A kind of gear type automobile steering gear lubricating grease composition

Abstract

The invention relates to a gear type automobile steering gear lubricating grease composition and a preparation method thereof. The composition comprises the following components by weight: 7.0-8.5 parts of 12-hydroxystearic acid; 0.99-1.20 parts of lithium hydroxide; 11.0-22.1 parts of cycloalkane base oil; 65-70 parts of synthetic hydrocarbon base oil; 0.5-1.0 part of an antioxidant; 0.1-0.3 part of a metal passivator; 1.0-2.0 parts of a friction reducing agent; 0.3-0.5 part of a liquid extreme pressure agent; 3.0-5.0 parts of a solid extreme pressure agent; and 0.4-0.6 part of an antirust agent. The lubricating grease composition provided by the invention is suitable for lubrication of gear type automobile steering gears, bearings and other components, has low starting torque and operating torque at a temperature ranging from -40DEG C to -50DEG C, is low in cost, has excellent friction reduction and anti-vibration performance, and can reduce the fatigue wear of the gear steering gear and prolong the service life of parts.

Description

Technical field [0001] The present invention relates to the technical field of lubricating greases, in particular to a grease composition suitable for working in an environment with an ambient temperature of -40°C to -50°C for automotive gear steering gears, bearings and other components. Background technique [0002] In the north of my country, the winter is very cold. Automotive gear steering and bearing grease have higher requirements for low temperature performance. The grease is required to have lower starting torque and operating torque to ensure good driving performance. [0003] Ordinary low temperature lubricating grease used in -30℃ environment generally uses lithium soap as thickening agent, synthetic hydrocarbon or cycloalkane as base oil, adding antioxidants and rust inhibitors, which can meet the requirements of ordinary equipment, but in cold areas When used in the extreme temperature of -40℃ to -50℃ in the field, it is difficult to meet the requirements of use: [00...

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Problems solved by technology

[0005] Ordinary low-temperature lubricating grease also has the following problems: In order to ensure smooth start at low temperature, the viscosity of the base oil used is small. When the temperature rises during normal operation, the viscosity of the base oil becomes smaller and the oil film becomes thinner. When the surface roughness of the friction surface is in the state of boundary lubrication or mixed lubrication, the temperature will continue to rise, resulting in increased wear of the equipment and affecting the service life; because it is not designed for gear lubrication, when there are gears running normally, vibrating Or impact will cause different degrees of abnormal wear or abrasion of the gear

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