发电-电动机转子不同磁极引线的应力分布与疲劳特性对比研究
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摘要
磁极极间连接线是发电-电动机转子的关键部件,合理的引线方式可有效避免大型发电-电动机运行过程中由于工况频繁切换引起的磁极连接线熔断等故障。针对该问题,采用有限元法对3种典型磁极引线连接方式进行了分析,详细计算额定转速为300 r/min和500 r/min的2台电机的3种磁极连接结构的应力和疲劳情况。结合疲劳分析结果,指出适用于高转速发电-电动机磁极连接线典型结构,并给出发电-电动机磁极连接线设计方面的建议。研究成果可为抽水蓄能电站发电-电动机极间连接线选型及运行维护提供支持。
Pole connection was the key component of the rotor of generator-motor synchronous machines.Reasonable connection structure could effectively avoid the pole connection fusing fault caused by the frequent switch of operation conditions of generator-motor synchronous machines. For this purpose,three typical pole connection structures were analyzed by finite element method. And the stress and fatigue data of the three structures under the conditions of rated speed 300 r/min and 500 r/min were also calculated precisely. Combined with fatigue analysis result,the typical structure of pole connection of high-speed generator-motor synchronous machines was proposed,and the suggestion of design scheme was also presented. The research results could provide an important technique support for the selection of pole connection and operation maintenance of pumped-storage power stations.
Pole connection was the key component of the rotor of generator-motor synchronous machines.Reasonable connection structure could effectively avoid the pole connection fusing fault caused by the frequent switch of operation conditions of generator-motor synchronous machines. For this purpose,three typical pole connection structures were analyzed by finite element method. And the stress and fatigue data of the three structures under the conditions of rated speed 300 r/min and 500 r/min were also calculated precisely. Combined with fatigue analysis result,the typical structure of pole connection of high-speed generator-motor synchronous machines was proposed,and the suggestion of design scheme was also presented. The research results could provide an important technique support for the selection of pole connection and operation maintenance of pumped-storage power stations.
引文
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[2]王小飞,代颖,罗建,等.电动汽车牵引用水冷异步电机耦合场分析[J].电机控制与应用,2018,45(4):110-116.
[3]孙雪,代颖,王小飞,等.高速异步电动机转轴的疲劳特性分析[J].电机控制与应用,2018,45(3):97-103.
[4]张忠明,邓智泉,孙权贵,等.铜屏蔽层对高速永磁无刷直流电机转子涡流损耗和应力的影响分析[J].中国电机工程学报,2018,38(8):2476-2485.
[5]刘晶石,姜铁良,庞立军,等.水泵水轮机导叶卡门涡数值模拟研究[J].大电机技术,2018,48(1):71-74.
[6]戚彩梦,葛光男,郑吉伟,等.混流式水轮机叶片性能热处理变形的数值模拟预测[J].大电机技术,2018,48(3):33-36.
[7]刘娅娟,张伟,洪玉萍,等.水轮发电机转子磁极悬挂动应力研究[J].大电机技术,2012,42(4):1-5.
[8]李俊卿,王罗,李永刚,等.水轮发电机励磁绕组匝间短路转子热应力计算与分析[J].电机与控制应用,2018,45(8):116-123.
[9]杨斌.柳洪水电站发电机转子磁极引线损坏的原因分析及处理[J].华中电力,2010,23(4):53-54.
[10]兰波,刘福,王建刚,等.高转速发电电动机极间连接线疲劳寿命分析[J].大电机技术,2015,45(2):10-13.