大电机技术
大電機技術
대전궤기술
LARGE ELECTRIC MACHINE AND HYDRAULIC TURBINE
2013年
3期
57-58
,共2页
李雅范%宋丹%姬书得%高秀玲%刘雪松%方洪渊
李雅範%宋丹%姬書得%高秀玲%劉雪鬆%方洪淵
리아범%송단%희서득%고수령%류설송%방홍연
水轮机转轮%局部加热%焊接%残余应力
水輪機轉輪%跼部加熱%銲接%殘餘應力
수륜궤전륜%국부가열%한접%잔여응력
Kea words:turbine runner%local heating%welding%residual stress
本文对数值模拟计算优化后的焊接工艺进行了真机转轮焊接及试验验证,验证结果表明:采用局部加热法,如果加热温度,加热时间及加热区域选择适当,可以大大地降低叶片危险区域残余拉应力,从而有效地降低转轮开裂风险.
本文對數值模擬計算優化後的銲接工藝進行瞭真機轉輪銲接及試驗驗證,驗證結果錶明:採用跼部加熱法,如果加熱溫度,加熱時間及加熱區域選擇適噹,可以大大地降低葉片危險區域殘餘拉應力,從而有效地降低轉輪開裂風險.
본문대수치모의계산우화후적한접공예진행료진궤전륜한접급시험험증,험증결과표명:채용국부가열법,여과가열온도,가열시간급가열구역선택괄당,가이대대지강저협편위험구역잔여랍응력,종이유효지강저전륜개렬풍험.
@@@@Process of welding which is optimized by means of numerical simulation is verified during welding and testing. The results show that welding residual tensile peaking stress in dangerous area of blades can be decreased greatly by local heating if choice of heating temperature, heating time and heating location are appropriate, furthermore, cracking risk of the runner can be decreased obviously.
