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Magnetic rheology liquid and preparing method

A magnetorheological fluid and magnetic field technology, applied in the petroleum industry, additives, lubricating compositions, etc., can solve the problems of destroying the conditions for forming stable colloids, large magnetic particle size, and high cost of magnetorheological fluids, and achieve excellent quality Anti-wear performance, excellent lubricating performance and, the effect of excellent anti-wear performance

Inactive Publication Date: 2005-08-31
吕崇耀
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that even if this data can be obtained using an accurate mathematical model and computer optimization design based on it, it is not easy to maintain this optimal apparent viscosity value in practice. No matter what method is used to reduce the apparent viscosity, this compensation must be realized through the change of the characteristics of the grease itself, that is, the apparent viscosity of the grease is artificially adjusted online, and the surface viscosity of the grease is reduced when the temperature rises. The apparent viscosity increases, and the apparent viscosity of the grease decreases when the temperature decreases
[0003] 2. Although it has been more than half a century since the invention of magnetic fluid (nanoscale), magnetic fluid is only used for vacuum sealing and heat dissipation of speakers; in electromechanical devices, especially clutches, brakes, shock absorbers, shock absorbers, There is still no engineering practice for locking devices and clamping devices, the main reason being that the shear stress provided by the magnetic fluid is too small
Magnetorheological fluids can provide super shear stress, but the size of the magnetic particles is too large, which destroys the conditions for forming stable colloids. Phase separation and precipitation are a major problem in the wide application of magnetorheological fluids
The cost of producing magnetorheological fluid with stable performance is high (US LORD Company, etc.), and the process is complicated. For example, thickener is used to thicken the base oil or base oil and magnetic particles like the production of grease.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] A magnetorheological fluid is composed of diluted traditional lubricating grease, a magnetic field responsive material with a particle size of 1 micron to 100 microns, an antioxidant, and a metal rust inhibitor. First, mix 18.39 parts of transformer oil with 7.88 parts of steam turbine oil, mix them thoroughly, add 5.45 parts of lithium-based grease for automobiles, and heat at 80°C to form a thinned traditional lubricating grease with a weight of 31.72 parts; Secondly, under the premise of sufficient stirring, slowly add 61.28 parts of carbonyl iron powder I (average particle size 2 microns) into 31.72 parts of diluted traditional grease; finally add 1.16 parts of 2,6-di-tert-butyl-p-cresol , 2.92 parts of dodecenyl succinic acid and 2.92 parts of sorbitan monooleate, fully stirred for 1 hour to obtain 100 parts of a novel multifunctional lubricating grease.

example 2

[0033] A new type of multifunctional lubricating grease is composed of thinned traditional lubricating grease, magnetic field response sensitive material, antioxidant and metal antirust agent. First, mix 24.06 parts of transformer oil with 9.02 parts of steam turbine oil, mix them thoroughly and add them to 8.08 parts of calcium-based grease, and heat them at 80°C to form a thinned traditional lubricating grease with a weight of 41.16 parts; Slowly add 50.12 parts by weight of carbonyl iron powder II (average particle size 3 microns) to 41.16 parts by weight of diluted traditional lubricating grease under the premise of sufficient stirring; Dienyl succinic acid weighs 3.71 parts, sorbitan monooleate weighs 3.51 parts and oleic acid weighs 0.5 parts, fully stirs 1 hour and can make described a kind of novel multifunctional lubricating grease weight 100 parts.

example 3

[0035] A new type of multifunctional lubricating grease is composed of thinned traditional lubricating grease, magnetic field response sensitive material, antioxidant and metal antirust agent. First, mix 13.16 parts of transformer oil with 5.85 parts of steam turbine oil, and then add them into 8.04 parts of lithium-based grease after mixing them thoroughly. After fully stirring at 80°C, a thinned traditional lubricating grease with a weight of 27.06 parts is formed; secondly, Under the premise of sufficient stirring, slowly add 71.75 parts of carbonyl iron powder III (average particle size 5 microns) into 27.06 parts of diluted traditional grease; finally add 0.4 parts of 2,6-di-tert-butyl p-cresol Dienyl succinic acid weight 0.4 part and sorbitol monooleate weight 0.4 part, fully stir 1 hour and can make described a kind of novel multifunctional lubricating grease weight 100 parts.

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Abstract

A magnetic rheologic liquid as a multifunctional lubricating grease is prepared from diluted or semi-fluid lubricating grease, superfine magnetic field response sensitive particles, antioxidizing agent and metallic antirust agent through sequential mixing and stirring.

Description

Technical field [0001] The invention relates to a magnetorheological fluid and a preparation method thereof. technical background [0002] 1. As stated in "Industrial Lubricants" and "Lubricant Production and Application", different from filler-free greases, there are filler-type metal sulfide greases (such as molybdenum disulfide grease, aluminum sulfide grease, Antimony sulfide grease), metal oxide grease (such as aluminum oxide, zinc oxide, titanium oxide grease), etc. have given grease more functions, such as metal sulfide grease, especially molybdenum disulfide The anti-wear and lubricating effects of grease have been widely used in the industry. However, the large loss of frictional power at low temperature, easy loss at high temperature, and wide range of viscosity changes have always been the shortcomings of traditional lubricating greases. However, the problem of high frictional power loss at low temperature and easy loss at high temperature is contradictory to a ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M161/00
Inventor 吕崇耀
Owner 吕崇耀
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