Ultralow-temperature bearing lubricating grease composition and preparation method thereof

A bearing lubrication and composition technology, applied in the field of ultra-low temperature bearing grease composition and preparation, can solve the problems of damage to parts such as machinery and motors, large changes in grease viscosity, affecting the normal use of equipment, etc., achieving long service life, excellent low temperature and other problems. Flow properties, the effect of shortening the saponification time

Inactive Publication Date: 2014-11-26
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under ultra-low temperature conditions, the viscosity of the grease changes too much, resulting in a large starting torque of the bearing. Long-term use will cause damage to the machine mot

Method used

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  • Ultralow-temperature bearing lubricating grease composition and preparation method thereof
  • Ultralow-temperature bearing lubricating grease composition and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1 Add 90g of stearic acid in the thickener to 400g of autoclave oil. The autoclave oil is a synthetic oil. Add 14.5g of lithium hydroxide, raise the temperature to 90°C, and then add 10g of dodecahydroxy stearic acid after the reaction is completed. Fatty acids react. After the drainage is completed, add 70g of ester oil to the reaction kettle, stir and heat to 185-205°C, add the remaining 400g of ester oil to cool, add 10g of antioxidant dioctyl diphenylamine, continue to stir, and cool down naturally After reaching 70-80°C, add 5g of barium petroleum sulfonate, 5g of sodium petroleum sulfonate, anti-rust agent, and 10g of di-n-butyl phosphite as an anti-wear agent, stir evenly, and after post-processing, check the noise level, the finished tank Pack.

Embodiment 2

[0028] Example 2 Add 85g of stearic acid in the thickener to 345g of autoclave oil. The autoclave oil is synthetic oil. Add 15.7g of lithium hydroxide, raise the temperature to 90°C, and then add 15g of dodecahydroxy stearic acid after the reaction is completed. Fatty acids react. After the drainage is completed, add 100g of ester oil to the reaction kettle, stir and heat to 185-205°C, add the remaining 400g of ester oil to cool, add 10g of antioxidant dioctyl diphenylamine, continue to stir, and cool down naturally After reaching 70-80°C, add 10g of barium petroleum sulfonate as an anti-rust agent, 5g of di-n-butyl phosphite and 5g of tricresyl phosphate as anti-wear agents, stir evenly, and perform post-treatment to detect the noise level. The finished tank Pack.

Embodiment 3

[0029] Example 3 Add 80g of stearic acid in the thickener to 275g of autoclave oil. The autoclave oil is synthetic oil. Add 15.7g of lithium hydroxide, raise the temperature to 90°C, and then add 20g of dodecahydroxy stearic acid after the reaction is completed. Fatty acids react. After the drainage is completed, add 200g of ester oil to the reaction kettle, stir and heat to 185-205°C, add the remaining 400g of ester oil to cool, add 5g of diisooctyl diphenylamine, 10g of 2,6-di- After tert-butyl-p-cresol, continue to stir, and after naturally cooling down to 70-80°C, add 5g of sodium petroleum sulfonate as a rust inhibitor, and 10g of tricresyl phosphate as an anti-wear agent, stir evenly, and perform post-treatment, The noise level is detected and the finished product canned.

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PUM

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Abstract

The invention relates to an ultralow-temperature bearing lubricating grease composition and a preparation method thereof. The ultralow-temperature bearing lubricating grease composition comprises 10-20% of a thickener namely lithium 12-hydroxystearate-lithium stearate complex soap, 75-85% of base oil, 0.5-4.0% of an additive (a) namely arylamine and/or phenol antioxidant, 0.5-1.5% of an additive (b) namely a sulfonate rust inhibitor and 0.5-2% of an additive (c) namely a phosphorus antiwear additive. The ultralow-temperature bearing lubricating grease composition comprises the following steps: adding stearic acid into the thickener to react, and adding 12-hydroxystearic acid to react; and adding 1/2-2/3 of base oil into a reaction kettle, heating to 185-205 DEG C while stirring, adding the rest of base oil, cooling, adding the antioxidant, continuously stirring, naturally cooling to 70-80 DEG C, adding the rust inhibitor and antiwear additive, stirring uniformly, carrying out after-treatment, and canning the finished product. The lubricating grease has favorable oxidation stability; and the lubricating grease has ultralow starting/operating torque, and can ensure the long service life of the lubricating grease and bearing at the ultralow temperature of -60 DEG C.

Description

technical field [0001] The invention belongs to the technical field of lubricating grease, in particular to an ultra-low temperature bearing lubricating grease composition and a preparation method. Background technique [0002] Grease is a lubricant in a semi-solid state. Thickener, base oil and additives together constitute the chemical formula of grease, which is an important factor that determines and affects the performance of grease along with the manufacturing process conditions of grease. According to different working conditions, suitable grease products can be prepared by targeted selection and adjustment of grease formula and manufacturing process. [0003] At present, more than 80% of rolling bearings are lubricated and protected with grease. With the continuous advancement of science and technology, the working conditions of modern bearings are more stringent and complex, and the requirements for lubricating grease are also constantly increasing, mainly reflecte...

Claims

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Application Information

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IPC IPC(8): C10M169/06C10M169/00C10M177/00C10N50/10C10N30/12C10N30/06
Inventor 童刘郑志磊谷红宽刘建龙
Owner CHINA PETROLEUM & CHEM CORP
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