纺织学报 ›› 2020, Vol. 41 ›› Issue (09): 136-142.doi: 10.13475/j.fzxb.20191201607

• 机械与器材 • 上一篇    下一篇

混合磁悬浮织针驱动的永磁织针磁场分布规律

李冬冬1, 张成俊1,2(), 左小艳1,2, 张弛1,2, 李红军1, 周向阳1   

  1. 1.武汉纺织大学 机械工程与自动化学院, 湖北 武汉 430073
    2.武汉纺织大学 湖北省数字化纺织装备重点实验室, 湖北 武汉 430073
  • 收稿日期:2019-12-05 修回日期:2020-03-01 出版日期:2020-09-15 发布日期:2020-09-25
  • 通讯作者: 张成俊
  • 作者简介:李冬冬(1995—),男,硕士生。主要研究方向为针织装备设计。
  • 基金资助:
    国家自然科学基金资助项目(51875414);湖北省自然科学基金资助项目(2019CFB610);湖北省教育厅科学技术研究项目(D20181704);湖北省教育厅科学技术研究项目(D20191701);湖北省数字化纺织装备重点实验室开放课题资助项目(DTL2019009)

Study on magnetic field distribution in permanent magnetic needle drive using hybrid magnetic suspension needle

LI Dongdong1, ZHANG Chengjun1,2(), ZUO Xiaoyan1,2, ZHANG Chi1,2, LI Hongjun1, ZHOU Xiangyang1   

  1. 1. School of Mechanical Engineering & Automation, Wuhan Textile University, Wuhan, Hubei 430073, China
    2. Hubei Digital Textile Equipment Key Laboratory, Wuhan Textile University, Wuhan, Hubei 430073, China
  • Received:2019-12-05 Revised:2020-03-01 Online:2020-09-15 Published:2020-09-25
  • Contact: ZHANG Chengjun

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摘要：

为研究横机织针混合磁悬浮驱动的空间磁场分布规律,通过构建圆柱形和长方体形2种永磁织针结构,根据安培环路定理,将永磁体等效为纵向的多圈电流环结构,并据此推导出织针垂直向上运动至空间任意位置的磁感应强度。在此基础上利用有限元电磁仿真软件对永磁织针模型进行仿真,同时搭建织针空间磁场强度实验测量平台进行数值测量。通过对比计算、仿真和实验测量发现:在圆柱型永磁织针中,厚径比越大,磁感应强度越大;在长方形永磁织针中,厚度不变磁感应强度随着长宽比增大而减小。

关键词: 悬浮织针, 叠加磁场, 永磁织针, 织针等效模型, 针织横机

Abstract:

In order to study the spatial magnetic field distribution with mixed magnetic suspension for driving flat-bed knitting needles, two permanent magnet needles in cylindrical and rectangular shapes were constructed. According to the ampere loop theorem that permanent magnets are equivalent to vertical coil current loop structure, knitting needle was deduced based on the vertical movement to the space location of the magnetic induction intensity. On the basis of the above, finite element electromagnetic simulation was carried out to simulate the model of permanent magnet knitting needles, and an experimental measuring platform for the spatial magnetic field strength of knitting needles was built for numerical measurement. Through the comparison of model, simulation and experimental measurement results, it is shown that in cylindrical permanent magnetic knitting needles, the larger the thickness-diameter ratio is, the greater the magnetic induction intensity becomes. In rectangular permanent magnetic knitting needles, the magnetic induction intensity with constant thickness decreases as the aspect ratio increases.

Key words: suspension needle, superimposed magnetic field, permanent magnetic needle, knitting equivalent model, flat-bed knitting machine

中图分类号: 

  • TP311

图1

织针磁驱动结构示意图"

图2

圆柱形永磁织针几何和等效环流模型"

图3

空间中一点的磁感应强度等效模型 注:a表示P在XY平面的投影点。"

图4

铷磁体的退磁曲线"

图5

长方体永磁等效模型"

表1

2种永磁体的结构参数"

形状 材料 直径/mm 长度/mm 宽度/mm 高度/mm
圆柱体 铷铁硼
(Nd35)		 [4,6,8,10] — — [2,3,4,5]
长方体 铷铁硼(Nd35) — [10,20,30,40] 10 [2,3,4,5]

图6

磁感应强度仿真结果"

图7

磁感应强度变化三维云图"

图8

磁感应强度数值结果"

图9

磁感应强度实验结果"

图10

误差值分布"

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