VIBRATED INSULATED FOUNDATION 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 includes the bath, the foundation block, which is placed in it with the gap in relation to the walls and the bottom and vibration isolators in the form of the spring-mounted roller bearings that are installed on the bottom of the bath and of the inclined rods that are attached to them with the lower ends, onto the top ends of which the foundation block is thrust. Foundation block is thrust onto the upper ends of the rods freely, its lower surface in the contact area with the rods is made with cylindrical recesses, the generating line of each of them is oriented horizontally and perpendicularly to the corresponding rod. Roller bearings are connected by means of the spring and from the side facing the walls of the bath they are equipped with buffer elements. Lower edge of each recess of the foundation block is formed with a thrust and an additional spring is attached to its upper edge with one end, the other end of which is connected to the upper end of the corresponding rod, and the total rigidity of the additional springs is less than the rigidity of the main spring. Main spring, which connects the roller bearings, is made in the form of the cylindrical spring, which consists of two parts with oppositely directed ends, one part of which has coils of rectangular cross section, and the other part of the spring is made hollow, the counter-directed end of the first part is located in the second cavity, the gaps of the segment profile of the spring contacting parts are filled with antifriction lubricant. At the end of the second part of the spring, the sealing collar is installed in order to prevent leakage of the lubricant, and the helical spring first part, which is made with the coils of rectangular cross-section with rounded edges, is covered by the tube of damping material, for example polyurethane. Gaps, in the first part of the helical spring, made with coils of rectangular cross-section, which is covered by the tube of damping material, are filled with granulated friction material. Gaps in the first part of the helical spring, which is made with the coils of rectangular cross-section and covered by the tube of damping material, is filled with granulated friction material made of a composition comprising the following components, 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%. Onto the upper and lower support rings the upper and lower vibrating damping plates are fixed, which consist of alternating layers of elastic material, for example sheet spring steel, and layers of the vibration damping material, for example, hard varieties of the vibration damping materials, such as plastic compound of the "Agat", "Antivibrit", "Schwim" types. Between the upper and lower support rings, to which the upper and lower vibration damping plates are attached, axially symmetric and coaxial to the spring support rings, the elastic-damping device is fixed, which is made in the form of the torsion damper that senses alternating torsional loads, for example, in the form of the rod, which is made of polyurethane.

EFFECT: technical result consists in increased efficiency of vibration damping, reduced dynamic loads onto the lower structure of the foundation.

1 cl, 2 dwg