Temperature field of the instrument for measuring the yield stress of magnetorheological fluid

摘要

To obtain the temperature distribution of the instrument for measuring yield stress of magnetorheological fluid and the influence rule of deformation caused by temperature on the magnetic field between disks, on the basis of thermal conduction theory, the temperature field and deformation of disks is studied by the finite element method, the results indicate that the temperature increases along the radius, the highest temperature appears in the section near the edge of disk, the temperature difference is small and the value is 10°C; during the time of 300s, the temperature rises approximately linearly; the structural sizes of disks have an attractive influence on the temperature field, when the slip power is unchanged, the larger the thickness and radius of disk, the lower the average temperature; when the speed keeps constant, the larger the radius the disk, the higher the average temperature and the temperature difference; the deformation of disk is mainly caused by thermal expansion of material and the maximum deformation is 1.38×10−5 mm.