Bearing lubricating grease and preparation method thereof

A bearing lubrication and formulation technology, applied in the direction of lubricating composition, petroleum industry, etc., can solve problems such as affecting the life of grease, and achieve the effect of high dropping point

Active Publication Date: 2013-03-20
安徽意博润滑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] However, in the prior art, the dropping point of the lithium complex grease is less than 300°C, which seriously affects the service life of the grease

Method used

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  • Bearing lubricating grease and preparation method thereof
  • Bearing lubricating grease and preparation method thereof
  • Bearing lubricating grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] A preparation method of bearing grease, comprising the following steps:

[0083] (1) Heat 300g of base oil (600SN mineral oil) to 70-100°C, add 85g of 12-hydroxystearic acid to dissolve fully; when the temperature rises to 90-105°C, slowly add an aqueous solution containing 8.55g of lithium hydroxide , carry out the saponification reaction;

[0084] (2) After the reaction system reaches an appropriate consistency, add 8.5g of boric acid to the common reaction, and continue to add 7g of lithium hydroxide aqueous solution until the addition is complete;

[0085] (3) The temperature was raised to 140-160°C for dehydration, 30g of sebacic acid was added and 100g of cold base oil was added, and the system was cooled to 95-110°C; an aqueous solution containing 14.4g of lithium hydroxide was added again to carry out the saponification composite reaction;

[0086] (4) Continue to heat and dehydrate the temperature to 210-230°C, keep the temperature at the highest refining temp...

Embodiment 2

[0088] A preparation method of bearing grease, comprising the following steps:

[0089] (1) Reactor 1 enters 50kg of base oil (600SN base oil) and heats it up to 70-100°C, adds 13.5kg of 12-hydroxystearic acid to dissolve fully, enters into the saponification kettle through filtration, and cleans the reactor with 10kg of base oil , and transferred to the saponification kettle; when the material is heated to 90-105 ° C, slowly add an aqueous solution containing 2.46 kg of lithium hydroxide to carry out the saponification reaction;

[0090] (2) After the reaction system reaches an appropriate consistency, add 1.35kg of boric acid to the common reaction, and continue to add the remaining aqueous solution of lithium hydroxide until the addition is complete;

[0091] (3) heat up to 140-160°C for dehydration, add 4.7kg of sebacic acid to dissolve completely, add 20kg of base oil, and cool down to 95-110°C; add an aqueous solution containing 2.28kg of lithium hydroxide again to carry...

Embodiment 3

[0094] In this example, synthetic base oil is selected, and polyalphaolefin and ester mixed oil (v:v=1:1) is selected. The amount of thickener and additive and the preparation method are the same as in Example 1, and the prepared lubricating grease has more Good performance and service life.

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Abstract

The invention relates to bearing lubricating grease comprising the following components of: (a) a compound thickening agent formed by lithium 12-hydroxystearate soap, lithium binary acid soap and lithium borate, (b) an additive, and (c) base oil, wherein the compound thickening agent is formed by soapnifying 12-hydroxystearic acid, binary acid and boric acid with lithium hydroxide; and the additive amount of the boric acid is 1-5 parts by weight while the weight of the base oil is 100 parts by weight, wherein the additive is one or combination of at least two of an antioxidant, an antirusting agent, an anti-wear reagent at extreme pressure and a metal passivator. The dropping point temperature of the bearing lubricating grease provided by the invention is more than or equal to 300 DEG C, and the bearing lubricating grease provided by the invention does not collapse or fade and has the characteristics of long service life, silence and high temperature resistance.

Description

technical field [0001] The invention relates to a lubricating grease and a preparation method thereof, in particular to a bearing lubricating grease and a preparation method thereof. In particular, the lubricating grease is a high-temperature composite lithium-based lubricating grease mainly for deep groove ball bearings. Background technique [0002] Grease is a lubricant often used in the lubrication of mechanical equipment bearings, gears and other sliding parts, and plays an important role in industrial production. The requirements for the use of lubricating grease for small to medium-sized bearings have been increasing, not only to meet the high temperature but also to meet the quiet requirements, but also to achieve long life or lifetime lubrication. [0003] Lithium complex grease came out in 1962, and it has become a very important type of grease, and the proportion of annual output is increasing year by year. The complex lithium-based grease is formed by the co-cry...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N40/02
Inventor 张燕李青江良所沈浩王晓杰
Owner 安徽意博润滑科技有限公司
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