RU2016128194A - DOUBLE VIBRATION ISOLATING SYSTEM ON THE BASIS OF EQUAL FREQUENCY SPRINGS - Google Patents

Claims (5)

1. A dual vibration-isolating system based on equal-frequency springs, 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 due to its precipitation δ:

, where P ₁ and P ₂ - respectively, the minimum and maximum loads at which the conditions of equal frequency are maintained; P is the 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 oscillations 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 support 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 base plate, and on the support the platform, by means of fasteners, a vibration-isolating object with a variable technological mass is fixed, and the platform is connected with support nodes mounted on the support plate of each vibration isolator using vertical and horizontal levers with axial-symmetrical adjustment bolts with equal-frequency springs rigidly connected to bushings covering the adjustment bolts nuts, and each of the support nodes contains vibration damping bushings, coaxially mounted with adjusting bolts, when The lower flange of the equal-frequency spring of each vibration isolator is mounted on an elastic base, which is connected to the lower platform of the vibration isolator by at least three struts with screws and with elastic coaxially located outside the struts, and under the elastic base of the lower flange of the equal-frequency spring, it is axisymmetric to it , a cylindrical-conical damper, for example from an elastomer, mounted with its cylindrical part on the lower platform of each vibration isolator, is placed, and the conical part is connected with the elastic By the development of an equal-frequency spring, the cylindrical-conical damper is made in the form of conically and cylindrical coil springs connected in series, the turns of which are coated with an elastomer layer, for example polyurethane, an elastic base on which the lower flange of the equal-frequency vibration isolator spring is fixed, is made combined, consisting of alternating layers of elastic material, for example, spring steel sheet, and layers of vibration damping material, for example, hard grades of vibration damping materials, such as an agate, antivibrate, shvim type rubber adhesive, characterized in that under the support platform on which the vibration-insulated object is fixed, a buffer device is installed, fixed on the common base of the vibration-isolation system, while the buffer device is not used in the normal mode of operation of the equipment due to the presence of a gap between it and the supporting platform. 2. A dual vibration-isolating system based on equal-frequency springs according to claim 1, characterized in that the buffer device is made in the form of a vertical cylinder with fasteners located perpendicular to the axis of the cylinder in its middle part, and one of the fasteners is a bolt with a washer, and another, opposite located and connected to the bolt - a threaded sleeve with a washer, which is a supporting element with an inclined arrangement of a vibration-insulated object, while an elastic element of elastomer, for example rubber or polyurethane, and at the bottom is a combined elastic element.