FIELD: machine building.
SUBSTANCE: sleeve is made from composite polymer antifriction polyamide-based material containing a mixture of carbon fibre and glass fibre, as well as a powder filler as a fibrous filler. As a material base, it contains polycaproamide or mixture of polycaproamide with 20-40 wt % of polyethylene caproamide. As carbon fibre, the material contains carbon fibre obtained from high-molecular hydrocellulose fibre; content of glass fibre in the mixture is 3.48 to 10.5 wt %. As powder filler, the material contains colloid-graphite solution with particle sizes of 400 to 4000 nm, or silicon oxide in the form of marshalite or colloidal silica with particle sizes of 400 to 8000 nm. Sleeve material contains components in the following ratio, wt %: mixture of carbon fibre and glass fibre 28.5-43.0; powder filler 1.4-3.2; mineral oil 1.0-2.0; polymer matrix is the rest (up to 100%).
EFFECT: increasing sleeve service life due to considerable reduction of intensity of linear wear of a working layer of sliding at friction on polished steel pair from steel 40X, increasing stability of friction coefficient at friction on the material of counter body steel 40X, and improving Charpy impact strength on specimens without any notch at simultaneous maintenance of low friction coefficient and the specified limit of compressive strength.
6 cl, 2 tbl
