A kind of long-life high-temperature lubricating grease and preparation method thereof

Abstract

The invention provides a long-life high-temperature lubricating grease. The mass ratio of each raw material component is: 80-82 parts of base oil, 2.6-2.9 parts of lithium hydroxide, 10-13 parts of acid for saponification, 2.1-2.3 parts of antioxidant, 2.0-2.5 parts of extreme pressure anti-wear agent, 0.5-0.8 parts of anti-rust agent, 0.1-0.5 parts of polyimide, 8-10 parts of water; the invention also provides a preparation method of the above lubricating grease. The high-temperature lubricating grease prepared by the present invention is used for bearings. At 149°C and 1000r / min, the lubrication life is 1600-1700h, and the working penetration is 285-290; the extended working penetration (105 times) is 0.1mm, and the rate of change 3‑5%; dropping point reaches 303‑308 °C, strong extreme pressure and anti-wear properties, strong oxidation resistance, small steel mesh oil separation, small bearing leakage, small water loss, and small evaporation.

Description

technical field [0001] The invention belongs to the technical field of organic synthesis, and in particular relates to a long-life high-temperature lubricating grease and a preparation method thereof. Background technique [0002] As a commonly used lubricating medium, grease has better stability and anti-oxidation properties than thin oil lubricants, and is suitable for sports machinery with high motion precision, high load-bearing capacity requirements, high speed and long oil change intervals. ;High-temperature grease has excellent comprehensive performance, so it has strong general-purpose performance. It has been widely used in friction of various large-scale heavy-duty trucks, high-speed cars, large-scale electric motors, rubber, cement industries, etc. parts, but the existing high temperature grease still has the following deficiencies: [0003] (1) The lubrication life is short, and the rate of change of cone penetration is large when the work is extended; [0004]...

AI Technical Summary

Problems solved by technology

[0003] (1) The lubrication life is short, and the rate of change of cone penetration is large when the work is extended;

[0004] (2) The dropping point cannot be further improved, and it is difficult to adapt to higher operating temperatures;

[0005] (3) Poor extreme pressure and wear resistance;

[0006] (4) General anti-oxidation performance;

[0007] (5) Steel mesh oil separation, bearing leakage, water leakage and evaporation are all relatively large

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