Heavy load bearing lubricating grease and preparation method thereof

Abstract

The invention discloses heavy load bearing lubricating grease which comprises the following raw materials in parts by weight: 8-10 parts of octadecylamine, 4-6 parts of MDI (diphenylmethane-4,4'-diisocyanate), 8-10 parts of macromolecule fatty acid, 6-8 parts of low molecular acid, 7-8 parts of lithium hydroxide, 20-25 parts of water, 60-80 parts of base oil A, 40-60 parts of base oil B, 0.2-0.5 parts of an antioxidant A, 0.6-0.8 parts of an antioxidant B, 0.2-0.4 parts of an antirust agent, 0.2-0.5 parts of an extreme pressure anti-wear agent A, 1-2 parts of an extreme pressure anti-wear agent B, 5-15 parts of a tackifier, 2-3 parts of a stabilizer and 6-8 parts of a structure improver. Except the heavy load bearing lubricating grease disclosed by the invention is excellent in high temperature resistance, lubricating property, adhesivity, pumpability, oxidation stability and heat stability, the heavy load bearing lubricating grease is more excellent in shear stability, colloid stability, water resistance and extreme pressure anti-wear property.

Description

technical field [0001] The invention relates to the field of lubricating grease, in particular to heavy-duty bearing lubricating grease and a preparation method thereof. Background technique [0002] Grease is the fifth part of the heavy-duty automobile hub bearing, and its performance directly affects the life of the hub bearing. The life of lubricating grease in heavy-duty automobile hub bearings is an extremely important performance. With the continuous development of economy and technology, "lifetime lubrication" has become the mainstream development trend of hub bearing lubrication, that is, the service life of grease is equal to or exceeds that of hub bearings. The service life of the bearing can reduce the failure rate of the hub bearing, reduce the production cost of the bearing, and improve the productivity. [0003] Heavy-duty automobile hub bearing grease is a semi-solid lubricant. To make the automobile hub bearing grease have a longer service life and better us...

AI Technical Summary

Problems solved by technology

[0005] For the lubrication requirements of heavy-duty vehicle hub bearings, some different types of greases have been developed at home and abroad, mainly lithium-composite greases and urea-based greases, and a variety of extreme pressure and anti-wear agents are used in conjunction with them, but there are Poor shear stability, large oil separation, poor water resistance and extreme pressure and anti-wear properties, etc. During market use, it is easy to lose when exposed to high temperature, oxidized and blackened, and thinned and lost after a period of use, bearing wear This phenomenon affects the service life of vehicle bearings and grease. At present, it is a technological development trend to develop heavy-duty bearing grease to meet the long-life grease of automobile hubs.

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