RU2018115516A - SPACE FREQUENCY VIBROINSULATION SYSTEM - Google Patents

Claims (8)

1. The system of spatial equal-frequency vibration isolation, comprising a frame with a platform located therein to accommodate a vibroinsulated object, characterized in that the frame is made in the form of an open rectangular parallelepiped with lateral faces rigidly connected to each other and to the base, which is additionally connected to the side faces by means of stiffeners, while inside the frame there is a vibration isolation system consisting of at least two horizontally located vibration isolators s equifrequent with coil springs, and at least one vertical isolator with a coil spring, wherein each of the coil springs equifrequent horizontally disposed vibration isolators has variable pitch t, ensuring constancy natural frequency under any load P from a predetermined range: P ₁ ≤R≤R ₂ where P ₁ and P _2, respectively, the minimum and maximum loads under which the conditions of equal frequency are maintained: under the action of the load P, the spring changes its draft δ according to:

where δ ₁ is the specified initial spring draft corresponding to the minimum load P ₁ , while all vibration isolators are elastically connected by a platform made in the form of a volumetric body, for example, a truncated cone, the larger base of which is equipped with a vibration damping element for installing a vibration-insulated object, and in the lower part a truncated cone has a hole in which a cylindrical spring of a vertical vibration isolator enters with a gap, its upper part, while the lateral surface of the truncated cone through a vibrode the puffing elements, made in the form of a two-stage sleeve with a spherical head, abut against the upper parts of horizontally located vibration isolators with equal-frequency screw springs, while the springs of horizontally and vertically located vibration isolators contain identical bases rigidly fixed with them, made in the form of combined vibration damping systems, which in turn, rigidly fixed to the frame of the spatial vibration isolation system. 2. The system of spatial equal-frequency vibration isolation according to claim 1, characterized in that the cylindrical spring of the vertical vibration isolator contains an additional damping element on the external screw surface, made in the form of a polyurethane elastic tube, clad on its external surface, or as an additional damping element on the spring strung "beads" made of round polyurethane. 3. The spatial equal-frequency vibration isolation system according to claim 1, characterized in that each of the combined vibration damping systems of the identical spring bases of the vertical and horizontal vibration isolators contains upper and lower plates connected by struts along the edges of the plates, with elastic bushings coaxially located outside the racks, and in the central part of each spring base there is a cylindrical cone damper, for example from an elastomer, mounted with its cylindrical part on the lower plate the broiler, and the conical part is connected to the upper plate. 4. The spatial equal-frequency vibration isolation system according to claim 3, characterized in that the cylindrical conical damper of the identical spring bases is made hyperbolic in the form of a bar of equal resistance having constant stiffness in the axial and transverse directions, which additionally ensures the equal frequency of the elastic element of the vibration isolators in all directions. 5. The spatial equal-frequency vibration isolation system according to claim 3, characterized in that the cylindrical cone damper of the identical spring bases 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.