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Magnetic liquid apparent viscosity tester and testing method thereof

A magnetic liquid, apparent viscosity technology, applied in the direction of instruments, flow characteristics, measuring devices, etc., can solve problems such as poor shielding and distortion of test results

Inactive Publication Date: 2006-02-22
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

Yang Hua and others from Beijing Institute of Technology took the lead in this attempt. They used their own developed rotary viscometer to study the change law of the viscosity of magnetic fluid under the action of an external magnetic field. The magnetic field is generated by an electromagnet, but due to poor shielding, the electromagnetic field Affects the test components in the instrument so that the test results are significantly distorted

Method used

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  • Magnetic liquid apparent viscosity tester and testing method thereof
  • Magnetic liquid apparent viscosity tester and testing method thereof
  • Magnetic liquid apparent viscosity tester and testing method thereof

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Embodiment Construction

[0011] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0012] The magnetic liquid apparent viscosity tester of the present invention is mainly composed of an adjustable permanent magnet stator 12, a rotating shaft 16, a support frame, a constant torque motor 1, a non-contact velocimeter 2, and a temperature measuring device. The adjustable permanent magnet stator 12 It consists of an inlay ring 12-2, an upper pole shoe 12-1 and a lower pole shoe 12-4 arranged at both ends of the inlay ring 12-2, and a plurality of cylindrical permanent magnets are arranged at intervals on the ring of the inlay ring 12-2 12-3 mosaic holes, the number of mosaic holes is determined according to the size of the outer diameter of the permanent magnet and the diameter of the mosaic ring 12-2, and at least one permanent magnet 12-3 is placed in the mosaic hole. Place as many blocks as you want. The adjustable permanent magnet stator ...

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Abstract

This invention relates to magnetic liquid surface viscosity test meter and its method, which adopts adjustable magnetic stator and rotor axis with high conductive magnetic cover matched with temperature measurement device and non-contact speed meter. The device is located with high conductive magnetic cover and adjustable permanent magnetic iron stator with liquid gap and the temperature measurement device and the stators are located with multiple heat couple through rotation axis moving in the stators and adopt direct current constant torque motor speed changes to test torque and adopts imbedded magnetic to control added magnetic field with the magnetic field direction vertical to the shearing surface to realize the magnetic flow viscosity testing.

Description

technical field [0001] The invention relates to a magnetic liquid apparent viscosity tester and a testing method thereof, and is especially suitable for testing the apparent viscosity of magnetic liquid in a magnetic field. Background technique [0002] The apparent viscosity of a magnetic fluid (magnetic fluid) refers to the viscosity exhibited by the magnetic fluid in an external magnetic field. For the test of apparent viscosity, foreign Mctague et al. first used a capillary viscometer to study the viscosity of cobalt tolyl magnetic fluid under an external magnetic field, but the capillary viscometer is only suitable for the determination of the viscosity of the ferrofluid with a relatively dilute concentration. When the concentration is high or When the external magnetic field is very strong, the effect of the magnetic force will exceed the effect of gravity, making it difficult for the magnetic fluid to flow. Therefore, using a capillary visc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/14
CPCG01N11/142
Inventor 杨志伊江松叶荣昌马立田程玉生刘书进刘同冈王坤东鲍久圣
Owner CHINA UNIV OF MINING & TECH
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