Lubricating grease special for outer ball cage of automotive universal joint and preparation method for lubricating grease

Abstract

The invention discloses lubricating grease special for an outer ball cage of an automotive universal joint. The lubricating grease has excellent extreme pressure and antiwear performance, liquid impact erosion resistance and rust protection, and the applicable temperature range is -25 to 150 DEG C; and by matching of an effective extreme pressure additive and a molybdenum disulfide solid film lubricant, the product can also prevent parts from being worn under severe operating conditions and under the condition of impact loads. High-viscosity base oil ensures that the service life of the product is prolonged, so that the maintenance cost is reduced; the lubricating grease has extremely strong antioxidant capacity, so that the time of outage maintenance is reduced, and the service life of equipment is prolonged; the lubricating grease contains an effective solid extreme pressure additive molybdenum disulfide, and has high abrasion resistance; the lubricating grease cannot be diluted after being used for a long time; and sulfur-molybdenum powder is high-temperature-resistant and can only be decomposed at the temperature of 450 DEG C even if the base oil is fully oxidized and decomposed, so the lubricating grease has strong extreme pressure and antiwear performance.

Description

technical field [0001] The invention relates to dodecahydroxylithium soap-type lubricating grease added with solid lubricating materials and a preparation method thereof, in particular to a special lubricating grease for the outer spherical cage of an automobile universal joint and a preparation method thereof. Background technique [0002] The lauryl hydroxylithium soap type lubricating grease added with solid lubricating materials has excellent comprehensive properties and has attracted extensive attention and close attention. At present, the production process of this type of grease is relatively simple, the dispersion of solid additives is uneven, and the product performance is unstable. Temperature has a great influence on the fluidity of grease. As the temperature rises, the grease becomes softer, which reduces the adhesion of the grease and makes it easy to lose. In addition, under higher temperature conditions, the evaporation loss of lubricating grease is easy to i...

AI Technical Summary

Problems solved by technology

[0003] The better lubricating grease in the prior art is lithium-based grease, which has a higher dropping point and a service temperature range of -20 to 120°C. It has good water resistance, mechanical stability, rust resistance and oxidation stability. However, potassium-based grease has the disadvantage of poor anti-wear performance for a long time, and it is not suitable to be mixed with other greases, and it is easy to separate oil during storage. In the case of harsh operating conditions and impact loads, it is impossible to prevent the wear of parts, and it cannot effectively prevent the seizure and sintering of mechanical parts. The service life of the product is short, and it can no longer meet the increasingly stringent requirements of modern industry.