RU2016128164A - DRY FRICTION DAMPER - Google Patents

Claims (7)

1. A dry friction damper comprising a housing and a piston located therein, the housing is made in the form of a cylinder with a bottom, in which a piston is located, consisting of parallel disks, and coaxial to the upper and lower disks, rigidly interconnected by an axisymmetric rod, the disks 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 located against the lower surface of the lower disk 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, while the upper surface of the upper disk damper piston pushes into the lower surface of an elastic element, for example, of a plate type, which allows their mutual movement, and the force closure of the elastic element with a damper is ensured by a spring located in the lower part of the piston, and for fixing the piston in the damper body there is a locking element made, for example, in in the form of a retaining ring fixed in the 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 piston disk, holding a piston in the initial state, characterized in that the clearance of the piston disks rigidly interconnected by an axisymmetric rod, between which the friction material is located, relative to the inner cylindrical surface of the housing is smaller than the size of the individual fractions of the friction material. 2. Dry friction damper according to claim 1, characterized in that as a friction material a composition is used comprising the following components, in 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 as a mixture with kaolin and silicon dioxide 7 ÷ 15 barite concentrate 20 ÷ 35 talc 1.5 ÷ 3.0 3. The dry friction damper according to claim 1, characterized in that the elastic element, the lower surface of which rests on the upper surface of the upper piston disk, is made in the form of a truncated cone of polyurethane. 4. The dry friction damper according to claim 1, characterized in that the spring located in the lower part of the piston is made in the form of a helical coil spring, the turns of which are coated with vibration damping material, for example polyurethane. 5. The dry friction damper according to claim 1, characterized in that the spring located in the lower part of the piston is made of a disk type and contains at least two flat elastic coaxially arranged rings, upper and lower, interconnected by at least at least three elastic flat plates located obliquely with respect to the axis of the rings, and the plates connecting the upper and lower rings can be made in the form of elastic rods of round or square profile. 6. The dry friction damper according to claim 1, characterized in that a vibration damping plate in contact with the lower surface of the lower piston disk is attached to the upper spring ring located in the cavity between the piston and the bottom of the housing.