Low-noise bearing lubricating grease and preparation method thereof

Abstract

The invention discloses low-noise bearing lubricating grease and a preparation method thereof. The preparation method comprises the following steps of: performing saponification reaction of hydroxyl fatty acid having 12 to 24 carbon atoms and lithium hydroxide in a ratio, dehydrating and drying the generated fatty acid lithium, and grinding into pre-prepared soap powder; preheating base oil which is formed by mixing naphthenic mineral oil and ester synthetic oil and accounts for 2 / 3 of the total quantity, adding pre-prepared lithium soap when the temperature is between 80 and 100 DEG C, heating for dispersing, heating to the temperature of between 200 and 210 DEG C, and bulking at the constant temperature for 20 to 30 minutes; adding the residual 1 / 3 base oil, cooling naturally to the temperature of between 160 and 165 DEG C, shearing circularly at the constant temperature for 30 minutes, cooling to the temperature of between 120 and 130 DEG C, and adding an additive; and homogenizing, degassing, filtering accurately, and packaging to obtain the lubricating grease. According to the low-noise bearing lubricating grease, the conventional method for saponifying directly to form the pre-prepared soap is changed, namely a fiber structure of the lubricating grease is controlled by circular temperature-control shearing, so that the noise reduction performance of the lubricating grease in bearings reaches the international advanced level on the premise of keeping the current performance.

Description

technical field [0001] The invention relates to a low-noise bearing lubricating grease and a preparation method thereof, belonging to the technical field of lubrication. Background technique [0002] As a bearing lubricant, grease has the advantages of simplifying the bearing device and miniaturizing the mechanical device. About 80% of rolling bearings are lubricated with grease. Modern manufacturing industries, especially motors in office automation equipment and household appliances, new military equipment, precision instruments, aerospace, aviation and marine machinery and equipment, all require low noise and low vibration ball bearings. Most of these bearings are Small diameter, sealed disposable deep groove rolling ball bearings. In almost all cases, these bearings are grease filled. [0003] In recent years, bearing technology has developed rapidly, especially with the advancement of materials and processing technology, the noise generated by the bearing itself has b...

AI Technical Summary

Problems solved by technology

[0005] Bearings, especially sealed bearings, require lubricating grease to have good anti-rust performance, good mechanical stability, good colloidal stability, less and small mechanical impurities, good wear resistance and long life, and low noise, because noise will It causes the temperature rise of the bearing and reduces the life of the bearing and grease. Generally, if the noise increases by 6 decibels, the life of the bearing will be reduced by half. The noise is also harmful to the health of the people working and living around the equipment.

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