Analysis and Research on Magnetic and Eccentric Characteristics of CRDM Motor
-
摘要: 核电厂反应堆的控制棒驱动机构（CRDM）采用同步电机作为机电能量转换的关键部件，电机的单边径向磁拉力会导致电机转子轴系变形，并加剧轴承的磨损，对CRDM寿命和核反应堆运行可靠性产生重要影响。本文分析了CRDM电机径向静偏心、径向动偏心、倾斜偏心的机理，并建立了径向磁拉力、轴向磁拉力计算的数学模型，分析获得了径向磁拉力、轴向磁拉力的变化规律以及与偏心量的关系，结果表明CRDM电机的径向磁拉力相对轴向磁拉力显著较大，并且与转子中心偏心量呈线性正比关系，与转子两端最多倾斜偏心量呈非线性正比关系，所得结论能够为CRDM电机优化改进和轴系结构设计提供指导和依据。
-
关键词:
- 控制棒驱动机构（CRDM） /
- 同步电机 /
- 磁拉力 /
- 偏心
Abstract: Control Rod Drive Mechanism (CRDM) of the nuclear power plant reactor uses synchronous motor as the key component for electromechanical energy conversion. The unilateral radial magnetic pull of the motor would lead to deformation of motor shaft system and aggravate the bearing wear, which has an important influence on the life of CRDM and the reliability of nuclear reactor operation. In this paper, the mechanism of radial static eccentricity, radial dynamic eccentricity and inclined eccentricity of CRDM motor is analyzed, and the mathematical models for calculating radial and axial magnetic pull are established. The variation rules of radial and axial magnetic pull and their relationship with eccentricity are obtained. The result shows that radial magnetic pull is significantly larger than axial magnetic force for CRDM motor, and is linearly proportional to the eccentricity of the rotor center and nonlinearly proportional to the maximum tilt eccentricity at both ends of the rotor. The conclusion can provide guidance and basis for the optimization and improvement of CRDM motor and shaft system structure design.-
Key words:
- CRDM /
- Synchronous motor /
- Magnetic pull /
- Eccentricity
-
图 1 电机转子径向偏心示意图
α—转子气隙计算时的方位角；δ—转子在角度α方位的气隙长度；r—转子中心偏心量
Figure 1. Sketch of Radial Eccentricity of Motor Rotor
图 3 静偏心径向磁拉力F随时间的变化曲线
Figure 3. Variation Curve of Static Eccentric Radial Magnetic Pull F with Time
图 4 径向磁拉力F与偏心量r的关系
Figure 4. Relationship between Radial Magnetic Pull F and Eccentricity r
图 5 动偏心时径向磁拉力随时间的变化
Figure 5. Variation of Radial Magnetic Pull with Time under Dynamic Eccentricity
-
[1] 于天达,杨方亮,陈西南,等. 控制棒驱动机构用同步磁阻电机低速运转平稳性研究[J]. 机械设计与制造工程,2016, 45(12): 91-96. doi: 10.3969/j.issn.2095-509X.2016.12.022 [2] 谢细明,彭航,邓强,等. 基于电感测量的同步磁阻电机转子偏心监测研究[J]. 自动化与仪器仪表,2018(12): 8-11. [3] 谢细明,彭航,张倬,等. 核反应堆控制棒驱动机构动作部件状态检测研究[J]. 核动力工程,2019, 40(2): 90-94. [4] 胡友秋, 程福臻. 电磁学与电动力学: 下册[M]. 第二版. 北京: 科学出版社, 2014: 81. -
下载:
计量
- 文章访问数: 389
- HTML全文浏览量: 93
- PDF下载量: 25
- 被引次数: 0
