DISC OF THE FRICTIONAL COUPLING OF THE POINT DRIVE TYPE SP

摘要

The utility model relates to mechanical engineering, in particular to braking and friction devices. The friction disc of the switch drive clutch of the SP type contains a metal disc 2-3 mm thick with holes located around the circumference in the form of an equilateral triangle with rounded tops. The holes are directed towards the center of the disc at one angle. Friction inserts with a height of 3-6 mm are fixed in the holes by means of press upsetting. The inserts protrude 1-3 mm symmetrically above the disc planes on each side. The inserts are made of a material containing copper, silicon oxide, graphite, zinc steoric acid and iron, with the following ratio of components, wt%: copper 8.0-13.0 silicon oxide 2.0-8.0 graphite 2.0-5.0 zinc steoric acid 0.1-0.5 iron rest The material of the friction inserts has an open porosity of 15-30%, Brinell hardness HB 350-450 MPa, density 5.00-5.25 g / cm3, relative draft of at least 12% and oil absorption - 2 -five%. The result is a reduction in the running-in period of the friction discs and an increase in the stability of the switch operation when changing loading conditions. 2 c.p. f-ly, 3 dwg