焊接修复汽轮发电机转子铝合金叶片接头强度校核
Strength Checking for Welded Joint of Aluminium Alloy Blade Used in Turbo Generator
张乔斌1， 熊 征2
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作者单位：（1.海军工程大学 科研部，湖北 武汉 430033；2.海军工程大学 基础部，湖北 武汉 430033）
中文关键字：强度校核； 焊接接头； 汽轮机叶片； 铝合金
英文关键字：strength checking; welded joint; turbo generator blade; aluminium alloy
中文摘要：为了评估焊接修复汽轮发电机转子铝合金叶片接头强度的可靠性，基于空气动力学理论，分析和计算了由离心力与空气升力在旋转运动叶片TIG焊接接头上产生的拉伸应力，并进行强度校核。强度校核表明，用SalSi-l铝合金焊丝形成的焊接接头安全许用应力大于接头受到的拉伸应力，焊接接头安全可靠。本分析方法为旋转体焊接接头强度校核提供了一定理论基础。
英文摘要：For assessing the safety of welded joint of aluminium alloy blade used in turbo generator, the tensile stress of welded joint caused by centrifugal force and air lift acting rotation blade was calculated according to the basic theories of the aerodynamicist. Based on the results, the tensile strength of the welded joint by TIG is conducted by strength checking. The permissible stress of TIG joint welded with SAlSi-1 aluminium alloy wire is larger than the bearable stress in the welded zone. The repaired blade is safe. The analysis method provides some theories foundation for the safe assessment on welded joint strength in rotation blade.