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 comprises a body, a base, an elastic member, a lower and upper stop limiters of the elastic member made of an elastomer, and a threaded sleeve connecting the resilient member to a vibration-insulated object. Body is rigidly connected to the base, made in the form of a circular thrust bearing on which the lower cylindrical resilient damping element of the elastomer with an axial cylinder-conic hole, performing the functions of the lower stop of the spring travel, the axis of which is perpendicular to the base, the spring are connected with the upper and lower travel limiters through the lower support cup and the upper spring covering cover which is rigidly connected to the axially symmetrical spring by a threaded sleeve, and on the cover is fixed the upper stop of the spring travel, made in the form of a cylindrical sleeve, covering the top cover, with the upper limiter serving as the upper elastic-damping element and is made of an elastomer, and in the threaded sleeve a screw is attached to connect the elastic element with the vibration-insulated object, the housing in the upper part is connected to a cover, on the end face of which, facing the vibration-isolating object, an elastic limiter of the dynamic movement of the object, made of an elastomer, is fixed. In the lid, perpendicular to its axis, an opening is provided for pumping a lubricious viscous material into the system, for example solidol, and in the axial cylindrical conical opening of the lower cylindrical resiliently damping element of the elastomer is coaxial 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, and a lubricating layer is located between the damping surfaces of the damper and the spring, for example from a solidol, while the coils of the spring are covered with a layer of a vibration damping material, for example polyurethane, and the 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 that of the spring. Additional damping element disposed within the damping element in the form of a cylindrical cone and having a cylindrical shape is made elastic, in the form of a cylindrical helical spring, the rigidity of which is greater than the stiffness of the damping element having the shape of a cylindrical cone, and the lower cylindrical resilient damping element, in which additional damping elements are located, in its axial cylinder-conic hole, is made of rigid shock-absorbing material such as Agate, Schwim.

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

1 cl, 1 dwg