RU2019133938A - VIBRATION-INSULATED PLATFORM WITH DAMPER SPRING - Google Patents

Claims (6)

A vibration-insulated platform with a damping spring, containing a body and elastic elements, the body is made in the form of rigid upper and lower plates, between which at least three helical elastic elements are located, fixed by at least three pins, each with their bases to both plates, while the lower plate, in its peripheral part, is attached to an annular elastic element made of elastomer, the height of which is 2 ÷ 4 times the height of the lower states, as well as a central cylindrical elastic element with a conical buffer fixed at its free end facing the upper plate, and on the end part of the annular elastic element made of elastomer, an annular buffer is fixed, facing the annular buffer fixed on the upper plate, and the cross section of one of the annular buffers is made of a triangular profile, and the other, oppositely arranged with it, is a rectangular profile, the helical elastic elements are made in the form of a package consisting of parallel flax connected by upper and lower bases, axisymmetric and coaxially located, at least three, cylindrical helical springs of different stiffness and height, which allows the vibration isolation system to provide radio frequency properties and, therefore, high efficiency of vibration isolation, regardless of the mass of the vibration isolation object, and in a static , in the unloaded state, the lower ends of the coaxially located at least three cylindrical helical springs lie in the plane of the lower base, and the upper ends, with their peripheral surfaces, touch the conical surface connecting them, in such a way that the generatrix of the conical surface connects the upper ends at least three, cylindrical helical springs, or helical elastic elements of the vibration-insulated platform are made in the form of a combined spring with a torsion damper containing a cylindrical helical spring, consisting of two parts with oppositely directed ends, one hour a part of which has turns of rectangular cross-section, and the other part of the spring is hollow, while the oppositely directed end of the first part is placed in the cavity of the second, the gaps of the segment profile of the contacting parts of the spring are filled with antifriction grease, while at the end of the second, part of the spring, a sealing collar is installed to prevent grease leaks, and the first part of the coil spring, made with rectangular coils with rounded edges, covers a tube made of damping material, for example polyurethane, and the gaps in the first part of the coil spring made with rectangular coils, which the tube of damping material encompasses, are filled crumbs made of friction material, the gaps in the first part of the coil spring, made with turns of rectangular cross-section, which is enclosed by a tube of damping material, are filled with crumbs of friction material made of a composition including the following components, at their ratio, wt. %: mixture of resole and novolac phenol-formaldehyde resins in a ratio of 1: (0.2-1.0) 28 ÷ 34% fibrous mineral filler, containing glass roving or a mixture of glass roving and basalt fiber in a ratio of 1: (0.1-1.0) 12 ÷ 19% graphite 7 ÷ 18% carbon black friction modifier as a mixture with kaolin and silicon dioxide 7 ÷ 15% barite concentrate 20 ÷ 35% talc 1.5 ÷ 3.0% and on the upper and lower support rings, the upper and lower vibration damping plates are fixed, consisting of alternating layers of elastic material, for example, sheet spring steel, and layers of vibration damping material, for example, hard grades of vibration damping materials, such as plastic compound of the type "Agat", "Antivibrit" , "Shvim", while between the upper and lower support rings, to which the upper and lower vibration damping plates are attached, axially and coaxially to the support rings of the spring, an elastic damping device is fixed, made in the form of a torsion damper that perceives alternating torsional loads, for example, in the form of a rod made of polyurethane, characterized in that the elastic damping elements located between the hard disk of the truncated cone shell and the base of the vibration-insulated platform are made in the form of disk-shaped elastic elements, each of which contains at least two flat elastic, coaxially located rings, upper and lower it connected to each other by means of at least three flat plates located obliquely with respect to the axis of the rings, and the plates connecting the upper and lower rings can be made in the form of elastic rods of a circular or square profile, or elastic damping elements located between the hard disk the shells of the truncated cone and the base of the vibration-insulated platform are made in the form of a cylindrical body, with which the upper and lower, oppositely and axisymmetrically located elastic damping round plates with collars are firmly connected, against which axisymmetrically located disk springs abut with their large base: the upper and lower springs, respectively, with the smaller bases of the Belleville springs are fixed by axisymmetrically located upper and lower circular plates with central discs, against which the axisymmetrically located Belleville springs abut with their smaller base, while the spaces between the circular plates with bu rtiks and round plates with central disks, filled with elastic mesh-type elements, the density of the mesh structure of which is in the optimal range of values: 1.2 g / cm ³ ... 2.0 g / cm ³ , and the wire material of the elastic mesh elements is steel grade EI -708, and its diameter is in the optimal range of 0.09 mm ... 0.15 mm, while the space between the round plates is filled with elastomer, polyurethane, while between the round plates with shoulders, inside the body, a torsional vibration damper is located axisymmetrically, made in the form of an elastic spherical shell, axisymmetrically located between the upper and lower stops, fixed respectively to the upper and lower plates of the cylindrical body, and made in the form of second-order surfaces, for example, truncated paraboloids or hyperboloids, while the surfaces of the stops in contact with the surface of the elastic spherical shell covered with friction material, and inside a spherical shell , axisymmetrically to the body, there is a cylinder with a kinematic non-self-braking screw pair "screw-nut", rigidly connected to the elastic spherical shell, while the screw of the screw pair "screw-nut" is rigidly connected to the upper elastic damping round plate with collars.