RU2018140604A - DOUBLE VIBRATION ISOLATING SYSTEM - Google Patents

Claims (4)

A dual vibration-isolating system containing a base, a support platform and an elastic element located between them, made in the form of a cylindrical equal-frequency spring with a variable pitch t, ensuring the constancy of the natural frequency of the system at any loads P from a given range: P ₁ ≤P≤P ₂ , for account of its precipitation δ:

, where P ₁ and P ₂ respectively the minimum and maximum loads under which the conditions of equal frequency are maintained; P is a load satisfying the condition P ₁ ≤P≤P ₂ ; δ ₁ - a given initial spring draft, corresponding to the minimum load P ₁ , and the condition of equal frequency: the frequency of the natural vibrations of the vibration-insulated system is constant when the mass of this system changes within the specified limits, the system contains at least two spring-frequency equal-frequency vibration isolators with equal-frequency springs symmetrically installed relative to the supporting platform, while the lower flange of the equal-frequency spring of each vibration isolator is mounted on an elastic base, and the upper one on the supporting plate, and on the supporting platform, by means of fasteners, a vibration-insulated object with a variable technological mass is fixed, and the platform is connected using vertical and horizontal levers with support assemblies fixed to the base plate of each vibration isolator using adjustment bolts axisymmetric with equal-frequency springs, rigidly connected to bushings that cover the adjustment bolts with nuts, and each of the support assemblies contains a vibrod damping bushings, coaxially mounted with adjusting bolts, while the lower flange of the equal-frequency spring of each vibration isolator is mounted on an elastic base, which is connected through at least three struts with screws and with elastic coaxially located outside the struts to the lower platform of the vibration isolator, and under the elastic base of the lower flange of the equal-frequency spring, axisymmetrically placed a cylindrical damper, for example, of an elastomer mounted with its cylindrical part on the lower platform of each vibration isolator, and the conical part is connected with the elastic base of the equal-frequency spring, the cylindrical damper is made in the form of series-connected conical and cylindrical coil springs , the turns of which are covered with a layer of elastomer, for example polyurethane, an elastic base on which the lower flange of the equal-frequency spring of the vibration isolator is fixed, is made combined, consisting of alternating layers of elastic mat series, for example, spring steel sheets, and layers of vibration damping material, for example, hard grades of vibration damping materials, such as plastic compound like Agate, Anti-Vibrate, Shvim, characterized in that within the equal-frequency springs, each axisymmetrically and coaxially placed, are placed elastic-damping devices, axisymmetrically and coaxially placed inside cylindrical equal-frequency springs, are made in the form of cylindrical coil springs, the turns of which are covered with a layer of elastomer, for example polyurethane, with less rigidity of the cylindrical equal-frequency springs, with their lower part mounted on an elastic base and the upper on the base plate of the vibration isolator.