Lubricating grease special for gears and racks of automobile steering device and preparing method of lubricating grease

An automobile steering gear, rack and pinion technology, applied in the field of lubricating grease, can solve problems such as short lubrication life, poor anti-friction effect, narrow operating temperature range, etc., and achieve the effects of improving high temperature performance, long service life, and stable product quality

Inactive Publication Date: 2018-09-21
吉尔润科(湖南)石油化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of grease has the disadvantages of short lubrication life

Method used

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  • Lubricating grease special for gears and racks of automobile steering device and preparing method of lubricating grease

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preparation example Construction

[0030] A kind of preparation method of special lubricating grease for gear and rack of automobile steering gear adopts the following process steps:

[0031] (1) Add base oil and 12-hydroxystearic acid, which account for 1 / 3 of the total amount of base oil, into the reactor, stir and heat up to 75-85°C, and after the 12-hydroxystearic acid is completely melted, add hydrogen monohydrate Lithium oxide powder and boric acid, closed reaction kettle;

[0032] (2) Control the pressure relief valve to keep the pressure in the kettle within 0.45-0.55MPa, raise the temperature to 215°C, and keep it at this temperature for 20min;

[0033] (3) After the pressure is released, put an appropriate amount of base oil into the reactor to lower the temperature in the reactor to about 180°C, and then transfer the materials to the blender;

[0034] (4) Add the remaining base oil to cool down, and homogenize under the conditions of 80-90°C and 15-25MPa;

[0035] (5) Cooling down to below 80°C, ad...

Embodiment 1

[0038] Put 1000kg of base oil PAO9 and 270kg of lauryl hydroxystearic acid into the reactor, heat the reactor to 85°C, after the lauryl hydroxystearic acid is dissolved, add 50kg of lithium hydroxide powder into the reactor and 15kg of boric acid. Control the pressure in the kettle at 0.45-0.55MPa, rapidly raise the temperature to 213-217°C, and keep it for 20min. Then release the pressure in the kettle, add 600kg of base oil PAO9, cool down to below 180°C, and transfer to the blending kettle. Add 905kg of base oil PAO9 to cool down. At 90°C, homogenize for 2 hours under a pressure of 20MPa. When the temperature of the material drops to 80°C, add 15kg of octyl / butyl diphenylamine, 15kg of Methyl phenol, 20kg barium dinonylnaphthalene sulfonate, 30kg zinc dialkyldithiophosphate and 80kg molybdenum dialkylthiocarbamate, cyclically filtered and degassed to obtain the finished product.

Embodiment 2

[0040] Put 1000kg of 8cst III base oil and 270kg of lauryl hydroxystearic acid into the reactor, heat the reactor to 85°C, after the dodecyl hydroxystearic acid is dissolved, add 50kg of lithium hydroxide powder into the reactor and 15kg boric acid. Control the pressure in the kettle at 0.45-0.55MPa, rapidly raise the temperature to 213-217°C, and keep it for 20min. Then release the pressure in the kettle, add 600kg of 8cst III base oil, cool down to below 180°C, and transfer to the blending kettle. Add 900kg of base oil PAO9 to cool down. At 90°C, homogenize for 2 hours under a pressure of 20MPa. When the material temperature drops to 80°C, add 15kg of octyl / butyl diphenylamine, 15kg of 3,5-di-tert- n-octadecyl 4-hydroxyphenylpropionate, 10kg barium dinonylnaphthalenesulfonate, 5kg benzotriazole, 30kg dialkylmolybdenum dithiophosphate and 90kg dialkylthiocarbamate Antimony, circulating filtration, degassing to get the finished product.

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Abstract

The invention discloses lubricating grease special for gears and racks of an automobile steering device and a preparing method of the lubricating grease. The lubricating grease is prepared from, by mass, 60-85% of base oil, 7-15% of C12-C22 monoprotic organic acid, 0.2-1.0% of boric acid, 1.3-2.5% of lithium hydroxide monohydrate powder, 0.5-1.0% of antioxygen, 0.3-1.0% of antirust agent, 0.5-2.0%of dialkyl dithiophosphate and 1.5-3.0% of dialkyl thiocarbamate, wherein the C12-C22 monoprotic organic acid, the boric acid and the lithium hydroxide monohydrate powder serve as thickening agents,and the antioxygen, antirust agent, dialkyldithiophosphate, dialkyl dithiophosphate and dialkyl thiocarbamate serve as additives. Compared with the prior art, the lubricating grease has the followingadvantages that a contactor and a pressure reaction still are adopted for saponification, lithium hydroxide powder and boric acid powder are directly adopted instead of corresponding aqueous solutions, the trend of still overflowing in the production process is avoided, a large number of dehydration steps are omitted, the efficiency of the saponification reaction is greatly improved, and the production time is shortened; meanwhile, the technology is more controllable, and the product quality is stable.

Description

technical field [0001] The invention relates to the technical field of lubricating grease, in particular to a special lubricating grease for an automobile steering gear rack and a preparation method thereof. Background technique [0002] The rack and pinion steering gear is widely used in automobiles due to its simple structure, low cost, sensitive steering and small size. The lubricating grease for lubricating the rack and pinion on the steering gear is generally selected as lithium-based grease or general-purpose lithium molybdenum disulfide grease on the market. This type of grease has the disadvantages of short lubrication life, poor anti-friction effect, and narrow operating temperature range. However, with the development of the automobile industry, the requirements for the maneuverability of the automobile steering gear are also increasing. In order to ensure that the vehicle has ideal handling stability under any working conditions, it is easy to turn the steering ...

Claims

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Application Information

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IPC IPC(8): C10M169/02C10M169/04C10M169/00C10N30/06C10N30/08C10N30/10C10N40/04C10N50/10
CPCC10M169/00C10M169/02C10M169/04C10M2201/087C10M2203/065C10M2203/1025C10M2205/0285C10M2207/026C10M2207/1265C10M2207/1285C10M2207/2855C10M2207/289C10M2215/064C10M2215/223C10M2219/044C10M2219/068C10M2223/045C10N2030/06C10N2030/08C10N2030/10C10N2040/04C10N2050/10C10N2010/10C10N2010/12C10N2010/02C10N2010/04
Inventor 谭忠飞柳正明
Owner 吉尔润科(湖南)石油化工有限公司
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