Grease specially used for heavy-load open-type gear and preparation method thereof

Abstract

The invention discloses grease specially used for a heavy-load open-type gear and a preparation method. The grease of the invention comprises the following raw materials by weight percentage: 1-2% of MDI (diphenylmethane-4,4'-diisocyanate), 0.2-1% of octadecylamine, 0.5-2% of cyclohexylamine, 35-50% of base oil A, 30-45% of base oil B, 0.5-1.0% of anti-oxidant A, 1.5-3.0% of anti-oxidant B, 0.5% of antirust agent, 0.5-1.5% of extreme pressure antiwear additive A, 4-8% of extreme pressure antiwear additive B, 2-5% of oiliness agent A, 0.1-0.3% of oiliness agent B, 10-15% of adhesive compound and 4-8% of solid lubricant. Various raw materials are stirred and mixed under certain sequence according to different temperature while preparing, the grease of the present invention has ultra-strong extreme pressure and antiwear property, and excellent adhesiveness, anticorrosion and antirust performance, good anti-oxidizability and water resistance performance and spray characteristic, and has good adaptability with routine seal elements. The grease has no heavy metal lead or a volatile solvent, and belongs to the energy saving and environment-friendly product.

Description

technical field [0001] The invention relates to the field of lubricating grease, in particular to lubricating grease specially used for heavy-duty open gears and a preparation method thereof. Background technique [0002] Heavy-duty open gears such as rotary kilns, ball mills in cement plants, coal mills in thermal power plants, large-scale mixers in paper mills, mines, calciners in machinery factories, etc. all use extra-large gears (rings) with a diameter of several meters. Transfer loads up to hundreds of tons. [0003] Due to the small radius of curvature of the tooth profile of the gear, the conditions for the formation of an oil film are poor. The gear lubrication process is a discontinuous process. The oil film needs to be re-established in each meshing process. There are both rolling friction and sliding friction between the tooth surfaces; there are both fluid lubrication and boundary lubrication in the gear meshing process. Fluid lubrication is mainly realized by...

AI Technical Summary

Problems solved by technology

[0006] These lubricating parts were previously lubricated with open gear oil, but the addition of a large amount of asphalt and other compounds in the production of open gear oil made production more difficult and blocked the pipeline seriously, resulting in increased production costs

During use, open gear oil tends to drip and leak as the temperature rises or the viscosity becomes smaller after a period of use, resulting in waste and polluting the environment; when starting at low temperature, the resistance is too high due to the high viscosity, which aggravates the wear of the gears and can Increased consumption, resulting in unnecessary losses

[0007] In the 1980s and 1990s, some developed countries in foreign countries began to use lubricating grease instead of open gear oil for lubrication, and achieved good results. Some domestic cement manufacturers are also using imported open gear lubricating grease for production and maintenance. Equipment maintenance brings better results, but the price is more expensive

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