A high torque coefficient wind power bolt lubricant

Abstract

The present invention is a high torque coefficient wind power bolt lubricant, including solid components and liquid components, calculated as 100 parts by total weight, 43 parts of solid material, 57 parts of liquid; wherein, among the solid materials, the fineness is 325 mesh flakes 3.5~4.5 parts of aluminum powder; 31~33 parts of heavy calcium carbonate with an average particle size of 1.0~1.8 μm; 20~22 parts of nano-active calcium carbonate; 0.2~0.5 parts of fumed silica; 40~42.5 parts of naphthenic oil in liquid parts, 0.5~3 parts of polyisobutylene. The high torque coefficient lubricant of the present invention can not only make large-sized high-strength wind power bolts have a relatively high and stable torque coefficient, but also play a role in proper loosening, and can be easily applied at a low temperature of -15°C. Brush; it can also play a certain anti-corrosion and protective effect on the bolts.

Description

technical field [0001] The invention relates to a lubricant for compound bolt assembly, in particular to a lubricant for bolt assembly with a stable and high torque coefficient. The lubricant is used for accurate assembly of large-size high-strength bolts in the field of wind power. Background technique [0002] With the increase of my country's wind power installed capacity and the emergence of some faults in recent years, people have begun to pay more and more attention to factors that have an important impact on the safety and reliability of wind power equipment, such as the accurate assembly of bolts. Wind power towers, hubs, and bearings usually need to be connected with large-size, high-strength bolts above M36. At each connection, there are usually dozens to hundreds of bolts arranged in a circle. Whether these bolts can be tightened accurately according to the designed axial force, and whether the force between the bolts is uniform, is of great importance to ensure...

AI Technical Summary

Problems solved by technology

In the first coating method, although the thread friction coefficient is controlled, the difference in surface condition and friction coefficient at the bearing surface cannot be controlled, and the friction coefficient at the bearing surface has a great influence on the total friction coefficient, resulting in The torque coefficient is very unstable and the standard deviation is large

Usually, the torque coefficient obtained when both the thread and the bearing surface are coated with molybdenum disulfide lubricants or other graphite-based and metal-based lubricants on the market is low, less than 0.11, so that the anti-loosening of bolts and the reduction of assembly The systematic error has a detrimental effect on the axial force

In addition, the temperature during assembly in the northern wind field will be lower than -10°C in winter, and many lubricants will solidify at this low temperature, making it difficult to paint

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