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某发动机高压Ⅱ级涡轮盘封严篦齿裂纹分析 被引量:3

Cracks Analysis of Sealing Labyrinth on High-pressure Turbine Disc Ⅱ in an Aero-engine
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摘要 某发动机高压Ⅱ级涡轮盘封严篦齿在试车后的分解检查中发现有裂纹显示。本文对裂纹分布、形貌及断口特征进行了观察,对封严篦齿的硬度和金相组织进行了检测,分析了裂纹性质和形成原因。结果表明,封严篦齿上的裂纹为热疲劳裂纹,裂纹的形成主要与第三封严篦齿附近的温度场有关。 After testing drive, an aero-engine was overhauled and some cracks were found on the sealing labyrinth of the high-pressure turbine disk Ⅱ. Observations were performed on the distributions and appearances of the cracks and the fracture surface morphology as well as the hardness and the metallographic characteristics of sealing labyrinth. The kind and the cause for such cracks were analyzed. The results show that the cracks on the sealing labyrinth are heat-fatigue cracked resulted by the temperature field around the third tooth of the sealing labyrinth.
出处 《失效分析与预防》 2006年第3期27-29,53,共4页 Failure Analysis and Prevention
关键词 封严篦齿 裂纹 热疲劳 sealing labyrinth crack heat fatigue
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参考文献2

  • 1陶春虎 钟培道 等.航空发动机转动部件的失效与预防[M].北京:国防工业出版社,2000..
  • 2马重辉,吕传福,汪默宁等.八种耐热钢及高温合金的燃气疲劳性能[J].中国腐蚀与防护学报,1981,1(1):45-48.

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