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Ultralow-temperature mute bearing grease and preparation process thereof

A silent bearing and preparation technology, applied in the field of lubricating grease, can solve problems such as large viscosity changes of lubricating grease, many impurities, damage to machine motors and other components, and achieve low starting/running torque, excellent low temperature fluidity, and long oxidation. The effect of the induction period

Active Publication Date: 2020-09-25
金鹰润滑材料(金湖)有限公司
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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 motor and other components, thus affecting the normal use of the equipment
At present, there are some relatively good products on the market, mainly lithium-based grease prepared by using low-viscosity polyalphaolefin (PAO) as the base oil. There are many, and the requirements for post-production processing are relatively high, and the stability of product quality is difficult to guarantee

Method used

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  • Ultralow-temperature mute bearing grease and preparation process thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The raw material preparation that following embodiment relates to:

[0036] Get 420gPAO6 and 180gPAO4 and mix to form mixed oil, place the production intermediate tank for subsequent use;

[0037] Take lithium hydroxide 10g, mix after adding 80g water wherein, prepare lithium hydroxide solution;

[0038] Additives: 5g diphenylamine, 5g di-tert-butyl-p-cresol and 10g barium petroleum sulfonate;

[0039] Get 150g of PAO4 and PAO6 mixed oil, add 50g of nano-sized PTFE powder thereinto, and disperse evenly with high-speed ultrasonic to form a nano-sized PTFE solution;

[0040] Take 350g of PAO4 and PAO6 mixed oil into the reactor and heat up to 90°C, add 70g of lauryl hydroxystearic acid into the reactor, stir and dissolve evenly, and circulate the filter for 1h with a filter precision of 1μm, and the temperature of the reactor material is raised to At 95°C, add 90g of lithium hydroxide aqueous solution, continue to heat up to 205°C after saponification for 3 hours, add 1...

Embodiment 2

[0042] Raw material preparation: take 420gPAO6 and 180gPAO4 and mix to form a mixed oil, which is placed in the production intermediate tank for standby;

[0043] Take lithium hydroxide 10g, mix after adding 80g water wherein, prepare lithium hydroxide solution;

[0044] Additives: 10g diphenylamine and 10g barium petroleum sulfonate;

[0045] Get 100g of PAO4 and PAO6 mixed oil, add 50g of nano-sized PTFE powder to it, and disperse evenly with high-speed ultrasonic to form a nano-sized PTFE solution;

[0046]Take 300g of PAO4 and PAO6 mixed oil and add it to the reactor to raise the temperature to 90°C, add 70g of lauryl hydroxystearic acid to the reactor, stir and dissolve evenly, and circulate the filter for 1.5h, the filter precision is 2μm, and the temperature of the reactor material is raised When it reaches 100°C, add 90g of lithium hydroxide aqueous solution, continue to heat up to 210°C after saponification for 3 hours, add 100g of synthetic ester, stir for 5 minutes...

Embodiment 3

[0048] Raw material preparation: take 600gPAO6 and 400gPAO4 and mix to form a mixed oil, which is placed in the production intermediate tank for standby;

[0049] Take lithium hydroxide 12g, mix homogeneously after adding 80g water wherein, be prepared into lithium hydroxide solution;

[0050] Additives: 10g diphenylamine, 10g di-t-butyl-p-cresol and 10g barium petroleum sulfonate;

[0051] Get 150g of PAO4 and PAO6 mixed oil, add 100g of nano-sized PTFE powder to it, and disperse evenly with high-speed ultrasonic to form a nano-sized PTFE solution;

[0052] Take 400g of PAO4 and PAO6 mixed oil and add it to the reactor to raise the temperature to 100°C. Add 120g of dodecyl hydroxystearic acid to the reactor, stir and dissolve evenly, and circulate the filter for 1.5h with a filter precision of 2μm. When the temperature reaches 102°C, add 92g of lithium hydroxide aqueous solution, continue to heat up to 218°C after saponification for 3 hours, add 150g of synthetic ester, stir...

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Abstract

The invention discloses ultralow-temperature mute bearing grease, which is prepared from the following raw materials in parts by weight: 50 to 75 parts of PAO4 and PAO6 mixed oil, 7 to 12 parts of dodecahydroxyl stearic acid, 1.2 to 1.8 parts of lithium hydroxide, 5 to 15 parts of synthetic ester, 1 to 5 parts of an dditive and 1 to 10 parts of nanoscale PTFE powder. According to the invention, low-temperature starting of the bearing and normal-temperature bearing noise can reach a very high level, and the low-temperature starting of the bearing mainly reflects the starting condition and noisecondition of the bearing at a low temperature, such as -50 DEG C. The ester oil with low condensation point and high viscosity index and a nanoscale solid lubricant are added to improve the thickenerdistribution of the grease, enhance the oil film strength of the grease and lower the internal friction coefficient of the grease, thereby stabilizing the normal-temperature noise of the bearing andimproving the low-temperature start.

Description

technical field [0001] The invention relates to the technical field of lubricating grease, in particular to an ultra-low temperature silent bearing lubricating grease and a preparation process thereof. 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] With the continuous advancement of science and technology, the working conditions of modern bearings are more stringent and complex, and the requirements for grease are also constantly increasing, mainly reflected in long life, adaptability to high and low temperature, high and low speed use, low noise and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M169/00C10N30/08C10N40/02C10N30/06C10N30/10C10N30/12C10N30/04
CPCC10M169/00C10M2205/0206C10M2207/1285C10M2201/062C10M2213/062C10M2215/064C10M2219/044
Inventor 沈浩殷若恺
Owner 金鹰润滑材料(金湖)有限公司
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