CN216193689U - Resonant vibration-damping fastener - Google Patents
Resonant vibration-damping fastener Download PDFInfo
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- CN216193689U CN216193689U CN202122754147.8U CN202122754147U CN216193689U CN 216193689 U CN216193689 U CN 216193689U CN 202122754147 U CN202122754147 U CN 202122754147U CN 216193689 U CN216193689 U CN 216193689U
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Abstract
The utility model provides a resonant vibration-damping fastener, which comprises an upper base plate, a middle base plate and an anchoring bolt, wherein a steel rail is arranged on the upper base plate, a rail lower pad is arranged between the upper base plate and the steel rail, and the anchoring bolt sequentially penetrates through the upper base plate, the plate lower pad, the middle base plate and an elastic pad to fix the fastener on a track bed; set up first quality piece on the upper plate and hold the chamber, set up first resonance quality piece and first sound absorption cotton in first quality piece holds the intracavity, first quality piece holds the chamber and sets up to the horn mouth form, and the opening diameter of first quality piece holds the chamber lower extreme is greater than the opening diameter of first quality piece holds the chamber upper end. Compared with the prior art, the resonant vibration-damping fastener has the advantages that the first mass block accommodating cavity is in the shape of the horn mouth, sound can be fully and quickly absorbed into the first mass block accommodating cavity due to the horn mouth, and noise is absorbed by the first sound-absorbing cotton in the first mass block accommodating cavity.
Description
Technical Field
The utility model relates to the field of urban rail transit, in particular to a resonant vibration-damping fastener.
Background
In recent years, urban rail transit systems such as domestic subways and light rails are developed rapidly, and the tension situation of urban traffic is effectively relieved. In this series of construction, the fastener system is indispensable, and the fastener is the connecting piece of rail and sleeper, realizes being connected with the rail through the mode of bullet strip withholding the rail, realizes being connected with the sleeper through the mode of anchor bolt fastening. In the urban rail transit industry, the damping fastener is the largest rail damping product of quantity of use at present.
The patent of prior art application No. CN201810235699.8 discloses a resonance type vibration damping fastener, as shown in fig. 1, which comprises a base plate, an anchor bolt, a steel rail mounted on the base plate; a rail lower pad is arranged between the bottom plate and the steel rail, and a plate lower pad is arranged on the lower side of the bottom plate; the anchoring bolt penetrates through the bottom plate and the lower plate pad to fix the fastener on the road bed; the bottom plate is provided with an accommodating part which is positioned below the steel rail; a resonance mass block is installed in the accommodating part, and an elastic component is arranged between the resonance mass block and the bottom plate. Although a resonant system consisting of a resonant mass block and an elastic component is introduced in the patent, the resonant fastener can further absorb the vibration energy of the steel rail on the basis of isolating the vibration and the impact of the train, thereby reducing the vibration and the noise radiation of the steel rail and reducing the phenomenon of the wave abrasion of the steel rail, but the absorption of the vibration noise of the steel rail is limited.
In view of the above, the present invention is particularly proposed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a resonant vibration-damping fastener to solve the problem that the vibration noise of a steel rail is limited in the prior art.
In order to achieve the purpose, the technical scheme of the utility model is realized as follows:
a resonant vibration-damping fastener comprises an upper base plate, an intermediate base plate and an anchoring bolt, wherein a steel rail is installed on the upper base plate, a rail lower pad is arranged between the upper base plate and the steel rail, and the anchoring bolt sequentially penetrates through the upper base plate, the plate lower pad, the intermediate base plate and an elastic pad to fix the fastener on a ballast bed; the upper base plate is provided with a first mass block containing cavity, a first resonant mass block and first sound absorption cotton are arranged in the first mass block containing cavity, the first mass block containing cavity is in a horn mouth shape, and the diameter of an opening at the lower end of the first mass block containing cavity is larger than that of an opening at the upper end of the first mass block containing cavity.
According to the resonant vibration-damping fastener, the first mass block accommodating cavity is in the shape of the horn mouth, sound can be fully and quickly absorbed into the first mass block accommodating cavity conveniently due to the shape of the horn mouth, and noise is absorbed by the first sound-absorbing cotton in the first mass block accommodating cavity; a first-level resonance system is formed by the first resonance mass block, the plate lower pad and the rail lower pad together, when the steel rail vibrates under a specific frequency band, the first-level resonance system can generate reverse resonance to absorb vibration energy of the steel rail, so that vibration and noise radiation of the steel rail are reduced, and wave abrasion of the steel rail is reduced.
Furthermore, a second mass block containing cavity is arranged on the middle base plate, and a second resonant mass block and second sound absorbing cotton are arranged in the second mass block containing cavity.
The second mass block accommodating cavity is arranged to facilitate sound to be fully and quickly absorbed into the second mass block accommodating cavity, so that the second sound-absorbing cotton is convenient to absorb more vibration noise of the steel rail; the second resonance mass block, the lower plate pad and the elastic pad jointly form a secondary resonance system, when the steel rail vibrates in a specific frequency band, the secondary resonance system can generate reverse resonance to absorb the vibration energy of the steel rail, so that the vibration and noise radiation of the steel rail are further reduced, and the wave abrasion phenomenon of the steel rail is further reduced.
Furthermore, the second mass block accommodating cavity is in a horn mouth shape, and the diameter of an opening at the lower end of the second mass block accommodating cavity is larger than that of an opening at the upper end of the first mass block accommodating cavity.
The second quality piece holds the chamber and sets up to the horn mouth form, and the horn mouth form does benefit to the abundant quick absorption of sound and enters into the second quality piece and holds the intracavity, and the noise is held the second of intracavity by the second quality piece and is inhaled the sound cotton and absorb.
Further, the position of the second mass block accommodating cavity corresponds to the position of the first mass block accommodating cavity.
The arrangement is that the first mass block accommodating cavity and the second mass block accommodating cavity can be butted together, and sound is enabled to be completely transmitted along the two-stage mass block accommodating cavities when being transmitted from the first mass block accommodating cavity to the second mass block accommodating cavity.
Further, the opening diameter of the lower end of the first mass block accommodating cavity is smaller than the opening diameter of the upper end of the second mass block accommodating cavity.
Further, the diameter of an opening at the lower end of the first mass accommodating cavity is equal to the diameter of an opening at the upper end of the second mass accommodating cavity.
Furthermore, one or more mutually independent first mass block accommodating cavities are arranged on the upper base plate, and the number of the second mass block accommodating cavities is equal to that of the first mass block accommodating cavities.
Furthermore, a first sound absorbing cotton is arranged between the first resonance mass block and the upper base plate, and a second sound absorbing cotton is arranged between the second resonance mass block and the middle base plate.
Further, the thickness of the first resonant mass block is the same as that of the upper base plate, and the thickness of the second resonant mass block is the same as that of the middle base plate.
Further, the fastener comprises a lower base plate, and the lower base plate is arranged below the elastic pad.
Compared with the prior art, the resonant vibration-damping fastener provided by the utility model has the following beneficial effects:
1) according to the resonant vibration-damping fastener, the first mass block accommodating cavity is in the shape of the horn mouth, sound can be fully and quickly absorbed into the first mass block accommodating cavity due to the horn mouth, and noise is absorbed by the first sound absorption cotton in the first mass block accommodating cavity.
2) According to the resonant vibration-damping fastener, the second mass block accommodating cavity is in the shape of the horn mouth, sound can be fully and quickly absorbed into the second mass block accommodating cavity conveniently due to the shape of the horn mouth, and noise is absorbed by the second sound-absorbing cotton in the second mass block accommodating cavity.
3) The resonant vibration-damping fastener comprises a first resonant mass block, a plate lower pad and a rail lower pad which form a primary resonant system, and a second resonant mass block, the plate lower pad and an elastic pad which form a secondary resonant system, wherein the natural frequency of the secondary resonant system is consistent with certain characteristic frequencies of a steel rail. According to the principle of the dynamic vibration absorber, when the steel rail vibrates in a specific frequency band, the resonance mass block, the under-plate pad and the under-rail pad form a resonance system which can generate reverse resonance to absorb the vibration energy of the steel rail, so that the vibration and noise radiation of the steel rail are reduced, and the wave abrasion phenomenon of the steel rail is reduced.
Drawings
To further clarify the structure and connection between the various components of the present invention, the following reference numerals are given and described.
Fig. 1 is a schematic structural diagram of a resonant vibration damping fastener in the prior art;
fig. 2 is a schematic side sectional view of a resonant vibration damping fastener according to an embodiment of the present invention.
Description of reference numerals:
1. an upper base plate; 2. a plate under pad; 3. a middle base plate; 4. a pad under the rail; 5. an anchor bolt; 6. a spring bar; 7. a resonant mass block; 71. a first resonant mass; 72. a second resonant mass; 8. an elastic member; 81. a first sound absorbing cotton; 82. the second sound-absorbing cotton; 9. an elastic pad; 10. a lower base plate; 11. a first mass accommodating chamber; 12. a second mass receiving cavity.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The descriptions of "first", "second", etc. mentioned in the embodiments of the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1
In the prior art, as shown in fig. 1, a resonance type vibration damping fastener comprises an upper base plate 1, an intermediate base plate 3 and anchor bolts 5, wherein steel rails are mounted on the upper base plate 1; a rail lower pad 4 is arranged between the upper base plate 1 and the steel rail, the rail lower pad 4 is arranged between the upper base plate 1 and the steel rail, and the anchoring bolt 5 sequentially penetrates through the upper base plate 1, the plate lower pad 2, the middle base plate 3 and the elastic pad 9 to fix the fastener on a track bed; the upper bottom plate 1 is provided with an elastic strip 6, and the elastic strip 6 fixes the steel rail through a gauge block. A resonance mass block 7 is mounted on the upper base plate 1, and an elastic member 8 is arranged between the resonance mass block 7 and the upper base plate 1.
In order to further absorb the vibration energy and noise of the steel rail, the present embodiment provides a resonance type vibration damping fastener, as shown in fig. 2, the resonance type vibration damping fastener includes an upper base plate 1, an intermediate base plate 3, and an anchor bolt 5, the steel rail is mounted on the upper base plate 1, and the anchor bolt 5 sequentially penetrates through the upper base plate 1, the under-plate pad 2, the intermediate base plate 3, and the elastic pad 9 to fix the fastener on the track bed; as shown in fig. 2, a first mass block accommodating cavity 11 is formed in the upper base plate 1, a first resonant mass block 71 and a first sound absorbing cotton 81 are arranged in the first mass block accommodating cavity 11, the first mass block accommodating cavity 11 is in a horn shape, and the diameter of an opening at the lower end of the first mass block accommodating cavity 11 is larger than that of an opening at the upper end of the first mass block accommodating cavity 11.
According to the resonant vibration-damping fastener, the first resonant mass block 71, the plate lower pad 2 and the rail lower pad 4 jointly form a primary resonant system, when a steel rail vibrates in a specific frequency band, the primary resonant system can generate reverse resonance to absorb the vibration energy of the steel rail, so that the vibration and noise radiation of the steel rail are reduced, and the wave abrasion phenomenon of the steel rail is reduced; first quality piece holds 11 chambeies and sets up to the horn mouth form, and the horn mouth form does benefit to the abundant quick absorption of sound and enters into first quality piece and holds the chamber 11 in, and the noise is held the first sound absorption cotton 81 absorption in the chamber 11 by first quality piece.
The first sound insulation coating is arranged on the upper base plate 1, sound which is not absorbed by the first sound absorption cotton 81 in the first mass block accommodating cavity 11 enters the first sound insulation coating, and the resonant vibration damping fastener achieves the effect of noise reduction through internal absorption and external insulation.
Specifically, the position where the first soundproof coating is provided on the upper floor 1 is not limited. The first soundproof coating may be provided on the upper surface of the upper plate 1, the first soundproof coating may be provided on the lower surface of the upper plate 1, and the first soundproof coating may be provided on the inner surface of the first mass housing chamber 11.
Specifically, in the present embodiment, the first soundproof coating is preferably provided on the upper surface, the lower surface, the front surface, the rear surface, the left surface, the right surface of the upper base plate 1, and the inner surface of the first mass accommodating chamber 11.
The first sound insulation coating is arranged on the upper surface, the lower surface, the front surface, the rear surface, the left surface, the right surface and the inner surface of the first mass block accommodating cavity 11 of the upper base plate 1, sound which is not absorbed by the first sound absorption cotton 81 in the first mass block accommodating cavity 11 enters the first sound insulation coating, and the resonance type vibration reduction fastener achieves the effect of noise reduction through internal absorption and external separation.
Specifically, as shown in fig. 2, a second mass accommodating cavity 12 is provided in the intermediate bottom plate 3, and a second resonant mass 72 and a second sound absorbing cotton 82 are provided in the second mass accommodating cavity 12.
Set up second sound-proof coating on middle bottom plate 3, the sound that is not inhaled the cotton absorption of sound by the second sound of inhaling in second quality piece holding chamber 12 gets into second sound-proof coating, a resonant vibration formula damping fastener realize the effect of noise reduction through interior absorption outer isolation.
Specifically, the position where the second soundproof coating is provided on the intermediate floor 3 is not limited. The second soundproof coating may be provided on the upper surface of the intermediate bottom plate 3, the second soundproof coating may be provided on the lower surface of the intermediate bottom plate 3, and the second soundproof coating may be provided on the inner surface of the second mass accommodating chamber 12.
Specifically, in the present embodiment, the second soundproof coating is preferably provided on the upper surface, the lower surface, the front surface, the rear surface, the left surface, the right surface of the intermediate bottom plate 3, and the inner surface of the second mass accommodating chamber 12.
The second sound insulation coating is arranged on the upper surface, the lower surface, the front surface, the rear surface, the left surface, the right surface and the inner surface of the second mass block accommodating cavity 12 of the middle base plate 3, sound which is not absorbed by the second sound absorption cotton 81 in the second mass block accommodating cavity 12 enters the second sound insulation coating, and the resonance type vibration reduction fastener achieves the effect of noise reduction through internal absorption and external separation.
The second resonance mass block 72, the under-plate pad 2 and the elastic pad 9 jointly form a secondary resonance system, and when the steel rail vibrates in a specific frequency band, the secondary resonance system can generate reverse resonance to absorb the vibration energy of the steel rail, so that the vibration and noise radiation of the steel rail are further reduced, and the wave abrasion phenomenon of the steel rail is further reduced; the second mass block accommodating cavity 12 is arranged to facilitate the sound to be absorbed into the second mass block accommodating cavity 12 sufficiently and quickly, so that the second sound absorption cotton 82 can absorb more vibration noise of the steel rail conveniently.
Specifically, as shown in fig. 2, the second mass accommodating cavity 12 is flared, and an opening diameter of a lower end of the second mass accommodating cavity 12 is larger than an opening diameter of an upper end of the second mass accommodating cavity 12.
The cavity of the second mass block accommodating cavity 12 is arranged to be in a horn mouth shape, the horn mouth shape is beneficial to sound to be absorbed into the second mass block accommodating cavity 12 fully and quickly, and noise is absorbed by the second sound absorbing cotton 82 in the second mass block accommodating cavity 12.
Specifically, as shown in fig. 2, the position of the second mass accommodating cavity 12 corresponds to the position of the first mass accommodating cavity 11.
The arrangement is that the first mass accommodating cavity 11 and the second mass accommodating cavity 12 can be butted together, and sound is ensured to be completely transmitted along the two-stage mass accommodating cavities when being transmitted from the first mass accommodating cavity 11 to the second mass accommodating cavity 12.
Specifically, the opening diameter of the lower end of the first mass accommodating cavity 11 is smaller than or equal to the opening diameter of the upper end of the second mass accommodating cavity 12.
The arrangement is that the first mass accommodating cavity 11 and the second mass accommodating cavity 12 can be completely butted together, and sound is ensured to be completely transmitted along the two-stage mass accommodating cavities when being transmitted from the first mass accommodating cavity 11 to the second mass accommodating cavity 12.
Preferably, in this embodiment, as shown in fig. 2, the diameter of the opening at the lower end of the first mass accommodating cavity 11 is equal to the diameter of the opening at the upper end of the second mass accommodating cavity 12.
Specifically, one or more mutually independent first mass block accommodating cavities 11 are arranged on the upper base plate 1, and the number of the second mass block accommodating cavities 12 is equal to that of the first mass block accommodating cavities 11. The number of the first mass accommodating cavity 11 and the second mass accommodating cavity 12 may be set to be one, two, four, six, or the like.
Preferably, in this embodiment, as shown in fig. 2, two independent first mass accommodating cavities 11 are provided on the upper base plate 1, and the number of the second mass accommodating cavities 12 is also two.
Specifically, as shown in fig. 2, a first sound absorbing cotton 81 is provided between the first resonating mass 71 and the upper plate 1, and a second sound absorbing cotton 82 is provided between the second resonating mass 72 and the intermediate plate 3.
Specifically, as shown in fig. 2, the thickness of the first resonant mass 71 is the same as that of the upper plate 1, and the thickness of the second resonant mass 72 is the same as that of the intermediate plate 3.
Specifically, as shown in fig. 2, the fastener includes a lower plate 10, and the lower plate 10 is located at the lower side of the elastic pad 9.
The materials of the first resonant mass 71 and the second resonant mass 72 are not limited. The material of the first resonator mass 71 and the second resonator mass 72 may be QT450-10, 304 stainless steel or brass, etc.
Preferably, the material of the first resonator mass 71 and the second resonator mass 72 is brass. Brass is an alloy consisting of copper and zinc, and has high strength, high hardness and chemical corrosion resistance.
Compared with the prior art, the resonance type vibration damping fastener provided in this embodiment has the following beneficial effects:
1) in the resonant vibration-damping fastener, the first mass block accommodating cavity is in a horn mouth shape, sound is absorbed into the first mass block accommodating cavity fully and quickly due to the horn mouth shape, and noise is absorbed by the first sound-absorbing cotton in the first mass block accommodating cavity.
2) This embodiment a resonant vibration damping fastener, second quality piece hold the chamber and set up to the horn mouth form, the horn mouth form does benefit to the abundant quick absorption of sound and enters into second quality piece and holds the intracavity, the noise is held the second of intracavity by the second quality piece and is inhaled the sound cotton and absorb.
3) In the resonant vibration-damping fastener, the first resonant mass block, the under-plate pad and the under-rail pad jointly form a first-stage resonant system, the second resonant mass block, the under-plate pad and the elastic pad jointly form a second-stage resonant system, and the natural frequency of the two-stage resonant system is consistent with certain characteristic frequencies of the steel rail. According to the principle of the dynamic vibration absorber, when the steel rail vibrates in a specific frequency band, the resonance mass block, the under-plate pad and the under-rail pad form a resonance system which can generate reverse resonance to absorb the vibration energy of the steel rail, so that the vibration and noise radiation of the steel rail are reduced, and the wave abrasion phenomenon of the steel rail is reduced.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the utility model as defined in the appended claims.
Claims (10)
1. A resonant vibration damping fastener is characterized by comprising an upper base plate (1), a middle base plate (3) and anchor bolts (5), steel rails are mounted on the upper base plate (1), a rail lower pad (4) is arranged between the upper base plate (1) and the steel rails, and the anchor bolts (5) sequentially penetrate through the upper base plate (1), the plate lower pad (2), the middle base plate (3) and an elastic pad (9) to fix the fastener on a track bed; set up first quality piece on upper plate (1) and hold chamber (11) first quality piece holds and sets up first resonance quality piece (71) and first sound cotton (81) of inhaling in chamber (11), first quality piece holds chamber (11) and sets up to the horn mouth form, the opening diameter that first quality piece held chamber (11) lower extreme is greater than the opening diameter that first quality piece held chamber (11) upper end.
2. A resonance vibration damping fastener according to claim 1, wherein a second mass accommodating cavity (12) is provided in said intermediate base plate (3), and a second resonant mass (72) and a second sound-absorbing cotton (82) are provided in said second mass accommodating cavity (12).
3. A resonance vibration damping fastener according to claim 2, wherein said second mass accommodating chamber (12) is formed in a bell mouth shape, and the opening diameter of the lower end of said second mass accommodating chamber (12) is larger than the opening diameter of the upper end of said second mass accommodating chamber (12).
4. A resonant vibration damping fastener according to claim 2 or 3, wherein the position of said second mass receiving cavity (12) corresponds to the position of said first mass receiving cavity (11).
5. A resonance vibration damping fastener according to claim 4, wherein the opening diameter of the lower end of said first mass accommodating chamber (11) is smaller than the opening diameter of the upper end of said second mass accommodating chamber (12).
6. A resonance vibration damping fastener according to claim 4, wherein the opening diameter of the lower end of said first mass accommodating chamber (11) is equal to the opening diameter of the upper end of said second mass accommodating chamber (12).
7. A resonance type vibration damping fastener according to claim 2, wherein one or more mutually independent first mass accommodating cavities (11) are provided in said upper base plate (1), and the number of said second mass accommodating cavities (12) is equal to the number of said first mass accommodating cavities (11).
8. A resonance vibration damping fastener according to claim 7, wherein a first sound-absorbing cotton (81) is provided between said first resonator mass (71) and said upper plate (1), and a second sound-absorbing cotton (82) is provided between said second resonator mass (72) and said intermediate plate (3).
9. A resonant vibration-damping fastener according to claim 8, wherein said first resonant mass (71) has the same thickness as said upper plate (1) and said second resonant mass (72) has the same thickness as said intermediate plate (3).
10. A resonance vibration damping fastener according to claim 1, wherein said fastener comprises a lower base plate (10), said lower base plate (10) being disposed below said elastic pad (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122754147.8U CN216193689U (en) | 2021-11-11 | 2021-11-11 | Resonant vibration-damping fastener |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122754147.8U CN216193689U (en) | 2021-11-11 | 2021-11-11 | Resonant vibration-damping fastener |
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| Publication Number | Publication Date |
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| CN216193689U true CN216193689U (en) | 2022-04-05 |
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| CN202122754147.8U Active CN216193689U (en) | 2021-11-11 | 2021-11-11 | Resonant vibration-damping fastener |
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