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Turbine Bearing Wiped on Coastdown: Cause Analysis Vibration Institute Annual Technical Symposium 2013

机译:涡轮轴承滑行时擦:原因分析振动研究所年度技术研讨会2013

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During coastdown metal temperature of the short elliptical bearing supporting LP section of a large steam turbine spiked from 122 deg F to 200 deg F at speed of 235 RPM. Upon disassembly the bearing was found wiped. Journal roughness was evaluated as being marginal and decision has been made to hone the journal in place. Journal roundness and taper were found to be within tolerance. Original journal diameter is 20.000 inch, after honing -19.9964 inch. A few major grooves were left in the journal in order to avoid significant diameter reduction.
机译:在海岸金属温度期间,短椭圆形轴承支撑LP段的大型蒸汽涡轮机以235rpm的速度从122°F至200 deg f旋转。在拆卸时,发现轴承擦拭。期刊粗糙度被评估为边际,决定已经磨练了日志。杂志圆润和锥度被发现在宽容之内。珩磨后,原始日记直径为20.000英寸-19.9964英寸。在日记中留下一些主要凹槽,以避免显着的直径减小。

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