CN114542844A - Pipeline dynamic vibration absorber - Google Patents

Abstract

The present application provides a pipe dynamic vibration absorber, pipe dynamic vibration absorber 10 includes: a pair of mounting snap rings 1 respectively located at both ends of the pipe dynamic vibration absorber 10 in the longitudinal direction; elastic members 2 connected to the pair of mounting clips 1 at both ends in the extending direction, respectively; and a mass 3 attached to the elastic member 2, wherein an attachment position of the mass 3 in an extending direction of the elastic member 2 can be adjusted. According to the application, the effective vibration absorption length can be increased, and the vibration absorption effect is improved.

Description

Pipeline dynamic vibration absorber

Technical Field

The application relates to the field of machinery, in particular to a pipeline dynamic vibration absorber for absorbing pipeline vibration.

Background

The main vibration source excitation of the screw refrigerating unit comes from the compressor. The oil injection pipeline, the liquid injection pipeline and the economizer return air pipeline which are directly connected with the compressor are greatly influenced by the excitation of the vibration source, the pipeline is in the condition of vibration too large for a long time, the joint of the pipeline connected with the compressor is not flexible, oil leakage can occur seriously, and normal operation of a unit is influenced. The reason that the pipeline vibrates excessively is usually caused by resonance between the natural frequency of the pipeline and the excitation frequency of the unit, and the method for reducing the pipeline vibration is to add a hoop on the pipeline, design a supporting structure and modify the pipeline structure to change the natural frequency of the pipeline so as to avoid the excitation frequency of the unit. However, the above method cannot be implemented due to limitations of actual installation conditions and aesthetic requirements of users.

As a passive Vibration reduction technology, the Dynamic Vibration Absorber (Dynamic Vibration Absorber) can effectively reduce the Vibration of the pipeline only by being arranged on the pipeline without changing the design and the arrangement of the pipeline. For example, patent document 1 (chinese patent application No. 201310392465.1) discloses a dynamic vibration absorber capable of achieving vibration damping of a pipe in the circumferential direction; patent document 2 (chinese patent application No. 201410161712.1) discloses a three-way dynamic vibration absorber capable of achieving vibration reduction in both the radial direction and the axial direction of a pipeline.

It should be noted that the above background description is only for the convenience of clear and complete description of the technical solutions of the present application and for the understanding of those skilled in the art. Such solutions are not considered to be known to the person skilled in the art merely because they have been set forth in the background section of the present application.

Disclosure of Invention

The inventors of the present application have found that the conventional dynamic vibration absorbers have certain limitations, for example, in patent document 1 and patent document 2: only one position is clamped with the pipeline, so that vibration absorption is only carried out at the clamped position, and the effective vibration absorption length is limited; the mass block is positioned at the tail end of the spring piece or the steel wire rope to form a cantilever structure, so that the stability of the dynamic vibration absorber is poor, and the vibration absorbing effect is influenced.

The embodiment of the application provides a pipeline dynamic vibration absorber, wherein, the both ends of elastomeric element are all installed in the pipeline through the installation snap ring, and the position of quality piece on elastomeric element's extending direction can be adjusted, from this: the pipeline dynamic vibration absorber can be clamped with a pipeline through two positions, and the pipeline between the two positions can be effectively vibrated, so that the effective vibration absorption length is increased; in addition, the stability of the elastic structure formed by the mass block and the elastic component is improved, so that the vibration absorption effect is improved.

According to an aspect of an embodiment of the present application, there is provided a pipe dynamic vibration absorber 10, including:

a pair of mounting snap rings 1 respectively located at both ends of the pipe dynamic vibration absorber 10 in the longitudinal direction;

elastic members 2 connected to the pair of mounting clips 1 at both ends in the extending direction, respectively; and

and a mass 3 attached to the elastic member 2, wherein an attachment position of the mass 3 in an extending direction of the elastic member 2 can be adjusted.

According to another aspect of an embodiment of the present application, wherein,

the pipe dynamic vibration absorber 10 further includes:

and the annular buffer cushion 9 is arranged on the inner wall of the mounting snap ring 1.

According to another aspect of the embodiment of the present application, the number of the elastic members 2 is 2 or more, and 2 or more of the elastic members 2 are arranged at intervals in the circumferential direction of the pair of mounting snap rings 1.

According to another aspect of the embodiment of the present application, the elastic member 2 is a plate spring having a bent structure in an extending direction.

According to another aspect of the embodiment of the present application, the elastic member 2 includes a first bevel-plate spring 21 and a second bevel-plate spring 23 in the extending direction,

the first bevel plate spring 21 is connected to one of a pair of mounting snap rings 1,

the second bevel plate spring 23 is connected to the other of the pair of mounting clasps 1,

the first and second bevel plate springs 21 and 23 are inclined with respect to the longitudinal direction.

According to another aspect of the embodiment of the present application, the elastic member 2 further includes, in the extending direction:

a flat plate spring leaf 22 connected between said first bevel plate spring leaf 21 and said second bevel plate spring leaf 23,

the planar plate spring 22 is parallel to the length direction.

According to another aspect of the embodiment of the present application, said elastic member 2 has a groove 24 arranged along said extension direction,

the groove 24 penetrates the elastic member 2 in the thickness direction,

the mass 3 is mounted to the elastic member 2 by mounting bolts 8,

the screw of the mounting bolt 8 passes through the groove in the thickness direction, and the head of the mounting bolt 8 presses the edge of the groove 24 in the thickness direction.

According to another aspect of the embodiment of the present application, the extension length of the groove on the first bevel plate spring 21 is different from the extension length on the second bevel plate spring 23.

According to another aspect of the embodiment of the present application, the first bevel plate spring 21 is inclined at an angle of 15 to 75 with respect to the longitudinal direction,

the angle at which the second inclined plane spring plate 23 is inclined with respect to the longitudinal direction is 15 ° to 75 °.

According to another aspect of the embodiment of the application, the ratio of the distance of the pair of mounting snap rings 1 in the length direction to the inner diameter of the mounting snap rings 1 is 1-5.

The beneficial effects of the embodiment of the application are that: the effective vibration absorption length is increased and the vibration absorption effect is improved.

Specific embodiments of the present application are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the application may be employed. It should be understood that the embodiments of the present application are not so limited in scope. The embodiments of the present application include many variations, modifications, and equivalents within the scope of the appended claims.

Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.

It should be emphasized that the term "comprises/comprising" when used herein, is taken to specify the presence of stated features, integers, steps or components but does not preclude the presence or addition of one or more other features, integers, steps or components.

Drawings

Elements and features described in one drawing or one implementation of an embodiment of the application may be combined with elements and features shown in one or more other drawings or implementations. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, and may be used to designate corresponding parts for use in more than one embodiment.

The accompanying drawings, which are included to provide a further understanding of the embodiments of the application, are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application. It is obvious that the drawings in the following description are only some embodiments of the application, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of the pipe dynamic vibration absorber of the present application;

fig. 2 is a schematic view of the elastic member of the present application.

Detailed Description

The foregoing and other features of the present application will become apparent from the following description, taken in conjunction with the accompanying drawings. In the description and drawings, particular embodiments of the application are disclosed in detail as being indicative of some of the embodiments in which the principles of the application may be employed, it being understood that the application is not limited to the embodiments described, but, on the contrary, is intended to cover all modifications, variations, and equivalents falling within the scope of the appended claims. Various embodiments of the present application will be described below with reference to the drawings. These embodiments are merely exemplary and are not intended to limit the present application.

In the embodiments of the present application, the terms "first", "second", and the like are used for distinguishing different elements by reference, but do not denote a spatial arrangement, a temporal order, or the like of the elements, and the elements should not be limited by the terms. The term "and/or" includes any and all combinations of one or more of the associated listed terms. The terms "comprising," "including," "having," and the like, refer to the presence of stated features, elements, components, and do not preclude the presence or addition of one or more other features, elements, components, and elements.

In the embodiments of the present application, the singular forms "a", "an", and the like include the plural forms and are to be construed broadly as "a" or "an" and not limited to the meaning of "a" or "an"; furthermore, the term "the" should be understood to include both the singular and the plural, unless the context clearly dictates otherwise. Further, the term "according to" should be understood as "at least partially according to … …," and the term "based on" should be understood as "based at least partially on … …," unless the context clearly dictates otherwise.

In addition, in the following description of the embodiments of the present application, for convenience of description, a direction of a center-connecting line of a pair of mounting collars or a direction parallel thereto is referred to as an "axial direction" or a "length direction"; the radial direction taking the central connecting line of the pair of mounting snap rings as the center is called as the radial direction; a side away from the connecting line in the radial direction is referred to as a "radially outer side", and a side close to the connecting line in the radial direction is referred to as a "radially inner side"; the direction around the center line of the pair of mounting collars is referred to as the "circumferential direction".

Example 1

The embodiment 1 of the application provides a pipeline dynamic vibration absorber.

Fig. 1 is a schematic view of a pipe-dynamic vibration absorber. As shown in fig. 1, the pipe dynamic vibration absorber 10 includes: a pair of mounting snap rings 1, an elastic member 2 and a mass 3.

The number of the mounting snap rings 1 is 2 (i.e., a pair), and each mounting snap ring 1 is annular. The line connecting the center points of the pair of mounting snap rings 1 is C, and the direction parallel to or along the line C is referred to as the axial direction or the longitudinal direction of the pipe dynamic vibration absorber 10.

As shown in fig. 1, a pair of mounting snap rings 1 are respectively located at both ends in the longitudinal direction of the pipe dynamic vibration absorber 10. The pair of mounting snap rings 1 are used to grip the outer circumference of the pipe 100, thereby mounting the pipe dynamic vibration absorber 10 to the pipe 100.

The elastic member 2 is connected to the pair of mounting clips 1 at both ends in the extending direction thereof.

The mass 3 is attached to the elastic member 2, and the attachment position of the mass 3 in the extending direction of the elastic member 2 can be adjusted.

According to the pipe dynamic vibration absorber of embodiment 1 of the present application, both ends of the elastic member can be attached to the pipe by installing the snap ring, and the position of the mass block in the extending direction of the elastic member can be adjusted, whereby: the pipeline dynamic vibration absorber can be clamped with a pipeline through two positions (namely, a pair of mounting snap rings), and the pipeline between the two positions can be effectively vibrated, so that the effective vibration absorption length is increased; and the elastic structure formed by the mass block and the elastic component is clamped with the pipeline through two positions, so that the stability of the elastic structure is improved, and the vibration absorption effect is improved.

In the present embodiment, the ratio of the distance of the pair of mounting snap rings 1 in the longitudinal direction to the inner diameter of the mounting snap rings 1 is 1 to 5, and thus the effective vibration absorption length of the pipe dynamic vibration absorber 10 is large.

As shown in fig. 1, each mounting clip 1 may include a first clip 11 and a second clip 12, and the first clip 11 and the second clip 12 may be semi-annular, and they are connected together by a first bolt 4 and a first nut 5. The inner radius of each mounting snap ring 1 may be 1mm-2mm larger than the radius of the pipeline 100.

As shown in fig. 1, the pipe dynamic vibration absorber 10 may further include: a ring-shaped cushion pad 9. The ring-shaped cushion pad 9 may be provided on an inner wall of the installation snap ring 1, that is, the installation snap ring 1 may sandwich an outer circumference of the pipe 100 via the ring-shaped cushion pad 9. The annular buffer cushion 9 can not only make the clamping between the mounting snap ring 1 and the pipeline 100 more stable, but also increase the damping of the pipeline dynamic vibration absorber 100 and increase the bandwidth of the vibration absorption frequency of the pipeline, thereby adapting to the fluctuation of the vibration frequency of the pipeline.

In one embodiment, the annular cushion 9 may be a rubber pad, for example, a vulcanized rubber pad. The radial dimension of the annular cushion 9 is 1.5mm-2.5 mm.

In the present embodiment, the number of the elastic members 2 is 1 or 2 or more, for example, 2 to 8. Here, when the number of the elastic members 2 is 2 or more, the 2 or more elastic members 2 may be disposed at intervals in the circumferential direction of the pair of mounting snap rings 1, that is, the 2 or more elastic members 2 may be distributed in the circumferential direction of the connecting line C, for example, the 2 or more elastic members 2 may be disposed uniformly in the circumferential direction of the pair of mounting snap rings 1 (that is, the 2 or more elastic members 2 may be distributed uniformly in the circumferential direction of the connecting line C), whereby the vibration absorbing effect can be improved.

As shown in fig. 1, the elastic member 2 may be mounted on the mounting collar 1 at both ends by a second mounting bolt 6 and a second mounting nut 7. For example, the mounting collar 1 has a flange portion 13 extending radially outward, the flange portion 13 has a first mounting hole (not shown), the end portion of the elastic member 2 has a mounting portion 20 (shown in fig. 2) parallel to the flange portion 13, the mounting portion 20 has a second mounting hole 201 (shown in fig. 2), and the screw of the second mounting bolt 6 passes through the first and second mounting holes 201 (shown in fig. 2) and then is fastened to the second mounting nut 7, thereby mounting the elastic member 2 on the mounting collar 1.

Fig. 2 is a schematic view of the elastic member. As shown in fig. 2, the elastic member 2 may be a plate spring having a bent structure in an extending direction thereof, whereby the bent structure can provide elasticity by being deformed.

The thickness, width and number of the elastic member 2 are related to the vibration absorbing frequency, for example, the thickness H of the elastic member 2 is 0.5-1.5mm and the width W is 15-30mm, wherein the thickness H and width W of the elastic member 2 are illustrated in fig. 1.

As shown in fig. 1 and 2, the elastic member 2 includes a first bevel-plate spring piece 21 and a second bevel-plate spring piece 23 in the extending direction. Wherein the first inclined plane plate spring leaf 21 is connected with one of the pair of mounting snap rings 1, and the second inclined plane plate spring leaf 23 is connected with the other of the pair of mounting snap rings 1.

The first and second inclined plane plate reeds 21 and 23 are inclined with respect to the connecting line C, for example, the angle at which the first inclined plane plate reed 21 is inclined with respect to the connecting line C is 15 to 75 °, and the angle at which the second inclined plane plate reed 23 is inclined with respect to the connecting line C is 15 to 75 °. Thus, the radial dimension of the pipe dynamic vibration absorber 10 can be reduced as much as possible while the first and second slope plate springs 21 and 23 have a certain elasticity.

The angle at which the first bevel-plate spring 21 is inclined with respect to the connecting line C and the angle at which the second bevel-plate spring 23 is inclined with respect to the connecting line C may be the same or different. Further, the extension lengths of the first and second bevel- plate reeds 21 and 23 may be the same or different.

As shown in fig. 2, the elastic member 2 further includes, in the extending direction: a flat plate spring 22. The flat panel spring 22 is attached between the first bevel panel spring 21 and the second bevel panel spring 23. The planar plate spring 22 is parallel to the connecting line C (i.e., the length direction). The length of the flat plate spring leaf 22 can be 20-50 mm, and the vibration absorption frequency can be adjusted by setting the length of the flat plate spring leaf 22.

As shown in fig. 1 and 2, the elastic member 2 has a groove 24 provided along the extending direction. The groove 24 penetrates the elastic member 2 in the thickness direction.

The grooves 24 may be used for mounting the mass 3 and for guiding the sliding of the mass 3, adjusting the position of the mass 3 in the extension direction of the elastic part 2, and thereby adjusting the vibration absorbing frequency of the dynamic vibration absorber 10. For example, as shown in fig. 1, the mass 3 is attached to the elastic member 2 by the third mounting bolt 8, wherein the screw of the third mounting bolt 8 passes through the groove 24 in the thickness direction and enters the screw hole (not shown) of the mass 3, and the head of the third mounting bolt 8 presses the edge of the groove 24 in the thickness direction, whereby the elastic member 2 is sandwiched by the heads of the mass 3 and the third mounting bolt 8 from both sides in the thickness direction, and the mass 3 is attached to the elastic member 2; furthermore, when it is necessary to adjust the position of the mass 3 in the extending direction of the elastic member 2, the third mounting bolt 8 may be loosened, the mass 3 adjusted to a new position, and then the third mounting bolt 8 may be tightened again.

In the present embodiment, the width of the groove 24 may be 0.5 to 1mm larger than the outer diameter of the screw of the third mounting bolt 8, for example, the width of the groove 24 is 5 to 7mm, thereby facilitating the screw of the third mounting bolt 8 to run through the groove 24. Further, the width of the groove 24 is smaller than the outer diameter of the head of the third mounting bolt 8.

As shown in fig. 1 and 2, the elastic member 2 may have two parallel grooves 24 juxtaposed in the width direction, and the mass block 3 may be mounted to the elastic member 2 by two third mounting bolts 8, the screws of the two third mounting bolts 8 penetrating different grooves 24, respectively. Thereby, the mass block 3 can be stably and firmly supported.

Further, the present embodiment may not be limited to this, and for example, the elastic member 2 may have only one groove 24, or the elastic member 2 may have three or more grooves 24 juxtaposed in the width direction.

In the present embodiment, the extension length of the groove 24 on the first slope sheet spring 21 is different from the extension length of the groove 24 on the second slope sheet spring 23, whereby the elastic rigidities of the first slope sheet spring 21 and the second slope sheet spring 23 are made different, thereby further increasing the vibration absorbing frequency range of the dynamic vibration absorber 10 for the piping.

In the embodiment, the mass of the mass block 3 may be 30-80 g, and the specific mass may be determined according to the vibration absorption frequency and the mass ratio of the dynamic vibration absorber to the pipeline. In addition, when the number of the elastic members 2 is two or more, one mass block 3 may be mounted on each elastic member 2, and the masses of the different mass blocks 3 may be equal or different.

As shown in fig. 1, the mass 3 may be mounted on a flat plate spring 22, and thus, a multiple degree of freedom system may be composed of the first inclined plate spring 21, the mass 3, and the second inclined plate spring 23, thereby improving the shock absorbing effect. Further, the present embodiment may not be limited thereto, and the mass 3 may be adjusted to the first bevel plate spring 21 or the second bevel plate spring 23 as necessary.

According to the embodiment of the application, the dynamic vibration absorber 10 comprises a pair of installation clamping rings 1, an elastic part 2 and a mass block 3, so that the vibration absorption area on a pipeline can be effectively increased, and the vibration absorption effect is improved; in addition, the elastic member 2 is connected at both ends thereof to the pair of annular clips 1, respectively, so that the stability of the dynamic vibration absorber 10 can be improved.

Compared with the prior art, the dynamic vibration absorber 10 of the embodiment of the present application has the following advantages:

1. the structure is more compact. The radial space of the pipeline occupied by the dynamic vibration absorber 10 is only 1.5-2.5 times of the diameter of the pipeline. Because the screw refrigerating unit develops towards the direction of high cooling capacity and low space occupation in the future, the arrangement design of the pipeline is more compact, and the conventional pipeline dynamic vibration absorber has larger volume and can generate installation interference on structural members in the pipeline path range.

2. The adjustable range of the vibration absorption frequency is wider. In this application, the position can be adjusted in the extending direction of elastic unit 2 to quality piece 3, and consequently, the scope that quality piece 3 removed is wider to make the frequency of inhaling adjusting range wider, not only be applicable to the pipeline that receives the frequency conversion excitation, be applicable to moreover because of the manufacturing difference arouses the frequency of inhaling of resonant frequency change pipeline and inhale the on-the-spot self-adaptation regulation of frequency.

3. The effective vibration absorption length of the pipeline is longer. This application adopts a pair of installation snap ring 1 to fix pipeline and dynamic vibration absorber 10, compares with the condition that dynamic vibration absorber only a department position and pipeline joint among the prior art, in this application to the position of two departments and pipeline clamping and give the pipeline between the two places all can realize inhaling the vibration, and effective vibration absorption length is bigger.

4. The stability is better. Because most of the existing pipeline dynamic vibration absorbers adopt cantilever arrangement for the mass unit, the mass unit is positioned at the tail end of the spring piece, the vibration amplitude of the mass unit is very large while absorbing vibration, long-term cantilever vibration can loosen a bolt connected with the spring piece and the annular clamping, and the dynamic vibration absorbers can fail or the vibration absorption frequency can be changed seriously, so that the effect of absorbing vibration of a pipeline cannot be achieved; and the both ends of the elastic unit of this application all are connected with installation snap ring 1, consequently can improve the stability when the dynamic vibration absorber takes place to resonate greatly.

5. The three-dimensional vibration absorption effect is better. The mass block 3 can form a double-freedom-degree system with the plate spring pieces on two sides, and the mass block 3 can be moved to different positions on the plate spring pieces to form a dynamic vibration absorber with multiple degrees of freedom, so that the three-way vibration absorbing function is realized. Meanwhile, the position of the mass block can be adjusted according to the freedom degree direction of the vibration source when the pipeline actually resonates, so that the vibration of the pipeline in a specific direction can be restrained in a targeted manner, and the vibration absorption effect is better.

Next, a method of determining each parameter of the dynamic vibration absorber 10 will be described as an example.

Firstly, a pipeline 100 of the unit is subjected to a test hammering method or modal simulation in an ANSYS workbench, for example, the first 5 th order natural frequency of the pipeline 100 is 26.02Hz, 36.1Hz, 50.1Hz, 62.7Hz and 84 Hz. The excitation frequency of the vibration source (e.g., compressor vibration source) associated with the circuit 100 is then analytically calculated to be in the range of 25-60Hz, thereby determining the frequencies 26.02Hz, 36.1Hz, and 50.1Hz at which the circuit 100 requires vibration damping.

In the case of a dynamic vibration absorber 10 having 4 elastic members 2 and mass blocks 3, 4 mass blocks 3 having different masses are selected to be mounted on each elastic member 2, and by moving the positions of the mass blocks 3 on the elastic members 2, the natural frequency of the structure of 4 mass blocks 3-elastic members 2 is made to be close to the frequency of the pipeline 100 to be damped. Because an additional mass is added to the pipeline 100 after the snap ring 1 is installed on the pipeline 100, the natural frequency of each mass block 3-elastic part 2 structure is slightly lower than the frequency needing vibration reduction by about 0.5-2 Hz. According to the natural frequency of each structure of the mass block 3 and the elastic component 2 determined above, parameters such as the thickness, the width, the groove width and the like of the plate spring piece serving as the elastic component 2, the specific mass size of the mass block 3 and the specific position on the elastic component 2 are determined.

For example, in the case where the dynamic vibration absorber 10 of the present application is mounted on the pipe 100, the maximum vibration displacement of the pipe 100 is reduced from 336.1um to 53.2um, and the vibration absorbing effect of the dynamic vibration absorber 10 is significant.

While the invention has been described with reference to specific embodiments, it will be apparent to those skilled in the art that these descriptions are illustrative and not intended to limit the scope of the invention. Various modifications and adaptations of the present invention may occur to those skilled in the art, based on the principles of the present invention, and such modifications and adaptations are within the scope of the present invention.

Claims (10)

1. A pipe dynamic vibration absorber, characterized in that the pipe dynamic vibration absorber (10) comprises:

a pair of mounting snap rings (1) respectively located at both ends of the pipe dynamic vibration absorber (10) in the length direction;

elastic members (2) connected to the pair of mounting clips (1) at both ends in the extending direction; and

and a mass (3) attached to the elastic member (2), wherein the attachment position of the mass (3) in the extending direction of the elastic member (2) can be adjusted.

2. The pipe dynamic vibration absorber of claim 1,

the pipe dynamic vibration absorber (10) further comprises:

and the annular buffer cushion (9) is arranged on the inner wall of the mounting snap ring (1).

3. The pipe dynamic vibration absorber of claim 1,

the number of the elastic parts (2) is more than 2, and the elastic parts (2) are arranged on the circumferential direction of the pair of mounting snap rings (1) at intervals.

4. The pipe dynamic vibration absorber of claim 1,

the elastic component (2) is a plate spring which is provided with a bending structure in the extending direction.

5. The pipe dynamic vibration absorber of claim 4,

the elastic member (2) includes a first bevel plate spring (21) and a second bevel plate spring (23) in the extending direction,

the first inclined plane plate spring leaf (21) is connected with one of the pair of mounting snap rings (1),

the second inclined plane plate spring leaf (23) is connected with the other one of the pair of mounting snap rings (1),

the first and second bevel plate reeds (21, 23) are inclined with respect to the longitudinal direction.

6. The pipe dynamic vibration absorber of claim 5,

the elastic member (2) further includes, in the extending direction:

a flat plate spring (22) connected between the first bevel plate spring (21) and the second bevel plate spring (23),

the planar plate spring (22) is parallel to the length direction.

7. The pipe dynamic vibration absorber of claim 5,

the elastic part (2) has a groove (24) arranged in the direction of extension,

the groove (24) penetrates the elastic member (2) in the thickness direction,

the mass block (3) is mounted on the elastic component (2) through a mounting bolt (8),

the screw of the mounting bolt (8) passes through the groove (24) along the thickness direction, and the head of the mounting bolt (8) presses the edge of the groove (24) in the thickness direction.

8. The pipe dynamic vibration absorber of claim 7,

the extension of the groove (24) on the first ramp sheet spring (21) is different from the extension on the second ramp sheet spring (23).

9. The pipe dynamic vibration absorber of claim 5,

the first inclined plane plate spring leaf (21) is inclined at an angle of 15-75 degrees relative to the length direction,

the second inclined plane spring plate (23) is inclined at an angle of 15 to 75 degrees with respect to the longitudinal direction.

10. The pipe dynamic vibration absorber of claim 1,

the ratio of the distance of the pair of mounting snap rings (1) in the length direction to the inner diameter of the mounting snap rings (1) is 1-5.

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