Lubricating grease for railway locomotive wheel rim and preparation method thereof

Abstract

The invention discloses lubricating grease for rims of locomotives and a method for preparing the lubricating grease. The lubricating grease comprises base oil, high-alkali-value synthetic sulfonate, alkyl benzene sulfonic acid, 12-hydroxy stearic acid, antioxidants and the like. The method includes mixing the high-alkali-value synthetic sulfonate, the alkyl benzene sulfonic acid, water and a part of the base oil with one another to obtain mixtures, heating the mixtures and then adding isopropyl alcohol and inorganic acid into the mixtures to obtain gel; adding calcium hydroxide emulsion and boric acid solution into the gel, carrying out reaction to obtain reaction products and dehydrating the reaction products; adding another part of the base oil and the 12-hydroxy stearic acid into the reaction products and carrying out reaction; adding the remaining base oil and the antioxidants into the reaction products to obtain the lubricating grease. The lubricating grease and the method have the advantages that the lubricating grease is excellent in high-temperature resistance, low-temperature resistance, low-temperature pumpability, fog forming property, extreme-pressure abrasion resistance, water resistance, adhesion and antirust property; the required content of the high-alkali-value synthetic sulfonate required for preparing the lubricating grease by the aid of the method is reduced by approximately 5% as compared with existing lubricating grease, with the consistency identical to the consistency of the lubricating grease, prepared by the aid of an existing method, and the low-temperature flowability and the fog forming performance of the lubricating grease can be greatly improved.

Description

technical field [0001] The invention belongs to the field of lubricating grease, in particular to a lubricating grease for railway locomotive rims and a preparation method thereof. Background technique [0002] When the train is running, because the train is tilted during operation, the wheel rim is in contact with the inner side of the rail, resulting in frequent friction. Especially when the train is running on a curved road section, due to centrifugal force, the wheels are squeezed to the rails, causing severe friction between the inner surface of the rails and the wheel rims and severe wear, shortening the service life of the rails and wheels. Lubricating rails and wheels with wheel rim lubricants is the most effective way to reduce friction between wheel rims and rails, reduce locomotive power loss, improve wheel-rail interaction and reduce wheel-rail wear. [0003] According to the characteristics of the wheel flange lubrication, the wheel flange grease should have th...

AI Technical Summary

Problems solved by technology

There are few domestic reports on lubricating grease for railway locomotive wheels. Most of them are made of mineral oil as base oil, fatty acid mixed lithium soap as thickener and various additives. The low temperature performance cannot meet the requirements, and it has no reliable Biodegradable, polluting the environment

The patent number is CN103013627, the invention titled "a biodegradable lubricating grease for locomotive rims and its preparation method", discloses the use of lithium soap or calcium soap to thicken ester oil and vegetable oil, and adds a variety of additives, not only The high temperature resistance and oxidation resistance are poor, and the selected extreme pressure antiwear agent is not easy to degrade, which will still cause pollution to the environment. At present, domestic products of this kind mainly rely on imports, and the price is relatively high.

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