1992 Fiscal Year Final Research Report Summary
DEVELOPMENTAL STUDY ON HIGH PERFORMANCE TORQUE CONVERTER USING MAGNETIC FLUID
| Project/Area Number |
03555036
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | NAGOYA UNIVERSITY |
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Principal Investigator |
KIKUYAMA Koji NAGOYA UNIVERSITY, ENGINEERING DEPARTMENT, PROFESSOR, 工学部, 教授 (90023192)
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| Co-Investigator(Kenkyū-buntansha) |
OHMI Atsushi AISHIN SEIKI CO.LTD, MANAGER, 主査
KATAGIRI Hidenori TOYOTA MOTOR COL.LTD, ASSISTANT MANAGER, 担当員
KUMADA Yoshio TAIHO KOGYO CO.LTD, ASSISTANT GENERAL MANAGER, 次長
NISHIBORI Kenji DAIDO INSTITUTE OF TECHNOLOGY, ENGINEERING DEPARTMENT, ASSOCIATE PROFESSOR, 助教授 (50115614)
HASEGAWA Yutaka NAGOYA UNIVERSITY, ENGINEERING DEPARTMENT, ASSISTANT PROFESSOR, 工学部, 講師 (20198732)
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| Project Period (FY) |
1991 – 1992
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| Keywords | MECHATRONICS / MAGNETIC FLUID / FLUID MACHINERY / TORQUE CONVERTER / ROTATING DISK |
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| Research Abstract |
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.
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