FIELD: transportation.
SUBSTANCE: sleeve of the rail transport brake lever system is made of the composite polymer antifriction material based on the moulded thermoplastic polyphenylene sulfide, containing the carbon fiber as the fiberfill, and also randomly arranged the carbon nanotubes in the form of the single-layer or multilayer with the number of layers from 2 to 70, or interleaved and folded in the graphite planes tube with the number of layers from 2 to 70. The outer diameter of the carbon nanotubes is selected from 0.5 to 100 nm, and their length is from 0.5 to 77 microns. As the moulded polyphenylene sulfide of composite polymer antifriction material base the polyphenylene sulfide Fortron or Tecatron is used, at the following quantitative content, wt %: carbon fiber - 9.2-42.8; carbon nanotubes - 0.02-0.74; polyphenylene sulfide - the rest up to 100%.
EFFECT: increase the sleeve of the rail transport brake lever system service life due to significant reduction of the sliding working layer linear wear intensity during the friction on polished steel pair from steel 40X, reduction of the friction coefficient, keeping the friction coefficient stability level, when sliding along the material of counterbody from steel 40X, keeping the breaking stress at tension on the predetermined level, keeping the Charpy fracture toughness at the samples without notches, while keeping the predetermined limit of compression strength at the same time.
4 cl, 2 tbl
