VIBRATION INSULATING FOUNDATION WITH INERTIAL MASSES Russian patent published in 2018 - IPC E02D27/44 

FIELD: construction.

SUBSTANCE: invention relates to the protection means against the vibration harmful influence and can be used in construction, in particular in the vibration-insulated foundations devices for machines and equipment with dynamic loads. Vibration isolating foundation with inertial masses includes the upper and lower structures and the vibration isolators with spring supports and arranged in spherical shells with a gap balls, having interacting with the upper structure spikes. Each vibration isolator is provided with at least three levers and mounted on the lower structure guides for them, wherein the levers one ends are pivotally connected to the shell, and the other ones are made with counterweights and are in series connected to each other by springs, in the gap between the ball and the shell the rolling elements are placed, and the counterweights are fixed on the levers with possibility of fixed movement. Spring containing the cylindrical helical spring consisting of two parts with oppositely directed ends, which one part has turns of rectangular cross section, and the spring other part is made hollow, at that, the first part counter-directed end is located in the second cavity, the spring segmented profile contacting parts gaps are filled with antifriction lubricant, at that, at the spring second part end there sealing collar is installed to prevent the lubricant leakage, and the helical spring first part, made with coils of rectangular cross-section with rounded edges, is covered by the tube of damping material, for example polyurethane. Gaps in the made with coils of rectangular cross section helical spring first part, which is covered with the tube of damping material, are filled with crumbs from the friction material, gaps in the made with coils of rectangular cross section helical spring first part, which is covered by the tube of damping material, are filled with crumbs from the friction material made of a composition, comprising the following components, with their ratio, wt.%: mixture of phenol-formaldehyde resole and novolac resins in the ratio of 1:(0.2–1.0) 28÷34, fibrous mineral filler containing glass-roving or the glass-roving and basalt fiber mixture in the ratio of 1:(0.1–1.0) 12÷19, graphite 7÷18, friction modifier containing carbon black in the form of mixture with kaolin and silicon dioxide 7÷15, barite concentrate 20÷35, talc 1.5÷3.0. Gaps in the made with coils of rectangular cross section helical spring first part, which is covered by the tube of damping material, are filled with crumbs from the copper based sintered friction material made of a composition, comprising the following components, with their ratio, in wt.%: 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; chromium 4.0–6.0; antimony 0.05–0.1; silicon 2.0–3.0; copper – the rest.

EFFECT: technical result consists in increase in the vibration damping efficiency and reduction of dynamic loads on the foundation lower structure.

1 cl, 3 dwg