DEVELOPMENTAL STUDY ON HIGH PERFORMANCE TORQUE CONVERTER USING MAGNETIC FLUID

本文从理论和实验两方面研究了在盘壳之间分别引入粘性非磁性流体和磁性流体时，盘壳中的盘的转矩性能。当径向有缝圆盘在粘性流体中旋转时，流体沿着狭缝流动，并且由于在较高雷诺数下盘和壳体之间的角动量交换的增强而引起传递扭矩的增加，而不管切向角动量的减小如何。磁盘的接触面积。(2)封闭的磁性流体：当磁性流体部分地引入到空间中并且通过线圈的电流改变磁场的强度时，检查了不同类型的转换器的转矩性能。垂直轴转换器：由于磁场可以改变盘壳间流体的体积，因此粘性应力传递扭矩的大小受磁场强度的控制。旋转盘上的狭缝被发现可以增加传递的转矩并改善开关性能。B.水平轴转换器：由于磁性流体的存储空间不足，可控转矩的范围被发现减小。在盘的高旋转速度下，由于施加在流体上的离心力的增加，流体不能维持在空间中。

Torque performance of a disk enclosed in a housing was studied both theoretically and experimentally when a viscous non-magnetic and magnetic fluids, respectively, was introduced into the space between the disk and housing Following results were obtained :(1) Non-magnetic fluid enclosed :When a radially slitted disk rotates in a viscous fluid, the fluid flows along the slits and cause an increase in the transmitted torque due to the enhancement of the angular momentum exchange between the disk and housing at a higher Reynolds number irrespective of the decrease in the tangential contact area of the disk.(2) Magnetic fluid enclosed :The torque performance of different types of converter was examined when a magnetic fluid is partially introduced into the space and the strength of the magnetic field was changed by the electric current through a coil.A. Vertical axis converter : The amount of the transferred torque by viscous stress was proved to be controlled by the change of the strength in magnetic field because the volume th the fluid between the disk and housing could be changed by the magnetic field. Slits in the rotating disk were found to increase the transferred torque and improve the switching performance.B.Horizontal axis converter : The range of the controllable torque was found to be decreased because of the lack in the storage space of the magnetic fluid. At high rotational speed of the disk the fluid could not be sustained in the space due to the increase in the centrifugal force exerted on the fluid.