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

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

1.
湘潭大学机械工程学院, 湖南湘潭 411105
2.
中车株洲电机有限公司, 湖南株洲 412000

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
计量
- 文章访问数: 75
- HTML全文浏览量: 37
- PDF下载量: 19
- 被引次数: 0
出版历程
- 收稿日期: 2021-04-22
- 刊出日期: 2023-01-25

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

1.
School of Mechanical Engineering, Xiangtan University, Xiang′tan 411105, Hu′nan, China
2.
CRRC Zhuzhou Electric Co., Ltd., Zhuzhou 412000, Hu′nan, China

摘要

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。
- 中型高压电机 /
- 磁-流-固耦合 /
- 混合通风结构 /
- 径向风道 /
- 强化散热
Abstract: The axial and radial mixed ventilation structure is adopted in order to improve the ventilation and cooling performance and reduce the operating temperature rise of the motor. Taking a 400 kW medium-sized high voltage motor as an research object, the influence law of temperature rise of the integral motor under steady state condition is studied through magnetic-fluid-solid coupling simulation. The cooling effect of the ventilation structure is quantitatively evaluated by proposing temperature rise uniformity coefficient. The results show that the temperature rise distribution of mixed ventilation structure is more uniform, and the uniformity coefficient of temperature rise is 85.78% and 6.23% higher than that of axial ventilation structure in the inner and outer winding of motor, respectively. The influence of the height and number of radial air ducts on motor temperature rise is further studied. Cooling effect is the best when the height is 6 mm and the number of radial duct is 13.
- medium-sized high voltage motor /
- magnetic-fluid-solid coupling /
- mixed ventilation structure /
- radial air duct /
- heat dissipation enhancement

HTML全文

图 1 样机物理模型

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图 2 气隙剖面图

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图 3 网格划分

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图 4 电机整体温度分布

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图 5 定子铁芯温度分布

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图 6 定子绕组温度分布

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图 7 定子绕组沿轴向温升分布

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图 8 混合通风结构电机物理模型

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图 9 径向风道内流速分布

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图 10 混合通风结构电机整体温度分布

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图 11 混合通风结构定子铁芯温度分布

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图 12 混合通风结构定子绕组温度分布

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图 13 混合通风结构定子绕组沿轴向温升分布

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图 14 径向风道高度对电机各部件温升影响

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图 15 径向风道数量对电机各部件温升影响

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图 16 径向风道高度及数量对电机各部件温升影响

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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

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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

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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%

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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
损耗/W	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

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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
损耗/W	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

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