Grease for low speed and heavy duty

A low-speed heavy-duty, grease technology, applied in the field of grease, can solve the problems of difficult to meet the use requirements of the boom, the wear of the boom steel plate and slider, and the inability to withstand the high load of the boom. Low temperature performance, extended service life, good lubrication effect

Inactive Publication Date: 2011-02-16
SANY AUTOMOBILE HOISTING MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing ordinary grease is difficult to meet the requirements of the boom
The reason is that the harsh operating environment of the boom tends to greatly reduce or even lose the lubricating effect of the g

Method used

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  • Grease for low speed and heavy duty
  • Grease for low speed and heavy duty
  • Grease for low speed and heavy duty

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example

[0023] Some raw materials:

[0024] Mercaptopolysiloxane emulsion: provided by Nanjing Hualiming Chemical Co., Ltd.;

[0025] Polymethyltriethoxysilane: provided by Zhejiang Quzhou Zhengbang Organic Silicon Co., Ltd.;

[0026] Polyethylene wax: Provided by Jiande Huachen Chemical Co., Ltd.;

[0027] Graphite powder: Provided by Qingdao Dongkai Graphite Co., Ltd.

Example Embodiment

[0028] Examples 1-6

[0029] Weigh out monobasic fatty acid or dodecanoic acid, at least one dibasic acid selected from terephthalic acid and C2-C8 dibasic acid, base oil, 12% calcium hydroxide and / Or lithium hydroxide, heated to 80°C in a reactor, and saponified for 3 hours. Then the temperature was raised to 210°C, the temperature was kept for 15 minutes, the base oil was added to adjust the soap amount, and it was cooled to 120°C. Add graphite powder, extreme pressure additives, organic esters and optional hydrophobic agents, grind and disperse, distill under low pressure to remove water and gas, cool naturally to form fat, and obtain 6 samples S1-S6 respectively.

[0030] Table 1. The raw material formulations of Examples 1-6

[0031]

[0032]

[0033] Table 2. Performance parameters of sample S1-S6

[0034]

Example Embodiment

[0035] Examples 1 and 5 lack hydrophobizing agent and polytetrafluoroethylene powder, showing poor water leaching resistance, so the service life will be shorter; Example 1 lacks graphite and has a low percentage of other extreme pressure additives, showing poor extremes In addition to graphite powder, zinc didecyl dithiophosphate and molybdenum disulfide are also added in Examples 2 and 4, which is slightly worse in extreme pressure wear resistance. In addition to graphite powder, Example 3 Added molybdenum didecyl dithiocarbamate, showing good extreme pressure wear resistance; Example 5 only added a proper amount of extreme pressure additives, so the extreme pressure performance is better, but the water leaching performance, oil separation performance And low temperature performance is poor; Example 6 uses eight kinds of additives at the same time to add in appropriate proportions, showing good overall performance.

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Abstract

The invention relates to grease for low speed and heavy duty. The grease contains 8-20% of thickening agents, 1-4% of graphite powder, 0.3-6% of other extreme pressure additives, 0.3-6% of organic ester and the balance base oil by weight, wherein other extreme pressure additives are one or more of zinc dialkyldithiophosphate, molybdenium disulfide, molybdenum dialkyldithiocarbamate and other organic molybdenum salt containing alkyl; and the organic ester is tetrabutyl titanate, phosphate ester or combination of tetrabutyl titanate and phosphate ester.

Description

technical field [0001] The invention relates to a lubricating grease suitable for low speed and heavy load. Background technique [0002] Grease is a plastic semi-solid to solid lubricating material composed of thickener and base oil. It forms a stable solid-liquid colloidal dispersion system by uniformly dispersing the thickener micelles in the liquid lubricant medium, also known as thickened lubricant. Due to its inherent excellent characteristics, grease can not only meet the general lubrication requirements, but also has the special requirements of extreme pressure, wear resistance and sealing performance that conventional grease cannot meet. It has been familiar and widely used by people for a long time. Used in transmission and sliding parts of various machinery. Especially in the fields of steel, automobile, engineering machinery, military industry, aviation and aerospace, grease is an indispensable and important material. The use of lubricating grease can simplify...

Claims

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Application Information

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IPC IPC(8): C10N30/06C10N50/10C10M169/06
Inventor 何曲波查铂张晓广赵信毅
Owner SANY AUTOMOBILE HOISTING MACHINERY
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