粉末冶金涡轮盘破裂转速分析与验证  

Burst speed analysis and verification of the powder metallurgy superalloy turbine disk

作　　者：秦仕勇 冯引利 孙海鹤 何云 QIN Shi-yong;FENG Yin-li;SUN Hai-he;HE Yun(AECC Sichuan Gas Turbine Establishment,Chengdu 610500,China)

机构地区：[1]中国航发四川燃气涡轮研究院,成都610500

出　　处：《燃气涡轮试验与研究》2017年第5期36-41,共6页Gas Turbine Experiment and Research

基　　金：国家高技术研究发展计划(2015AA034401)

摘　　要：结合改进前粉末冶金涡轮盘的破裂情况、断口分析和破裂转速分析方法,从提高总体强度、降低局部应力和应变、降低残余变形、控制加工工艺等方面,采取增大倒圆、增加辐板厚度等方法对粉末合金涡轮盘进行了结构和工艺上的改进。通过对比分析改进前后涡轮盘的局部应力应变、整体屈服强度储备和残余变形,及后续的涡轮盘破裂转速试验均表明,本文采取的改进措施效果明显,能显著降低破裂位置处的局部应力、提高径向屈服强度及降低盘缘残余变形。Combined with the powder metallurgy superalloy turbine disk rupture,fracture analysis and the burst speed analysis method,the structure and process of turbine disk were improved through increasing the overall strength,reducing the stress,strain as well as the residual deformation,and controlling the processing technology by means of enlarging the rounding and thickening the web.The local stress and strain,overall yield strength margin and residual deformation of turbine disk before and after improvement were compared and analyzed along with the burst speed verification test.The test results show that improvement measures are effective to reduced the local stress in rupture,increase the radial residual strength and reduce the residual deformation at rim.

关 键 词：航空发动机 涡轮盘 破裂转速 局部应力和应变 残余变形 

分 类 号：V231.91[航空宇航科学与技术—航空宇航推进理论与工程] V232.2