture of coupler bolt between gas turbine and gas compressor

Abstract

Abstract: An accidental shutdown occurred in operation of the S109FA gas turbine of a power plant. By inspection, it was found that the coupler bolt between the gas turbine and the gas compressor fractured. According to analysis, the reason of the bolt fracture was determined as below, there was slight scratch on the bolt surface formed in transportation and installation processes, the element Cadmium gathered in the scratch area and caused the metal became brittle; and in operation, the too large vibration caused the crack extended and the bolt fractured at last.

Key words: S109FA gas turbine, gas compressor, coupler, bolt, vibration, fracture, reason analysis

QIAN Cheng. Analysis on reason of fracture of coupler bolt between gas turbine and gas compressor[J]. Huadian Technology, 2012, 34(S1): 47-49.

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Analysis on reason of fracture of coupler bolt between gas turbine and gas compressor

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