阅读说明：本技术 一种减振阻尼结构 (Vibration damping structure ) 是由 姜永强 刘冬 印雪梅 于 2019-09-22 设计创作，主要内容包括：本申请属于压气机减振设计技术领域,具体涉及一种减振阻尼结构,包括：静子叶片；静子内环,在静子叶片上设置；与静止叶片相邻的转子叶片；悬臂环,其一端与转子叶片连接,其另一端伸入静子内环内侧,与静子内环蓖齿蜂窝配合；悬臂环内侧具有第一环形槽；减振阻尼圈,设置在第一环形槽中。(The application belongs to the technical field of compressor damping design, concretely relates to damping structure, include: a stator blade; the stator inner ring is arranged on the stator blade; a rotor blade adjacent to the stationary blade; one end of the cantilever ring is connected with the rotor blade, and the other end of the cantilever ring extends into the inner side of the stator inner ring and is matched with the grate tooth honeycombs of the stator inner ring; the inner side of the cantilever ring is provided with a first annular groove; and the vibration damping ring is arranged in the first annular groove.)

1. A vibration damping structure, comprising:

a stator blade (1);

a stator inner ring (2) provided on the stator blade (1);

A rotor blade (3) adjacent to the stationary blade (1);

one end of the cantilever ring (4) is connected with the rotor blade (3), and the other end of the cantilever ring extends into the inner side of the stator inner ring (2) and is matched with the grate tooth honeycomb of the stator inner ring (2); the inner side of the cantilever ring (4) is provided with a first annular groove;

and the vibration damping ring (5) is arranged in the first annular groove.

2. the vibration damping structure according to claim 1,

And the vibration reduction damping ring (5) is in clearance fit with the first annular groove.

3. The vibration damping structure according to claim 2,

the vibration reduction damping ring (5) is provided with a gap.

4. the vibration damping band of claim 3,

and a second annular groove is formed in the inner side of the vibration damping ring (5).

5. The vibration damping band of claim 3,

the angle of the gap along the circumferential direction is between 5 and 10 degrees.

6. The vibration damping structure according to claim 1,

The first annular groove is close to one end, extending into the inner side of the stator inner ring (2), of the cantilever ring (4).

Technical Field

the application belongs to the technical field of vibration reduction design of a gas compressor, and particularly relates to a vibration reduction damping structure.

background

The rotor and the stator of the gas compressor are mostly sealed by adopting the grate teeth, and along with the increasing thrust-weight ratio, the lighter weight and the higher rotating speed of the gas compressor, the air elasticity generated by the grate tooth sealing between the rotor and the stator of the gas compressor when the gas compressor works enables a cantilever structure between the rotor and the stator of the gas compressor to generate violent vibration and generate instability in serious conditions, so that collision and friction are generated between the rotor and the stator of the gas compressor, and parts are damaged.

For the above problems, the excitation frequency of the relevant component is mostly changed by increasing the strength and rigidity of the relevant component so as to suppress the vibration, and the technical solutions have the following defects:

1) The quality of the compressor is greatly increased, the quality of the compressor is reduced, and the performance of the compressor is sacrificed;

2) The structural shape of related parts is required to be changed more, and the gap between a rotor and a stator of the compressor is increased, so that the matching problem of the whole compressor is caused;

3) and the method belongs to passive design, needs repeated calculation, analysis and modification, and has long time and low efficiency.

The present application is made in view of the above-mentioned drawbacks of the prior art.

Disclosure of Invention

It is an object of the present application to provide a vibration damping structure that overcomes or mitigates at least one of the disadvantages of the prior art.

The technical scheme of the application is as follows:

there is provided a vibration damping structure including:

a stator blade;

The stator inner ring is arranged on the stator blade;

A rotor blade adjacent to the stationary blade;

One end of the cantilever ring is connected with the rotor blade, and the other end of the cantilever ring extends into the inner side of the stator inner ring and is matched with the grate tooth honeycombs of the stator inner ring; the inner side of the cantilever ring is provided with a first annular groove;

And the vibration damping ring is arranged in the first annular groove.

According to at least one embodiment of the present application, the damping rings are clearance fitted with the first annular groove.

According to at least one embodiment of the application, the damping rings have indentations.

According to at least one embodiment of the present application, the damping band has a second annular groove inside.

According to at least one embodiment of the application, the angle of the indentation in the circumferential direction is between 5 ° and 10 °.

according to at least one embodiment of the present application, the first annular groove is located near an end of the cantilevered ring that extends inside the stator inner ring.

On the other hand, the vibration damping ring is used in any vibration damping structure.

Drawings

FIG. 1 is a schematic structural diagram of a vibration damping structure provided in an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a vibration damping ring provided in an embodiment of the present application;

FIG. 3 is a schematic diagram of the vibration damping structure according to the embodiment of the present application;

Wherein:

1-stator blade; 2-stator inner ring; 3-rotor blades; 4-cantilever ring; 5-vibration damping ring.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

furthermore, it should be noted that, in the description of the present application, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

The present application is described in further detail below with reference to fig. 1 to 3.

a vibration damping structure comprising:

A stator blade 1;

A stator inner ring 2 arranged on the stator blade 1;

Rotor blades 3 adjacent to the stationary blades 1;

one end of the cantilever ring 4 is connected with the rotor blade 3, and the other end of the cantilever ring extends into the inner side of the stator inner ring 2 and is matched with the grate tooth honeycomb of the stator inner ring 2; the inner side of the cantilever ring 4 is provided with a first annular groove;

and the vibration damping ring 5 is arranged in the first annular groove.

for the vibration damping structure disclosed in the above embodiment, those skilled in the art can understand that the stator blade 1 and the rotor blade 3 are adjacent rotor blades in the air compression, inter-stage sealing is realized through the comb tooth honeycomb fit between the stator inner ring 2 and the cantilever ring 4, and the vibration damping ring 5 is arranged in the first annular groove formed in the inner side of the cantilever ring 4, so as to play a damping role and change the resonance frequency of the cantilever ring 4, thereby being capable of suppressing severe vibration of the cantilever ring 4 and related structures thereof and avoiding instability of related structures.

in some alternative embodiments, the damping rings 5 are clearance fitted with the first annular groove.

with regard to the vibration damping structure disclosed in the above embodiments, it can be understood by those skilled in the art that the vibration damping ring 5 is in clearance fit with the first annular groove, that is, the annular groove cannot restrict the rotation of the vibration damping ring 5 in the circumferential direction, the vibration damping ring 5 can rotate reciprocally in the circumferential direction in the first annular groove during the vibration of the cantilever ring 4, and generate uninterrupted touching friction with the cantilever ring 4, so as to consume the vibration energy of the cantilever ring 4, reduce the vibration stress, and further change the resonance frequency of the cantilever ring 4, thereby better suppressing the violent vibration of the cantilever ring 4 and the related structures.

In some alternative embodiments, the damping rings 5 have indentations.

with regard to the vibration damping and damping structure disclosed in the above embodiments, it can be understood by those skilled in the art that the opening of the vibration damping and damping ring 5 can facilitate the compression of the radial dimension thereof, so that the radial dimension thereof can be reduced, and thus the vibration damping and damping ring can be easily installed in the first annular groove, and the vibration damping and damping ring 5 can restore the radial dimension thereof to the state before the compression by virtue of the elastic force thereof in the first annular groove; on the other hand, the vibration reduction damping ring 5 has certain radial deformation capacity in the first annular groove, in the rotating process of the rotor blade 3, the vibration reduction damping ring 5 is expanded to generate positive pressure between the vibration reduction damping ring 5 and the cantilever ring 4 under the action of centrifugal force, load can be transmitted between the vibration reduction damping ring 5 and the cantilever ring 4 through friction, the vibration energy of the cantilever ring 4 is consumed, the vibration stress is reduced, the resonance frequency of the cantilever ring 4 is changed, and the good effect of inhibiting severe vibration of the cantilever ring 4 and relevant structures of the cantilever ring 4 is achieved.

In some alternative embodiments, the damping rings 5 have a second annular groove inside.

with regard to the vibration damping structure disclosed in the above embodiments, it can be understood by those skilled in the art that the second annular groove is formed in the vibration damping ring 5, on one hand, the second annular groove has a weight reduction function on the vibration damping ring 5, on the other hand, the deformation capability of the vibration damping ring 5 in the first annular groove can be enhanced, and in addition, the second annular groove is formed inside the vibration damping ring 5, so that the contact area of the vibration damping ring 5 and the cantilever ring 4 in contact friction is not affected.

in some alternative embodiments, the angle of the notch in the circumferential direction is between 5 ° and 10 °.

In some alternative embodiments, the first annular groove is located near the end of the cantilevered ring 4 that extends inside the stator inner ring 2.

With regard to the vibration damping structure disclosed in the above embodiments, it can be understood by those skilled in the art that the end of the cantilever ring 4 extending into the stator inner ring 2 is the most severe vibration part during the rotation of the rotor blade 3, and the first annular groove for disposing the vibration damping ring 5 is disposed at a position close to the end, so as to achieve a better vibration damping effect.

So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.