VIBRATORY INSULATOR FOR EARTHQUAKE-RESISTANT BUILDINGS Russian patent published in 2018 - IPC E02D27/34 

FIELD: construction.

SUBSTANCE: invention relates to protection of buildings and constructions against seismic loads. Vibration isolator for earthquake-proof buildings includes a housing, a base, an elastic member, a lower and upper travel stop of the elastic member made of an elastomer, and a threaded bushing connecting the resilient element with a vibration-insulated object. Body is rigidly connected to the base, made in the form of a circular thrust bearing on which is rests the lower cylindrical resilient damping element of an elastomer with an axial cylindrical hole, functioning as the lower limit of the spring travel, the axis of which is perpendicular to the base. Spring cooperates with the upper and lower travel limiters through the lower support cup and the upper spring covering cover, which is rigidly connected to the axisymmetric spring by a threaded bushing, and on the lid is fixed the upper spring travel stopper, made in the form of a cylindrical bushing covering the top of the lid. Upper limiter serves as the upper elastic-damping element and is made of elastomer, and in the threaded sleeve a screw is attached to connect the elastic element with the vibration-insulated object. Body in the upper part is connected to a cover, on the end face of which, facing the vibration-insulated object, an elastic limiter of the dynamic movement of the object, made of an elastomer, is fixed. Cover comprises an axially perpendicular hole for a ductile lubricant injection, e.g. solid oil, into the system. In the axial cylinder-conic hole of the lower cylindrical resilient damping element of the elastomer, coaxially with each other and coaxially located to the body there are two additional damping elements, one of which, in the form of a cylindrical cone, is made of polyurethane, and the other, located inside the first, and having a cylindrical shape, is made by an elastic mesh element. Inside the spring, coaxial to it, a cylindrical damper made of elastomer, for example polyurethane, is placed, a helical groove is provided on its cylindrical surface, equidistant to the helical spring surface of the spring. Between the contacting screw surfaces of the damper and spring there is a layer of lubricant, for example from solidol. Coil springs are covered with a layer of vibration damping material, for example polyurethane. Cylindrical damper made of elastomer is made hollow, in the form of a cylindrical sleeve, while the stiffness of the cylindrical damper is less than the spring stiffness. Additional damping element located in the axial cylindrical conical opening of the lower cylindrical resilient damping element, and having a cylindrical cone shape, is made of rigid vibrodamping material such as "Agate, Schwim".

EFFECT: technical result consists in increasing the efficiency of vibration isolation by increasing damping of the oscillations at low frequencies while maintaining the dimensions of the vibration isolator.

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