RU2018118460A - TWO-STAGE CONICAL VIBRATION INSULATOR - Google Patents

Claims (4)

1. A two-stage conical vibration isolator made in the form of a two-stage frame, consisting of sequentially connected and identical frames: the upper and lower frames, with the upper and lower elastic damping elements respectively aligned therewith, characterized in that the upper and lower frames are made in the form of coaxially arranged , hard shells of a truncated cone: upper and lower, while the upper base of each of the shells is a hard disk connected to them, each of which rests on top with their ends, respectively, the upper and lower elastic-damping elements, and the lower base of each of the shells of the truncated cone is made open, and designed to install at least two inclined elastic elements, as well as at least two vertical elastic elements connected to the base, the inclined elastic elements are located in the peripheral part of the shells of the truncated cone, and the vertical elastic elements are connected with their upper ends to the lower end part of the lower shell of the truncated cone sa and lower ends - with a base, wherein the resilient elements are mounted in planes displaced by 90 °, and the elastic members obliquely disposed upper frame and the vertical elastic elements of the lower frame are formed as coil springs. 2. A two-stage conical vibration isolator according to claim 1, characterized in that the upper elastic damping element is made in the form of a dry friction vibration isolator containing an elastic element, a housing and a dry friction damper, the housing is made in the form of two opposite and opposite cylindrical coil springs of the upper and lower bushings, fixing the spring with its outer surface, and the dry friction damper is made in the form of at least three elastic petals, rigidly connected to the lower sleeve, and covering with a certain or the outer surface of the spring, comprising a spring housing made of a helical, hollow, and elastic steel tube, inside of which at least one additional elastic steel tube is coaxially and axisymmetrically installed with a gap, and at least one is located in the gaps between the tubes friction element, while the surfaces of the spring housing and the additional elastic steel tube are in contact with the surfaces of the friction elements, and their axis coincides with the axis of the turns of the housing, and centrally, coaxially and axially symmetrically to the casing, a screw elastic rod is arranged, made solid, in the form of a coil spring with a step less by 5 ÷ 10% of the pitch of the casing helical line to create an interference fit for the functional purpose of the friction elements, and the friction elements are made tubular, and inside the petals of the vibration isolator are coated with a layer sintered friction material made on the basis of copper, containing zinc, iron, lead, graphite, vermiculite, copper, chromium, antimony and silicon, in the following ratio, 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; chrome 4.0 ÷ 6.0; antimony 0.05 ÷ 0.1; silicon 2.0 ÷ 3.0; copper - the rest, and the friction element located in the gaps between the tubes is made of friction material, including the following components, with their ratio, in wt. %: a mixture of rezol and novolac phenol-formaldehyde resins in the ratio 1: (0.2-1.0) - 8 ÷ 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%; a friction modifier containing carbon black in the form of a mixture with kaolin and silicon dioxide - 7 ÷ 15%; barite concentrate - 20 ÷ 35%; talc - 1.5 ÷ 3.0%. 3. A two-stage conical vibration isolator according to claim 1, characterized in that the lower elastic-damping element is made in the form of a cylindrical spring, which consists of two parts with opposite ends, one part of which has turns of rectangular cross section, and the other part of the spring is hollow, this counter-directed 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 antifriction grease, while at the end of the second part of the spring seals are installed cuff to prevent lubricant leakage, and the first part of the coil spring, made with coils of rectangular cross section with rounded edges, covers a tube of damping material, such as polyurethane, gaps, in the first part of a coil spring, made with coils of rectangular cross section, which covers the tube of damping material filled with crumbs of friction material, gaps in the first part of the coil spring, made with coils of rectangular cross section, which is covered by a tube of damping m material, filled with crumbs of friction material made from 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%