电动机停机温度与电动机寿命关系研究
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摘要
电动机是不均质体,这种不均质体的定子、转子的构成材料多达十几种,各种材料间因温度快速变化而胀或缩,产生应力和相对移动,从而在电动机定子、转子内部产生间隙、空隙或裂缝,导致绝缘降低,并在电磁力的作用下进一步恶化,影响电动机使用寿命。为此,分析电动机发热和散热的过程,并探讨在电动机停机后和起动前的时间段内,对电动机停机温度采取措施,实施精细管理和精准管理,从而提高电动机使用寿命。
Motor is an inhomogeneous body,and there are more than ten kinds of composing materials of its stator and rotor. The materials in electric motor will expand or shrink due to sudden changes in temperature,which generates stresses and relative movements. Thus rotor gaps,voids or cracks are generated within the stator and rotor,which reduces the motor insulation,and leads to further deterioration under the function of the electromagnetic force,shortening the service life of the motor. Therefore,to analyze the process of heat generation and dissipation,take measures to motor shutdown temperature after the motor shutdown and before the starting,and implement fine and accurate management to the motor,are helpful to improve the motor life.
Motor is an inhomogeneous body,and there are more than ten kinds of composing materials of its stator and rotor. The materials in electric motor will expand or shrink due to sudden changes in temperature,which generates stresses and relative movements. Thus rotor gaps,voids or cracks are generated within the stator and rotor,which reduces the motor insulation,and leads to further deterioration under the function of the electromagnetic force,shortening the service life of the motor. Therefore,to analyze the process of heat generation and dissipation,take measures to motor shutdown temperature after the motor shutdown and before the starting,and implement fine and accurate management to the motor,are helpful to improve the motor life.
引文
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[3]李超.集磁式OCS磁特性随温度变化的研究[J].电工技术学报,2015,30(8):45.
[4]沈鸿,郑时伊,赵可盖,等.电气工程师手册[M].北京:机械工业出版社,1987.
[5]MAMIKONYANTS L G.已运行多年的汽轮发电机寿命的延长及可靠性的提高[J].王绍禹,译.国外大电机,2007(4):23.
[6]苑蓉.一种预估计直流微电机寿命的方法[J].微特电机,2006,39(3):101.
[7]陈飞文.发电机外部“定子接地”故障分析及处理[J].电气技术,2013,14(11):58.
[8]王毓东.电机学[M].杭州:浙江大学出版社,2002.
[9]吴涛.基于“排序法”对发电机温度监控的开发与应用[J].电气技术,2015,16(3):62.
[10]王静爽.电机的停机温度节能控制保护方法:中国,200810183076.7[P].2010-06-23.
[11]杨庆申.大中型电机的温度节能控制保护装置:中国,200820175354.x[P].2009-11-04.