RU2015118863A - VIBRATING SYSTEM FOR TECHNOLOGICAL EQUIPMENT WITH VARIABLE WEIGHT - Google Patents

Abstract

1. Vibration isolating system for technological equipment with variable weight, containing a base, a support platform and an elastic element located between them, made in the form of a cylindrical equal-frequency spring having a variable pitch t, ensuring the constancy of the natural frequency of the system at any loads P from a given range: P≤ P≤P, due to its precipitation δ, where P and P- the minimum and maximum loads, respectively, under which the conditions of equal frequency are maintained; P is a load satisfying the condition P≤P≤P; δ is the specified initial spring draft corresponding to the minimum load P, and the condition of equal frequency: constant frequency of natural vibrations of the vibration-insulated system when the mass of this system changes within specified limits, characterized in that the system contains, at least two spring equal-frequency vibration isolators with equal-frequency springs symmetrically mounted relative to the support platform, while the lower flange of the equal-frequency spring of each vibration isolator is fixed to a different base, and the upper one on the base 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 with the support nodes using vertical and horizontal levers fixed to the base plate of each vibration isolator using axisymmetric with equal-frequency springs adjusting bolts rigidly connected to bushings, covering adjusting bolts with nuts, and each of the support nodes contains vibration damping bushings Ki coaxially mounted with adjusting bolts, while

Claims (2)

1. Vibration isolating system for technological equipment with variable weight, containing a base, a support platform and an elastic element located between them, made in the form of a cylindrical equal-frequency spring having 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 $$\delta ={\delta }_{\mathrm{one}}\left(\ln \frac{P}{P_{\mathrm{one}}}+\mathrm{one}\right)$$

where P ₁ and P ₂ are the minimum and maximum loads, respectively, under 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: a constant frequency of natural vibrations of the vibration-insulated system when the mass of this system changes within specified limits, characterized in that the system contains at least two spring-frequency vibration isolators with equal frequency springs symmetrically mounted 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 on the support the 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 with supporting nodes mounted on the supporting plate of each vibration isolator using vertical and horizontal levers with axially symmetric adjustment bolts rigidly connected to the bushings nuts covering the adjusting bolts, and each of the support nodes contains vibration damping bushings, coaxially mounted adjusting bolts, while the lower flange of the equal-frequency spring of each vibration isolator is mounted on an elastic base, which is connected via at least three struts with screws and elastic bushings 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 to it, is placed a cylinder-conical damper, for example? of 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. 2. A spring-loaded equal-frequency vibration isolator according to claim 1, characterized in that the cylindrical conical damper located between the elastic base of the lower flange of the equal-frequency spring and the lower platform of the vibration isolator is combined, while the cylindrical part located on the lower platform of the vibration isolator is made in the form of a cylindrical coil spring and the conical part is in the form of a conical coil spring, while the helical surfaces of the damper springs are covered with a layer of vibration damping material.