Ageing-proof molybdenum disulfide dry film lubricant used for self-locking nuts, and preparation method thereof

Abstract

The invention discloses an ageing-proof molybdenum disulfide dry film lubricant used for self-locking nuts. The dry film lubricant is prepared from, by weight, 89-90 parts of 601 epoxy resin, 29-31 parts of 618 epoxy resin, 10-11 parts of chloroprene rubber, 27-29 parts of molybdenum disulfide, 3.1-3.4 parts of methylhexahydrophthalic anhydride, 4.1-4.6 parts of nanometer silicon carbide, 5-7 parts of fluorinated rare earth, 0.1-0.2 parts of alum, 2-4 parts of aluminum silicate fibers, 0.2-0.4 parts of ethyltrimethoxysilane, 3-4 parts of triacetin, 0.1-0.2 parts of an antioxidant TPPD and 56-59 parts of a mixed solvent. Compared with routine grease lubricants, the dry film lubricant prepared in the invention has antirust, ageing proofing, lubrication and cleaning effects, keeps the self-locking nuts in a good working state for a long time, and prolongs the service life of the self-locking nuts.

Description

technical field [0001] The invention relates to the technical field of lubricant preparation, in particular to a molybdenum disulfide dry film lubricant for anti-aging self-locking nuts and a preparation method thereof. Background technique [0002] In addition to the fastening function of ordinary nuts, self-locking nuts also have locking properties. Their working principle is generally self-locking by friction, which can prevent the fastening components from loosening and falling off during use. It is widely used in aviation and aerospace. Fastening of mechanical moving parts such as aircraft. Fretting wear is common in the industrial field and is called the "cancer" in the industry. During assembly or use, self-locking nuts are not only prone to fretting wear and tear due to various vibration environments, but also due to repeated screwing. Screwing in and screwing out often rubs and sticks with the base metal, which leads to the failure of the locking performance of the...

AI Technical Summary

Problems solved by technology

[0004] However, the outstanding shortcoming of the molybdenum disulfide dry film currently used is that it is easily oxidized in the atmosphere (especially in a humid atmosphere) and the lubrication failure occurs

Molybdenum disulfide decomposes into Mo and S at 1100°C in vacuum; in air, when the temperature exceeds 400°C, obvious oxidation occurs and molybdenum trioxide is formed, which affects its lubricity and adhesion to metal surfaces , so molybdenum disulfide can be used up to 350°C in the air, and the friction and wear will increase when the temperature is higher. Therefore, it is necessary to improve the moisture resistance and high temperature resistance of the dry film. In addition, the dry film lubricant prepared in the literature uses The poor temperature resistance of the epoxy resin adhesive is also one of the reasons for the relatively poor temperature resistance of the dry film lubricant, and the structure and function of the dry film lubricant in this paper are relatively single, only have a lubricating effect, coating There is no anti-rust effect on the surface of the self-locking nut, and the bearing capacity is low, the corrosion resistance is poor, and it is not easy to remove