在线自动平衡装置中永磁自锁力的影响因素研究  

Factors influencing the self-locking force of an on-line automatic balancing device

作　　者：刘福国[1] 陈立芳[1] 王维民[1] 张宸菥 

机构地区：[1]北京化工大学机电工程学院高端机械装备健康监控与自愈化北京市重点实验室,北京100029

出　　处：《北京化工大学学报（自然科学版）》2016年第2期114-121,共8页Journal of Beijing University of Chemical Technology(Natural Science Edition)

基　　金：国家自然科学基金(51135001);国家重点基础研究发展计划(2012CB026000)

摘　　要：研究了电磁式自动平衡装置中自锁力的影响因素及优化方法。首先详细介绍了自动平衡头的永磁自锁结构和磁性材料性能,并通过电磁平衡头的永磁自锁磁路分析得到了影响自锁力的主要结构参数;在此基础上建立了自动平衡头的三维简化模型,基于有限元法研究了不同结构参数下配重盘在"步进"过程中的自锁力,总结了"步进"过程中自锁力的变化规律,为驱动电流设计提供了理论依据,并提出了提高自锁力的方法;在满足自锁功能的前提下,研究了自锁力对最大角加速度、配重块质量的影响,得到了三者之间的量化关系,并核算了某一配重块质量的平衡头在不同自锁力下所能承受的最大角加速度。根据仿真结果,设计了自动平衡实验装置,进行了实验验证,研究结果表明自锁力分析结果准确可靠。The factors influencing the self-locking force in an electromagnetic automatic balance device and methods of optimization of the device have been studied. The permanent magnetic self-locking structure and the performance of the magnetic materials in the automatic balancer are first introduced in detail. By means of analyzing the permanent magnetic self-locking magnetic path of the electromagnetic balancer, the structural parameters which influence the self-locking force were identified. Based on earlier work, a three-dimensional simplified model of the balancer was constructed. Using FEM, a study of the self-locking force of the counterweight disk at 10 points during one ＂step＂ with different structural parameters was carried out. A summary of the regular changes in the self-locking force during one ＂step forward＂ provides a theoretical foundation for driven-current design. Meanwhile, a method has been proposed to enhance the self-locking force. Under the premise of satisfying the self-locking function, in order to quantify the correlation between the counterweight mass and the maximum angular acceleration with a self- locking force, further studies were carried out. The maximum angular acceleration of a certain counterweight mass weight under different self-locking forces was calculated. Based on the results of the simulations, an automatic balance experiment device has been designed and tested experimentally. The results show that the analysis results are accurate and reliable.

关 键 词：电磁平衡头 静态磁场分析 自锁力 结构参数 最大角加速度 

分 类 号：TH113[机械工程—机械设计及理论]