Research On Magneto-rheological Torque Ervo Device

Magneto-rheological fluids materials (Magneto-rheological Fluids) are a newtype of intelligent materials that changing their rheological properties and rheologicalbehavior in the magnetic field. Domestic and foreign scholars attach great importanceto the magneto-rheological fluids. They have invested a lot of scientific manpowerand resources to carry out research and development of the magneto-rheological fluidsand its related devices. View of their good controllable rheological properties ofmagneto-rheological effect, Magneto-rheological Fluids have become an importantdirection and hot spots of today’s new smart material research and development, andalso have become the most development potential of fluids material. This paper hasstudied the basic composition and properties of magneto-rheological fluids andelaborates the mechanism of magneto-rheological fluids rheology in detail. Theseworks has laid the theoretical foundation for the follow-up magneto-rheological fluidused in the field of mechanical transmission. The magneto-rheological transmissiontheory has been studied systematically and the finite element simulation andcalculation of the magnetic structure of the magneto-rheological actuators has beenconducted. This paper has preliminarily determined the magneto-rheological torqueservo device (Magneto is-rheological the Torque Servo Devices, referred to as MTSD)design.And through the combination of the SG-MRF2035model magneto-rheologicalfluids, the trial of the MTSD prototype has been completed. Finally, the paper hasconducted the experiment of the torque transmission performance on MTSD.The main contents of this dissertation include the following aspects:1. Understanding of the research status and development trends ofmagneto-rheological technology at home and abroad, this paper describes theimportance and trends of the magneto-rheological technology used in the field ofmechanical torque transmission. At last it clarifies the main contents of thisdissertation.2. This paper discusses the rheological effect of the magneto-rheological fluidsand introduces two magneto-rheological fluids rheology theory. From the perspectiveof industrial applications, this paper describes the performance of themagneto-rheological fluids. Finally it introduces the performance parameters of themagneto-rheological fluids to be used in this paper.3. Through a combination of the characteristics of the field of mechanical torque transmission gear, the dissertation analyzes the current magneto-rheological torquetransmission device works. According to the calculation of the magneto-rheologicalfluids flow theory, this paper derives a computational model of the output torque ofthe magneto-rheological torque transmission device. This paper considers the overallstructure of the magneto-rheological torque transmission device, including the activerotor and driven rotor design, the magnetic yoke, coil layout, number of turns of thecoil and the magnetic flux, etc. This paper initially puts forward the structural schemeof the magneto-rheological fluids torque transmission device. Finally, it also analyzesthe torque servo device heat dissipation problems and discusses the correspondingsolutions.4. Through the ANSYS finite element analysis software, this paper puts thetorque transmission device structure program into a theoretical simulation. Thisprocess includes a simplified model of the magnetic circuit simulation, the design ofthe coil layout, magnetic alignment and magnetic induction generated by theexcitation current. This paper obtains the distribution map that the device gapmagnetic field intensity curve changes with different excitation current and ultimatelydetermines the reasonable structural parameters of magneto-rheological torque servodevice. The theoretical parameters provide a theoretical basis for the trial of the devicephysical prototype.5. According to the structural parameters, this paper develops amagneto-rheological fluids torque transmission device prototype. This paper also setsup a set of performance parameters test platform for the experimental prototype ofMTSD. With the test platform, it analyzes the static viscous torque of MTSDprototype under different excitation current and drive speeds. Meanwhile, this paperalso tests the static characteristics and regulation characteristics of the MTSDprototype. With the comparison analysis of experimental data and theoretical data, ithas optimized the key structural parameters.