Lubricating grease composition for gears of electric shovel and preparation method thereof

A technology of gear grease and composition, applied in the field of grease, can solve the problems of large environmental temperature difference, scouring by rain and snow, many dust impurities, etc., and achieve the effects of prolonging the grease changing period, saving energy consumption and simple process

Active Publication Date: 2014-12-10
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the existing problems, the present invention compares base oil, thickener, additives, fat-making process and physical and chemical indicators, and combines the working characteristics of the electric shovel with dust and impurities, impact load, large environmental temperature difference, rain and snow erosion, etc.

Method used

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  • Lubricating grease composition for gears of electric shovel and preparation method thereof
  • Lubricating grease composition for gears of electric shovel and preparation method thereof
  • Lubricating grease composition for gears of electric shovel and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Base oil: 73.7%;

[0031] Thickener: 18.1%;

[0032] Additives: 8.2%;

[0033] Quality Total: 100%

[0034] Wherein the thickener is:

[0035] 12-Hydroxystearic acid: 14.1%

[0036] Adipic acid: 1.3%

[0037] Salicylic Acid: 2.7%

[0038] The additives are:

[0039] Polyacrylic acid: 3.8%;

[0040] Extreme pressure agent (molybdenum disulfide, graphite, A): 1.9%;

[0041] Rust inhibitor (sorbitol monooleate): 1.0%;

[0042] Repair agent (nano-silver powder and nano-zinc oxide): 1.0%;

[0043] Antioxidant (phenothiazine): 0.5%;

[0044] Add 14.1% 12-hydroxystearic acid, 2.7% salicylic acid and 3.8% polyacrylic acid to 73.7% base oil by mass, mix and heat to 60-90°C , add lithium hydroxide monohydrate saponification composite of 1.3% adipic acid in parts by mass for 1.5-2 hours; heat up to 185-190°C in 2 hours, keep the temperature constant for 1.5 hours; continue to heat up to 220-240°C, and then naturally Cool down to below 120°C, add extreme pressure agen...

Embodiment 2

[0046] Base oil: 50%;

[0047] Thickener: 25%;

[0048] Additives: 25%;

[0049] Quality Total: 100%

[0050] Wherein the thickener is:

[0051] 12-Hydroxystearic acid: 20.3%

[0052] Adipic acid: 1.3%

[0053] Salicylic Acid: 3.4%

[0054] The additives are:

[0055] Polyacrylic acid: 8.0%;

[0056] Extreme pressure agent (molybdenum disulfide, graphite, A): 5.0%;

[0057] Rust inhibitor (sorbitol monooleate): 5.0%;

[0058] Repair agent (nano-silver powder and nano-zinc oxide): 5.0%;

[0059] Antioxidant (phenothiazine): 2.0%.

[0060] Add 20.3% 12-hydroxystearic acid, 3.4% salicylic acid and 8.0% polyacrylic acid to 50% base oil, mix and heat to 60-90°C , add lithium hydroxide monohydrate saponification composite of 1.3% adipic acid in parts by mass for 1.5-2 hours; heat up to 185-190°C in 2 hours, keep the temperature constant for 1.5 hours; continue to heat up to 220-240°C, and then naturally Cool down to below 120°C, add extreme pressure agents (molybdenum di...

Embodiment 3

[0062] Base oil: 84%;

[0063] Thickener: 8%;

[0064] Additives: 8%;

[0065] Quality Total: 100%

[0066] Wherein the thickener is:

[0067] 12-Hydroxystearic acid: 5.9%

[0068] Adipic acid: 0.6%

[0069] Salicylic Acid: 1.5%

[0070] The additives are:

[0071] Polyacrylic acid: 3.0%;

[0072] Extreme pressure agent (molybdenum disulfide, graphite, A): 1.0%;

[0073] Rust inhibitor (sorbitol monooleate): 1.0%;

[0074] Repair agent (nano-silver powder and nano-zinc oxide): 1.0%;

[0075] Antioxidant (phenothiazine): 2.0%.

[0076] Add 5.9% 12-hydroxystearic acid, 1.5% salicylic acid and 3.0% polyacrylic acid to 84% base oil by mass, mix and heat to 60-90°C , add the lithium hydroxide monohydrate saponification compound that the mass fraction is 0.6% adipic acid 1.5~2 hours; Take 2 hours to heat up to 185~190 ℃, this temperature is kept at a constant temperature for 1.5 hours; Continue to heat up to 220~240 ℃, and then naturally Cool down to below 120°C, add e...

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Abstract

The invention provides a lubricating grease composition for gears of an electric shovel and a preparation method thereof. A thickening agent is prepared from reactants of 12-hydroxy stearic acid, hexanedioic acid, salicylic acid and lithium hydroxide; and additives comprise polyacrylic acid copolymer, an extreme pressure agent, an antirust agent, a restoring agent and an antioxidant. The preparation method comprises the following steps: adding 12-hydroxy stearic acid, salicylic acid and polyacrylic acid into base oil, mixing, and heating to 60-90 DEG C; adding lithium hydroxide monohydrate containing hexanedioic acid, saponifying and compounding for 1.5-2 hours; heating to 185-190 DEG C in 2 hours, and keeping the temperature for 1.5 hours; continuously heating to 220-240 DEG C, and naturally cooling to a temperature below 120 DEG C; sequentially adding the extreme pressure agent, the antirust agent, the restoring agent and the antioxidant; pressing oil for three times by virtue of a three-roller machine after the temperature is reduced to 40-60 DEG C, and then canning. The lubricating grease can be widely applied to mineral mechanical industry, and is capable of reducing abrasion and prolonging the cycle for changing grease.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to a composition and a preparation method of electric shovel gear lubricating grease. Background technique [0002] The modern electric shovel originated from the steam shovel. In 1835, American Williams Otis designed the world's first single-bucket excavator driven by a steam engine, semi-rotary, rail-type, and iron-wood hybrid structure. With the development of open-pit mining technology in the 1970s, large electric shovels for stripping gradually gave way to smaller electric shovels for mining, coupled with mining trucks. Until now, this type of electric shovel has been used in open-pit mining. The main equipment in. This method has great flexibility, improves the efficiency of mining equipment, and at the same time, has a short infrastructure period and low investment, and is suitable for mines with complex terrain. The electric shovel has a high start-up rate in th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M177/00C10N40/04C10N50/10
Inventor 吴宝杰杨文义薛万安李勇刘振国高艳青郭振俊包锐
Owner CHINA PETROLEUM & CHEM CORP
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