RU1825904C - Dampening device - Google Patents

Abstract

Usage: in mechanical engineering and relates to means for damping oscillations of rotors of turbine engines. SUMMARY OF THE INVENTION: a damping device comprising a support body, an intermediate element made in the form of a sleeve with flanges, a set of displacers installed in the flanges, and an elastic split ring on which a damping package of ring plates is mounted and forming a cavity filled with plastic material with the sleeve. The device is also equipped with a concentrated mass, a sleeve mounted on it, a disk rigidly connected to the displacers, pivotally connected to the sleeve by a two-arm linkage mechanism, a smaller shoulder interacting with the disk, a larger one with a concentrated mass, and a spring, one end of which is connected occupied with the latter, and the other is mounted on the sleeve. 1 ill.

Description

The invention relates to damping means for turbine engine rotors and can be applied in the field of mechanical engineering.

The purpose of the invention is to improve the quality of damping over a wide range of speeds by automatically adjusting the elastic-damping characteristics of the package of ring plates during operation.

The drawing shows a damping device, axial section.

The damping device comprises a support body 1, an intermediate element 2 made in the form of a sleeve 3 with flanges 4, a damping package of ring plates 5, displacers 6, 7 and an elastic split ring 8. Ring 8 and sleeve 3 with f. youths 4 form a cavity 9 filled with plastic material (for example, polyurethane). Intermediate 2 is set to

the outer race of the bearing 10. In the device, the displacers 7 are made in the form of plungers symmetrically located relative to the axis of the rotor, the threaded shanks 11 of which are screwed into the disk 12. The disk 12 is brought into contact with the shoulder 13 of the two-shouldered lever mechanism, the pivot axis 14 of which is placed in a slot connected - to the rotor hub of sleeve 15, preloaded by nut 16. The larger shoulder 17 of the two-shouldered linkage mechanism is threadedly connected with the concentrated mass 19. by means of a nut 18 and tightened by a tension spring 20 to the nut 16. Nut and 21 is intended to limit axial displacements of the support.

The damping device operates as follows.

After installing the damping device between the bearing race 10 and the bearing housing 1, a certain

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tension d. The pack of ring plates 5, compressing the ring 8, creates pressure in the plastic material of the cavity 9. The pressure in this cavity is adjusted to that required by screwing in or out of the displacers 6, thereby changing the tension in the package of ring plates 5, which adjusts its elastic and damping properties in the optimal range of vibration damping (at a certain number of rotor revolutions). To automatically control the elastic-damping properties of the device during operation, displacers 7, located symmetrically with respect to the axis of the rotor, are rigidly connected to the disk 12, which is brought into contact with the two-arm linkage. The larger arm 17 of the linkage mechanism is provided with a concentrated mass 19 and is elastically connected with the rotor by a spring 20, the force of which balances the centrifugal forces arising during operation on the mass 19 with the arm 17.

When the device operates in optimal mode (at a given rotor speed), the spring 20 holds the linkage in its original position.

With an increase in the rotor speed, the centrifugal forces on the concentrated mass 19 with the shoulder 17 overcome the force of the spring 20 and the lever begins to rotate around the hinge axis 14. At the same time, the small shoulder 13, making contact with the disk 12, moves it and the hwtock 11 with the displacer 7. This leads to an increase in pressure in the plastic material of the cavity 9, which ensures the creation of optimal elastic and damping properties of the support in the range of the highest vibration damping efficiency at a given rotor angular velocity.

With a decrease in the rotor speed to a predetermined value, system 13. 14, 17, 19 due to a decrease in centrifugal forces on the concentrated mass 19 with a shoulder 17 under

the action of the spring 20 returns to its original position. The excess pressure in the plastic material of the cavity 9 by means of the displacer 7 through the shank 11 returns the disk 12 also to its original position.

Thus, automatic control of the elastic-damping characteristics of the package 5 is realized, thereby reducing the dynamic load on the support in a wide range of rotation speeds

rotor.

Claims (1)

The claims A damping device comprising a support housing, an intermediate element made in the form of a sleeve with flanges, a set of displacers installed in the flanges, and an elastic split ring on which a damping package of ring plates is mounted and forming a cavity filled with plastic material with the sleeve, characterized in that , in order to improve the quality of damping in a wide range of speeds due to automatic adjustment of the elastic-damping characteristics of the package of ring plates during operation, it is equipped with concentrated by a mass, a sleeve mounted on it by a disk rigidly connected to the displacers, pivotally connected to the sleeve by a two-arm lever mechanism, a smaller shoulder interacting with the disk, a larger one with a concentrated mass, and a spring, one end of which is connected to the last and the other fixed to the sleeve. at  to 2 17 fff 7 / j / 3- / ft /