VIBRATION-INSULATING FOUNDATION WITH INERTIAL MASSES Russian patent published in 2017 - IPC E02D27/44 

FIELD: construction.

SUBSTANCE: vibration-insulating foundation with inertial masses includes an upper structure and a lower structure and vibration insulators with spring supports and balls arranged in spherical shells with a gap, which have spikes interacting with the upper structure. Each vibration insulator is provided with at least three levers and guides for them, mounted on the lower structure. Some lever ends are hingedly connected to the shell, while others are made with counterweights and are connected in series by springs; in the gap between the ball and the shell, rotation bodies are arranged, and the counterweights are fixed to the levers with the possibility of fixed movement. The spring comprises a cylindrical helical spring consisting of two parts with counter-directed ends, one part of which has coils of the rectangular cross-section, and the other part of the spring is made hollow, the counter-directed end of the first part being located in the cavity of the second one, the segment-profile gaps of the contacting spring parts are filled with an antifriction lubricant. At the end of the second part of the spring, a sealing collar is mounted to prevent the lubricant leakage, and the first part of the helical spring, made with coils of the rectangular cross-section with rounded edges, is covered with a tube of a damping material, for example polyurethane. The gaps in the first part of the helical spring, made with coils of the rectangular cross-section, which is covered by the tube of a damping material, are filled with crumbs from a friction material, the gaps in the first part of the helical spring, made with coils of the rectangular cross-section, covered by the tube of a damping material, are filled with crumbs of a frictional material made of the composition containing the following components, at the ratio thereof, wt %: the mixture of resole and novolak phenol-formaldehyde resins iat the ratio of 1:(0.2-1.0) 28÷34; a fibrous mineral filler containing glass-roving or a mixture of glass-roving and basalt fiber in the ratio 1:(0.1-1.0) 12÷19; graphite 7÷18; a friction modifier containing carbon black in the form of the mixture with kaolin and silicon dioxide, 7÷15; barite concentrate 20÷35; talc 1.5÷3.0.

EFFECT: increasing the efficiency of vibration damping, reducing dynamic loads on the lower structure of the foundation.

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