FIELD: construction.
SUBSTANCE: vibration insulator for foundations of buildings operating in seismically hazardous areas contains the housing, the base, the resilient element, the lower and the upper travel stop of the resilient element made of an elastomer, and the threaded bushing connecting the resilient element with the vibration-insulated object; the housing is rigidly connected to the base made in the form of a circular thrust bearing on which the lower cylindrical resilient damping element of an elastomer with an axial cylinder-conical opening rests, fulfilling the functions of the lower travel stop of the spring, the axis of which is perpendicular to the base. The spring interacts with the upper and lower travel stops through the lower support cup and the upper spring-enclosing cover which is rigidly connected to the threaded bushing axially symmetrical to the spring, and the upper spring travel stop in the form of a cylindrical bushing enclosing the cover from above is fixed on the cover. The upper travel stop serves as the upper resilient-damping element and is made of an elastomer, and a screw for connecting the resilient element with the vibration-insulated object is fixed in the threaded bushing. The housing in the upper part is connected to the cover, on the butt surface of which, facing the vibration-insulated object, an resilient stop of the dynamic object movement made of an elastomer is fixed, and in the cover perpendicular to its axis an opening is made for pumping a lubricious viscous material, for example solidol, into the system, and two additional damping elements are arranged coaxially with each other and coaxially with the housing in the axial cylinder-conical opening of the lower cylindrical resilient damping element of the elastomer, one of which, having the shape of a cylindrical conical bushing, is made of polyurethane, and the other, arranged inside the first one and having a cylindrical shape, is made as a resilient mesh element. Inside the spring, coaxially thereto, a cylindrical damper made of an elastomer, for example polyurethane, is arranged, wherein the helical groove is made on its cylindrical surface equidistant to the helical spring surface, and the layer of a lubricant, for example, of solidol, is arranged between the contacting helical surfaces of the damper and the spring. The spring coils are covered with a layer of a vibration-damping material, for example polyurethane, and the cylindrical damper of elastomer is made hollow, in the form of a cylindrical bushing, while the stiffness of the cylindrical damper is less than the spring stiffness.
EFFECT: increasing the effectiveness of vibration insulation by increasing the damping of vibrations at low frequencies while maintaining the dimensions of the vibration insulator.
1 dwg
