SU892050A1 - Oscillation suppressor - Google Patents

Description

(54) ABSORRENT VIBRATIONS

I

The invention relates to vibration damping devices of various machines, mechanisms and structures.

A vibration damper is known that contains masses and elastic elements, connecting the masses with object 1.

The disadvantage of this extinguisher is its low efficiency due to insufficient damping.

The closest to the invention in terms of technical dryness and the achieved result is an oscillation damper containing a mass, having a symmetry plane, and elastic elements connecting the mass to an object 2.

The disadvantage of a snubber is the complexity of its design due to the fact that it is encased in the housing, as well as the complexity of the adjustment.

The purpose of the invention is to simplify the construction.

This goal is achieved by the fact that in the mass from opposite sides there are cavities, symmetrically located relative to the plane of symmetry of the mass, filled with the working medium and connected by a channel, elastic elements in the form of membranes covering the cavities and connected along the contour with mass and centers with the object, and the damper is provided with a sleeve installed in the channel with a calibrated hole.

To simplify operation, the damper can be equipped with sliders mounted on the mass with the possibility of radial movement relative to the membranes and in contact with the latter, and a stopper, the hole under which in the mass crosses the channel, and the sleeve is installed in the stopper.

FIG. 1 shows a vibration damper, a longitudinal section; in fig. 2 - the same, end view; in fig. 3 - torsion damper; 1x oscillations, cross section; in fig. 4 - the same section.

The vibration damper (fig. 1, 2) contains 5 inertial mass 1. In mass 1, cavities 2 and 3 are made on opposite sides, symmetrically located relative to the plane of symmetry of the mass, filled with the working medium and connected by channel 4. Elastic elements in the form of membranes 5 and 6 are connected along the contour with a mass of 1 and centers - with the object 7. In the channel 4 of the mass 1 is installed a sleeve 8 with a calibrated hole 9. At the ends of the mass are installed

the sliders 10 and 11 with screws 12 and 13 and with the possibility of radial movement relative to the membranes 5 and 6 and in contact with the latter. In the mass 1, a hole is made into which the plug 14 with the sleeve 8 is inserted. The plug 14 is fixed on the mass 1 by screws 15.

The vibration damper works as follows.

When the object 7 oscillates, mass 1, due to its inertia, lags in phase relative to the movement of the object, which causes deflection of membranes 5 and 6. At the same time, the object is affected by a force that prevents its oscillations. The deflection of membranes causes a decrease in the volume of one cavity and an increase the volume of the other, which leads to the flow of working medium from one cavity to another through a calibrated hole 9 in the sleeve 8 and causes the dissipation of the energy of the oscillating object.

When installing the damper on the object 7, its natural frequency is tuned to the object oscillation frequency. The adjustment is made by moving the sliders 10 and II relative to the centers of the membranes 5 and 6, followed by fixing in the required position with screws 12 and 13. Since the sliders 10, 11 are in contact with the membranes 5 and 6, the stiffness of the membranes changes as the sliders move.

The setting of the quencher by the magnitude of the hydraulic losses is made by selecting the required diameter of the calibrated orifice of the sleeve 8 and installing the sleeve in the quencher with a plug 14.

For damping torsional vibrations (Fig. 3, 4), the device is positioned on the object, for example, the flywheel 7, around the circumference through 120 °. At the ends of each of the masses 16, cavities 2 and 3 are made, filled with working medium and connected by channel 4. Elastic elements in the form of membranes 5, 6 are connected along a contour with a mass of 16 and centered with a flywheel 7. In channel 4 of mass 16, a sleeve 8 is installed with a calibrated hole 9. At the ends of the masses 16 there are slides (not shown in the drawing) with the possibility of radial movement relative to the membranes 5 and 6. In the mass 16 there is a hole into which a plug is inserted (not shown in the drawing) with the sleeve 8.

The operation of the torsional vibration damper, its tuning in terms of the frequency and magnitude of the hydraulic losses, occurs in the same way as the linear vibration damper.

Installing a vibration damper at the facility will reduce the dynamic loads on the latter, which ultimately will lead to a reduction in the weight of its design and increase its reliability.

Claims (2)

1. A vibration damper containing a mass having a plane of symmetry and elastic elements connecting the mass with an object, characterized in that, in order to simplify the structure, cavities are made on opposite sides of the structure, symmetrically located with respect to the plane of symmetry of the mass and connected by a channel, elastic elements - in the form of membranes, closing the cavity and connected along the contour with mass and centers - with the object, and the damper is equipped with a sleeve installed in the channel with a calibrated hole. 2. The vibration damper according to claim 1, characterized in that, in order to simplify operation, it is equipped with sliders mounted on the mass with the possibility of radial movement relative to the membranes and in contact with the latter, and a stopper, the hole under which in the mass crosses the channel, and the sleeve installed in traffic. Sources of information taken into account in the examination 1. USSR author's certificate number 304373, cl. F 16 F 7/00, 1969. 2. The UK patent number 1367285, cl. F 16 F 7/10, 1970 (prototype). Fi2.1 IK.