AMORTIZING FOUNDATION RACK FOR EQUIPMENT Russian patent published in 2017 - IPC E02D27/44 

FIELD: construction.

SUBSTANCE: amortizing foundation rack for equipment includes a casing installed on the lower structure with a gap in relation to the upper building and a rod placed in the casing; the rack is equipped with a spring placed between the upper and the lower structures and covering the casing made from coaxial sections, the top outer one and the bottom inner one, with blocks installed on the upper end of the bottom section; the rod is made with a pivot hingedly attached to its lower end, suspended through cables enveloping the blocks to the bottom of the upper casing section. The spring, installed between the lower and upper structures of the foundation, is made in the form of a combined spring with an integrated damper, containing the lower and upper support plates, between which coaxially and concentric the external with right and internal with left angles of turns rise springs are installed. The lower support plate is the basis on which the lower flanges of springs are rigidly fastened, and between the upper support plate and the upper flange of the inner springs with left angle turns, a dry friction damper is installed consisting of two contacting with each other, lower and upper cylindrical disks. The lower disk is rigidly connected to the upper flange of the inner spring, and the upper disc is rigidly connected to the upper support plate. On the surfaces of cylindrical disks of the dry friction damper, facing each other, concentric diametric grooves are made on one of the disks, and bulges on another disk included with each other. As the materials of the lower and upper cylindrical disks of the dry friction damper, a sintered friction material based on copper may be used containing zinc, iron, lead, graphite, vermiculite, copper, chromium, antimony and silicon, with the following component ratio, by weight%: zinc 6.0÷8.0; iron 0.1÷0.2; lead 2.0÷4.0; graphite 3.0÷7.0; vermiculite 8.0÷12.0; chrome 4.0÷6.0; antimony 0.05÷0.1; silicon 2.0÷3.0; copper is the rest.

EFFECT: increased vibration damping efficiency, reduced dynamic loads on the lower structure of the foundation.

2 cl, 2 dwg