Hub bearing lubricating grease and preparation method thereof

A wheel hub bearing and lubricating grease technology, which is applied in the field of hub bearing lubricating grease and its preparation, can solve the problems of poor anti-wear and anti-extreme pressure performance of lubricating grease, small applicable temperature range of lubricating grease, and easy oxidation loss of lubricating grease, etc. Good pressure and wear resistance, simple and feasible production process, excellent waterproof and anti-rust performance

Inactive Publication Date: 2011-08-03
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the mechanical stability, colloidal stability, and adhesion are poor, and the phenomenon of grease leakage occurs; the water resistance of the grease is poor, and the lubrication is prone to failure when water enters; the grease is easy to oxidize and lose; Poor anti-wear and anti-extreme pressure performance; the applicable temperature range of grease is small

Method used

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  • Hub bearing lubricating grease and preparation method thereof
  • Hub bearing lubricating grease and preparation method thereof
  • Hub bearing lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Mixing: Add about 280g of mixed base oil, 80g of lauryl hydroxystearic acid, and 20g of stearic acid into the reaction kettle, raise the temperature to 100°C, and the stirring speed is 40r / min.

[0037] The base oil is a mixed oil of mineral oil, ester oil, and PAO synthetic hydrocarbon, and its kinematic viscosity at 100° C. is (130) mm2 / s.

[0038] Among the base oils, the mineral oil is mainly selected from 150BS, the synthetic hydrocarbon PAO is selected from PAO 4#, and the ester oil is selected from neopentyl polyol higher fatty acid ester 150#. The base oil content accounts for about 84% of the total grease.

[0039] The fatty acid is a mixture of 12 hydroxystearic acid and stearic acid; the ratio of the 12 hydroxystearic acid to stearic acid is 4:1.

[0040] (2) Saponification reaction: After fully mixing, add a measured lithium hydroxide aqueous solution, heat up to 100°C in the reaction kettle, and carry out saponification reaction at a stirring speed of ...

Embodiment 2

[0056] (1) Mixing: Add about 270g of mixed base oil, 80g of lauryl hydroxystearic acid, and 20g of stearic acid into the reaction kettle, raise the temperature to 100°C, and the stirring speed is 40r / min.

[0057] The base oil is a mixed oil of mineral oil, ester oil, and PAO synthetic hydrocarbon, and its kinematic viscosity at 100° C. is (130) mm2 / s.

[0058] Among the base oils, the mineral oil is mainly selected from 150BS, the synthetic hydrocarbon PAO is selected from PAO 8#, and the ester oil is selected from neopentyl polyol higher fatty acid ester 100#. The base oil content accounts for 83% of the total grease.

[0059] The fatty acid is a mixture of 12 hydroxystearic acid and stearic acid; the ratio of the 12 hydroxystearic acid to stearic acid is 4:1.

[0060] (2) Saponification reaction: After fully mixing, add a measured lithium hydroxide aqueous solution, heat up to 100°C in the reaction kettle, and carry out saponification reaction at a stirring speed of 50r / mi...

Embodiment 3

[0077] (1) Mixing: Add about 260g of mixed base oil, 80g of lauryl hydroxystearic acid, and 20g of stearic acid into the reaction kettle, heat up to 100°C, and stir at a speed of 40r / min.

[0078] The base oil is a mixed oil of mineral oil, ester oil, and PAO synthetic hydrocarbon, and its kinematic viscosity at 100° C. is (130) mm2 / s.

[0079] The mineral oil in the base oil is mainly selected from 150BS, the synthetic hydrocarbon PAO is selected from PAO 4# and PAO 8# mixed oil, and the ester oil is selected from neopentyl polyol advanced fatty acid ester 100# and 150# mixed oil. The base oil content accounts for 82% of the total grease.

[0080] The fatty acid is a mixture of 12 hydroxystearic acid and stearic acid; the ratio of the 12 hydroxystearic acid to stearic acid is 4:1.

[0081] (2) Saponification reaction: After fully mixing, add a measured lithium hydroxide aqueous solution, heat up to 125°C in the reaction kettle, and carry out saponification reaction at a stir...

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Abstract

The invention discloses a hub bearing lubricating grease and a preparation method thereof. In the lubricating grease, composite lithium soap is taken as a thickening agent, an antirusting agent, an antioxidant, an extreme-pressure anti-wear agent and a waterproofing agent are added, and a nanometer additive and the like are added according to different proportions. The lubricating grease is prepared by the processes including saponifying, dehydrating, blending, shearing, homogenizing, grinding, filtering, degassing and the like. A lubricating grease composition has the advantages of high dropping point, high wear resistance, high extreme pressure resistance, high high-low temperature performance and the like, has high water resistance and rust resistance, and is suitable for lubricating the automobile bush bearings under harsh working conditions.

Description

technical field [0001] The invention relates to lubricating grease and a preparation process thereof, in particular to a hub bearing lubricating grease and a preparation method thereof. Background technique [0002] The lubricating grease for automobile hub bearings was initially calcium-based grease thickened with anhydrous stearic acid, low freezing point, and low-viscosity mineral oil. , The use temperature of sodium-based grease is higher than that of calcium-based grease, but its water resistance is poorer; later, barium-based grease, calcium-composite grease, and lithium-complex grease were successively developed. At present, the hub bearing lubricating grease is mainly based on lithium soap or complex lithium soap, such as general-purpose lithium-based grease, lithium-complex grease, extreme-pressure lithium-complex grease, general-purpose lithium-based grease for automobiles, etc. However, in actual use, there is a big difference between the grease selection of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/06C10M177/00C10N40/02C10N30/06C10N30/12C10N50/10
Inventor 谢小鹏陈树林
Owner SOUTH CHINA UNIV OF TECH
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