Research On The Layered Magnetorheological Torque Transmission

Magneto-rheological Fluid is a new smart material which can changing itsfeature from liquid state to solid state, and it’s a reversible and controlled process. In aview of the excellent feature, Magneto-rheological Fluid has become a an importantbranch and the core of the research of smart materials. It has the biggest developmentpotential among the fluid materials. Because of the feature of the Magneto-rheologicalFluid, in the applied magnetic field, the MTSD would changes its apparent viscosityand force itself to change from fluid state to solid state instantly. It often manifest anBingham-body. This process would generate shear yield stress to output and deliverchangeable torque. In this paper, the traditional MRF transmission is compared withthe layered pattern, and the transmission theories are researched systematically, andalso the magnetic circuit structure of the layered pattern is analyzed by using ANSYSfinite element method. Through the analysis and research of the dial type pattern, inthis paper, based on experiments a layered pattern MTSD is developed. Lots ofperformance test of this MTSD is conducted.What the thesie about the study is mainly developed in the follow5aspects:1.Firstly, combined with the source of the issue the paper discribes the issue andit′s meaning.It introduces the existing research state and the development trends ofthe c research.At the same time, it tells the main purpose and the main content.2.The paper has been systematicly analyzed the rheological properties andrheological mechanism of the Magneto-rheological Fluid.From the both macro andmicro,It also detailedly discribes the chain-process of the solid particles existing in theMagneto-rheological Fluid when the Magneto-rheological Fluid has been effected bythe the applied Magnetic field；At the same time,it tells the compositions andclassifications of the Magneto-rheological Fluid.And it discribes the all performanceindicators Influencing factors and basic parameters.4.Related magnetism simulation theories are introduced. By using ANSYS finiteelement method, the theoretical simulation and calculation of the structure project ofthe layered pattern MSTD are conducted. This provide a theory foundation for thelayered pattern MSTD.5.According to the basic parameters of the layered pattern MTSD, a MTSD prototype is developed, and a performance test platform is also developed. Thelayered pattern MTSD is compared with the dial type pattern one in their controlledoutput torque for different exciting current and driving rotate speed. The experimentdate proves that the layered pattern MSTD increases the range of the output torque.