Mineral oil based magnetorheological fluid for high power transmission and preparation method thereof

An oil-based magnetic, high-power technology, used in the petroleum industry, lubricating compositions, additives, etc., can solve the problems affecting the application of construction machinery, small shear yield stress, poor settlement stability, etc., to improve settlement stability and shear stability. Shear yield stress, prevent particle settling, reduce settling effect

Inactive Publication Date: 2015-04-29
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some progress has been made in the research and application of magnetorheological fluids, but there are still some difficult problems in magnetorheological fluids: poor sedimentation stability, high zero-field viscosity, and small shear yield stress, which seriously affect its Application in construction machinery; therefore, improving the comprehensive performance of magnetorheological fluid is very important for the practical application of magnetorheological fluid

Method used

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  • Mineral oil based magnetorheological fluid for high power transmission and preparation method thereof
  • Mineral oil based magnetorheological fluid for high power transmission and preparation method thereof
  • Mineral oil based magnetorheological fluid for high power transmission and preparation method thereof

Examples

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Embodiment 1

[0055] Prepare a mineral oil-based magnetorheological fluid for high-power transmission with a volume fraction of 20%, that is, the mass fraction of magnetic particles is 67%, and the preparation steps are:

[0056] (1 Disperse 200g of carbonyl iron powder particles after acidification and activation treatment into a three-necked bottle filled with electroless plating solution (reaction solution containing cobalt element), pass in nitrogen gas, keep ventilation during the reaction process, and heat in a water bath at 65°C Stir uniformly under the conditions for 2 hours. After the stirring is completed, the mixture is separated and washed, and vacuum-dried under low pressure to obtain cobalt-coated carbonyl iron powder particles;

[0057] (2 put a certain quality of FeC1 3 ·6H 2 O and FeCl 2 4H 2 O mixed to ensure Fe in the mixture 2+ with Fe 3+ The ratio is 1:1.5, take 150 ml Place in a four-necked flask, and stir at high speed under the condition of heating in a water b...

Embodiment 2

[0062] Prepare a mineral oil-based magnetorheological fluid for high-power transmission with a volume fraction of 25%, that is, the mass fraction of magnetic particles is 75%, and the preparation steps are:

[0063] (1 will be 305 g Carbonyl iron powder particles are acidified and activated and dispersed into a three-neck bottle filled with electroless plating solution (reaction solution containing cobalt element), and nitrogen gas is introduced to keep ventilation during the reaction process, and the water bath is heated at 70°C and stirred evenly 2 h ; After the stirring is finished, the mixture is separated and washed, and vacuum-dried under low pressure to obtain cobalt-coated carbonyl iron powder particles;

[0064] (2 obtain the modified nanometer Fe according to the step in embodiment 1 3 o 4 particles;

[0065] (3 Add a certain proportion of additives, specifically 2.6 g HT-610, 1.4 g diatomaceous earth, 2.3 g organic bentonite, 1.8 g Benzoic acid, 1.6 g of si...

Embodiment 3

[0069] Prepare a mineral oil-based magnetorheological fluid for high-power transmission with a volume fraction of 30%, that is, the mass fraction of magnetic particles is 80%, and the preparation steps are:

[0070] (1 will be 400 g Carbonyl iron powder particles are acidified and activated and dispersed into a three-neck bottle filled with electroless plating solution (reaction solution containing cobalt element), and nitrogen gas is introduced to keep ventilation during the reaction process, and the water bath is heated at 70°C and stirred evenly 2 h ; After the stirring is finished, the mixture is separated and washed, and vacuum-dried under low pressure to obtain cobalt-coated carbonyl iron powder particles;

[0071] (2 obtain the modified nanometer Fe according to the step in embodiment 1 3 o 4 particles;

[0072] (3 Add a certain proportion of additives, specifically 3.5 g HT-610, 2.2 g diatomaceous earth, 3 g organic bentonite, 1.8 g of benzoic acid, 2 g of sil...

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Abstract

The invention discloses mineral oil based magnetorheological fluid for high power transmission. The mineral oil based magnetorheological fluid comprises the following components by mass percent: 60-80% of magnetic particles, 15-40% of carrier liquid and 2-5% of additives, wherein the magnetic particles are carbonyl iron powder particles and nano ferriferrous oxide particles; the carrier liquid is mineral oil; the additives comprise a surface active agent, a thixotropic agent, an antioxidant and an antiwear agent, meanwhile, the invention further provides a preparation method of the magnetorheological fluid, and the prepared magnetorheological fluid has excellent sedimentation stability, lower zero field viscosity, higher shear yield stress and long service life, and can meet the application requirements of high power transmission devices.

Description

technical field [0001] The invention relates to a magnetorheological fluid, in particular to a mineral oil-based magnetorheological fluid for high-power transmission and a preparation method thereof, belonging to the technical field of magnetorheological fluid. Background technique [0002] Magnetorheological fluid is a liquid-solid two-phase intelligent material whose rheological properties can be controlled and constrained by an external magnetic field. It is mainly composed of micron-sized magnetic particles and additives uniformly dispersed in the carrier liquid to form a suspension liquid. When there is no external magnetic field, the apparent viscosity of this special suspension liquid is low, and it behaves as a liquid with Newtonian fluid characteristics that can flow freely; when there is an external magnetic field, the rheological properties of the liquid will change violently within a few millimeters. The change of the viscosity becomes a solid-like substance with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/04C10M161/00C10M177/00
Inventor 刘新华王利锋王忠宾谭超王冬冬陈小虎任衍坤张秋香李生鹏郑显华
Owner CHINA UNIV OF MINING & TECH
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