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中型高压电机轴径向混合通风结构的强化散热特性模拟

彭德其 周晓辉 晏才松 李广

彭德其, 周晓辉, 晏才松, 李广. 中型高压电机轴径向混合通风结构的强化散热特性模拟[J]. 机械科学与技术, 2023, 42(1): 75-82. doi: 10.13433/j.cnki.1003-8728.20200611
引用本文: 彭德其, 周晓辉, 晏才松, 李广. 中型高压电机轴径向混合通风结构的强化散热特性模拟[J]. 机械科学与技术, 2023, 42(1): 75-82. doi: 10.13433/j.cnki.1003-8728.20200611
PENG Deqi, ZHOU Xiaohui, YAN Caisong, LI Guang. Simulation Study on Heat Dissipation Enhancement Characteristics of Axial and Radial Mixed Ventilation Structure for Medium-sized High-voltage Motor[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(1): 75-82. doi: 10.13433/j.cnki.1003-8728.20200611
Citation: PENG Deqi, ZHOU Xiaohui, YAN Caisong, LI Guang. Simulation Study on Heat Dissipation Enhancement Characteristics of Axial and Radial Mixed Ventilation Structure for Medium-sized High-voltage Motor[J]. Mechanical Science and Technology for Aerospace Engineering, 2023, 42(1): 75-82. doi: 10.13433/j.cnki.1003-8728.20200611

中型高压电机轴径向混合通风结构的强化散热特性模拟

doi: 10.13433/j.cnki.1003-8728.20200611
基金项目: 

湖南省战略性新兴产业项目 2019GK4021

详细信息
    作者简介:

    彭德其(1972-), 教授, 硕士生导师, 研究方向为过程强化与节能环保, pengshuaike@163.com

  • 中图分类号: TM301.4

Simulation Study on Heat Dissipation Enhancement Characteristics of Axial and Radial Mixed Ventilation Structure for Medium-sized High-voltage Motor

  • 摘要: 为了提升电机的通风冷却性能、降低其运行温升,以一台400 kW中型高压电机为例,采用轴径向混合通风结构,通过磁-流-固耦合模拟研究整体电机稳态条件下温升影响规律,提出温升均匀性系数对两种通风结构的冷却效果进行量化评价。研究结果表明:相对于轴向通风结构,混合通风结构温升分布更加均匀,在电机内层和外层绕组温升均匀性系数分别提高了85.78%和6.23%;进一步探讨了径向风道高度及数量对电机温升的影响,径向风道高度为6 mm、径向风道数量为13个时冷却效果最好。
  • 图  1  样机物理模型

    图  2  气隙剖面图

    图  3  网格划分

    图  4  电机整体温度分布

    图  5  定子铁芯温度分布

    图  6  定子绕组温度分布

    图  7  定子绕组沿轴向温升分布

    图  8  混合通风结构电机物理模型

    图  9  径向风道内流速分布

    图  10  混合通风结构电机整体温度分布

    图  11  混合通风结构定子铁芯温度分布

    图  12  混合通风结构定子绕组温度分布

    图  13  混合通风结构定子绕组沿轴向温升分布

    图  14  径向风道高度对电机各部件温升影响

    图  15  径向风道数量对电机各部件温升影响

    图  16  径向风道高度及数量对电机各部件温升影响

    表  1  电机基本参数

    参数 数值
    功率/kW 400
    转速/(r·min-1) 991
    定子内外径/mm 450/740
    转子内外径/mm 230/446.8
    气隙长度/mm 1.6
    铁芯长度/mm 790
    下载: 导出CSV

    表  2  网格无关性验证

    网格数量/×104 265 320 367 412
    绕组温升/K 76.9 76.0 75.3 74.9
    下载: 导出CSV

    表  3  两种结构温升分布均匀性系数

    均匀性系数η 轴向通风结构 轴径向混合通风结构 提高幅度
    内层绕组 8.51 1.21 85.78%
    外层绕组 5.62 5.27 6.23%
    下载: 导出CSV

    表  4  不同径向风道高度电机各部件损耗

    损耗/W 径向风道高度/mm
    6 8 10
    绕组铜耗 4 302.37 4 393.82 4 507.90
    定子铁耗 4 550.23 4 705.15 4 864.55
    转子铜耗 3 427.27 3 441.90 3 448.46
    杂散损耗 5 080.00 5 080.00 5 080.00
    下载: 导出CSV

    表  5  不同径向风道数电机各部件损耗

    损耗/W 径向风道数量/个
    12 13 14
    绕组铜耗 4 291.74 4 302.37 4 324.04
    定子铁耗 4 515.94 4 550.23 4 583.92
    转子铜耗 3 429.59 3 427.27 3 436.07
    杂散损耗 5 080.00 5 080.00 5 080.00
    下载: 导出CSV
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  • 收稿日期:  2021-04-22
  • 刊出日期:  2023-01-25

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