VIBRATION INSULATED FOUNDATION WITH THE VIBRATION ISOLATION PNEUMATIC SYSTEM 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-insulated foundation with pneumatic vibration isolation system includes filled with compressed gas foundation bath, located in the foundation bath support block, elastic member configured as the filled with compressed gas torus and located between the foundation bath and the support block side surfaces, and compressed gas supply pipeline. Support block is made hollow with throttling holes communicating its cavity with the foundation bath cavity and with the torus cavity. Compressed gas supply pipeline is brought into the support block cavity, and onto the support block upper surface level maintenance autoregulator, at that, to its lower surface the additional damping device is rigidly fixed, made hollow in the form of frame, with the support block having equidistant shape and located between the support block and the foundation bath bottom, on which the frame rests through the mesh washer dampers, and which cavity is connected to the support block cavity through the throttling opening, or the additional damping device consists of housing and a piston arranged therein, housing is made in the form of a cylinder with a bottom, in which a piston is located in the form of cup with parallel to each other and coaxial to the housing upper and a lower collars, which are disposed relative to the housing inner surface with a gap, and between the collars a friction material is located, and located between the piston and the housing bottom the spring rests against the piston lower surface, wherein the cavity between the piston and the housing bottom, in which the spring is located, is filled with the friction material with the higher friction coefficient. Piston upper collar upper surface rests against the elastic ring connected to the locking member made, for example, in the form of a locking ring fixed in the groove of the body cylinder inner surface, at that, through the resilient ring the locking element contacts the piston upper collar upper surface, holding it in its original state. As the located between the piston collars friction material, a copper based sintered friction material is used, containing zinc, iron, lead, graphite, vermiculite, copper, chromium, antimony and silicon, with the following components ratio, 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 is the rest. Located between the piston and the body bottom spring is made in the form of a conical spring, which turns are covered with a vibration damping material, for example, polyurethane. Additional damping device mesh washer damper comprises base, elastic mesh element and washers, interacting with the bushings, the base is made in the form of plate with fastening holes. By the lower part the main mesh elastic element rests on the base and is fixed by the lower washer, rigidly connected to the base, and by the upper part is fixed by the rigidly connected to the centrally located piston upper pressure washer, covered with the clearance coaxially located sleeve, rigidly connected to the base, and between the piston lower end and the sleeve bottom the elastic element is located, and the elastic element between the piston lower end and the sleeve bottom is made combined from the filled with elastomer mesh frame, for example, polyurethane, or mesh, with the mesh structure parameters as in the main elastic mesh element.

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

1 cl, 3 dwg