FIELD: construction.
SUBSTANCE: vibration insulator for foundations of buildings operating in seismically hazardous areas comprises a body, a base, an elastic element, lower and upper limiters of elastic element stroke, made of elastomer, and a threaded bushing, which connects the elastic element with the vibration-insulated object. The body is rigidly fixed with the base made in the form of a round step-bearing, against which the lower cylindrical elastically damping element rests, from elastomer with an axial cylindrical and conical hole, performing functions of the lower limiter of the spring stroke, the axis of which is perpendicular to the base. The spring interacts with the upper and lower limiters of the stroke via the lower support sleeve and the upper cover covering the spring, the cover, which is rigidly connected to the threaded bushing that is axisymmetric to the spring. On the cover there is an upper limiter of spring stroke fixed, made in the form of a cylindrical bushing covering the cover on top. The upper limiter serves as the upper elastically damping element and is made from elastomer, and in the threaded bushing the screw is fixed for connection of the elastic element with the vibration-insulated object. The body in the upper part is connected with the cover, on the end surface of which, facing towards the vibration-insulated object, there is an elastic limiter of object dynamic stroke fixed, made from elastomer, and in the cover, perpendicular to its axis, there is a hole for pumping of viscous lubricant into the system, for instance, solid oil. In the axial cylindrical and conical hole of the lower cylindrical elastically damping element from elastomer there are two additional damping elements arranged coaxially to each other and axially to the body, one of which, shaped as a cylindrical and conical bushing, is made from polyurethane, and the other one, arranged inside the first one and having cylindrical shape, is made as an elastic meshed element, density of the meshed structure of the elastic meshed element is in optimal interval of ranges 1.2 g/cm3…2.0 g/cm3. Material of wire of elastic meshed elements - steel of grade EI-708, and its diameter is in the optimal interval of values 0.09 mm…0.15 mm. The spring is made from a helical, hollow and elastic steel tube, inside of which at least one additional elastic steel tube is installed axisymmetrically with a gap. In gaps between tubes there is at least one friction element, for example, from polyethylene having high coefficient of thermal expansion compared to steel. Surfaces of the body and the additional elastic steel tube contact with surfaces of friction elements, and their axes match the axis of the body turns, and a helical elastic rod made as solid is arranged centrally, coaxially and axisymmetrically to the body, and friction elements are made as tubular, for example, from polyurethane.
EFFECT: increased efficiency of vibration insulation.
4 cl, 2 dwg
