RU2553492C1 - Elastic damping support of rotor - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: elastic damping support comprises an external (1) and an internal (4) rings and a set of circular corrugated plates (3). The external (1) and internal (4) rings are provided with pockets which are of rectangular shape and are made on the external ring (1) on the inner side and on the internal ring (4) on the outer side. Plate displacers (2) with their upper edges being of the same shape as the circular plates (3) contacting with them are, are pressed-in in the pockets.

EFFECT: prevention of plastic deformation of plates in the zone of their contact with supports, longer service life of a ready product, simplified design.

2 cl, 2 dwg

Description

The invention relates to the field of transport engineering and can be used in machines and mechanisms with rapidly rotating rotors to reduce the vibration level of rotors, especially in resonance modes by dissipation of vibration energy.

Known damping device in which the unloading of the rotor from the weight is realized due to the redistribution of internal forces in the package of corrugated plates. In the lower part of the damper, the corrugations are made larger than in the upper part of the height. When perceiving the weight of the rotor due to the difference in interference, the weight of the rotor is perceived (AS USSR No. 1370339, IPC: F16F 7/00. Damping device, author VA Antipov, publ. 30.01.1988, BI No. 4).

The disadvantages of this device are the complexity of the manufacturing technology, the absence of a computational model (for corrugations of different heights) and work under high interference, which also significantly worsens the dissipative properties of the damper.

Known elastic-damper support of the rotor, including the outer and inner rings and a package of ring plates installed between them, characterized in that the outer and inner rings are made with threaded holes in which threaded displacers are installed that regulate the given height of the corrugations in the plate package (patent for utility model No. 130359, IPC: F16F 7/00, F16C 27/00, Elastic-damping support of the rotor, authors: VA Antipov, SV Andriyanov, SA Velmin, GV Izranova, published on July 20, 2013, Bull. No. 20).

The disadvantage of this invention is the undesirable plastic deformation of the plates in the areas of their contacts with threaded displacers and, as a consequence of this, a reduced resource of the finished product.

This technical solution was made as a prototype.

The technical result is to prevent the occurrence of plastic deformation of the plates in the areas of their contact with the supports and, as a consequence of this, increase the resource of the finished product, simplifying the design.

The technical result is achieved in that the elastic-damping support, including the outer and inner rings and a package of annular corrugated plates, is characterized in that the outer and inner rings are made with pockets, and the pockets are rectangular in shape on the outer ring on the inside and on the inner ring from the outside, displacer plates with upper edges repeating the shape of the ring plates in contact with them are pressed into pockets.

In addition, the outer ring can be made with protrusions, the upper edges of which follow the shape of the plates in contact with them.

Figure 1 presents the elastic-damper support in section, figure 2 - plate-displacer 2.

The elastic-damper support consists of an outer ring 1, displacer plates 2, a package of ring plates 3, an inner ring 4.

The device operates as follows.

The plates 2 are pressed into the outer ring of the elastic-damper support, the ring plate package 3 is installed on the supporting surfaces of the plates, and the inner ring 4 is installed inside the package 3, into which the displacer plates are then pressed one by one 2. By selecting plates of different heights, the necessary interference each radial direction.

Thus, the damping device does not need to install any additional unloading devices from static forces, for example, the weight of the rotor, which greatly simplifies the design of the damper. Using plates 2, the interference in all directions is set optimal, in terms of the maximum efficiency of the damper in this direction. In addition, the outer ring can be made with milled protrusions that repeat the shape of the propellant plates 2.

The displacer plates 2 for pressing into the inner ring may have a wedge-shaped inlet which is removed after the displacer plates are pressed into the inner ring. This prevents crushing of the ring plates during pressing and is a technological measure. After assembly, the package of ring plates takes the form of corrugations of unequal height (see figure 1).

When exposed to a vibrational load, for example, from an imbalance of a rotating rotor, the corrugations from the side of the acting load acquire a greater height of the corrugations, choosing a gap between the ring plates 3 and ring 1, due to the difference in the radii of the bends of the plate in the package slip with friction relative to each other and energy dissipation occurs vibrations. At the same time, under the influence of the load, the corrugations do not straighten, but become even steeper, which positively affects the efficiency of vibration suppression.

Compared with the prototype, when exposed to vibrational load, plastic deformation of the package of plates 3 does not occur in the areas of their contacts with the displacer plates, since they have a shape that repeats the shape of the corrugations in the contact areas.

The proposed elastic-damping support is simple to manufacture, by eliminating the operations of crimping, thermofixing and extruding corrugations, it effectively suppresses vibration by ensuring optimal compression of the corrugations in all radial directions, has a simple design by eliminating the need to install additional load devices from the weight of the rotor and improves operational characteristics of the elastic damper support, in particular, increases its resource.

Claims (2)

1. The elastic-damper bearing, including the outer and inner rings and a package of annular corrugated plates, characterized in that the outer and inner rings are made with pockets, and the pockets are rectangular in shape on the outer ring on the inside and on the inner ring on the outside, displacer plates with upper edges repeating the shape of the ring plates in contact with them are pressed into pockets. 2. The support according to claim 1, characterized in that the outer ring is made with protrusions, the upper edges of which follow the shape of the plates in contact with them.

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