Large-load running rail dry-film lubricant

Abstract

The invention discloses a large-load running rail dry-film lubricant, belonging to the single-constituent room-temperature solidification type dry-film lubricant, comprising the following constituents by weight parts: modified thermal plastic acrylic ester copolymer 30-40 parts, coupling agent 2-6 parts, nano Al2O3 0.5-4 parts, solid lubricant 55-70 parts, solvent 350-500 parts, additive 6-8 parts. The dry-film lubricant has features of good anti-friction and abrasion proofness; good extreme pressure property; no corrosion; safe use, construction and convey; accordance with environmental protection requirement; lower cost and wide application.

Description

technical field [0001] The invention relates to a lubricant, mainly a dry-film lubricant for a heavy-duty driving guide rail in a steel plant. Background technique [0002] The driving crane in the iron and steel plant is responsible for heavy lifting tasks. The working characteristics of the crane’s lifting rail and the wheels on it: ①Large load, such as the weight of a single roll of a cold and hot rolling mill in a steel rolling plant is as high as more than 50 tons. To ensure product quality, the roll It often needs to be lifted for maintenance or replacement; ②starting and braking are frequent; ③working conditions are harsh (some work in the open air). Therefore, the crane guide rail should be lubricated regularly according to the design requirements in use to reduce wear and prolong service life. [0003] In the past, grease lubrication was often used. Due to the small bearing capacity of the oil film (generally not greater than 1100N), the oil film is easy to be sque...

AI Technical Summary

Problems solved by technology

Under the wheel pressure, it can form a lot of pressure, causing the oil wedge effect, making the crack expand, and accelerating the destruction of the guide rail; moreover, the grease is easy to fall, which not only pollutes the environment, but if it falls on the steel plate, black spots will appear and affect the guide rail. The quality of the steel plate; if it falls into the cooling water or emulsion used in the hot rolling process, it will increase the difficulty of cooling water and emulsion treatment

[0004] Chinese patents CN97125641, CN00104432 and CN03140835 disclose dry film lubricants, which use a bonding component of moisture-curable polyurethane (PU), which can be solidified and formed into a film only when the humidity is greater than 65%. Restrictions, the solvents used are flammable and explosive solvents (such as acetone, xylene, cyclohexanone, etc.), which bring safety problems to construction and transportation

[0005] Chinese patent CN95103904 announces the normal temperature curing antirust dry film lubricant, and its used adhesive composition is polyamide-imide resin (PAI), although heat resistance is good, tribological performance is excellent, but PAI water absorption (4~6 %) high, poor hydrolysis performance, which affects its service life, and can only exert its excellent effect after film formation and curing. The solvent used is a mixed solvent of dimethylformamide and methyl ethyl ketone, which is flammable and explosive, and will also bring come security questions

[0006] The rail side dry film lubricant disclosed in Chinese patent CN200510057340 uses a traditional thermoplastic acrylate copolymer as an adhesive component, which has a low glass transition temperature (25-70°C) and is greatly affected by temperature. Poor, the hardness of the film is small, it is easy to deform and fall off, the bearing capacity is small, and the wear resistance is poor

The diluents used at the same time (such as acetone, xylene, cyclohexanone, etc.) are flammable and explosive

[0009] From the above related patents, although they have their own characteristics, they cannot fully meet the requirements of large-scale equipment, difficult high-temperature curing and other special working conditions.

Images