聚磁式永磁涡流耦合器的性能分析和测试

发布时间：2018-10-18 17:52

【摘要】：永磁涡流耦合器作为一种工业传动装置,因其具有独特的传动原理,被广泛应用在石化、制药、冶金等行业中。本文研究的是盘式永磁涡流耦合器,它不仅具有空载启动、运行平稳、对中精度要求较低等优势,更重要的是可以通过装置上铜盘和永磁体盘的相对运动产生磁耦合力来实现无接触传动,并在改变气隙间距下可以实现对输出扭矩的调节,达到节约能源、绿色环保的目的。由于国家和政府对能源利用率十分重视,因此,对永磁涡流耦合器的性能进行分析就显得尤为重要。本文则介绍以下几个方面:首先,本文是对聚磁式永磁涡流耦合器进行的研究,聚磁式的磁路结构是普通磁路结构的改进和增强。在充分了解聚磁式永磁涡流耦合器的结构和工作原理的基础上,利用Ansoft有限元软件进行实体建模,并通过软件对传动装置的材料和边界条件等进行设置。其次,本文在利用有限元软件建模的基础上,分析了聚磁式永磁涡流耦合器在不同转速差和结构参数下对传动的扭矩、磁感应强度和涡流损耗的影响。从分析中可得出,不同的转速差和结构参数对传动扭矩和磁感应强度的影响几乎是相同的,在气隙和结构相同时,转速差在500-700r/min时,扭矩有最大值;在结构和转速差相同时,气隙越小则传递的扭矩越大;还可以看出,涡流损耗主要与转速差和传递扭矩的大小有关,在相同结构和气隙下,转速差越大,则涡流损耗越大;但在转速差恒定时,则传递的扭矩越大时,涡流损耗越大。再次,通过分析在相同气隙不同转速差下聚磁式磁力耦合器的不同结构对传递扭矩的影响得出,在该聚磁式磁力耦合器最佳磁极数为10极,铜盘厚度为3mm,永磁体厚度为10mm,小磁角的充磁角度和气隙则是越小越好;利用上面分析出的结构参数的最佳值进行建模,并通过有限元分析不同转速差和气隙下最佳结构传递的扭矩值。最后,搭建试验平台并对这个平台的检测系统工作原理进行介绍。在更好的了解试验平台的基础上对最佳结构下的聚磁式永磁涡流耦合器的传动扭矩进行测量,分析其值与有限元分析计算的值的关系。
[Abstract]:As a kind of industrial transmission device, permanent magnet eddy current coupler is widely used in petrochemical, pharmaceutical, metallurgical and other industries because of its unique transmission principle. In this paper, the disk permanent magnet eddy current coupler is studied. It not only has the advantages of no load start, smooth operation, but also low requirement of middle precision, etc. What is more important is that the magnetic coupling force can be produced by the relative motion of the copper disk and the permanent magnet disk on the device, and the output torque can be adjusted by changing the air gap spacing, which can save energy and protect the environment. Because the state and government attach great importance to energy efficiency, it is very important to analyze the performance of permanent magnet eddy current coupler. In this paper, the following aspects are introduced: firstly, this paper studies the magnetic current coupler, the magnetic circuit structure of which is the improvement and enhancement of the common magnetic circuit structure. On the basis of fully understanding the structure and working principle of the poly-magnetic permanent magnet eddy current coupler, the solid modeling is carried out by using Ansoft finite element software, and the material and boundary conditions of the transmission device are set up by the software. Secondly, on the basis of finite element software modeling, the influence of magnetic flux permanent magnet eddy current coupler on torque, magnetic induction intensity and eddy current loss under different rotational speed difference and structure parameters is analyzed. From the analysis, it can be concluded that the effect of different rotational speed difference and structure parameters on the torque and magnetic induction intensity is almost the same. When the air gap and structure are the same, the torque has the maximum value when the speed difference is 500-700r/min, and when the structure and speed difference are the same, The smaller the air gap, the greater the torque, and it can be seen that the eddy current loss is mainly related to the speed difference and the transmission torque. Under the same structure and air gap, the larger the speed difference, the greater the eddy current loss, but when the rotational speed difference is constant, the eddy current loss is larger. The greater the torque, the greater the eddy current loss. Thirdly, by analyzing the effect of different structures of magnetic coupler on transmission torque under the same air gap and different rotational speed difference, it is concluded that the optimum magnetic pole number of the magnetic coupler is 10 poles. The thickness of copper disk is 3 mm, the thickness of permanent magnet is 10 mm, and the magnetization angle and air gap of small magnetic angle are as small as possible. The torque value of the optimal structure under different rotational speed difference and air gap is analyzed by finite element method. Finally, the test platform is built and the working principle of the test system is introduced. On the basis of a better understanding of the test platform, the transmission torque of the poly-magnetic permanent magnet eddy current coupler is measured under the optimum structure, and the relationship between its value and the value calculated by finite element analysis is analyzed.
【学位授予单位】：沈阳工业大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH132

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