CN114293408A - Vibration absorbing device - Google Patents
Vibration absorbing device Download PDFInfo
- Publication number
- CN114293408A CN114293408A CN202210041922.1A CN202210041922A CN114293408A CN 114293408 A CN114293408 A CN 114293408A CN 202210041922 A CN202210041922 A CN 202210041922A CN 114293408 A CN114293408 A CN 114293408A
- Authority
- CN
- China
- Prior art keywords
- splicing
- black hole
- vibration
- main body
- mounting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Vibration Prevention Devices (AREA)
Abstract
The application provides a vibration absorbing device which comprises an installation seat and at least one dynamic vibration absorber, wherein a first sleeve cavity and at least one second sleeve cavity are formed on the installation seat, and the first sleeve cavity is sleeved on a structure to be damped; the natural frequency of the dynamic vibration absorber is matched with the fixed frequency of the structure to be damped, and the dynamic vibration absorber is made of metal materials; the dynamic vibration absorber comprises a main body part and a black hole part which are connected integrally, the second sleeve cavity is sleeved on the main body part and locked, the black hole part is gradually reduced along the power function in the direction away from the main body part along the section thickness in the vertical direction, and the main body part is the same as the maximum section thickness of the black hole part in the vertical direction. The utility model provides a inhale the device of shaking can be transmitted the dynamic vibration absorber by the structural elastic wave of damping fast through the mount pad, and the dynamic vibration absorber utilizes the black hole effect of acoustics simultaneously, has expanded the frequency range that the damping was fallen and is made an uproar, has improved the damping effect of making an uproar.
Description
Technical Field
The application belongs to the technical field of vibration control, and more specifically relates to a vibration absorbing device.
Background
At present, in order to achieve the purpose of vibration reduction and noise reduction, rail transit is mainly considered from 3 aspects of a vibration source, a propagation path and a vibration receiving body. Among them, the vibration source vibration damping and noise reduction technology is the main control measure and is the most effective, and the steel rail vibration damping and noise reduction technology is the most common vibration source control technology. The steel rail vibration control technology mainly adopts damping technology at the present stage, and mainly comprises damping steel rails and a steel rail dynamic vibration absorption device. Damping steel rail vibration noise in middle and high frequency band has good vibration damping and noise reducing effect, but has limited vibration damping and noise reducing effect for steel rail dominant frequency vibration needing to be controlled; although the steel rail dynamic vibration absorber can effectively control the main frequency vibration of a steel rail, the dynamic vibration absorber in the prior art can only effectively control the vibration of a vibration-damped structure near the natural frequency, and the vibration-damping and noise-reducing frequency range is narrow, so that the vibration-damping and noise-reducing effect is limited.
Disclosure of Invention
An object of the embodiment of the application is to provide a vibration absorbing device to solve the technical problem that the dynamic vibration absorbing device in the prior art has a narrow vibration absorbing and noise reducing frequency range and a limited vibration absorbing and noise reducing effect.
In order to achieve the above purpose, the embodiment of the present application adopts the following technical solutions: the vibration absorption device comprises a mounting seat and at least one dynamic vibration absorber, wherein a first sleeve cavity and at least one second sleeve cavity are formed on the mounting seat, and the first sleeve cavity is sleeved on a structure to be damped; the natural frequency of the dynamic vibration absorber is matched with the fixed frequency of the vibration-damped structure; the dynamic vibration absorber comprises a main body part and a black hole part which are integrally connected, the second cavity is sleeved on the main body part and locked, the section thickness of the black hole part along the vertical direction is gradually reduced and changed in a power function manner along the direction far away from the main body part, and the section thickness of the main body part along the vertical direction is the same as the maximum section thickness of the black hole part along the vertical direction.
The application provides a inhale device that shakes's beneficial effect lies in: compared with the prior art, the device of shaking absorption of this application embodiment passes through the setting of mount pad, and form first vestibule and second vestibule on the mount pad, first vestibule is used for entangling by the damping structure, the second vestibule is used for entangling dynamic vibration absorber and locking, thereby link together by damping structure and dynamic vibration absorber through the mount pad, and the mount pad becomes the vibration transmission bridge between by damping structure and the dynamic vibration absorber, by the structural elastic wave of damping can be via being transmitted to dynamic vibration absorber fast by the damping structure, and weaken by the dynamic vibration absorber. In addition, the dynamic vibration absorber of the application consists of a main body part and a black hole part, the main body part is sleeved and locked by the second sleeve cavity, the main body part is used for transmitting the vibration of the structure to be damped to the black hole part, the thickness of the section of the black hole part along the vertical direction is gradually reduced and changed along the direction far away from the main body part in a power function manner, and the natural frequency of the black hole part is matched with the natural frequency of the structure to be damped, and the black hole part can play a role in damping vibration only above the cut-off frequency, therefore, the broadband characteristic is provided, and due to the acoustic black hole effect, when the vibration wave propagates in the black hole part with the minimum thickness close to zero, the wave velocity of the vibration wave can be gradually reduced to approach zero, the vibration absorption device can gather the elastic waves above the cut-off frequency at a small thickness part and is dissipated by the additional damping material, so that the frequency range of vibration absorption and noise reduction is expanded, and the vibration absorption and noise reduction effect is improved.
In a possible design, the first sleeve cavity and the second sleeve cavity are arranged at intervals along a vertical direction, the first sleeve cavity and the second sleeve cavity penetrate through two opposite sides of the mounting seat along the first direction, the first direction is perpendicular to the vertical direction, and the main body part and the black hole part are integrally connected along the first direction.
In one possible design, the mount includes a first mount and a second mount; the first mounting piece and the second mounting piece are mutually spliced and locked along a second direction, and the first sleeve cavity is formed by splicing the first mounting piece and the second mounting piece;
the second direction is perpendicular to the first direction, and the second direction is perpendicular to the vertical direction.
In one possible design, the first mounting member includes a first splicing portion and a first reinforcing portion, and the second mounting member includes a second splicing portion, a second reinforcing portion and a first mounting portion; the first splicing part and the second splicing part are symmetrically arranged along the second direction at intervals, and a first opening is formed at one end of the first splicing part and one end of the second splicing part at intervals; the first reinforcing part extends from the other end of the first splicing part to the second splicing part, the second reinforcing part extends from the other end of the second splicing part to be connected with the first reinforcing part and locked, and the first splicing part, the second splicing part, the first reinforcing part and the second reinforcing part jointly enclose to form the first sleeve cavity; the first installation part is connected to one side of the second reinforcing part deviating from the first sleeve cavity, and the second sleeve cavity is formed in the first installation part.
In one possible design, the first mounting piece comprises a third splicing part, an extending part and a third reinforcing part, the second mounting piece comprises a fourth splicing part, a fourth reinforcing part and a second mounting part, the third splicing part and the fourth splicing part are symmetrically arranged along the second direction at intervals, and a second opening is formed at one end of the third splicing part and one end of the fourth splicing part at intervals; the extension part is connected to the other end of the third splicing part, the second mounting part extends to the extension part from the other end of the fourth splicing part, and the third splicing part, the fourth splicing part and the second mounting part are enclosed together to form the first sleeve cavity; the second sleeve cavity is formed in the second mounting part; the fourth reinforcing part is connected in the second installation department deviates from one side of first cover chamber, the third reinforcing part certainly the extension deviates from the one end of third concatenation portion to the fourth reinforcing part extend and with fourth reinforcing part butt and locking.
In one possible design, the thickness distribution of the mount in the first direction is uniform.
In one possible design, the vibration absorbing device comprises two dynamic vibration absorbers which are arranged at intervals in the vertical direction or are attached to each other;
and/or at least one dynamic vibration absorber distributed along a second direction is arranged in the second set of cavity; the total width of at least one of the dynamic vibration absorbers in the second direction is set to be adapted to the width of the structure to be damped in the second direction.
In one possible design, the power function is:
wherein ε and m are rational numbers, m is greater than or equal to 2, x represents the horizontal distance h (x) between a certain point in the black hole part 12 and the outer edge of the black hole part 12, x represents the vertical distance from the surface of the point to the perpendicular bisector of the black hole part 12, x represents the vertical distance between the surface of the point and the perpendicular bisector of the black hole part 120The extension distance, x, representing the minimum thickness1The horizontal distance h from the junction of the main body 11 and the black hole 12 to the outer edge of the black hole 120The minimum thickness of the black hole portion 12 is shown.
In one possible design, the dynamic vibration absorber includes two black hole portions, and the two black hole portions are respectively and symmetrically connected to two opposite sides of the main body portion; the black hole part is further connected with a damping piece, and the damping piece is made of a viscoelastic material.
In one possible design, the main body portion of at least one of the dynamic vibration absorbers is provided with a collision portion for colliding with other structures.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a first side view of a vibration absorbing apparatus according to an embodiment of the present invention mounted on a rail;
fig. 2 is a second side view of the vibration absorbing apparatus according to the embodiment of the present invention after being mounted on a steel rail;
fig. 3 is the dynamic vibration absorber of fig. 1;
fig. 4 is a schematic side view of the vibration absorbing apparatus of fig. 2;
fig. 5 is a schematic side view of a shock-absorbing device according to another embodiment of the present application, mounted on a rail;
fig. 6 is a schematic side view of the vibration absorbing apparatus of fig. 5;
fig. 7 is a schematic structural view of a dynamic vibration absorber of the vibration absorbing apparatus according to the embodiment of the present application, wherein the dynamic vibration absorber is provided with a collision portion;
fig. 8 is a schematic structural view of a dynamic vibration absorber of a vibration absorbing apparatus according to another embodiment of the present application, the dynamic vibration absorber being provided with a collision portion;
fig. 9 is a schematic diagram illustrating a functional relationship between a horizontal extension length and a thickness of a black hole portion according to an embodiment of the present disclosure.
Wherein, in the figures, the respective reference numerals:
100. a vibration absorbing device; 10. a dynamic vibration absorber; 11. a main body portion; 12. a black hole part; 121. a variable cross-section; 122. an extension section; 13. a damping member; 14. a local oscillator; 141. a flexible member; 142. a weight block; 15. a collision section; 20. a mounting seat; 21. a first mounting member; 211. a first splice; 212. a first reinforcing portion; 2120. a third locking hole; 213. a third splice; 214. an extension; 215. a third reinforcing portion; 2150. a fifth locking hole; 22. a second mount; 221. a second splice; 222. a second reinforcement portion; 2220. a fourth locking hole; 223. a first mounting portion; 2231. a second locking hole; 2232. a partition plate; 224. a fourth splice; 225. a fourth reinforcing portion; 2250. a sixth locking hole; 226. a second mounting portion; 2260. a seventh locking hole; 23. a first set of lumens; 24. a second set of lumens; 25. a first opening; 26. a second opening; 27. a first locking member; 29. a third locking member; 30. a fourth locking member; 31. a fifth locking member; 200. a damped structure.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Referring to fig. 1 and 2, a vibration absorbing apparatus 100 provided by the present application will now be described. The vibration absorbing apparatus 100 is used in conjunction with a structure 200 to be damped, and it should be noted that, in this application, the structure 200 to be damped may be a part of a car or a train or a track structure, or may be a rail or a track slab. The damped structure 200 in this embodiment refers to a rail in rail transit.
The vibration-absorbing device 100 includes a mounting base 20 and at least one dynamic vibration absorber 10, wherein the mounting base 20 is formed with a first housing 23 and at least one second housing 24. The first sleeve cavity 23 is used for being sleeved on the structure 200 to be damped, and the at least one second sleeve cavity 24 is respectively used for being sleeved on the at least one dynamic vibration absorber 10 and being locked.
Wherein, the outer contour of the part of the structure 200 to be damped sleeved by the first sleeve cavity 23 is matched with the inner contour of the corresponding part of the first sleeve cavity 23, so as to limit the structure 200 to be damped in the first sleeve cavity 23, and form a tight fixed connection between the structure 200 to be damped and the mounting seat 20. It is understood that in other embodiments of the present application, the damped structure 200 and the mounting seat 20 can be locked by the locking member after the first sleeve cavity 23 is sleeved on the damped structure 200.
The outer contour of the part of the dynamic vibration absorber 10 sleeved by the second sleeve cavity 24 is matched with the inner contour of the corresponding part of the second sleeve cavity 24, so that the dynamic vibration absorber 10 is limited in the second sleeve cavity 24, and the dynamic vibration absorber 10 is locked with the mounting seat 20 through the locking piece, so that the dynamic vibration absorber 10 is tightly and fixedly connected with the mounting seat 20.
It can be seen that by fastening at least one dynamic-vibration absorber 10 and the structure-to-be-damped 200 to the mounting seat 20 by locking, respectively, so as to connect the structure-to-be-damped 200 and the dynamic-vibration absorber 10 together by the mounting seat 20, the elastic waves on the structure-to-be-damped 200 can be quickly transmitted to the dynamic-vibration absorber 10 via the structure-to-be-damped 200 and are damped by the dynamic-vibration absorber 10.
Referring to fig. 2 and 3, the dynamic vibration absorber 10 includes a main body 11 and a black hole 12, and the main body 11 and the black hole 12 are integrally connected. The inner contour of the second sleeve cavity 24 is matched with the outer contour of the main body part 11, and the second sleeve cavity 24 is sleeved on the main body part 11 and locked, so that the main body part 11 is connected with the mounting seat 20. The main body 11 is used to absorb the vibration transmitted from the vibration-damped structure 200 to the mount 20, and transmit the vibration to the black hole 12 for the black hole 12 to absorb.
The sectional thickness of the black hole portion 12 in the vertical direction gradually decreases in a power function manner in a direction away from the main body portion 11, and the sectional thickness of the main body portion 11 in the vertical direction is the same as the maximum sectional thickness of the black hole portion 12 in the vertical direction.
The Acoustic Black Hole (ABH) effect utilizes the gradient change of the geometric parameter or the material characteristic parameter of a thin-wall structure, and the wave velocity of an elastic wave experiences a smooth and continuous drop when the elastic wave propagates in the thin-wall structure. Ideally, when the thickness of the edge of the thin-wall structure is reduced to zero, the wave speed in the thin-wall structure can be reduced to zero, and at the moment, the wave cannot be reflected. However, in practical applications, the thin-walled structure edge thickness never reaches zero, where the wave velocity still drops smoothly, but does not disappear. For the latter case, the thin-walled structure may be combined with a lossy medium (e.g., a viscoelastic layer) to significantly enhance the structural dissipation factor.
The section thickness of black hole portion 12 on the vertical direction of this application is the power function along the direction of keeping away from main part 11 and reduces the change gradually to can produce the black hole effect, if cooperate with the lossy medium on black hole portion 12, thereby can consume the vibration.
The natural frequency of the dynamic vibration absorber 10 is matched with the natural frequency of the structure 200 to be damped, and it should be noted that the matching of the natural frequency of the dynamic vibration absorber 10 with the natural frequency of the structure 200 to be damped means: the natural frequency of the dynamic vibration absorber 10 is the same as the natural frequency of the structure 200 to be damped, and the vibration of the structure 200 to be damped at the natural frequency can be reduced to the maximum extent. Specifically, the natural frequencies of the dynamic vibration absorber 10 can be matched by adjusting the material and the geometry of the two. It can be understood that the natural frequency matching can greatly reduce the movement of the structure 200 to be damped at the attachment point of the main body 11, and the vibration can be reduced to the maximum extent based on the dynamic vibration absorption principle, so as to achieve the best vibration and noise reduction effect.
The vibration absorbing device 100 provided by the embodiment of the application is arranged through the mounting base 20, and the first sleeve cavity 23 and the second sleeve cavity 24 are formed on the mounting base 20, the first sleeve cavity 23 is used for sleeving the structure 200 to be damped, the second sleeve cavity 24 is used for sleeving the dynamic vibration absorber 10 and locking, so that the structure 200 to be damped and the dynamic vibration absorber 10 are connected together through the mounting base 20, the mounting base 20 becomes a vibration transmission bridge between the structure 200 to be damped and the dynamic vibration absorber 10, elastic waves on the structure 200 to be damped can be quickly transmitted to the dynamic vibration absorber 10 through the structure 200 to be damped, and the absorption by the dynamic vibration absorber 10 is reduced. In addition, the dynamic vibration absorber 10 of the present application is composed of a main body portion 11 and a black hole portion 12, the main body portion 11 is sleeved and locked by a second sleeve 24, the main body portion 11 is used for transmitting the vibration of the structure 200 to be damped to the black hole portion 12, the thickness of the cross section of the black hole portion 12 in the vertical direction is gradually reduced and changed in a power function manner in the direction away from the main body portion 11, and the natural frequency of the dynamic vibration absorber 10 is matched with the natural frequency of the structure 200 to be damped, because the black hole portion 12 only needs to be above the cut-off frequency to play a vibration damping effect, the broadband characteristic is provided, and because of the acoustic black hole effect, when the vibration wave is transmitted in the black hole portion 12 with the minimum thickness close to zero, the wave speed of the vibration wave can be gradually reduced to zero, so that the dynamic vibration absorber 10 can gather the elastic wave above the cut-off frequency at the small thickness to be dissipated by additional damping material, the frequency range of vibration and noise reduction is expanded, and the vibration and noise reduction effect is improved.
In combination with the phononic crystal theory, the dynamic vibration absorber 10 can further widen the control range of the frequency band by using periodic materials or periodically arranging single materials or periodic materials.
In one embodiment, the vibration-absorbing apparatus 100 includes two dynamic-vibration absorbers 10, and the two dynamic-vibration absorbers 10 are spaced apart from each other in the vertical direction or attached to each other, so that the vibration-absorbing effect of the vibration-absorbing apparatus 100 is improved by the overlapped vibration absorption of the two dynamic-vibration absorbers 10. It is understood that in other embodiments of the present application, the number of the dynamic vibration absorbers 10 is determined according to the actual vibration and noise reduction requirements and the installation space, and may be, for example, one, three, four or more, and the dynamic vibration absorbers 10 may be stacked in sequence or separated in sequence by a partition plate.
In one embodiment, referring to fig. 2 and 4, the first set of cavities 23 and the second set of cavities 24 are disposed at intervals along the vertical direction, and both the first set of cavities 23 and the second set of cavities 24 penetrate through two opposite sides of the mounting base 20 along the first direction X. The first direction X is perpendicular to the vertical direction, in this embodiment, the first direction X specifically refers to a length extending direction of the steel rail, the main body portion 11 and the black hole portion 12 extend along the first direction X, and the main body portion 11 and the black hole portion 12 are integrally connected along the first direction X, the two black hole portions 12 are connected to two opposite sides of the main body portion 11 along the first direction X, respectively, and a cross-sectional thickness of the black hole portion 12 along the vertical direction varies in a power function manner along the first direction X, so that a certain position of the steel rail along the length extending direction thereof can be connected to the mounting seat 20, and an elastic wave at the position can be transmitted to the main body portion 11 through the mounting seat 20 and weakened along the length extending direction of the steel rail through the main body portion 11 and the black hole portions 12 at two opposite sides, and after the vibration absorbing devices 100 are uniformly distributed along the length extending direction of the steel rail, the elastic wave on the steel rail can be uniformly dispersed and weakened, while also enabling the shock-absorbing device 100 to be hidden under the rails to protect the shock-absorbing device 100. It is to be understood that, in other embodiments of the present application, when the external environment is better, the first direction X may also be a width extending direction of the steel rail, and is not particularly limited herein.
Specifically, two second sockets 24 are formed on the mounting base 20, and the two second sockets 24 are respectively used for mounting the main body portions 11 of the two dynamic vibration absorbers 10. Wherein, first cover cavity 23 is located the top of two second cover cavities 24, and the below of first cover cavity 23 is located in proper order to two second cover cavities 24 to make after the equipment, the rail is located the top of mount pad 20, and the below of rail is located in proper order to two dynamic vibration absorbers 10, thereby weakens the vibration of rail in proper order, with the effect of absorbing of assurance to rail vibration.
In one embodiment, referring to fig. 1, the thickness of the mounting seat 20 along the first direction X is uniformly distributed, that is, the thickness of each of the mounting seats 20 along the first direction X is equal, so as to facilitate the transmission of the vibration on the steel rail along the first direction X to the two main body portions 11 and the black hole portions 12 on both sides of the main body portion 11.
Referring to fig. 2, the inner wall of the first cavity 23 is fitted to the outer wall of the bottom end of the rail. The length of the main body portion 11 along the second direction Y is matched with the maximum length of the bottom end of the steel rail along the second direction Y, specifically, the length of the main body portion 11 along the second direction Y is equal to or close to the maximum length of the bottom end of the steel rail along the second direction Y, and the inner wall of the second sleeve cavity 24 is matched with the outer wall of the main body portion 11. This application is through length and the maximum length phase-match on the second direction Y of rail bottom edge along the second direction Y with main part 11 to make the rail along the vibration on the second direction Y can transfer to main part 11, thereby can weaken along first direction X. It is understood that in other embodiments of the present application, one, two or more than two dynamic-vibration absorbers 10 are installed in the second casing 24 and distributed along the second direction Y, that is, at least one dynamic-vibration absorber 10 is installed in the second casing 24 and distributed along the second direction Y, the total width of at least one dynamic-vibration absorber 10 along the second direction Y is set to be adapted by the width of the vibration damping structure 200 (e.g., the bottom end of the steel rail) along the second direction Y. In addition, when two or more dynamic vibration absorbers 10 are installed in the second casing 24 and distributed in the second direction Y, two adjacent dynamic vibration absorbers 10 may be separated by a partition plate or may not be separated by a partition plate.
In one embodiment, referring to fig. 4, the mounting base 20 includes a first mounting part 21 and a second mounting part 22, the first mounting part 21 and the second mounting part 22 are connected and locked to each other along the second direction Y, the first cavity 23 is formed by connecting the first mounting part 21 and the second mounting part 22, and the second cavity 24 is formed in the second mounting part 22. The second direction Y is perpendicular to the first direction X, and the second direction Y is perpendicular to the vertical direction. In practical application, the rail bottom is the fish tail form, consequently hardly overlaps first cover chamber 23 directly on the rail, this application is through dividing mount pad 20 into first installed part 21 and second installed part 22, then when carrying out the rail and being connected with mount pad 20, can follow second direction Y with first installed part 21 and second installed part 22 respectively to the rail bottom be close to and laminate rail locking, then with first installed part 21 and second installed part 22 locking, thereby realize being connected of rail and mount pad 20, and simple to operate.
In addition, because the size of the dynamic vibration absorber 10 is relatively small, the dynamic vibration absorber 10 can be directly inserted into the second sleeve cavity 24 along the first direction X, so the second sleeve cavity 24 is directly formed on the second installation part 22 without splicing the second sleeve cavity 24 together by the first installation part 21 and the second installation part 22, the dynamic vibration absorber 10 can be stably installed in the second sleeve cavity 24 by the arrangement, and the side face of the dynamic vibration absorber 10 can be abutted by a screw along the second direction Y after the installation. It is understood that, in other embodiments of the present application, the second set of cavities 24 may also be formed by splicing the first mounting part 21 and the second mounting part 22, or the second set of cavities 24 is formed in the first mounting part 21, which is not limited herein.
In one embodiment, referring to fig. 4, the first mounting member 21 includes a first splicing portion 211 and a first reinforcing portion 212, and the second mounting member 22 includes a second splicing portion 221, a second reinforcing portion 222 and a first mounting portion 223. The first splicing part 211 and the second splicing part 221 are symmetrically arranged along the second direction Y at intervals, and a first opening 25 is formed at one end of the first splicing part 211 and one end of the second splicing part 221 at intervals; the first reinforcing part 212 extends from the other end of the first splicing part 211 to the direction of the second splicing part 221, the second reinforcing part 222 extends from the other end of the second splicing part 221 to the direction of the first splicing part 211 to be connected and locked with the first reinforcing part 212, and the first splicing part 211, the second splicing part 221, the first reinforcing part 212 and the second reinforcing part 222 jointly enclose to form a first sleeve cavity 23; the first mounting portion 223 is connected to a side of the second reinforcement portion 222 facing away from the first pocket 23, and the second pocket 24 is formed in the first mounting portion 223. In this embodiment, since the vibration absorbing apparatus 100 includes two dynamic vibration absorbers 10, that is, two second sockets 24 are formed on the mount 20, three sockets are required to be formed on the mount 20 in total, and in order to ensure the structural strength of the mount 20, in this embodiment, the structural strength of the mount 20 is improved by providing the first reinforcing portion 212 and the second reinforcing portion 222 between the first socket 23 and the second socket 24 and by setting the structural dimensions of the first reinforcing portion 212 and the second reinforcing portion 222 to improve the structural strength of the first reinforcing portion 212 and the second reinforcing portion 222, and the portion of the mount 20 between the steel rail and the dynamic vibration absorbers 10 is not deformed.
Referring to fig. 4, the first mounting portion 223 has a second locking hole 2231, the first reinforcing portion 212 has a third locking hole 2120, and the second reinforcing portion 222 has a fourth locking hole 2220. In the installation process, referring to fig. 1 and 2, after the first mounting member 21 and the second mounting member 22 are respectively sleeved on the bottom end of the rail, the portion connected to the bottom end of the rail may extend from the first opening 25; the first and second reinforcing parts 212 and 222 are then locked by the first locking member 27 passing through the third and fourth locking holes 2120 and 2220, so that the first and second mounting parts 21 and 22 are locked to each other; after the dynamic-vibration absorber 10 is mounted in the second housing 24, the surface of the dynamic-vibration absorber 10 can be laterally abutted against the surface of the dynamic-vibration absorber 10 at the first mounting portion 223 through the second locking hole 2231 by the third locking member 29, thereby achieving locking of the dynamic-vibration absorber 10 on the mounting base 20.
Referring to fig. 4, since the two second cavities 24 are formed in the first mounting portion 223 connected to the second reinforcing portion 222, the length of the second reinforcing portion 222 along the second direction Y is greater than the length of the first reinforcing portion 212 along the second direction Y, so as to increase the structural strength of the second reinforcing portion 222 as much as possible. In addition, the first installation part 223 is not only respectively connected with the second reinforcing part 222 and the second splicing part 221, but also extends to the lower parts of the first reinforcing part 212 and the first splicing part 211 along the second direction Y, so that the size of the first installation part 223 along the second direction Y is increased, the structural strength of the first installation part 223 is increased, and the installation of the two dynamic vibration absorbers 10 on the first installation part 223 is facilitated.
In order to improve the structural strength of the first mounting member 21, the first splicing portion 211 and the first reinforcing portion 212 are an integral connection structure.
Similarly, in order to improve the structural strength of the second mounting member 22, the second splicing portion 221, the second reinforcing portion 222 and the first mounting portion 223 are all integrally connected.
Referring to fig. 4, a partition 2232 is provided in the first mounting portion 223, and the partition 2232 separates the two second chambers 24, thereby separating the two dynamic-force absorbers 10.
In one embodiment, the power function is:
wherein ε and m are rational numbers, m is greater than or equal to 2, x represents the horizontal distance h (x) between a certain point in the black hole part 12 and the outer edge of the black hole part 12, x represents the vertical distance from the surface of the point to the perpendicular bisector of the black hole part 12, x represents the vertical distance between the surface of the point and the perpendicular bisector of the black hole part 120The extension distance, x, representing the minimum thickness1The horizontal distance h from the junction of the main body 11 and the black hole 12 to the outer edge of the black hole 120The minimum thickness of the black hole portion 12 is shown.
As can be seen from the above power function, the black hole portion 12 includes a variable cross-section 121 and an extension section 122, and as shown in fig. 9, the cross-sectional thickness between the upper and lower surfaces of the variable cross-section 121 varies according to a second power function, so that the cross-sectional thickness between the upper and lower surfaces of the variable cross-section 121 gradually decreases in a direction away from the main body portion 11, so that the wave velocity of the elastic wave experiences a smooth and continuous decrease as the variable cross-section 121 propagates. The cross-sectional thickness between the upper and lower surfaces of the extension 122 varies according to a first power function, i.e., the cross-sectional thickness of the extension 122 is h0By connecting the extension section 122 to the end of the variable cross-section 121 far from the main body 11, on the one hand, the natural frequency of the dynamic vibration absorber 10 can be reduced, and on the other hand, the vibration waves propagating in the variable cross-section 121 can be further propagated into the extension section 122, which is more beneficial to the absorption and dissipation of the vibration waves by the black hole 12, and improves the vibration reduction and noise reduction effects.
In one embodiment, referring to fig. 2 and 3, the dynamic vibration absorber 10 includes two black hole portions 12, where the two black hole portions 12 are respectively and symmetrically connected to two opposite sides of the main body portion 11 along the first direction X, that is, two opposite sides of the main body portion 11 are respectively and sequentially connected to the variable cross-section 121 and the extension section 122. By providing the variable cross-section 121 and the extension section 122 in two, the main body 11 connects the two black hole parts 12, and the materials of the two black hole parts 12 may not be the same, so that each black hole part 12 can match different natural frequencies, and the vibration absorbing effect of the vibration absorbing apparatus 100 is further improved.
The thickness between the upper and lower surfaces of the main body 11 is constant along the first direction X, and the widths of the black hole 12 and the main body 11 along the second direction Y are the same, so that the elastic waves are uniformly transmitted in sequence through the main body 11 and the black hole 12.
Preferably, the main body 11 and the black hole 12 are integrally connected. It is understood that, in other embodiments of the present application, the main body portion 11 and the black hole portion 12 may be separately disposed and fixedly connected, for example, the main body portion 11 and the black hole portion 12 are connected by brazing.
In one embodiment, referring to fig. 2 and 3, the black hole 12 is further connected with a damping member 13, and the damping member 13 is made of a viscoelastic material. Specifically, the damping member 13 may be disposed in the black hole portion 12, for example, may be disposed in the variable section 121 and/or the extension section 122.
The dynamic vibration absorber 10 further includes a partial vibrator 14 attached to the extension 122, the partial vibrator 14 including a flexible member 141 and a weight 142, one end of the flexible member 141 being attached to the outer surface of the extension 122, and the weight 142 being attached to the other end of the flexible member 141. It can be understood that by connecting the local oscillator 14 to the extension 122, the elastic wave energy of the black hole 12 can be efficiently transferred to the local oscillator 14, thereby lowering the effective operating frequency of the black hole 12. It should be noted that the dynamic vibration absorber 10 may select whether or not to add the local vibrator 14 according to the actual vibration damping requirement.
In one embodiment, the main body portion 11 of at least one dynamic vibration absorber 10 is provided with a collision portion 15 for colliding with another structure. When the rail vibrates, the collision between the collision part 15 and the main body part 11 or the bottom of the rail shifts low-frequency vibration to high-frequency vibration, and the acoustic black holes absorb the vibration better.
Specifically, referring to fig. 7, in a preferred embodiment, two dynamic vibration absorbers 10 are mounted on the mounting seat 20 at intervals in the vertical direction, wherein the main body 11 of the dynamic vibration absorber 10 located above is provided with a collision portion 15, and the collision portion 15 collides with the main body 11, so that vibration can be better absorbed. In the first direction X, the collision portions 15 may be distributed on the main body portion 11 located on one side of the mounting seat 20, or the collision portions 15 may be distributed on the main body portion 11 located on the opposite sides of the mounting seat 20. Furthermore, the main body 11 may be provided with the collision portions 15 on two opposite sides in the vertical direction, for example, the collision portion 15 on the uppermost main body 11 may collide with the bottom end of the rail.
In another embodiment of the present application, referring to fig. 8, the collision portions 15 may be distributed on both of the opposing main body portions 11. In the first direction X, the collision portions 15 may be distributed on the main body portion 11 located on one side of the mounting seat 20, or the collision portions 15 may be distributed on the main body portion 11 located on the opposite sides of the mounting seat 20. Meanwhile, the two opposite sides of the main body 11 in the vertical direction may also be provided with the collision portions 15, for example, the collision portion 15 on the uppermost main body 11 may collide with the bottom end of the rail. In other embodiments, three or more dynamic vibration absorbers 10 may be provided in the mount 20 in the vertical direction, and similarly, the collision portion 15 may be provided in one main body portion 11 or in a plurality of main body portions 11, which is not particularly limited herein.
In another embodiment of the present application, referring to fig. 5 and 6, the first mounting element 21 includes a third splicing portion 213, an extending portion 214 and a third reinforcing portion 215, and the second mounting element 22 includes a fourth splicing portion 224, a fourth reinforcing portion 225 and a second mounting portion 226. The third splicing part 213 and the fourth splicing part 224 are arranged symmetrically and at intervals along the second direction Y, and a second opening 26 for allowing the part connected with the bottom end of the steel rail to pass through is formed at an interval between one end of the third splicing part 213 and one end of the fourth splicing part 224; the extending part 214 is connected to the other end of the third splicing part 213, the extending part 214 extends in the vertical direction, the second mounting part 226 extends from the other end of the fourth splicing part 224 to the extending part 214, and the third splicing part 213, the fourth splicing part 224 and the second mounting part 226 together enclose to form a first sleeve cavity 23; the second pocket 24 is formed in the second mounting portion 226. The fourth reinforcing portion 225 is connected to a side of the second mounting portion 226 away from the first sleeve cavity 23, the third reinforcing portion 215 extends from an end of the extension portion 214 away from the third splicing portion 213 to the fourth reinforcing portion 225, and the third reinforcing portion 215 abuts against and is locked to the fourth reinforcing portion 225. In the present embodiment, the third reinforcing portion 215 and the fourth reinforcing portion 225 are both provided below the first sleeve cavity 23 and the second sleeve cavity 24, and the structural strength of the entire mount 20 can be similarly improved.
The second casing 24 is formed in the second mounting portion 226, and one dynamic-vibration absorber 10 may be provided in the second casing 24, and two or more dynamic-vibration absorbers 10 may be provided in the second casing 24. When two or more dynamic-vibration absorbers 10 are provided in the second nest 24, two adjacent dynamic-vibration absorbers 10 are stacked in the second mounting portion 226 without a partition plate provided between the two adjacent dynamic-vibration absorbers 10, thereby making the vibration-transmitting effect of the two adjacent dynamic-vibration absorbers 10 better. It is to be understood that, in other embodiments of the present application, two adjacent dynamic-vibration absorbers 10 are provided in the second mounting portion 226 so as to be separated by a partition plate; in addition, two or more dynamic vibration absorbers 10 distributed in the second direction Y may be further disposed in the second mounting portion 226, wherein the dynamic vibration absorbers 10 distributed in the second direction Y may be disposed at intervals by a partition plate, or a partition plate may not be disposed, and is not particularly limited herein.
Since the second pockets 24 are each formed in the second mounting portion 226 connected to the fourth reinforcing portion 225, the length of the fourth reinforcing portion 225 in the second direction Y is greater than the length of the third reinforcing portion 215 in the second direction Y to increase the structural strength of the second reinforcing portion 222 as much as possible. After the rail is sleeved in the first sleeve cavity 23, the third reinforcing part 215 and the fourth reinforcing part 225 are locked by the fourth locking member 30, so that the first mounting member 21 and the second mounting member 22 are locked.
Specifically, the third reinforcing part 215 is provided with a fifth locking hole 2150, and the fourth reinforcing part 225 is provided with a sixth locking hole 2250, so that the fourth locking member 30 sequentially passes through the fifth locking hole 2150 and the sixth locking hole 2250 and is locked during installation.
In addition, the sidewall of the second mounting portion 226 is formed with a seventh locking hole 2260, so that the dynamic vibration absorber 10 can be installed in the second housing 24 and the dynamic vibration absorber 10 can be laterally locked by the fifth locking member 31 when the dynamic vibration absorber 10 is installed.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (10)
1. The vibration absorption device is characterized by comprising an installation seat and at least one dynamic vibration absorber, wherein a first sleeve cavity and at least one second sleeve cavity are formed on the installation seat, and the first sleeve cavity is sleeved on a structure to be damped; the natural frequency of the dynamic vibration absorber is matched with the fixed frequency of the vibration-damped structure; the dynamic vibration absorber comprises a main body part and a black hole part which are integrally connected, the second cavity is sleeved on the main body part and locked, the section thickness of the black hole part along the vertical direction is gradually reduced and changed in a power function manner along the direction far away from the main body part, and the section thickness of the main body part along the vertical direction is the same as the maximum section thickness of the black hole part along the vertical direction.
2. The vibration absorbing apparatus of claim 1 wherein said first housing and said second housing are spaced apart in a vertical direction, said first housing and said second housing each extending through opposite sides of said mount in a first direction, said first direction being perpendicular to said vertical direction, said body portion and said black hole portion being integrally connected in said first direction.
3. The vibration absorbing apparatus of claim 2 wherein said mounting base includes a first mounting member and a second mounting member; the first mounting piece and the second mounting piece are mutually spliced and locked along a second direction, and the first sleeve cavity is formed by splicing the first mounting piece and the second mounting piece;
the second direction is perpendicular to the first direction, and the second direction is perpendicular to the vertical direction.
4. The vibration absorbing apparatus of claim 3 wherein the first mounting member includes a first splice and a first reinforcement, and the second mounting member includes a second splice, a second reinforcement and a first mounting portion; the first splicing part and the second splicing part are symmetrically arranged along the second direction at intervals, and a first opening is formed at one end of the first splicing part and one end of the second splicing part at intervals; the first reinforcing part extends from the other end of the first splicing part to the second splicing part, the second reinforcing part extends from the other end of the second splicing part to be connected with the first reinforcing part and locked, and the first splicing part, the second splicing part, the first reinforcing part and the second reinforcing part jointly enclose to form the first sleeve cavity; the first installation part is connected to one side of the second reinforcing part deviating from the first sleeve cavity, and the second sleeve cavity is formed in the first installation part.
5. The vibration absorbing apparatus according to claim 3, wherein the first mounting member includes a third splicing portion, an extension portion and a third reinforcing portion, the second mounting member includes a fourth splicing portion, a fourth reinforcing portion and a second mounting portion, the third splicing portion and the fourth splicing portion are symmetrically arranged along the second direction and are spaced apart from each other, and a second opening is formed at an interval between one end of the third splicing portion and one end of the fourth splicing portion; the extension part is connected to the other end of the third splicing part, the second mounting part extends to the extension part from the other end of the fourth splicing part, and the third splicing part, the fourth splicing part and the second mounting part are enclosed together to form the first sleeve cavity; the second sleeve cavity is formed in the second mounting part; the fourth reinforcing part is connected in the second installation department deviates from one side of first cover chamber, the third reinforcing part certainly the extension deviates from the one end of third concatenation portion to the fourth reinforcing part extend and with fourth reinforcing part butt and locking.
6. The vibration absorbing apparatus of claim 2 wherein the thickness distribution of said mount in said first direction is uniform.
7. The vibration absorbing apparatus according to claim 1 wherein said vibration absorbing means comprises two of said dynamic-force vibration absorbers, said two dynamic-force vibration absorbers being disposed in a vertically spaced relationship or being attached to each other;
and/or at least one dynamic vibration absorber distributed along a second direction is arranged in the second set of cavity;
the total width of at least one of the dynamic vibration absorbers in the second direction is set to be adapted to the width of the structure to be damped in the second direction.
8. The vibration absorbing apparatus according to any one of claims 1 to 7, wherein said power function is:
wherein ε and m are rational numbers, m is greater than or equal to 2, x represents the horizontal distance h (x) between a certain point in the black hole part 12 and the outer edge of the black hole part 12, x represents the vertical distance from the surface of the point to the perpendicular bisector of the black hole part 12, x represents the vertical distance between the surface of the point and the perpendicular bisector of the black hole part 120The extension distance, x, representing the minimum thickness1The horizontal distance h from the junction of the main body 11 and the black hole 12 to the outer edge of the black hole 120The minimum thickness of the black hole portion 12 is shown.
9. The vibration absorbing apparatus according to any one of claims 1 to 7, wherein said dynamic vibration absorber includes two of said black hole portions, which are symmetrically connected to opposite sides of said main body portion, respectively; the black hole part is further connected with a damping piece, and the damping piece is made of a viscoelastic material.
10. The vibration absorbing apparatus according to claim 1, wherein said main body portion of at least one of said dynamic vibration absorbers is provided with a collision portion for collision with other structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041922.1A CN114293408A (en) | 2022-01-14 | 2022-01-14 | Vibration absorbing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041922.1A CN114293408A (en) | 2022-01-14 | 2022-01-14 | Vibration absorbing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114293408A true CN114293408A (en) | 2022-04-08 |
Family
ID=80977948
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210041922.1A Pending CN114293408A (en) | 2022-01-14 | 2022-01-14 | Vibration absorbing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114293408A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115418894A (en) * | 2022-08-03 | 2022-12-02 | 湖南九域同创高分子新材料有限责任公司 | Steel rail dynamic vibration absorber based on acoustic black hole and vibration reduction steel rail |
| CN116682401A (en) * | 2023-07-31 | 2023-09-01 | 南京理工大学 | Nested acoustic black hole beam structure |
-
2022
- 2022-01-14 CN CN202210041922.1A patent/CN114293408A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115418894A (en) * | 2022-08-03 | 2022-12-02 | 湖南九域同创高分子新材料有限责任公司 | Steel rail dynamic vibration absorber based on acoustic black hole and vibration reduction steel rail |
| CN116682401A (en) * | 2023-07-31 | 2023-09-01 | 南京理工大学 | Nested acoustic black hole beam structure |
| CN116682401B (en) * | 2023-07-31 | 2023-10-03 | 南京理工大学 | Nested acoustic black hole beam structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114293408A (en) | Vibration absorbing device | |
| US20210237394A1 (en) | Acoustic material structure and method for assembling same and acoustic radiation structure | |
| US5664397A (en) | Sandwich plate for use as motor-vehicle body part | |
| CN102748423A (en) | Periodic curved beam structure floating raft based on wave mode conversion | |
| CN112962361B (en) | Dynamic vibration absorber | |
| US20110211708A1 (en) | Simultaneous enhancement of transmission loss and absorption coefficient using activated cavities | |
| US20200234687A1 (en) | Soundproof structure body | |
| CN217460101U (en) | Vibration absorbing device | |
| JPH04353193A (en) | Pressure wave damping device in high speed train traveling pipe-like passage | |
| JP2005266399A (en) | Resonator type muffling structure | |
| JP5566848B2 (en) | Sound insulation structure and sound insulation cover | |
| CN110468981B (en) | Efficient sound insulation material for building wall and preparation method of sound insulation material | |
| CN115418894A (en) | Steel rail dynamic vibration absorber based on acoustic black hole and vibration reduction steel rail | |
| JP6780098B2 (en) | Rail car | |
| JP5661581B2 (en) | Sound insulation cover | |
| JP4027068B2 (en) | Sound absorbing material | |
| JP5816007B2 (en) | Sound absorbing material | |
| CN214656031U (en) | Broadband track damping vibration attenuation and noise reduction device | |
| CN110406554B (en) | Dust cover noise reduction structure and noise reduction method of rail train | |
| CN215518184U (en) | Dynamic vibration absorber | |
| WO2022110652A1 (en) | Battery tray, battery pack, and electric vehicle | |
| CN210426164U (en) | Totally-enclosed noise reduction system for air conditioner main unit of cooling tower | |
| JP4027069B2 (en) | Sound absorbing material | |
| RU2191716C2 (en) | Flying vehicle salon | |
| KR102618252B1 (en) | Device for reducing acoustic load |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |