Long-life bearing lubricating grease and preparation method thereof

Abstract

The invention discloses a long-life bearing lubricating grease, which comprises the following substances by weight: 45-50 parts of isocyanate; 9-11 parts of aniline; 25-27 parts of cyclohexylamine; 8-10 parts of a viscosity index improver; 2-5 parts of a detergent; 1-3 parts of an antirust agent; 1-3 parts of an oxidation and corrosion inhibitor; 0.5-2 parts of an efficient corrosion inhibitor; 1-3 parts of an extreme pressure antiwear agent; and 105-130 parts of high viscosity naphthenic oil. The preparation method of the long-life bearing lubricating grease comprises the steps of: (1) charging a saponification kettle with high viscosity naphthenic oil and performing heating; (2) adding isocyanate into an oil storage tank and performing stirring till thawing; (3) adding aniline, cyclohexylamine and isocyanate into the saponification kettle in proportion, performing heating, adding some diluent oil and conducting heating to 165DEG C, then transferring the product into a blending kettleand conducting cyclic shearing, and then adding additives; and (4) determining the oil quantity, and conducting homogenizing and degassing. The preparation method provided by the invention can substantially improve the service life of bearing lubricating grease, and the bearing lubricating grease can solve the problems of serious bearing wear and large noise, and achieve effective protection of bearings.

Description

technical field [0001] The invention relates to the technical field of lubricating oil, in particular to a long-life bearing lubricating grease and a preparation method thereof. Background technique [0002] Bearing grease is a lubricating oil formulated from low-viscosity synthetic lubricating oil and added with various additives such as anti-oxidation and anti-corrosion. It is suitable for lubricating high-temperature and heavy-duty bearings operating under harsh conditions, especially for sealed or semi-sealed bearings Lifelong lubrication; especially suitable for occasions that emphasize long-term uninterrupted operation and extended grease cycle; fully synthetic grease guarantees long service life of grease and various bearings, gears, shaft pins, slideways and other components lubricated; applicable It is suitable for high temperature, heavy load, humid and corrosive occasions in mining, iron and steel industry, paper making and wood industry. [0003] At present, gen...

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Problems solved by technology

[0003] At present, the general bearing grease is made from lithium soap thickened with mineral base oil and added with anti-wear, anti-oxidation and other additives. In this case, the bearing grease prepared according to the current technology cannot meet the requirements of high-speed bearings under high and low temperature conditions. In addition, the problems of high noise and serious wear cannot be alleviated, the water resistance, rust and corrosion resistance are average, and the bearing life is not good.