SU1442749A1 - Dynamic vibration damper - Google Patents

Abstract

The invention relates to mechanical engineering, namely to means of damping vibrations of various objects. The aim of the invention is to increase the efficiency achieved due to the ability to damp oscillations in different directions and by expanding the range of operating frequencies. Under the action of the load on the object 7, it is mixed, which is accompanied by mixing and turning of the elastic rods 1 in the rings 3 and oscillations of the masses 2 along the rods 1, which will compensate for the movement of the object with an appropriate choice of the stiffness values of the rods 1, the masses 2 and the stiffness of the springs 5 and 8. The oscillation of the object 7 is damped in different directions due to the fact that the rods 1 are arranged relative to each other at arbitrary angles. The adjustment of the dynamic vibration damper can be measured using the sensors of the tuner and devices for displacing the spring stiffness. 4 hp f-ly, 5 ill. o (l

Description

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The invention relates to mechanical engineering, namely to means of damping vibrations of various objects.

The purpose of the invention is to increase the efficiency achieved due to the ability to damp oscillations in different directions and by expanding the range of operating frequencies.

FIG. 1 shows a diagram of the dynamic damper; in fig. 2 - the same, with the rings installed with the possibility of mixing along the line connecting the points of installation of the rings; in fig. 3 - the same, with an additional spring and rings mounted for movement along the rods; in fig. 4 - the same, with elastic elements connecting the masses and rings; in fig. 5 - the same with the tuner.

The dynamic vibration damper contains elastic rods 1, masses 2, installed 2 on one of the ends of rods 1,, and 3 mounted on the base 4, springs 5 connecting the masses 2, and hinges 6 mounted on the object 7.

The rods 1 are connected in pairs by other

The vibration damper works as follows.

The signals from the vibration velocity sensors 10 and vibration displacement 11 (FIG. 5) are fed to the tuning unit 12. In the case of a discrepancy between the resonant frequency of the quencher and the oscillation frequency of the object 7, the output of the block 12 generates a signal applied to the inputs

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the ends between each other through the hinges 6 and 25 of the device 13 for moving the rings 3 and set at an angle to each other, and the masses 2 are spring-loaded relative to the rods I-.

Rings 3. Can be set so that they can move along the line connecting their points of installation (Fig. 2).

The vibration damper can be equipped with an additional spring 8, mounted between our hinge 6 and the object 7, and the rings 3 are installed with the possibility of their movement along the rods 1 (Fig. 3).

The quencher damper can be equipped with elastic elements 9 connecting the masses 2 and the ring 3 (Fig. 4).

The vibration damper can also be equipped with vibration velocity sensors 10 installed on the object 7 and vibration vibration sensors 11, connected to them by a setting unit 2 connected to the last device 13 moving rings 3 and tension device 14 springs 5 (Fig. 5).

The vibration damper works as follows.

Under the action of the load on the object 7, it moves, which is accompanied by displacements and rotations of elastic rods 1 in rings 3 and oscillations of masses 2 along rods 1. With appropriate selection of the stiffnesses of the elastic rods 1, mass 2 and stiffness of the springs 5 - to adjust in antiresonance in relation to the object oscillations 7 - oscillations

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The tension tension spring 14 is provided. By moving the rings 3 and changing the stiffness of the springs 5, the damper is tuned to the object's oscillation frequencies, which expands the operating frequency range of the damper.

Claims (5)

1. A dynamic vibration damper containing elastic rods — masses mounted on one of them, end of the shaft, and rings freely on the shaft, mounted on a base, characterized in that it is equipped with hinges to be mounted on the object and springs, the rods are connected in pairs by other ends. between themselves through the hinges and arranged at an angle to each other, the masses are spring-loaded relative to the rods and interconnected by means of springs. 2. The vibration damper according to claim 1, characterized in that the rings are mounted for movement along a line connecting the mounting points of the rings. 3. The vibration damper in paragraphs. 1 and 2, characterized in that it is provided with additional springs to be installed between the hinges and the object, and the rings are installed with the possibility of moving along the rods. 4. The vibration damper in paragraphs. I-3, the ogles of 1 with masses 2 will be extinguished by a cola-55 due to the fact that it is provided with elastic object baths 7. Since rods are 1 races, connecting masses and rings, are relative to each other5. Vibration damper on PP. 1-4, detached from an arbitrary angle, then the damping is in that it is supplied with a setting five about Objects 7 can be carried out in different directions (Fig. 1). Vibration damping will also occur as a result of parametric resonance in the damper, namely, due to resonant oscillations of masses 2 along rods 1 (Fig. 1). when the object 7 oscillates, the length of the rods 1 changes from the pinching point of the rod in the ring 3 to the free end, which leads to the appearance of a parametric resonance of the vibrations of the rods 1, compensating for the oscillations of the object 7 (Fig. 2-4). The installation of an additional spring 8 provides the appearance of additional antiresonant frequencies, which leads to an expansion of the range of operating frequencies (Figs. 3 and 4). The vibration damper works as follows. The signals from the vibration velocity sensors 10 and vibration displacement 11 (FIG. 5) are fed to the tuning unit 12. In the case of a discrepancy between the resonant frequency of the quencher and the oscillation frequency of the object 7, the output of the block 12 generates a signal applied to the inputs 5, the device 13 for moving the rings 3 and 0 the device 13 to move the rings 3 and 0 five 0 14 natures of spring springs 5. By moving the rings 3 and changing the stiffness of the springs 5, the damper is tuned to the vibration frequencies of the object, which expands the range of damper operating frequencies. Invention Formula 1. A dynamic vibration damper containing elastic rods — masses mounted on one of them, end of the shaft, and rings freely on the shaft, mounted on a base, characterized in that it is equipped with hinges to be mounted on the object and springs, the rods are connected in pairs by other ends. between themselves through the hinges and arranged at an angle to each other, the masses are spring-loaded relative to the rods and interconnected by means of springs. 2. The vibration damper according to claim 1, characterized in that the rings are mounted for movement along a line connecting the mounting points of the rings. 3. The vibration damper in paragraphs. 1 and 2, characterized in that it is provided with additional springs to be installed between the hinges and the object, and the rings are installed with the possibility of moving along the rods. 4. The vibration damper in paragraphs. I-3, vibration velocity and vibration displacement sensors attached to an object, connected to them by a tuner and connected with the latest devices for moving the rings and changing the tension of the springs. ./ 7 / / W / V / 2 G. 2 ///// l / //// eight / // ///////// J h / L ag fuz. five