RU2016129231A - SHELTERED DAMPER OF DRY FRICTION OF KOCHETOV - Google Patents

Claims (3)

1. A dry friction disk damper comprising a housing and a piston disposed therein, the housing is made in the form of a cylinder with a bottom, in which a piston is located, consisting of parallel to each other, and coaxial to the upper and lower disks, rigidly interconnected by an axisymmetric rod, and the disks are mounted relative to the inner surface of the casing with a gap, and between them there is a friction material selected depending on the required coefficient of friction, and a spring abuts against the lower surface of the lower disk located between the piston and the bottom of the damper body, the cavity between the piston and the bottom of the body in which the spring is located is filled with friction material with a higher coefficient of friction, for example, elements of a mesh structure, while the density of the elements of the mesh structure is in the optimal range of 1.2 g / cm ³ ... 2.0 g / cm ³ , moreover, the material of the wire of the elastic mesh elements is steel EI-708, and its diameter is in the optimal range of 0.09 mm ... 0.15 mm, characterized in that the upper surface is upper of the first piston disk of the damper abuts against the lower surface of the disk-shaped elastic element, which makes it possible to move them together, and the force closure of the elastic element with the damper is ensured by a spring located in the lower part of the piston, and a locking element is provided for fixing the piston in the damper body, made for example, in the form of a retaining ring fixed in a groove of the inner surface of the cylinder of the housing, while the retaining element is in contact with the upper surface of the upper pore disk while holding the piston in its initial state, the clearance of the piston disks rigidly interconnected by an axisymmetric rod, between which the friction material is located, is smaller than the size of the individual fractions of the friction material relative to the inner cylindrical surface of the housing. 2. The dry friction disk damper according to claim 1, characterized in that the upper surface of the upper damper piston disk abuts against the lower surface of the elastic element containing the frame, in which the disk-shaped elastic element is installed, the frame is made of lower and upper parts, while the lower part of the frame consists of a base made in the form of a disk with an annular internal groove in which the lower elastic ring of the plate-shaped elastic element is placed, and the upper part of the frame is made in the form of a cover representing a disk with a central annular recess, and rigidly connected by means of, for example, screws with an upper elastic ring of a disk-type elastic element, wherein the disk-type elastic element contains at least two flat elastic coaxially arranged rings, upper and lower, interconnected by at least three elastic flat plates arranged obliquely with respect to the axis of the rings, the upper ring being connected to the cap and a friction material ring attached to the lower part of the lower ring to create dry friction, which provides the necessary damping in the system, and flat elastic plates are located between the recesses, and a layer of vibration-damping material located in the central annular recess of the cover, on which the mounting plate for attaching the vibration-insulated object is fixed, is made in the form of three intermediate vibration-damping layers: the first layer - from a dispersed elastic-damping material in which crumbs can be used, for example, the following materials: rubber, cork, polystyrene foam, nylon, foamed polymer, as well as crumbs of hard vibration-damping materials, such as agate, anti-vibrate, shvim plastic with a size of fractions of crumbs of 1.5 ÷ 2.5 mm, the second layer is made of knitted elastic synthetic fibers, and the size cells knitted from elastic synthetic fibers are 10–15% smaller than the size of fractions of crumbs of vibration damping materials; and the third layer is made of a continuous damping material in which sponge rubber, needle-punched material of the type “Vibrosil” based on silica or alumino-borosilicate fiber, as well as non-woven vibration-damping material, and as a friction material of the ring attached to the lower part of the lower ring, can be used used friction material made of a composition comprising the following components, with their ratio, in wt. %: mixture of resol and novolac phenol formaldehyde pitches in the ratio 1: (0.2-1.0) 28 ÷ 34 fibrous mineral filler containing glass roving or a mixture of glass roving and basalt fiber in a ratio of 1: (0.1-1.0) 12 ÷ 19 graphite 7 ÷ 18 carbon black friction modifier in the form of a mixture with kaolin and silicon dioxide 7 ÷ 15 barite concentrate 20 ÷ 35 talc 1.5 ÷ 3.0