大型水电机组全装配铸造活动导叶相控阵检测可行性研究  

Feasibility Study on Phased Array Test of Completely Assembling Casting Movable Guide Vane for Large Hydropower Unit

作　　者：李阳 邓韬 LI Yang;DENG Tao(China Energy Science and Technology Research Institute Co.Ltd.,Chengdu 610073,China)

机构地区：[1]国家能源集团科学技术研究院有限公司,四川成都610073

出　　处：《水电能源科学》2023年第9期168-171,共4页Water Resources and Power

摘　　要：国内早期投产的大型水电机组活动导叶多采用砂型铸造件,呈大型化异形件,处于机组空间狭小的水车室,针对在役大型水电机组活动导叶套装在轴套中埋藏区域的无损检测普遍在机组大修解体活动导叶吊出后检测的困境,采用相控阵检测技术,通过建模仿真、模拟试块测试,并在实际检测中成功应用,解决了铸造活动导叶粗晶、大声程、异形件对声能衰减和损失严重,无法接收到缺陷回波的难题,验证了在役大型水电机组全装配状态铸造活动导叶埋藏区域无损检测的可行性。The movable guide vane of domestic large hydropower units in early stage was mostly made by sand casting,which had the characteristics of large abnormal shape parts and they were located in the water wheel room of the units with narrow space.At present,the nondestructive testing of the area where the movable guide vane is hided in the shaft sleeve of large hydropower unit in service is generally carried out after the movable guide vane is lifted out during the unit overhaul period.This paper attempts to test it though phased array testing technology,modeling simulation and simulated test block test.This method is successfully applied in actual detection.Finally,the problem that coarse crystal,long sound path and abnormal shape of casting movable guide vane have serious attenuation,loss of sound energy,and difficulty in receiving defect echo is solved.The feasibility of nondestructive detection on the hided area of casting movable guide vane in completely assembling state of large hydropower units in service is verified.

关 键 词：相控阵 铸造活动导叶 全装配 埋藏区域 可行性 

分 类 号：TM312[电气工程—电机] TV734.1[水利工程—水利水电工程]