CN115075063A - Steel rail damping noise reduction device and installation method - Google Patents
Steel rail damping noise reduction device and installation method Download PDFInfo
- Publication number
- CN115075063A CN115075063A CN202210862378.7A CN202210862378A CN115075063A CN 115075063 A CN115075063 A CN 115075063A CN 202210862378 A CN202210862378 A CN 202210862378A CN 115075063 A CN115075063 A CN 115075063A
- Authority
- CN
- China
- Prior art keywords
- rail
- damping
- layer
- web
- plate
- 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
- 238000013016 damping Methods 0.000 title claims abstract description 258
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 80
- 239000010959 steel Substances 0.000 title claims abstract description 80
- 230000009467 reduction Effects 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000009434 installation Methods 0.000 title abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 38
- 239000002861 polymer material Substances 0.000 claims description 14
- 230000003014 reinforcing effect Effects 0.000 claims description 12
- 230000000452 restraining effect Effects 0.000 claims description 7
- 238000000748 compression moulding Methods 0.000 claims description 6
- 241001669679 Eleotris Species 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 25
- 238000001514 detection method Methods 0.000 abstract description 18
- 230000002829 reductive effect Effects 0.000 abstract description 18
- 230000008569 process Effects 0.000 abstract description 9
- 239000002131 composite material Substances 0.000 abstract description 5
- 238000011900 installation process Methods 0.000 abstract description 5
- 239000010410 layer Substances 0.000 description 139
- 239000007769 metal material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000005728 strengthening Methods 0.000 description 4
- 230000007797 corrosion Effects 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 239000013013 elastic material Substances 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 235000019589 hardness Nutrition 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 239000012778 molding material Substances 0.000 description 2
- 239000011241 protective layer Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 210000003000 inclusion body Anatomy 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B29/00—Laying, rebuilding, or taking-up tracks; Tools or machines therefor
- E01B29/32—Installing or removing track components, not covered by the preceding groups, e.g. sole-plates, rail anchors
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Railway Tracks (AREA)
Abstract
The invention discloses a steel rail damping noise reduction device and an installation method, wherein the steel rail damping noise reduction device comprises: the rail comprises a rail web damping plate, a rail bottom damping plate and a clamp. The damping vibrator is added into the damping layer to form the composite damping layer, the damping vibrator with high density and heavy mass is used for absorbing more vibration energy, and the damping vibrator and the damping material generate heat through friction to consume the vibration energy, so that the damping noise reduction effect is greatly improved. Two adjacent rail waist damping plates are connected through a lock catch structure, so that the two adjacent rail waist damping plates are connected closely and reliably, a connecting gap is reduced, and noise is prevented from being transmitted through the connecting gap. The steel rail damping noise reduction device is installed by adopting the assembled clamp, so that the bonding process is reduced, the installation process is simplified, the bonding cost is saved, and the installation efficiency is improved. The device is particularly convenient for regular flaw detection work of the steel rail, greatly reduces the flaw detection cost and improves the flaw detection efficiency.
Description
Technical Field
The invention relates to the technical field of vibration and noise reduction of a track, in particular to a steel rail damping noise reduction device and an installation method.
Background
With the continuous acceleration of the urbanization process of China, the continuous increase of the population quantity of cities and the increasing traffic pressure, the subway is used as a traffic system with large traffic volume, and the subway becomes a main means for solving the problem of traffic jam by virtue of the advantages of rapidness, comfort and safety. A series of vibration and noise problems are generated in the operation process of the subway system, so that the living experience of the residents along the subway line is reduced. The noise of the subway mainly comprises traction locomotive noise, wheel track noise, pantograph and aerodynamic noise of vehicles, structural noise of bridges and auxiliary structures radiated by vibration excitation and the like. Wheel rail rolling noise dominates the whole railway noise, and rail vibration noise is an important component of the wheel rail noise, so that the development of a low-noise rail has important significance for reducing the whole railway noise.
The damping noise reduction device is formed by adhering damping materials to the surface of the steel rail, when the steel rail vibrates under the action of wheel and rail force, the damping layer deforms along with the vibration of the steel rail to generate dynamic stress and shear strain, one part of energy is converted into heat energy to be dissipated, and the other part of energy is stored in a potential energy mode, so that the aims of reducing damping vibration and reducing noise are fulfilled. However, the existing damping noise reduction device has the following problems:
(1) only a single high polymer material is adopted as a damping material, and the high polymer material has low density, small absorbed vibration energy and small vibration energy converted into heat energy, so that the damping and noise reduction effects need to be improved.
(2) And gaps exist at the splicing positions of the damping noise reduction devices, and the vibration noise of the steel rail is transmitted out from the splicing gaps, so that the noise reduction effect is reduced.
(3) Most damping noise reduction devices are fixed in a bonding mode, the construction process is complex, and the problem of glue failure and falling exists. When the regular flaw detection is carried out on the steel rail, the damping noise reduction device needs to be peeled off firstly, and the damping noise reduction device needs to be bonded again after the flaw detection.
(4) The device with partial damping and noise reduction is fixed by an elastic clamp, but the pressing force cannot be adjusted. In the using process, the clamp becomes loose and falls off integrally due to the vibration of the steel rail and other reasons. When the elasticity of the elastic card is attenuated, the damping noise reduction device cannot be attached to the steel rail, so that the noise reduction effect is reduced.
Through patent retrieval, the following patents have a certain relationship with the application:
1. the invention belongs to the field of vibration and noise reduction, and particularly relates to a restraining damping device which can increase the self damping of a structure and realize a good vibration and noise reduction function, wherein the restraining damping device belongs to the field of vibration and noise reduction, and is provided with an application number of 201611205613.4, an application date of 2016.12.23, a publication number of CN106758569A, a publication date of 2017.05.31, a name of a restraining damping noise reduction plate, and an application number of Qingdao Ke and Tai environmental control technology Limited company. The utility model provides a board of making an uproar falls in restraint damping, includes connecting plate and restraint board, and the concatenation department of connecting plate and restraint board corresponds respectively sets up protruding stupefied and the restraint board concatenation is protruding stupefied, and the protruding stupefied at least one of restraint board concatenation of connecting plate concatenation set up positioning groove on the side of cooperating each other, still is equipped with the elastic separation strip that elastic material made between the protruding stupefied and the restraint board concatenation of connecting plate concatenation, elastic separation strip local inlays to be established in positioning groove, and the connecting plate links to each other through elastic separation strip joggle with restraint board, elastic separation strip and damping layer make connecting plate and restraint board keep elastic isolation.
2. The built-in metal vibrator vibration and noise reduction dynamic vibration absorber structure is arranged on two sides of a rail web of a steel rail between two adjacent fasteners and comprises an inclusion body protective layer, an elastic damping body and a metal mass body; the elastic damping body is tightly attached and fixed on the steel rail and comprises a first elastic damping body and a second elastic damping body which are laminated and fixed into a whole, and the hardness of the first elastic damping body is greater than that of the second elastic damping body; the metal mass body is a plurality of winding wave-shaped metal plates which are nested inside the elastic damping body at intervals; the inclusion protective layer covers the exposed surface of the elastic damping body; this structure utilizes the effective working area of winding formula increase damping under the prerequisite that satisfies the sufficient intensity of damping material, improves the vibration propagation attenuation rate to damping material sets up the damping demand of two kinds of different hardnesses in order to satisfy different frequency ranges, can effectively reduce track traffic's operation noise from noise source department, and its use does not influence the maintenance of track traffic former infrastructure and track.
3. Chinese patent inventions of ' 201821340278.3 ', 2018.08.20 ' on filing date, ' CN208733400U ' on publication date, ' 2019.04.12 ' on publication date, ' silent steel rail with self-locking type extended layer with groove ', and applicant ' Sichuan Rui iron science and technology Limited liability company ', the utility model discloses a self-locking silent steel rail with a groove expansion layer, which comprises a steel rail and expansion layers attached to the two sides of the rail web of the steel rail, a restraint layer connected with the expansion layer, a spring clamp contacted with the outer edge of the restraint layer and used for extruding and attaching the restraint layer and the expansion layer on the rail web of the steel rail, a damping layer attached between the expansion layer and the restraint layer, a steel rail cushion layer with the bottom sleeved on the bottom of the steel rail, the top of the inner edge connected with the bottom of the outer edge of the expansion layer and in a U shape along the radial direction of the steel rail, and the clamping layer is arranged between the steel rail cushion layer and the spring clamp and is U-shaped along the radial direction of the steel rail.
4. The utility model discloses a chinese invention patent of application number "201821341145.8", application date "2018.08.20", publication number "CN 208733401U", publication date "2019.04.12", name "a slotted extension layer for silent steel rail", applicant for "sichuan Rui iron science and technology finite responsible company", this utility model discloses a slotted extension layer for silent steel rail, this extension layer is two structures the same, and relative lay in order to wrap the subdivision body of the web of rail and rail seat of steel rail. Any split body includes rail waist attaching plate of inboard edge laminating on the rail waist of rail to and be connected, be used for wrapping up the rail bottom parcel board of rail seat with the lower extreme edge of rail waist attaching plate. The rail waist attaching plate comprises a rail waist attaching portion attached to the rail waist, an upper constraint self-locking portion and a lower constraint self-locking portion, wherein the upper constraint self-locking portion and the lower constraint self-locking portion are connected with the rail waist attaching portion and are used for being connected with the constraint layer. The rail bottom wrapping plate comprises a U-shaped wrapping portion which is used for wrapping the rail seat and is in a U shape, and a transition supporting portion which is arranged between the U-shaped wrapping portion and the lower constraint self-locking portion.
5. The utility model discloses a utility model patent of application number "202122180686.5", application date "2021.09.09", publication number "CN 215947752U", publication number "2022.03.04", the name "a rail damping device", applicant for "shoal new materials science and technology limited company", this utility model patent includes extension layer, constraining layer and sets up the damping layer between extension layer and constraining layer, the extension layer includes the extension upper portion, extension middle part and the extension lower part that laminate and integrated into one piece with railhead downside, web and the rail end of rail respectively, the extension upper portion outside is provided with lock catch portion one towards the rail end, constraining layer one end is provided with the wedge portion one of embedding at lock catch portion one, the utility model discloses a lock catch portion one is provided with on extension upper portion, set up wedge portion one at constraining layer one end for the cooperation of constraining layer and extension layer is closely reliable, wedge portion one and lock catch portion one extrude each other and lock catch portion one, the injection molding material can be prevented from overflowing from the buckling part in the injection molding process of the damping layer, and the injection molding material cannot be separated from the buckling part after injection molding is finished, so that the structure is compact, and the overall density and the structural reliability are improved.
However, the above patents all have the following technical problems: a. the single damping material is adopted, the damping noise reduction effect is not ideal enough, b and vibration noise are transmitted out from the splicing gap of the damping noise reduction device, and c and steel rail flaw detection are inconvenient.
Disclosure of Invention
The invention aims to solve the technical problem of providing a steel rail damping noise reduction device and an installation method aiming at the defects in the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a rail damping noise reducer comprising: the rail web vibration reduction plate comprises a rail web elastic layer, a rail web damping layer and a rail web constraint layer, and the rail web damping layer is clamped between the rail web elastic layer and the rail web constraint layer. The rail web damping layer is composed of a damping material and damping vibrators dispersed in the damping material, wherein the damping vibrators are geometrical bodies with density larger than that of the damping material and are wrapped in the damping material. The damping vibrator is added into the damping layer to form the composite damping layer, and the damping vibrator has large amplitude due to the large density and heavy mass of the damping vibrator and the vibration of the steel rail, so that the damping vibrator can absorb more vibration energy. The damping vibrator vibrates in the damping material in a large amplitude manner, and the effect of generating heat by friction with the damping material is obvious, so that the damping noise reduction effect can be greatly improved.
Furthermore, the damping vibrators are steel balls, the steel balls are arranged in the rail web damping layer in a matrix arrangement mode, and the steel balls are arranged in a vertically staggered mode. The steel balls are uniformly distributed in the rail web damping layer, and a better damping noise reduction effect is obtained.
Furthermore, the two ends of the rail waist vibration-damping plate are provided with a lock catch structure, and two adjacent rail waist vibration-damping plates along the length direction of the steel rail are connected through the lock catch structure. The two adjacent rail web vibration damping plates are connected closely and reliably, the connecting gap is reduced, and noise is prevented from being transmitted out through the connecting gap.
Further, the latch structure includes: the male lock catch and the female lock catch or the lower hasp and the upper hasp. The joint force of the joint of the rail waist vibration damping plate is increased, so that the joint gap is prevented from being increased due to expansion caused by heat and contraction caused by cold, and the noise is reduced.
And further, rail web longitudinal reinforcing ribs and rail web vertical reinforcing ribs are arranged on the contact surface of the rail web constraint layer and the rail web damping layer. Make the vertical strengthening rib of rail web and the vertical strengthening rib of rail web imbed in the rail web damping layer, the rail web damping layer vibration of restriction limit layer, the rail web damping layer in increase intermediate level and the rail web damping layer's on limit layer strain amplitude and shearing effect, effectively improve the damping and fall the performance of making an uproar.
Furthermore, the rail web longitudinal reinforcing rib is provided with a boss, and the rail web restraint layer is formed by compression molding of a high polymer material. The high molecular material is adopted to replace the common metal material, so that the high molecular material has the advantages of light weight, corrosion resistance and easiness in processing, the cost is greatly reduced, and the effect is improved.
Further, the rail foot damper plate is U-shaped, includes: the rail bottom damping layer is clamped between the rail bottom restraining layer and the rail bottom elastic layer and consists of damping materials and damping vibrators dispersed in the damping materials. And the damping vibrator is utilized to absorb more vibration energy, so that the damping noise reduction effect is improved.
Furthermore, the rail bottom constraint layer is U-shaped, the inner side of the rail bottom constraint layer is provided with reinforcing ribs of the rail bottom constraint layer, the opening position of the rail bottom constraint layer is provided with fixing holes of the rail bottom constraint layer, and the rail bottom constraint layer is molded by adopting a high polymer material. Utilize rail end restraint layer strengthening rib and rail end restraint layer fixed orifices to restrict the rail end damping layer vibration on limit layer, increase the rail end damping layer in intermediate level and the rail end damping layer's on limit layer strain amplitude and shearing effect, effectively improved the damping and fallen the performance of making an uproar. The polymer material is adopted to replace the common metal material, thereby greatly reducing the cost and improving the efficacy.
Further, the clamp is an assembly clamp, including: the clamp comprises a fixed clamp foot, a clamp base, a movable clamp foot, an ejector rod and a locking nut, wherein the fixed clamp foot is fixedly connected to one end of the clamp base, the ejector rod is rotatably connected to the other end of the clamp base, the locking nut is screwed on the ejector rod, and the movable clamp foot is movably arranged between the fixed clamp foot and the ejector rod; the movable clamping legs are jacked to the fixed clamping legs through rotating the jacking rods, so that the rail waist vibration reduction plates are clamped on two sides of the rail waist, and the rail bottom vibration reduction plates are clamped on two sides of the rail bottom. The steel rail damping noise reduction device is installed by adopting the assembled clamp, so that the bonding process is reduced, the installation process is simplified, the bonding cost is saved, and the installation efficiency is improved. The device is particularly convenient for regular flaw detection work of the steel rail, greatly reduces the flaw detection cost and improves the flaw detection efficiency.
The mounting method of the steel rail damping noise reduction device comprises the following steps:
s1: attaching a first rail web damping plate to one side of a rail web;
s2: attaching a second rail web vibration damping plate to one side of the rail web along the rail direction, and connecting a locking structure at one end of the second rail web vibration damping plate with a locking structure at one end of the first rail web vibration damping plate in a matching manner, and so on, and fully attaching the rail web vibration damping plate to one side of the rail web;
s3: aligning the opening of the first U-shaped rail bottom damping plate with the rail bottom on one side of the steel rail, and inserting the rail bottom damping plate on the rail bottom;
s4: inserting a second rail bottom damping plate on the rail bottom along the rail direction, and repeating the steps until the rail bottom damping plate is fully inserted except the position where the fastener is installed on one side of the rail bottom;
s5: adhering a rail waist damping plate and inserting a rail bottom damping plate on the other side of the steel rail according to the steps from S1 to S4;
s6: one end of the clamp base, which is provided with the ejector rod, penetrates through a gap between the rail bottom and the sleeper, so that the fixed clamp foot is positioned on one side of the steel rail, and the ejector rod is positioned on the other side of the steel rail;
s7: installing the movable clamping foot on a clamp base, screwing the ejector rod, enabling the fixed clamping foot and the movable clamping foot to respectively press the rail waist vibration reduction plate on the rail waist from two sides of the steel rail, and pressing the rail bottom vibration reduction plate on the rail bottom;
s8: and the locking nut is screwed to prevent the ejector rod from loosening.
The invention has the beneficial effects that: the damping vibrator is added into the damping layer to form the composite damping layer, the damping vibrator with high density and heavy mass is used for absorbing more vibration energy, and the damping vibrator and the damping material generate heat through friction, so that energy is consumed, and the damping noise reduction effect is greatly improved. Two adjacent rail waist damping plates are connected through a lock catch structure, so that the two adjacent rail waist damping plates are connected closely and reliably, a connecting gap is reduced, and noise is prevented from being transmitted through the connecting gap. The steel rail damping noise reduction device is installed by adopting the assembled clamp, so that the bonding process is reduced, the installation process is simplified, the bonding cost is saved, and the installation efficiency is improved. The device is particularly convenient for regular flaw detection work of the steel rail, greatly reduces the flaw detection cost and improves the flaw detection efficiency.
Drawings
FIG. 1 is a schematic perspective view of a damping and noise-reducing device mounted on a steel rail,
FIG. 2 is a schematic sectional view A-A of FIG. 1,
FIG. 3 is a schematic perspective view of the rail web damper plate after being disassembled,
figure 4 is a schematic perspective structure view of the rail web constraining layer,
figure 5 is a schematic perspective view of a rail web damper plate according to an embodiment of the present invention after splicing,
figure 6 is a schematic cross-sectional view of B-B in figure 5,
figure 7 is a schematic cross-sectional view of C-C of figure 6,
figure 8 is an enlarged view of a portion D of figure 7,
figure 9 is a schematic perspective view of a second embodiment of the web damper,
figure 10 is a schematic view of a rail web damper plate embodiment two after splicing,
figure 11 is an enlarged view of portion E of figure 10,
figure 12 is a schematic perspective view of a rail foot damper plate,
figure 13 is a schematic cross-sectional view F-F of figure 12,
figure 14 is a schematic perspective view of a tie layer of the rail base,
fig. 15 is a perspective view of the clamp.
In the figure: 1-steel rail, 11-rail top, 12-rail waist and 13-rail bottom;
2-rail web vibration damping plate, 21-rail web elastic layer, 22-rail web damping layer, 23-rail web restraint layer, 231-transverse rib plate, 232-vertical rib plate, 233-boss, 24-lock catch structure, 241-male lock catch, 242-female lock catch, 243-lower buckle and 244-upper buckle;
3-rail bottom vibration damping plate, 31-rail bottom constraint layer, 311-rail bottom constraint layer, 31-rail bottom constraint layer, 32-rail bottom damping layer and 33-rail bottom elastic layer;
4-clamp, 41-fixed clamp foot, 42-clamp base, 43-movable clamp foot, 44-ejector pin, 45-lock nut;
5, damping the oscillator;
x-transverse, Y-rail, and Z-vertical.
Detailed Description
The invention is further described by the following specific embodiments in conjunction with the attached drawings:
the rail 1 is composed of a rail top 11, a rail web 12 and a rail bottom 13, and the vibration generated when the wheel runs on the rail top 11 can radiate to the periphery through the rail web 12 and the rail bottom 13 to generate noise. In order to reduce vibration noise, a damping noise reduction device is used for wrapping the rail web 12 and the rail bottom 13. The damping noise reduction device is used for absorbing vibration energy, and the vibration energy is converted into heat energy to be dissipated to the atmosphere by utilizing the shear strain generated by the damping material, so that the vibration noise is reduced.
As shown in fig. 1 and 2, the rail damping and noise reducing device of the present invention comprises: the rail-web vibration damping plate 2, the rail-bottom vibration damping plate 3 and the clamp 4.
As shown in fig. 3, the rail web damper plate 2 includes: the rail web elastic layer 21, the rail web damping layer 22 and the rail web restraint layer 23, and the rail web damping layer 22 is clamped between the rail web elastic layer 21 and the rail web restraint layer 23. The rail web elastic layer 21 is made of elastic material, is attached to the rail web 12 and is used for transmitting the vibration of the rail web 12 to the rail web damping layer 22. The rail web constraint layer 23 is used for wrapping the rail web damping layer 22, and the rail web constraint layer 23 is made of a material with a large elastic modulus so as to strengthen the limiting effect on the vibration of the rail web damping layer 22 and increase the shear deformation of the rail web damping layer 22. The staggered reinforcing rib structure is usually formed by adopting metal materials such as magnesium-aluminum alloy and the like, has the defects of heavy gravity, easy corrosion, high cost and difficult processing. Therefore, the rail web restraint layer 23 is manufactured by adopting a high polymer material mould pressing mode, and the high polymer material is adopted to replace a common metal material, so that the rail web restraint layer has the advantages of light weight, corrosion resistance and easiness in processing, the cost is greatly reduced, and the effect is improved.
As shown in fig. 4, the rail web restraining layer 23 and the rail web damping layer 22 are provided with a staggered rib structure of the rail web longitudinal ribs 231 and the rail web vertical ribs 232 on the contact surface, and the longitudinal ribs 231 are further provided with bosses 233. When the rail web vibration damping plate 2 is subjected to compression molding, the rail web longitudinal reinforcing ribs 231, the rail web vertical reinforcing ribs 232 and the bosses 233 are embedded into the rail web damping layer 22 to limit the vibration of the rail web damping layer 22 on the side layer, so that the strain amplitude and the shearing effect of the rail web damping layer 22 on the middle layer and the rail web damping layer 22 on the side layer are increased, and the damping and noise reduction performance is effectively improved.
As shown in fig. 6 to 8, a polymer material with high viscosity is wrapped between the rail web elastic layer 21 and the rail web restriction layer 23 by compression molding to form the rail web damping layer 22. The vibration of the rail web 12 is transmitted through the web elastic layer 21 to the web damping layer 22, causing the damping material to vibrate, causing the damping material to develop shear strain. The different layers of the damping material generate friction heat to convert part of vibration kinetic energy into heat energy to be dissipated in the atmosphere, so that the effects of vibration reduction and noise reduction are achieved. The existing damping material only adopts a single high polymer material, and the high polymer material has low density, small absorbed vibration energy and less vibration energy converted into heat energy, so the damping and noise reduction effects are not ideal. The invention adopts the method that the damping material is added into the damping vibrator 5 to form a composite damping layer. The damping vibrator 5 is a geometric body with the density larger than that of the damping material, such as a steel column or a steel ball. Due to the fact that the damping vibrator 5 is high in density and heavy in mass, the damping vibrator 5 caused by vibration of the steel rail 1 is large in amplitude, and the damping vibrator 5 can absorb more vibration energy. The large-amplitude vibration of the damping vibrator 5 in the damping material has a remarkable effect of generating heat by friction with the damping material, so that the damping noise reduction effect is greatly improved.
The steel balls are arranged in the rail web damping layer 22 in a matrix arrangement mode, and the upper and lower rows of steel balls are arranged in a staggered mode in the vertical direction Z by a distance L. The gaps among the steel balls are equal, the steel balls are uniformly distributed in the rail web damping layer 22, the steel balls with more quantity and quality can be distributed in the arrangement mode, the steel balls with more quantity and quality can absorb more vibration energy, and better damping noise reduction effect is obtained through heat generation caused by friction of the steel balls with damping materials.
As shown in fig. 5: the two ends of the rail web damping plate 2 are provided with a locking structure 24, and two adjacent rail web damping plates 2 along the length direction Y of the steel rail are connected through the locking structure 24. The two adjacent rail web vibration damping plates 2 are connected tightly and reliably, the connecting gap is reduced, and noise is prevented from being transmitted out through the connecting gap.
As shown in fig. 7 and 8, the latch structure 24 is: the male lock 241 and the female lock 242, the male lock 241 being provided at one end of the web damper plate 2, and the female lock 242 being provided at the other end. The male locking device 241 at one end of the web damper 2 is connected with the female locking device 242 on the adjacent web damper 2. The projections of the male locking device 241 and the female locking device 242 on the Y-Z plane are rectangular, triangular and zigzag. Preferably, a trapezoid shape is adopted, and the width of the top end of the trapezoid-shaped male locking device 241 is larger than that of the bottom, and the width of the opening of the trapezoid-shaped female locking device 242 is smaller than that of the bottom. After the trapezoidal male lock catch 241 is matched and connected with the female lock catch 242, great pulling force can be borne, and the connecting gap cannot be increased due to expansion caused by heat and contraction caused by cold, so that vibration noise is prevented from being transmitted from the connecting gap, and a good noise reduction effect is achieved.
As shown in fig. 9 to 11, the locking structure 24 may also be: the lower snap 243 is engaged with the upper snap 244. The projections of the lower buckle 243 and the upper buckle 244 on the X-Y plane are rectangular and triangular, and preferably adopt zigzag shapes. The upper snap 244 at one end of the web damper plate 2 overlaps the lower snap 243 of the adjacent web damper plate 2. The zigzag lapping mode can avoid connecting gaps of the adjacent rail web damping plates 2 and bear large pulling force, so that vibration noise is prevented from being transmitted from the connecting gaps, and a good noise reduction effect is achieved.
As shown in fig. 12 to 14, the rail foot damper plate 3 is U-shaped, and includes: the rail bottom restraining layer 31, the rail bottom damping layer 32 and the rail bottom elastic layer 33, wherein the rail bottom elastic layer 33 is made of elastic materials, is attached to the rail bottom 13 and is used for transmitting the vibration of the rail bottom 13 to the rail bottom damping layer 32.
The rail bottom constraint layer 31 is used for wrapping the rail bottom damping layer 32, the rail bottom constraint layer 31 is U-shaped, the inner side of the rail bottom constraint layer 31 is provided with rail bottom constraint layer reinforcing ribs 311, and an opening position of the rail bottom constraint layer 31 is provided with a rail bottom constraint layer fixing hole 312. The rail bottom restraint layer 31 is formed by compression molding of a high polymer material. Utilize rail end restraint layer strengthening rib 311 and rail end restraint layer fixed orifices 312 restriction limit the rail end damping layer 32 vibration on limit layer, increase the rail end damping layer 32 in intermediate level and the rail end damping layer 32's on limit layer strain amplitude and shearing effect, effectively improve the damping and fall the performance of making an uproar. The polymer material is adopted to replace the common metal material, thereby greatly reducing the cost and improving the efficacy.
The rail foot damping layer 32 is sandwiched between the rail foot constraining layer 31 and the rail foot elastic layer 33, and the rail foot damping layer 32 is composed of a damping material and damping vibrators 5 dispersed in the damping material. And the damping vibrator 5 is used for absorbing more vibration energy, so that the damping noise reduction effect is improved.
As shown in fig. 15, the jig 4 is an assembly jig including: the clamp comprises a fixed clamp foot 41, a clamp base 42, a movable clamp foot 43, a top rod 44 and a locking nut 45, wherein the fixed clamp foot 41 is fixedly connected to one end of the clamp base 42, the top rod 44 is rotatably connected to the other end of the clamp base 42, the locking nut 45 is screwed on the top rod 44, and the movable clamp foot 43 is movably arranged between the fixed clamp foot 41 and the top rod 44; by rotating the push rod 44, the movable clamp leg 43 is pushed against the fixed clamp leg 41, so that the rail web damper plate 2 is clamped on both sides of the rail web 12, and the rail foot damper plate 3 is clamped on both sides of the rail foot 13. The steel rail damping noise reduction device is installed by adopting the assembled clamp, so that the bonding process is reduced, the installation process is simplified, the bonding cost is saved, and the installation efficiency is improved. In particular, the regular flaw detection work of the steel rail 1 is facilitated, the flaw detection cost is greatly reduced, and the flaw detection efficiency is improved.
The mounting method of the steel rail damping noise reduction device comprises the following steps:
s1: attaching a first rail web damping plate 2 to one side of a rail web 12;
s2: attaching a second rail web vibration damping plate 2 to one side of a rail web 12 along the rail direction Y, and connecting a lock catch structure 24 at one end of the second rail web vibration damping plate 2 with a lock catch structure 24 at one end of the first rail web vibration damping plate 2 in a matching manner, and so on, and attaching the rail web vibration damping plate 2 to one side of the rail web 12;
s3: aligning the opening of the first U-shaped rail bottom damping plate 3 with the rail bottom 13 on one side of the steel rail 1, and inserting the rail bottom damping plate 3 on the rail bottom 13;
s4: inserting a second rail bottom damping plate 3 on a rail bottom 13 along the rail direction Y, and repeating the steps, wherein the rail bottom damping plate 3 is fully inserted outside the positions of the fasteners on one side of the rail bottom 13;
s5: adhering a rail waist damping plate 2 and an inserted rail bottom damping plate 3 on the other side of the steel rail 1 according to the steps from S1 to S4;
s6: one end of the clamp base 42, which is provided with the ejector rod 44, penetrates through a gap between the rail bottom 13 and the sleeper, so that the fixed clamp foot 41 is positioned on one side of the steel rail 1, and the ejector rod 44 is positioned on the other side of the steel rail 1;
s7: installing the movable clamping leg 43 on the clamp base 42, and screwing the mandril 44 to ensure that the fixed clamping leg 41 and the movable clamping leg 43 respectively press the rail web damping plate 2 on the rail web 12 from two sides of the steel rail 1 and press the rail bottom damping plate 3 on the rail bottom 13;
s8: and the locking nut 45 is screwed to prevent the ejector rod 44 from loosening.
In conclusion, the beneficial effects of the invention are as follows: the damping vibrator is added into the damping layer to form the composite damping layer, the damping vibrator with high density and heavy mass is used for absorbing more vibration energy, and the damping vibrator and the damping material generate heat through friction, so that energy is consumed, and the damping noise reduction effect is greatly improved. Two adjacent rail waist damping plates are connected through a lock catch structure, so that the two adjacent rail waist damping plates are connected closely and reliably, a connecting gap is reduced, and noise is prevented from being transmitted through the connecting gap. The steel rail damping noise reduction device is installed by adopting the assembled clamp, so that the bonding process is reduced, the installation process is simplified, the bonding cost is saved, and the installation efficiency is improved. The device is particularly convenient for regular flaw detection work of the steel rail, greatly reduces the flaw detection cost and improves the flaw detection efficiency.
The above embodiments are provided for illustrative purposes only and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should fall within the scope of the present invention, and the scope of the present invention should be defined by the claims.
Claims (10)
1. A rail damping noise reducer comprising: rail web damping plate (2), rail end damping plate (3) and anchor clamps (4), rail web damping plate (2) are including rail web elastic layer (21), rail web damping layer (22) and rail web confined layer (23), and rail web damping layer (22) clamp between rail web elastic layer (21) and rail web confined layer (23), its characterized in that: the rail web damping layer (22) is composed of a damping material and damping vibrators (5) dispersed in the damping material, and the damping vibrators (5) are geometrical bodies with density larger than that of the damping material and wrapped in the damping material.
2. A rail damping and noise reducing apparatus according to claim 1, wherein: the damping vibrators (5) are steel balls, the steel balls are arranged in the rail web damping layer (22) in a matrix arrangement mode, and the steel balls are arranged in a staggered mode in the vertical direction (Z).
3. A rail damping and noise reducing apparatus according to claim 2, wherein: and lock catch structures (24) are arranged at two ends of the rail web vibration reduction plate (2), and two adjacent rail web vibration reduction plates (2) along the length direction (Y) of the steel rail are connected through the lock catch structures (24).
4. A damping and noise reducing device for a steel rail according to claim 3, wherein: the latch structure (24) includes: the male lock catch (241) and the female lock catch (242) or the lower hasp (243) and the upper hasp (244).
5. A rail damping and noise reducing device according to claim 4, wherein: the contact surface of the rail web restraint layer (23) and the rail web damping layer (22) is provided with a rail web longitudinal reinforcing rib (231) and a rail web vertical reinforcing rib (232).
6. A rail damping and noise reducing device according to claim 5, wherein: the rail web longitudinal reinforcing rib (231) is provided with a boss (233), and the rail web restraint layer (23) is formed by compression molding of a high polymer material.
7. A rail damping and noise reducing device according to claim 6, wherein: the rail bottom damping plate (3) is U-shaped and comprises: the rail bottom damping layer (32) is clamped between the rail bottom restraining layer (31) and the rail bottom elastic layer (33), and the rail bottom damping layer (32) is composed of damping materials and damping vibrators (5) dispersed in the damping materials.
8. A rail damping and noise reducing device according to claim 7, wherein: the rail bottom constraint layer (31) is U-shaped, the inner side of the rail bottom constraint layer (31) is provided with rail bottom constraint layer reinforcing ribs (311), an opening of the rail bottom constraint layer (31) is provided with rail bottom constraint layer fixing holes (312), and the rail bottom constraint layer (31) is formed by compression molding of a high polymer material.
9. A steel rail damping and noise reducing device according to any one of claims 1 to 8, wherein: anchor clamps (4) are assembled anchor clamps, include: the clamp comprises a fixed clamp foot (41), a clamp base (42), a movable clamp foot (43), an ejector rod (44) and a locking nut (45), wherein the fixed clamp foot (41) is fixedly connected to one end of the clamp base (42), the ejector rod (44) is rotatably connected to the other end of the clamp base (42), the locking nut (45) is rotatably sleeved on the ejector rod (44), and the movable clamp foot (43) is movably arranged between the fixed clamp foot (41) and the ejector rod (44); the movable clamping leg (43) is pushed to the fixed clamping leg (41) through rotating the ejector rod (44), so that the rail waist vibration damping plate (2) is clamped on two sides of the rail waist (12), and the rail bottom vibration damping plate (3) is clamped on two sides of the rail bottom (13).
10. A method of installing a rail damping and noise reducing device according to any one of claims 1 to 9, comprising the steps of:
s1: attaching a first rail web damping plate (2) to one side of a rail web (12);
s2: attaching a second rail waist vibration damping plate (2) to one side of a rail waist (12) along the rail direction (Y), and connecting a lock catch structure (24) at one end of the second rail waist vibration damping plate (2) with the lock catch structure (24) at one end of the first rail waist vibration damping plate (2) in a matching manner, and so on, and attaching the rail waist vibration damping plate (2) to one side of the rail waist (12);
s3: aligning an opening of a first U-shaped rail bottom damping plate (3) with a rail bottom (13) on one side of a rail (1), and inserting the rail bottom damping plate (3) on the rail bottom (13);
s4: inserting a second rail bottom damping plate (3) on the rail bottom (13) along the rail direction (Y), and repeating the steps until the rail bottom damping plate (3) is fully inserted except the position where the fastener is installed on one side of the rail bottom (13);
s5: adhering a rail waist damping plate (2) and an inserted rail bottom damping plate (3) to the other side of the steel rail (1) according to the steps from S1 to S4;
s6: one end of the clamp base (42) provided with the ejector rod (44) penetrates through a gap between the rail bottom (13) and the sleeper, so that the fixed clamping foot (41) is positioned on one side of the steel rail (1), and the ejector rod (44) is positioned on the other side of the steel rail (1);
s7: the movable clamping leg (43) is arranged on the clamp base (42), the ejector rod (44) is screwed, so that the fixed clamping leg (41) and the movable clamping leg (43) respectively press the rail web vibration reduction plate (2) on the rail web (12) from two sides of the steel rail (1), and press the rail bottom vibration reduction plate (3) on the rail bottom (13);
s8: and the locking nut (45) is screwed to prevent the ejector rod (44) from loosening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210862378.7A CN115075063A (en) | 2022-07-22 | 2022-07-22 | Steel rail damping noise reduction device and installation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210862378.7A CN115075063A (en) | 2022-07-22 | 2022-07-22 | Steel rail damping noise reduction device and installation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115075063A true CN115075063A (en) | 2022-09-20 |
Family
ID=83243403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210862378.7A Pending CN115075063A (en) | 2022-07-22 | 2022-07-22 | Steel rail damping noise reduction device and installation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115075063A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115929842A (en) * | 2023-01-05 | 2023-04-07 | 株洲时代瑞唯减振装备有限公司 | Vibration reduction method for driving motor of metro vehicle and composite vibration reduction mounting pad |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268850A (en) * | 2011-06-10 | 2011-12-07 | 北京环铁联合噪声控制科技有限公司 | Damping shock absorber for track |
| KR20140010741A (en) * | 2012-07-16 | 2014-01-27 | 한국철도기술연구원 | Rail for railroad |
| CN106758571A (en) * | 2017-02-21 | 2017-05-31 | 陕西长美科技有限责任公司 | A kind of track vibration damping denoising device |
| CN107603406A (en) * | 2017-09-18 | 2018-01-19 | 河北清华发展研究院 | A kind of lightweight constrained layer material and its application method for constrained damping structure |
| CN210826949U (en) * | 2019-09-26 | 2020-06-23 | 陕西长美科技有限责任公司 | Totally-enclosed flexible protection device for steel rail |
| CN211009410U (en) * | 2019-10-21 | 2020-07-14 | 无锡市青山铁路器材有限公司 | Clamp for mounting frequency modulation type steel rail vibration damper |
| CN215947752U (en) * | 2021-09-09 | 2022-03-04 | 株洲时代新材料科技股份有限公司 | Steel rail damping device |
-
2022
- 2022-07-22 CN CN202210862378.7A patent/CN115075063A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102268850A (en) * | 2011-06-10 | 2011-12-07 | 北京环铁联合噪声控制科技有限公司 | Damping shock absorber for track |
| KR20140010741A (en) * | 2012-07-16 | 2014-01-27 | 한국철도기술연구원 | Rail for railroad |
| CN106758571A (en) * | 2017-02-21 | 2017-05-31 | 陕西长美科技有限责任公司 | A kind of track vibration damping denoising device |
| CN107603406A (en) * | 2017-09-18 | 2018-01-19 | 河北清华发展研究院 | A kind of lightweight constrained layer material and its application method for constrained damping structure |
| CN210826949U (en) * | 2019-09-26 | 2020-06-23 | 陕西长美科技有限责任公司 | Totally-enclosed flexible protection device for steel rail |
| CN211009410U (en) * | 2019-10-21 | 2020-07-14 | 无锡市青山铁路器材有限公司 | Clamp for mounting frequency modulation type steel rail vibration damper |
| CN215947752U (en) * | 2021-09-09 | 2022-03-04 | 株洲时代新材料科技股份有限公司 | Steel rail damping device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115929842A (en) * | 2023-01-05 | 2023-04-07 | 株洲时代瑞唯减振装备有限公司 | Vibration reduction method for driving motor of metro vehicle and composite vibration reduction mounting pad |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202369865U (en) | Elastic fixing device of track | |
| CN103088724B (en) | Rail fixing device with function of vertical guidance | |
| CN201165622Y (en) | Easy-to-detach track double-layer vibration absorption denoising fastener | |
| WO2008043249A1 (en) | A rail with vibration damper | |
| CN112431074B (en) | Double-layer track vibration reduction fastener with shoulder | |
| CN108004858A (en) | A kind of suspension type monorail traffic track beam | |
| CN115075063A (en) | Steel rail damping noise reduction device and installation method | |
| CN208981033U (en) | A kind of lock-up type Damping fastening system | |
| CN111576096A (en) | Retaining shoulder-free fastener for urban rail transit | |
| CN212505646U (en) | Retaining shoulder-free fastener for urban rail transit | |
| CN210797117U (en) | Steel rail vibration damping pad | |
| CN113403892A (en) | Method for increasing damping performance of steel rail damper and steel rail damper | |
| CN203938938U (en) | A kind of pair of rigidity steel rail vibration reduction fastener | |
| CN109537375B (en) | Rail vibration absorber with built-in bottom plate and design method thereof | |
| CN107740310B (en) | Novel high-elastic vibration reduction iron backing plate | |
| CN216663647U (en) | Vibration damping fastener | |
| CN212270545U (en) | Abnormal abrasion suppression device for rail transit wheel rail | |
| CN213389532U (en) | Railway base plate | |
| CN209941410U (en) | Shockproof reinforced bottom plate for rail joint | |
| CN111827019A (en) | Track backing plate with vibration/noise reduction function | |
| CN201010836Y (en) | Plate-type vibration reducing rail buckle | |
| CN220927576U (en) | Rail transit side wall sound absorber | |
| CN110373958B (en) | Vibration reduction fastener system | |
| CN218059732U (en) | Keep off shoulder formula damping fastener | |
| CN218596774U (en) | Locking type compression type shock absorber subassembly |
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 |