RU2020130940A - VIBRATION PROTECTION SYSTEM - Google Patents

Claims (3)

Vibration protection system containing a vibration-isolated object installed on the upper air spring, connected by a pipeline to the lower air spring, while the upper air spring is fixed on the additional mass, and the lower one - on the movable base, opposite to the elastic element connecting the additional mass and the movable base, while the lower air spring, from the side opposite to its connection with the pipeline, it is connected to a guide device, which is movably connected to an additional mass on which the upper air spring is fixed, characterized in that the axially movable base is installed on elastic elements rigidly connected to the platform and made in the form a combined spring with a built-in torsional vibration damper, containing a cylindrical helical spring, on the coils of which support rings are made, consisting of two parts with oppositely directed ends, one part of which has coils of rectangular section, and the other part is dinners are hollow, while the opposite end of the first part is placed in the cavity of the second, the gaps of the segment profile of the contacting parts of the spring are filled with anti-friction lubricant, while at the end of the second part of the spring there is a sealing collar to prevent lubricant leakage, and the first part of the helical spring, made with coils rectangular section with rounded edges, covers a tube of damping material, such as polyurethane, gaps, in the first part of the helical spring, made with coils of rectangular section, which is covered by a tube of damping material, are filled with crumbs of sintered friction material based on copper, made from a composition, including the following components, at their ratio, in wt.%: zinc 6.0-8.0 iron 0.1-0.2 lead 2.0-4.0 graphite 3.0-7.0 vermiculite 8.0-12.0 chromium 4.0-6.0 antimony 0.05-0.1 silicon 2.0-3.0 copper rest, at the same time, a torsional vibration damper is axially symmetrically fixed to its lower support ring, made in the form of a “screw-nut” friction pair with a non-self-locking thread, while the screw is fixed in the upper round base of the damper, and the nut in the lower round base by means of a hinge element, while the upper and the lower bases of the damper are connected to a cylindrical elastic ring, in which the friction pair "screw - nut" is located, while the side surface of the nut is pivotally connected to the inner surface of the cylindrical elastic ring by means of at least three hinged rods, while the cylindrical elastic ring is made with a corrugation located along the horizontal axis of symmetry of the ring, while its cavity is filled with vibration damping material, polyurethane.