基于磁流变原理的旋转件加载装置研究

发布时间：2018-03-13 06:46

本文选题：磁流变液　切入点：加载装置设计　出处：《上海工程技术大学》2015年硕士论文　论文类型：学位论文

【摘要】：磁流变液(Magnetorheological Fluids,简称MRF)是一种智能材料,其流变特性可以在外加磁场作用下发生巨大变化,且这种变化连续、可逆、可控。在无外加磁场作用时,其表现出流动性好、粘度低的牛顿流体特性;当有外加磁场作用时,其表观粘度在毫秒级时间内变化出流动性低、粘度高的Bingham流体特性。基于这一特性开发的磁流变液加载装置结构简单、加载平稳、体积小、能耗低、响应快,在工程应用领域具有广泛的前景。本文设计的磁流变液加载装置是通过改变磁流变液的剪切屈服强度实现加载力矩的改变,剪切屈服强度的大小可由外加磁场的变化来控制。本文在分析了国内外对磁流变液材料及其应用研究现状的基础上,结合机械设计方法对圆盘剪切式磁流变液加载装置进行了分析,建立了盘式加载装置的加载力矩方程,阐述了盘式加载装置的设计过程和实验方法,对磁流变效应的可逆性进行了验证,为扩展磁流变材料工程应用领域提供了依据。本文的主要研究工作如下:1)回顾了磁流变液在工程领域中的应用,对磁流变液技术目前存在的一些问题进行简单阐述,介绍磁流变液的组成成分及各成分的作用,研究磁流变液的分类、磁流变效应、流变特征、流变机理,分析磁流变效应的影响因素。2)对磁流变液加载装置进行理论分析,研究磁流变液加载装置的特点及工作模式并对每一工作模式进行详细介绍,研究磁流变液加载装置的工作形式并对每一工作形式进行介绍,对加载执行机构的磁路进行设计,对圆盘剪切式磁流变液加载装置进行分析,基于Bingham模型研究圆盘式加载装置的工作原理、建立圆盘式加载装置加载力矩的计算公式,分析加载力矩的影响因素以及与各影响因素之间的关系,为加载装置的设计提供理论依据。3)对磁流变液加载执行机构进行结构设计,介绍磁流变液加载装置的设计准则,对加载执行机构的密封装置、轴承、键、螺栓以及转轴等主要装置或部件进行设计和计算。4)对磁流变液加载系统实验台架的搭建进行介绍,介绍加载系统中冷却系统、电力控制系统的设计和作用,对磁流变液加载装置执行系统进行详细介绍,包括加载装置执行机构主要部件的材料、形状和三维图等。5)为验证磁流变液加载装置的可逆性设计实验方案、实验布置,分别介绍每一实验工况的实验内容以及实验目的,对磁流变液加载装置进行现场实验,对照实验目的对实验数据进行整理分析,得出加载装置可逆的实验结论。6)对本文的工作进行总结。
[Abstract]:Magnetorheological fluid (MRF) is a kind of intelligent material, its rheological properties can change greatly under the action of external magnetic field, and the change is continuous, reversible and controllable. The properties of Newtonian fluid with low viscosity and low fluidity and high viscosity can be obtained by changing the apparent viscosity of Newtonian fluid in millisecond when the magnetic field is applied. The structure of the Magnetorheological fluid loading device based on this characteristic is simple. Because of its stable loading, small volume, low energy consumption and fast response, the MRF loading device designed in this paper can change the loading torque by changing the shear yield strength of MRF. The shear yield strength can be controlled by the change of magnetic field. Combined with the mechanical design method, the disk shear magneto-rheological fluid loading device is analyzed, the loading moment equation of the disc loading device is established, and the design process and experimental method of the disc loading device are described. The reversibility of magnetorheological effect is verified, which provides a basis for expanding the engineering application of MRF. The main research work in this paper is as follows: 1) the application of MRF in engineering field is reviewed. Some problems existing in magnetorheological fluid technology are briefly described. The composition of MRF and its function are introduced. The classification of MRF, the effect of MRF, rheological characteristics and rheological mechanism are studied. Analyzing the influencing factors of magnetorheological effect. (2) analyzing the theory of magneto-rheological fluid loading device, studying the characteristics and working mode of magnetorheological fluid loading device, and introducing each working mode in detail. This paper studies the working form of the magnetorheological fluid loading device and introduces each working form, designs the magnetic circuit of the loading actuator, and analyzes the disk shear magnetorheological fluid loading device. Based on the Bingham model, the working principle of the disk loading device is studied, and the calculation formula of the loading moment of the disc loading device is established, and the influence factors of the loading moment and the relationship between the loading moment and the influencing factors are analyzed. To provide a theoretical basis for the design of the loading device. 3) to design the structure of the MRF loading actuator, introduce the design criteria of the MRF loading device, the sealing device, the bearing, the key of the loading actuator, The design and calculation of the main devices or components such as bolts and rotating shafts are introduced in this paper. The design and function of the cooling system and the electric control system in the loading system are introduced, and the construction of the experimental bench for the magnetorheological fluid loading system is introduced. The execution system of the MRF loading device is introduced in detail, including the material, shape and 3D figure of the main parts of the actuator, etc., in order to verify the reversible design scheme and experimental arrangement of the MRF loading device, This paper introduces the experimental contents and purposes of each experiment condition, carries on the field experiment to the magnetorheological fluid loading device, and collates and analyzes the experimental data in comparison with the experimental purpose. The reversible experimental conclusion of loading device. 6) summarize the work of this paper.
【学位授予单位】：上海工程技术大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TB381

【参考文献】