ANSYS在磁力驱动器设计中的应用

简要介绍了ANSYS有限元分析软件,并利用ANSYS软件对一个8极同轴圆筒式磁力驱动器进行了磁场分析和最大转矩计算。     

压缩型弹性联轴器压装性能的有限元分析

以压缩型弹性联轴器为研究对象,使用ANSYS有限元分析软件建立了弹性联轴器压装模拟模型,橡胶材料采用Mooney-Rivlin超弹模型,使用橡胶单轴压缩试验拟合得到了橡胶材料Rivlin参数,通过摩擦试验测试了不同压装条件下的摩擦系数,分析了压装过程弹性联轴器最大接触应力和平均压缩应力的影响因素。结果表明,法兰内衬孔倒角和摩擦系数对压装最大接触应力均有影响;使用有限元计算的弹性联轴器工作扭矩与实测值比较吻合,并确定了法兰内衬孔直径与弹性联轴器平均压缩应力的关系。     

一种预防隔离套破损导致介质泄漏的磁力联轴器

针对隔离套破损后磁力联轴输送的介质将发生泄漏的问题,设计了一种新型磁力联轴器。这种磁力联轴器隔离套采用双层隔套结构,当一个隔套出现破损时,报警系统会自动报警,使隔离套在完全失效之前就能得到维修或更换。     

磁力泵的结构特点及使用与维修

CQ型磁力驱动泵,简称磁力泵,是一种通过磁力传动器(磁力联轴器)来实现无接触力矩传递从而以静密封取代动密封,使泵达到完全无泄漏的离心泵。     

水泥厂实用机修技术(十九)

7.5 联轴器的安装调整 在机器的传动系统中,常用联轴器联接同一轴线上的两轴,使其一同旋转并传递转矩,有时也用它来作为安全装置。采用联轴器的轴联接,只有在机器停止运转时才能经拆卸使两轴脱开。联轴器广泛用于各类机器中。在水泥厂,锤式破碎机、球磨     

开关磁阻电机的三维有限元分析及性能研究

磁场计算和调速控制是开关磁阻电机的研究热点,本文采用三维有限元分析法对开关磁阻电机的电磁场进行研究。在三维分析中,考虑了端部效应对电机电磁场分布的影响。采用整体建模的方法,并在施加载荷时引入跑道线圈这一概念。结果表明:三维有限元分析能更好地反映电机实际的磁场分布,得出电机静态曲线,为电机的控制研究奠定了基础。将有限元分析所得磁化曲线及电感、转矩数据用于改进的开关磁阻电机调速系统的模型中,来验证电机的动静态性能。     

单表法找正化工机器联轴器

联轴器是在化工机器中主要是连接主动机(电机和汽轮机)及从化工机器(压缩机和泵等)的重要连接部件,具有传递运动和转矩的基本功能。结合电机驱动压缩机联轴器找正的过程,介绍用单表法找正化工机器联轴器的方法。     

水泥磨传动轴联轴器的改造

1 存在的问题 冀东水泥吉林公司Ф4 m×13.5 m中心传动水泥磨机出口卸料接管与主减速机之间采用鼓形齿联轴器-传动空心轴-鼓形齿联轴器连接方式传递转矩动力,设备运转过程中,主减速机输出轴法兰与鼓形齿联轴器间的连接螺栓经常断裂.     

太仓市磁力驱动泵有限公司开发成功一种高稳定性磁力离心泵

<正>太仓市磁力驱动泵有限公司宣布,一种高稳定性磁力离心泵已经开发成功,目前正在申请专利中。磁力离心泵是将永磁联轴器的工作原理用于离心泵的高科技产品,设计合理,工艺先进,具有全密封,无泄漏,耐腐蚀等特点。磁力离心泵可广泛用于化工、制酸、制碱、冶炼、稀土、农药、染料、医药、造纸、电镀、酸洗、无线电、化成箔、石油、食品、电影照相洗印、科研机构、国防工业     

磁力驱动技术在风电水冷系统三通阀上的应用

简要介绍了磁力驱动器工作原理和分体式磁力驱动器,设计出一种用于风电水冷系统三通阀的一体式磁力驱动器,并对磁路、隔离套等进行了分析,最后对磁力驱动三通阀进行了参数计算。所设计的磁力驱动器在风电水冷系统应用中运行良好,表明磁力驱动技术在风电水冷系统三通阀上的应用实际可行。     

圆筒式磁力传动器磁扭矩计算的一种新方法

在等效磁荷理论的基础上,运用磁荷积分法对圆筒式磁力传动器的磁扭矩进行数学建模推导得到一种新的磁扭矩计算公式,通过试验验证了该磁扭矩计算公式的正确性。通过与其他常用磁扭矩计算方法的比较,该算法平均相对误差较高斯定理求解法和经验公式求解法的小,且不需用试验确定经验系数。     

Soft magnetic geopolymer in airport pavement induction heating: Effect of Fe powder distribution on the electromagnetic loss

During the induction heating of airport pavement to melt snow and ice, soft magnetic geopolymer can shape magnetic field distribution and enhance energy utilization efficiency by reducing potential electromagnetic loss. The goal of this study is to investigate the effect of Fe powder distribution on the electromagnetic loss of soft magnetic geopolymer during airport pavement induction heating. The findings can provide theoretical guidance for the design of soft magnetic geopolymer layer used in airport pavement induction heating. The following are the key findings from this study: (1) A force model suitable for studying the flow of iron powder in fresh geopolymer paste was proposed, which can be used to predict and control the movement and distribution of iron powder within the geopolymer paste during the curing process; (2) The low static yield stress of fresh geopolymer paste can result in a non-zero resultant force acting on the iron powder inside the soft magnetic geopolymer, causing the iron powder to move downward and deposit; (3) Iron powder sedimentation should be avoided because it can intensify magnetic and electrical coupling between particles, resulting in significant polarization loss and eddy current loss inside the soft magnetic geopolymer, and lowering induction heating efficiency.     

Enhancing liquid micromixing using low‐frequency rotating nanoparticles

Magnetic nanofluid actuation by rotating magnetic fields was proposed as a high‐performance tool for liquid mixing with enhanced micromixing features. A comparative study was conducted to evaluate the mixing index in T‐type mixers of magnetic and nonmagnetic fluids subject to static (SMF), oscillating (OMF), and rotating (RMF) magnetic fields. RMF excitation unveiled superior mixing indices with strong dependences to magnetic field frequency and content of magnetic nanoparticles. The impact of magnetic field types on micromixing was further examined at low and moderate Re numbers using the Villermaux–Dushman reaction and IEM micromixing model. The IEM‐inferred micromixing times were remarkably shorter by nearly four orders of magnitude in comparison with OMF and SMF excitations, and without magnetic field. The proposed mixing strategy is foreseen to complement innovative microfluidic devices with valuable mixing tools and methods for the diagnosis of the coupling between transport and intrinsic kinetics. © 2016 American Institute of Chemical Engineers AIChE J, 63: 337–346, 2017     

静磁场对黑胡椒提取物抗氧化活性的影响

将不同强度的静磁场分别作用于浸提、黑胡椒提取物预处理及抗氧化活性测定过程,研究磁场作用于不同过程对黑胡椒提取物抗氧化活性的影响.通过测定黑胡椒提取物体外条件下对1,1-二苯基-2-三硝基苯肼(DPPH)自由基的清除能力和对铁氰化钾的还原能力来评价黑胡椒提取物的抗氧化活性.结果表明,静磁场能够改变黑胡椒提取物清除DPPH自由基的能力和还原能力,但磁场作用于不同过程,其影响结果不同.静磁场作用于浸提和预处理过程时,黑胡椒提取物的抗氧化活性会受到抑制;静磁场作用于抗氧化活性测定过程时,黑胡椒提取物清除DPPH自由基的能力受到抑制,但其还原能力明显增强.     

圆柱形橡胶试样硫化过程的有限元分析与实验研究

利用低场核磁交联密度测定仪分析不同硫化时间下橡胶材料的交联密度，并与相同时刻下盘式硫化仪测得的扭矩对比，定量地发现扭矩与交联密度近似成线性关系。通过有限元传热分析和硫化程度场分布的二次算法开发，圆柱形橡胶试样表面和芯部的温升历程和硫化程度的仿真结果与实验数据高度吻合。该研究对于橡胶制品的硫化工艺设计提供参考。     

Development of a Fatigue Failure Model for the Adhesively Bonded Tubular Single Lap Joint under Dynamic Torsional Loading

The adhesively bonded tubular single lap joint shows nonlinear torque transmission capability and deformation characteristics under static torsional loading because of nonlinear properties of the adhesive. However, the dynamic or fatigue torque transmission capability can be calculated with linear, analysis because the stress-strain relation under torsional fatigue loading is linear, due to the small dynamic transmission capability compared with the static torque transmission capability.

In this paper, a failure model for the adhesively bonded tubular single lap joint under torsional fatigue loading was developed with respect to the adhesive thickness, which is the critical factor for the static torque transmission capability. Also, a design method for the adhesively bonded tubular single lap joint under torsional fatigue loading was proposed.     

Development of a Fatigue Failure Model for the Adhesively Bonded Tubular Single Lap Joint under Dynamic Torsional Loading

The adhesively bonded tubular single lap joint shows nonlinear torque transmission capability and deformation characteristics under static torsional loading because of nonlinear properties of the adhesive. However, the dynamic or fatigue torque transmission capability can be calculated with linear, analysis because the stress-strain relation under torsional fatigue loading is linear, due to the small dynamic transmission capability compared with the static torque transmission capability.

In this paper, a failure model for the adhesively bonded tubular single lap joint under torsional fatigue loading was developed with respect to the adhesive thickness, which is the critical factor for the static torque transmission capability. Also, a design method for the adhesively bonded tubular single lap joint under torsional fatigue loading was proposed.     

磁性催化剂反应器耦合磁分离装置

反应磁分离耦合装置兼具化学反应和流固相分离的功能,有助于提高反应效率、降低分离能耗、缩短工艺流程和避免催化剂磨损流失。综述近年来反应磁分离耦合装置的研究进展,流化态耦合磁分离装置包括磁稳流化床反应器和流化床耦合旋流磁分离装置,悬浮态耦合磁分离装置包括磁分离耦合悬浮态光催化反应器和釜式反应器耦合磁分离装置。指出磁性催化剂反应器和磁分离耦合装置应用中需要解决的关键问题是:规范生产适用于磁性催化剂反应器耦合磁分离装置的磁性催化剂以及构建磁性催化剂反应器耦合磁分离装置过程中必须引入磁场发生器。     

磁场对电解法处理垃圾渗滤液的影响

以经过混凝处理后的新鲜垃圾渗滤液为研究对象,试验研究了恒定磁场和交变磁场对电解法处理垃圾渗滤液的影响.结果表明,恒定磁场与交变磁场都能使垃圾渗滤液COD降低;使用恒定磁场和交变磁场处理垃圾渗滤液30min后再进行电解处理,相比单独用电解处理,COD去除率分别提高了约17%和12%,恒定磁场的效果优于交变磁场;在电解的同时施加0.2970T的恒定磁场和交变磁场,相比单独使用电解处理,COD去除率分别提高了约20%和25%,交变磁场的效果优于恒定磁场.     

Magnetically induced agitation in liquid‐liquid‐magnetic nanoparticle emulsions: Potential for process intensification

Microscopic mixing using magnetic nanoparticles (MNP) unveils exciting ramifications for process intensification in chemical engineering. This study explores the use of oil‐in‐water MNP emulsions to achieve mixing in a nonmagnetic continuous phase tantamount to that occurring in equivalent dilute ferrofluid suspensions. To assess the technique, measurements of the torque exerted by ferrofluid emulsions and suspensions of equal magnetic content were performed in rotating, oscillating, and static magnetic fields. Results show that momentum transfer is fairly alike in amplitude and proportionality for the two types of systems of equal magnetic content under the three types of magnetic fields. This implies that momentum of spinning nanoparticles in the emulsions is transferable to the oil droplets containing them which, in return is then transferred to surrounding nonmagnetic liquid. The magnitude of the resulting mixing allows for the foresight of a versatile MNP mixing technology completely separated from the target phase being mixed. © 2013 American Institute of Chemical Engineers AIChE J, 60: 1176–1181, 2014