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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 grease; ordinary grease cannot bear the high load of the boom, and the lubrication effect is not good, so that the steel plate and slider of the boom are severely worn, And the number of fatliquoring increases

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

Embodiment

[0023] Some raw materials:

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

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

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

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

example 1-6

[0029] Take by weighing monobasic fatty acid or lauryl hydroxystearic acid, be selected from at least one dibasic acid in terephthalic acid and C2-C8 dibasic acid, base oil, 12% calcium hydroxide and / or lithium hydroxide, placed in a reactor and heated to 80°C, saponified for 3 hours. Then heat up to 210°C, keep warm for 15 minutes, add base oil to adjust the amount of soap, and cool to 120°C. Add graphite powder, extreme pressure additives, organic ester and optional hydrophobic agent, grind and disperse, dewater and degas by low-pressure distillation, and cool naturally to form fat. Six samples S1-S6 are obtained respectively.

[0030] Table 1. The raw material formula of embodiment 1-6

[0031]

[0032]

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

[0034]

example 1

[0035] Examples 1 and 5 lack hydrophobic agent and PTFE powder, showing poor water washout resistance, so the service life will be shorter; Example 1 lacks graphite and other extreme pressure additives in low percentages, showing poor extreme pressure. Pressure wear resistance; In addition to adding graphite powder, example 2 and example 4 also added didecyl zinc dithiophosphate and molybdenum disulfide, and the extreme pressure wear resistance is slightly poor; In addition to adding graphite powder, example 3 also Molybdenum didecyl dithiocarbamate was added, which showed better extreme pressure wear resistance; Example 5 only added an appropriate amount of extreme pressure additives, so the extreme pressure performance was better, but the water shower resistance and oil separation performance And low temperature performance is relatively poor; Example 6 adopts eight kinds of additives to add in appropriate proportion simultaneously, shows 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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