SU808625A1 - Dynamic oscillation damper - Google Patents

Description

The invention relates to construction * and is intended to reduce the fluctuations of high-rise buildings, which ensures their normal operation, and therefore durability.

Known dynamic damper,. including an inertial mass suspended from a horizontal "-,) n shaft rigidly attached to the supporting structure, at the end of which a sleeve is mounted, passed through a guide slot in the inertial mass and a device for adjusting the damper.

The device for adjusting the damper includes an adjusting screw, the end of which abuts against the sleeve. Absorber adjustment: made by changing the eccentricity of the center of gravity of the inertial mass 20 using the adjusting screw G1].

The suspension design of the inertial mass to the supporting structure provides for the possibility of using 25 known damper only to damp vibrations of structures with a small mass and is not suitable for high-rise structures with a large mass, since the mass of the structure and inertial 30 mass are directly dependent on each other.

In addition, the adjustment of the damper by changing the eccentricity of the center of gravity of the inertial mass with its large value is very difficult, since it requires a lot of effort to turn the adjusting screw.

The closest technical solution to the proposed one is a dynamic vibration damper, including a shaft with an axisymmetric mass rigidly fixed on it, the center of gravity of which is placed on the axis of the shaft, the supporting ends of which are mounted on curved guides with the ability to move along them. This damper can be used to damp vibrations of structures with a large mass (2].

However, the disadvantage of the known damper is the impossibility of its optimal tuning, i.e. tuning to the actual frequency of oscillations of the structure, which significantly reduces the efficiency of the damper.

The purpose of the invention is to increase efficiency due to optimal tuning it.

This goal is achieved by the fact that in a dynamic vibration damper, including a shaft with an axisymmetric mass rigidly fixed on it, the center of gravity of which is placed on the axis of the shaft, the supporting ends of which are mounted on curved guides with the possibility of movement along them, the shaft ends are equipped with elements of variable transverse sections.

Options are provided. ” absorber, on which support elements. You can be made in the form of removable bushings with an outer cylindrical surface, or in the form of bushings with an outer conical surface, or in the form of paired tapered bushings 15 located at a certain distance from each other, facing smaller diameters to each other, and installed with the possibility of movement along the axis of the shaft. 20

In FIG. 1 shows a damper with cylindrical bushings, general view; in FIG. 2 is a section AA in FIG. 1; in FIG. 3 - damper with conical bushings; in FIG. 4 - the same, with paired 25 tapered bushings at each end of the shaft.

Dynamic vibration damper includes a shaft 1 with an axisymmetric mass 2 axis rigidly fixed on it, the center of gravity 3 of which is located on the axis 4 of the shaft 1. The ends of the shaft 1 are provided with removable supporting elements 5 made in the form of bushings with an outer cylindrical surface (Fig. 1) or with a conical surface (figure 2), as well as in the form of paired conical bushings 5 located at some distance from each other and facing smaller diameters to each other. The supporting elements 5 are mounted on curved 40 guides 6 with the ability to move of them rigidly attached to the structure 7.

The conical bushings can be moved along the shaft, lowering or raising this “inertial mass. The use of removable support elements of different cross sections and different configurations at the shaft ends allows one to change the distance from the center of gravity 3 of the inertial mass 2 to the guides 6, and thereby adjust the damper in place to the actual oscillation frequency of the structure, i.e., increase the damper’s efficiency.

Claims (2)

The invention relates to construction and is intended to reduce vibrations of high-rise structures, which ensures their normal operation and, consequently, durability. A dynamic oscillation damper is known, comprising an inertial mass suspended from a horizontal shaft rigidly attached to the supporting structure, at the end of which a sleeve is fixed, passed through the guide slot in the inertial mass and the adaptation device for adjusting the damper. The device for adjusting the damper includes an adjustment screw, the end of which rests on the sleeve. Adjustment of the quencher: is made by changing the eccentricity of the center of gravity of the inertial mass using the adjustment screw Cl. The design of the suspension of inertial mass to the supporting structure provides for the possibility of using the known damper only to dampen vibrations of structures with a small mass and is not suitable for high-altitude structures having a large mass, since the mass of the structure and the inertial mass are directly dependent on each other. In addition, the adjustment of the quencher by changing the eccentricity of the center of gravity of the inertial mass with its large value is very difficult, since it requires the application of a very large force to turn the adjusting screw. The closest technical solution to the proposed one is a dynamic oscillation damper, including a shaft with an axisymmetric mass rigidly fixed on it, the center of gravity of which is placed on the shaft axis, the supporting ends of which are mounted on curvilinear guides with the possibility of moving along them. This absorber can be used to dampen vibrations of structures having a large mass 2. However, a disadvantage of the known damper is the impossibility of its optimal tuning, i.e. tuning to the actual oscillation frequency of the structure, which significantly reduces the efficiency of the damper. The purpose of the invention is to increase efficiency by optimally adjusting it. This goal is achieved by the fact that in a dynamic oscillation damper, including a shaft with an axisymmetric mass rigidly attached to it, the center of gravity of which is placed on the shaft axis, the supporting ends of which are mounted on curved guides with the possibility of moving along them, the shaft ends are fitted elements of variable cross section. Extinguishing options are provided; 1, on which the supporting elements, you can be made in the form of removable sleeves with an outer cylindrical surface, or in the form of sleeves with an outer conical surface, or in the form of a pair of conical sleeves located at some distance from each other facing smaller diameters to each other and mounted for movement along the axis of the shaft. FIG. 1 shows a damper with cylindrical bushings, general view; FIG. 2 is a section A-A in FIG. one; in fig. 3 - damper with tapered bushings; in fig. 4 - the same, with paired conical bushings at each end of the shaft. The dynamic vibration damper includes a shaft 1 with an axisymmetric mass 2 axis rigidly fixed on it, the center of 3 tons of tin which is located on the axis 4 of shaft 1. The ends of shaft 1 are provided with removable support elements 5 made in the form of bushings with an outer cylindrical surface (Fig. ) or with a conical surface (Fig. 2), as well as in the form of paired conical sleeves 5 located at some distance from each other and facing smaller diameters to each other. Supporting elements 5 are mounted on curved rails b with the ability to move neither of them is rigidly attached to the structure 7. The tapered bushing can be moved along the shaft, omitting or lift this inertial mass. The use of removable support elements of different cross section and different configurations at the shaft ends allows the distance from the center of 3 tons of inertial mass 2 to the guides 6 to be changed, and thereby setting the damper in place to the actual oscillation frequency of the structure, i.e. to increase the efficiency of the quencher. Claim 1. Dynamic oscillation damper, including a shaft with an axisymmetric mass rigidly fixed on it, the center of gravity of which is placed on the shaft axis, the supporting ends of which are mounted on curvilinear guides with the ability to move along them, in order to increase efficiency the damper due to its optimal setting, the shaft ends are provided with elements of variable cross section. 2. The damper according to claim 1, of which is made in that the elements are made in the form of removable sleeves with an outer cylindrical surface. 3. The damper according to claim 1, which is designed in such a way that the elements are made in the form of -blocks with an outer conical surface and mounted for movement along the axis of the shaft. 4. The damper according to claim 1, characterized in that each element is made in the form of paired conical bushings spaced apart from each other, of smaller diameters relative to each other and installed with the possibility of movement along the shaft axis. Sources of information taken into account during the examination 1. USSR author's certificate No. 557220, cl. F 15 F 15/02, 1976. 2. The patent of Germany No. 1281294, cl. 65 A 39/02, published. 1967 (prototype). // XVX / yX / X // XoXX C // V y l // / f /.