两级径向流磁流变阀结构设计与性能研究

发布时间：2018-05-06 23:18

本文选题：磁流变阀 + 两级径向流　；参考：《华东交通大学》2016年硕士论文

【摘要】：传统液压阀结构要实现液压系统中压力及流量的有效控制,一般是基于阀芯与阀体机械部件的相对运动。这种工作方式及特点使液压阀原理构造复杂,零部件加工及装配精度要求高,响应速度慢,以及可靠性低、不易控制。而以智能材料磁流变液为传动介质的磁流变阀的出现则有效改善了上述不足。但是,目前磁流变阀结构设计多为轴向圆环式且压差可调范围不宽,基于此,本文提出并设计了一种两级径向流磁流变阀。该磁流变阀磁场作用下的液流通道为四段径向阻尼通道,相比于单级径向流结构,从原理上有效增加了一倍长度的阻尼通道。另外,相比于轴向圆环式结构,能有效提高磁场利用率,增加系统压降。本文主要完成研究内容包括:1、提出并设计了一种两级径向流磁流变阀,该磁流变阀液流通道主要由3段小孔流,2段圆环流和4段径向流组成。提出了基本的结构原理,给出了初步结构参数定义值,并进行了初步磁路计算与验证。对两级径向流磁流变阀阻尼间隙通道进行了分类,然后具体划分出产生黏致压降和磁致压降的通道,分别推导出对应区域类型的压降计算公式,并得出了总压降计算公式。2、利用ANSYS有限元仿真分析软件EMAG模块对该两级径向流动磁流变阀进行了建模仿真分析。建立了相应的定义路径并观察了其中磁感应强度大小及整个模型磁力线走向分布情况;同时对初始结构进行了优化设计,并确定最终结构尺寸,最后进行了对比分析。3、采用Gambit软件生成了相应分析文件。然后采用Fluent软件建立流场域设置和求解计算。对该两级径向流磁流变阀的流动路径中速度、流动状态及压降作出了一定分析验证。4、利用LabVIEW程序设计软件编程实现了数据采集要求,搭建了磁流变阀的性能测试实验平台。对该两级径向流磁流变阀的压降特性及压差响应特性进行了测试分析,根据实验结果对其合理性、准确性以及与理论设计分析计算结果进行了对比分析与验证。
[Abstract]:The traditional hydraulic valve structure to realize the effective control of pressure and flow in hydraulic system is generally based on the relative movement of valve core and valve body mechanical parts. This kind of working mode and characteristic makes the principle of hydraulic valve complex, the precision of machining and assembly of parts is high, the response speed is slow, the reliability is low, and it is difficult to control. The magnetorheological valve with intelligent material magnetorheological fluid as transmission medium can effectively improve the above deficiencies. However, at present, the structure of MRV is mostly axial annular and the pressure difference is not wide. Based on this, a two-stage radial flow MRF valve is proposed and designed in this paper. The liquid flow channel under the magnetic field of the magnetorheological valve is a four-stage radial damping channel. Compared with the single-stage radial flow structure, the damping channel with double length is effectively increased in principle. In addition, compared with the axial ring structure, the magnetic field utilization rate can be improved effectively and the pressure drop of the system can be increased. In this paper, a two-stage radial flow magnetorheological valve is proposed and designed. The liquid flow channel of the MRV consists of three small orifice flow, two annular flow and four radial flow. The basic structure principle is put forward, the definition value of the initial structure parameters is given, and the calculation and verification of the primary magnetic circuit are carried out. In this paper, the damping gap channels of two stage radial MRF valves are classified, and then the channels that produce visco-induced pressure drop and magnetic-induced pressure drop are divided, and the corresponding regional pressure drop formulas are derived respectively. The formula of total pressure drop is obtained. The model of the two-stage radial magnetorheological valve is modeled and analyzed by using ANSYS finite element simulation software EMAG module. The corresponding defining path is established and the magnetic induction intensity and the distribution of the magnetic force line of the whole model are observed, and the initial structure is optimized and the final structure size is determined. Finally, a comparative analysis. 3, using Gambit software to generate the corresponding analysis file. Then the Fluent software is used to set up the flow field and to solve the problem. The velocity, flow state and pressure drop in the flow path of the two-stage radial flow magnetorheological valve are analyzed and verified. Finally, the data acquisition requirements are realized by using LabVIEW programming software, and the test platform for the performance of the MRF valve is set up. The pressure drop characteristics and pressure differential response characteristics of the two-stage radial magnetorheological valve are tested and analyzed. The rationality, accuracy and calculation results of the two stage radial flow magnetorheological valve are compared and verified by the experimental results.
【学位授予单位】：华东交通大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH137.52

【相似文献】