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Grease composition for automobile wheel hub bearings and its preparation method

An automobile wheel hub and bearing lubrication technology, applied in the field of grease, to achieve the effect of extending the service life of the bearing, short lubrication life and good fluidity

Inactive Publication Date: 2014-01-08
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to invent a lubricating grease for automobile wheel hubs by adjusting the formula and process of the lubricating grease, so as to ensure that the lubricating grease has excellent resistance to high temperature leakage, adhesion to metal surfaces, and better ability to control temperature rise , to a certain extent alleviate the high temperature softening loss and early failure of lubrication caused by design and use characteristics

Method used

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  • Grease composition for automobile wheel hub bearings and its preparation method
  • Grease composition for automobile wheel hub bearings and its preparation method
  • Grease composition for automobile wheel hub bearings and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0034] Example 1: Each component is calculated based on the total weight of the composition, including:

[0035] (1) Base oil 86.0%;

[0036] (2) Thickening agent 13.0%;

[0037] (3) Antioxidant 0.5%.

[0038] (4) Tackifier 0.5%

[0039] Calculate based on the total amount of the above components as 100%, add 0.3‰ of metal deactivator

[0040] Combine 300 g of 12-hydroxystearic acid, 50 g of azelaic acid, 25 g of sebacic acid and 1200 g of base oil (flash point of 270℃, viscosity of 180mm at 40℃) 2 / s) Put it into a pressure reactor, heat it to 90-100°C, and add 75.5 g of lithium hydroxide monohydrate aqueous solution. Warm up to 120-140℃ to start timing saponification. After 120min of saponification, release the pressure and add 600g of base oil, heat to 130-150℃, perform compound reaction for 60min, continue heating to 200-220℃, use 600g of base oil Cool in the reactor. After cooling, the temperature is controlled at 150-190℃ and the temperature is kept for 60min. Add the remaining 5...

example 2

[0041] Example 2: Each component is calculated based on the total weight of the composition, including:

[0042] (1) Base oil 85.0%;

[0043] (2) Thickening agent 14.0%;

[0044] (3) Antioxidant 0.5%.

[0045] (4) Tackifier 0.5%

[0046] Calculate based on the total amount of the above components as 100%, add 0.3‰ of metal deactivator

[0047] Combine 225 g of 12-hydroxystearic acid, 85 g of 1,10 sebacic acid and 909 g of base oil (flash point of 260℃, viscosity of 150mm at 40℃) 2 / s) Put it into a pressure reactor, heat it to 90-100°C, and add an aqueous solution of 55.6 g monohydrate lithium hydroxide and 7.9 g calcium hydroxide. Warm up to 120-140℃ to start timing saponification. After 120min of saponification, release the pressure and add 455g of base oil, heat up to 130-150℃, perform compound reaction for 60min, continue heating to 200-220℃, use 455g of base oil Cool in the reactor. After cooling, the temperature is controlled at 150-190℃ for 60min. Add the remaining 447g base oil...

example 3

[0048] Example 3: Each component is calculated based on the total weight of the composition, including:

[0049] (1) Base oil 84.0%;

[0050] (2) Thickening agent 15.0%;

[0051] (3) Antioxidant 0.5%.

[0052] (4) Tackifier 0.5%

[0053] Calculate based on the total amount of the above components as 100%, add 0.3‰ of metal deactivator

[0054] Combine 250 g of hydrogenated castor oil, 60 g of sebacic acid and 824 g of base oil (flash point of 280℃, viscosity of 250mm at 40℃) 2 / s) Put it into a pressure reactor, heat it to 90-100°C, and add an aqueous solution of 50.9 g monohydrate lithium hydroxide and 7.8 g calcium hydroxide. Warm up to 120-140℃ to start timing saponification. After 120min of saponification, release the pressure and add 412g of base oil, heat to 130-150℃, perform compound reaction for 60min, continue heating to 200-220℃, use 412g of base oil Cool in the reactor. After cooling, the temperature is controlled at 150-190℃ and the temperature is constant for 60min. Add th...

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Abstract

The present invention provides a grease composition for automobile wheel hub bearings and its preparation method; the grease composition includes 84-89% of base oil, 10-54% of a thickener, 0.5% of an antioxidant and 0.5% of a tackifier; and 0.03% of a metal deactivator which is calculated by taking the total amount of the above components as 100%, is added. According to the grease composition and its preparation method, by adjusting the grease formulation and process, an optimum complex soap fiber structure is obtained, so that the shape and size of soap fiber and acting force among the soap fiber are proper, the grease has good capability to control the bearing temperature rise, the grease has the advantages of excellent high temperature loss resistance, good metal surface adhesion, lubrication and seal performances and the like, and also has good capability to control the temperature rise, the high temperature softening loss and early lubrication failure problems caused by the design and use characteristics can be alleviated, and the grease has the multi-effect and general characteristics of common complex soap base greases, and can better meet the requirements of the automotive wheel hub bearings on lubrication.

Description

Technical field [0001] The invention belongs to the technical field of lubricating greases, and particularly relates to a lubricating grease composition for automobile wheel hub bearings and a preparation method thereof. Background technique [0002] The automobile wheel hub is a very important safety part of the automobile. Its main function is to bear the weight and provide precise guidance for the rotation of the wheel hub. Some foreign bearing manufacturers have designed and produced integrated commercial wheel hub units, which greatly improves the overall economy and reliability of the bearings. However, most of the domestic commercial wheel hub bearings use traditional double-row tapered roller bearings, which have not changed much in form over the years. With the rapid development of my country's automobile industry, the load capacity has increased and the driving speed has increased. The safety performance and quality stability of automobiles, especially trucks, have att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10M117/00C10M161/00C10N40/02C10N50/10C10N30/08C10N30/06C10N30/02
Inventor 吴凤华吴宝杰王清国桃春生冯强高艳青赵宏斐
Owner CHINA PETROLEUM & CHEM CORP
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