Preparation method of low-noise grease lubricant for miniature bearing with high precision and density

Abstract

The invention discloses a preparation method of a low-noise grease lubricant for a miniature bearing with high precision and density. The preparation method comprises the following steps of: carrying out ultrafiltration on raw materials and adding all raw materials into a saponification kettle to carry out saponification; and after saponifying, carrying out filtering, high-pressure homogenizing and high-reflux shearing pressure in sequence. The preparation method has the advantages of simpler production process, fewer procedures, lower production cost and improved production efficiency; meanwhile, the grain diameter of mechanical impurities in the grease lubricant is smaller than that of the grease lubricant in the prior art and the vibration decibel value of the bearing is lower than that of the grease lubricant in the prior art, so that the operation precision of the miniature bearing is guaranteed, and the vibration and abrasion are reduced; the vibration decibel value of the bearing is lower than 40, the grain diameter of mechanical impurities in the grease lubricant is smaller than 10 microns, and the work penetration of the grease lubricant is 310-340, 0.1 mm.

Description

[0001] 1. A method for preparing low-noise grease for high-precision miniature bearings, characterized in that it comprises the following steps: [0002] a. Mix dodecylhydroxystearic acid and base oil lubricating oil in a ratio of 1:4-6 and heat it at 80-120°C and then add it to the saponification kettle after processing through filtration with a particle size of less than 5 microns; the base oil lubrication The oil is one or a mixture of petroleum-based base oil and poly-α-olefin synthetic oil; wherein the petroleum-based base oil is one or more of highly refined paraffin-based, naphthenic and intermediate-based lubricants The kinematic viscosity at 100℃ is between 8-40 centistokes, and the open flash point is between 180-300℃; the kinematic viscosity of poly-α-olefin synthetic oil at 40℃ is between 80-300 centistokes, The point is between -80-0℃; [0003] b. The lithium hydroxide aqueous solution with a concentration of 5-10% is filtered by vacuum filtration with a particle size ...

AI Technical Summary

Problems solved by technology

In the prior art, the grease production process for high-precision and low-noise miniature bearings is relatively complicated, the production cost is high, and the product performance is unstable. The vibration decibel value of the bearing exceeds 50 decibels, and the maximum particle size of mechanical impurities in the grease The diameter exceeds 10 μm, which affects the motion accuracy of the miniature bearings, and at the same time increases wear and vibration, resulting in greater operating noise