RU2018138358A - SPRING VIBRATION ISOLATOR FOR TECHNOLOGICAL EQUIPMENT WITH VARIABLE WEIGHT - Google Patents

Claims (5)

1. Spring vibration isolator 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:

where P ₁ and P _2, respectively, the minimum and maximum loads 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, while the vibration isolator contains an equal-frequency spring, the lower flange of which is fixed on an elastic base, and the upper - on the supporting plate, and on the supporting platform, by means of fasteners, a vibration-isolating object with a variable technological mass is fixed, the platform being connected to the supporting unit, s mounted on the base plate of the vibration isolator by means of adjustment bolts axisymmetric with an equal frequency spring, rigidly connected to bushings covering the adjustment bolts with nuts, and each of the support nodes contains vibration damping bushings coaxially mounted with adjustment bolts, while the lower flange of the equal frequency spring of the vibration isolator is fixed which, by means of at least three posts with screws and with elastic bushings coaxially located outside the posts, is connected about with 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, characterized in that as a vibration damping material covering the outer surfaces of the cylindrical and conical helical springs of a cylinder-conical damper, vibration dampers are used uyuschaya mastic type "WD-17". 2. A spring-loaded vibration isolator for technological equipment with variable weight according to claim 1, characterized in that the vibration damping bushings of the support assembly, coaxially mounted with adjustment bolts, are combined, consisting of three vibration damping layers: the first layer is made of dispersed elastic-damping material in which crumbs are used of the following materials: rubber, cork, polystyrene foam, kapron, foamed polymer, as well as crumbs of solid vibration-damping materials: plastic compound "Agate", "Anti-vibration", "Ш them "with crumb size fractions 1.5 ÷ 2.5 mm, the second layer - knitted from elastic filament, the mesh size of the elastic knitted synthetic yarn, for 10 ÷ 15% smaller size fractions crumb vibration-damping material; and the third layer is made of a continuous damping material in which sponge rubber, needle-punched material “Vibrosil” based on silica or alumino-borosilicate fiber, as well as non-woven vibration-damping material are used.