A kind of low-noise lubricating grease and preparation method thereof

Abstract

The invention relates to low-noise lubricating grease and a preparing method thereof. The low-noise lubricating grease is prepared from, by weight, 25-50 parts of lithium base lubricating grease, 50-75 parts of polyurea lubricating grease, 6-10 parts of second dispersant and 0.3-1.0 part of antioxidant; the preparing method comprises the steps of preparation of the polyurea lubricating grease, preparation of the lithium base lubricating grease and mixing. According to the low-noise lubricating grease, a mixture of the lithium soap lubricating grease and the polyurea lubricating grease is used as a raw material, then the second dispersant and the antioxidant are added into the mixture, and the high-temperature mixing technology is adopted to prepare the low-noise lubricating grease with even components; the low-noise lubricating grease has great low-noise performance and can effectively cover up abnormal noise generated by vibration of bearings, and a stable bearing vibration value can be obtained within 1-2 seconds; meanwhile the low-noise lubricating grease has good mechanical stable performance and long lubricating life, and the maximum service temperature can reach 150 DEG C.

Description

technical field [0001] The invention relates to the technical field of lubrication, in particular to a low-noise lubricating grease and a preparation method thereof. Background technique [0002] In recent years, with the development of the bearing industry, the continuous updating of bearing noise standard testing instruments and the continuous improvement of testing methods, people have higher and higher requirements for low-noise grease. With the advancement of low-noise grease technology, polyurea low-noise grease has gradually replaced lithium-based grease in the market due to its better high-temperature performance and life. Noise performance will deteriorate after prolonged use. However, the noise stability of lithium-based grease at high temperature is very good, but it is not resistant to high temperature. [0003] Ordinary mixed grease usually uses more than two kinds of grease products, which are mixed and prepared by three-roller grinding at room temperature. T...

AI Technical Summary

Problems solved by technology

With the advancement of low-noise grease technology, polyurea low-noise grease has gradually replaced lithium-based grease in the market due to its better high-temperature performance and life. Noise performance will deteriorate after prolonged use

The noise stability of lithium-based grease at high temperature is very good, but it is not resistant to high temperature

[0003] Ordinary mixed grease usually uses more than two kinds of grease products, which are mixed and prepared by three-roller grinding at room temperature. The operating temperature of this "cold mixing" method does not exceed 60°C, which can easily cause different thickening. The dispersion of the agent components is uneven, resulting in a long time for the grease to reach a stable vibration value, poor ability to cover abnormal noise and other problems of unstable noise performance.

Moreover, repeated grinding and other treatment methods will also lead to poor mechanical stability of the grease, complex production process, and inconvenient manipulation, etc.