RU2018144525A - EMERGENCY-SPACE SPACE EQUILIBRIUM SYSTEM - Google Patents

Claims (10)

1. The system of spatial equal-frequency vibration isolation with emergency locking, 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 side faces rigidly connected to each other and to the base, which is additionally connected to the lateral faces by means of stiffeners, while inside the frame there is a vibration isolation system consisting of at least two horizontally located vibration isolators with equal frequency coil springs, and at least one vertical vibration isolator with a coil spring, each of which is of equal frequency coil springs horizontally located vibration isolators has a variable step t, ensuring the constancy of the natural frequency at any loads P from a given range: P ₁ ≤P≤P 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 predetermined 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 of the truncated cone, a hole is made in which a cylindrical spring of a vertical vibration isolator enters with a gap, its upper part, while the lateral parts of horizontally located vibration isolators equal-frequency helical 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 are rigidly fixed to the frame natural vibration isolation system. 2. The system of spatial equal-frequency vibration isolation with emergency blocking according to claim 1, characterized in that the cylindrical spring of the vertical vibration isolator contains an additional damping element on the outer screw surface, made in the form of a polyurethane elastic tube, clad on its outer surface without gap, or as an additional damping element on the spring strung "beads" of round polyurethane. 3. The spatial equal-frequency vibration isolation system with emergency blocking 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 racks at the edges of the plates, with coaxially located outside the racks elastic sleeves, and in the central part of each spring base there is a cylindrical cone damper, for example, made of elastomer, mounted with its cylindrical part on the bottom plate of the vibration isolator, and connected with the conical part to the top plate. 4. The system of spatial equal-frequency vibration isolation with emergency blocking according to claim 3, characterized in that the cylindrical cone 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 with emergency blocking according to claim 3, characterized in that the cylinder-conical 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. 6. The spatial equal-frequency vibration isolation system with emergency blocking according to claim 1, characterized in that it further comprises an axisymmetric platform in the form of a three-dimensional body, for example, a truncated cone, a travel limiter made in the form of an annular shell, the lower part which through a vibration-damping pad is fixed to the base of the frame, and a cut of the upper part of the annular shell is located above the cut of the lower, smaller base of the truncated cone of the platform, on which a ring-type damping element for emergency operation is attached to the vibration-damping element for installing a vibration-isolating object systems of spatial equal-frequency vibration isolation, when the platform lowers down onto the stroke limiter in the form of an annular shell, while to ensure a smooth landing of the platform on the “stops”, the stiffeners connecting the base with the side faces of the frame contain a damping element located in their middle part, the rigidity of which is less than the rigidity of the frame ribs. 7. The spatial equal-frequency vibration isolation system with emergency blocking according to claim 1, characterized in that the cylinder-conical damper is made in the form of a disk-shaped elastic element containing a frame, in which a plate-shaped elastic element is installed, the frame is made of lower and upper parts, while the lower part the frame consists of a base made in the form of a disk with an annular internal groove in which the lower elastic ring of the plate-shaped elastic element is placed, and the upper part of the frame is made in the form of a cover, which is a disk with a central annular recess, and rigidly connected by, for example, screws with the upper elastic ring of the plate-shaped elastic element, and in the central annular recess of the lid there is a layer of vibration-damping material, for example, polyurethane, on which a mounting plate is fixed for attaching a vibration-insulated object, and a layer of vibration-damping material placed in the central ring recess of the roofs the ki, on which the mounting plate is fixed for fastening the vibration-insulated object, is made in the form of three intermediate vibration-damping layers: the first layer is made of dispersed elastic-damping material, in which crumbs can be used, for example, of the following materials: rubber, cork, foam, capron, foamed polymer, as well as crumbs of solid vibration damping materials, for example, such as agate, anti-vibrate, shvim plastic compound with a size of fractions of crumbs of 1.5 ÷ 2.5 mm, the second layer is made of knitted elastic synthetic fibers, and the size cells knitted from elastic synthetic fibers are 10–15% smaller than the size of fractions of crumb vibration damping materials; and the third layer is made of a continuous damping material in which sponge rubber, needle-punched material of the type “Vibrosil” based on silica or alumino-borosilicate fiber, as well as non-woven vibration-damping material can be used.