WO2023240894A1 - Adjustable steel rail vibration absorber and steel rail vibration absorption system - Google Patents

Abstract

An adjustable steel rail vibration absorber, comprising: a pair of vibration absorption wedge blocks (11), which are used for being attached to waist portions of two sides of a steel rail (200), and absorbing vibration energy of the steel rail (200); and at least one balancing weight (12), which is detachably connected to a non-attachment surface (113) of the vibration absorption wedge block (11), and is used for adjusting the vibration frequency of the steel rail (200). The adjustable steel rail vibration absorber can effectively absorb vibration energy of a steel rail (200); and the vibration frequency of the steel rail (200) can be changed by means of adjusting the number of balancing weights (12), thereby adapting to the vibration characteristic frequencies of steel rails (200) in different regions, and better meeting an actual engineering condition. Therefore, the adjustable steel rail vibration absorber has relatively high flexibility and adaptability, is applicable to rails in different regions, and can achieve an ideal vibration and noise reduction effect, reduce the cost of rail construction and also reduce the difficulty of later maintenance.

Description

An adjustable rail vibration absorber and rail vibration absorption system Technical field

The invention belongs to the technical field of rail vibration and noise reduction, and specifically relates to an adjustable rail vibration absorber and a rail vibration absorption system.

Background technique

During the operation of rail transit trains, the wheels come into contact with the rails, which will produce corresponding impact vibrations and radiate wheel-rail noise to the surroundings.

The rail vibration absorber is a damping dynamic vibration absorber installed on the waists of both sides of the rail. It mainly installs vibration-absorbing masses on both sides of the rail, so that when the rail vibrates, the vibration-absorbing masses close to the rail waists on both sides of the rail can absorb the energy loss. It dissipates rail vibration energy, thereby changing the characteristics of rail vibration longitudinal transmission along the line, and plays a role in reducing medium and high-frequency rail radiation noise, delaying abnormal rail wear, preventing breakage of buckle accessories, and improving passenger comfort.

In the existing patent CN201210297958.2, a rail waveguide vibration-absorbing muffler is disclosed, which is composed of two rubber parts arranged on both sides of the rail and a mass block vulcanized inside each rubber part. The structure is relatively simple and can be used to a certain extent. Reduce rail vibration and the noise it causes. However, since the vibration characteristic frequencies of rails in different length areas on the track line are different, the existing rail vibration absorber is a single immutable mass body with a certain natural frequency, which can only be achieved for rails with specific vibration characteristic frequencies. The ideal vibration absorption and noise reduction effect cannot be well adapted to actual engineering conditions. To be applicable to rails with different vibration characteristic frequencies in different areas, it can only be preset by changing the arrangement and quantity of the mass blocks vulcanized inside the rubber parts when designing and producing rail vibration absorbers, which cannot be done at the actual engineering site. Flexible adjustment, not convenient for actual use. In addition, since the existing vibration absorbers have weak universal applicability to tracks in different regions, designing and manufacturing vibration absorbers with corresponding structures also increases the cost of track construction and increases the difficulty of later maintenance.

Contents of the invention

The present invention is carried out to solve the above problems, and the purpose is to provide an adjustable rail vibration absorber and a rail vibration absorption system. The present invention adopts the following technical solutions:

The invention provides an adjustable rail vibration absorber, which is characterized in that it includes: a pair of vibration-absorbing wedges for fitting on both sides of the waist of the rail to absorb the vibration energy of the rail; and at least one removable counterweight. The ground is connected to the non-fitting surface of the vibration-absorbing wedge to adjust the vibration frequency of the rail.

The adjustable rail vibration absorber provided by the present invention may also have the following technical features: wherein, the surface of the vibration-absorbing wedge facing the counterweight block has at least one positioning groove, and the extension direction of the positioning groove is consistent with the length direction of the vibration-absorbing wedge. consistent.

The adjustable rail vibration absorber provided by the present invention can also have the following technical features: the number of positioning grooves opened on a single vibration-absorbing wedge is two, and the two positioning grooves are respectively arranged in the height direction of the vibration-absorbing wedge. 1/3 height and 2/3 height position.

The adjustable rail vibration absorber provided by the present invention may also have the following technical features: wherein, the surface of the vibration-absorbing wedge facing the counterweight block has at least two mounting holes, and the mounting holes are opened between two positioning grooves along the The vibration-absorbing wedges are arranged in the length direction, and the counterweight block has a through hole that matches the mounting hole. The mounting hole and the through hole are connected by bolts, so that the counterweight block is installed on the vibration-absorbing wedge block.

The adjustable rail vibration absorber provided by the present invention may also have the following technical features: the counterweight block includes a counterweight metal piece and a counterweight rubber layer wrapped around the counterweight metal piece, and the mass of a single counterweight block is a single vibration-absorbing wedge. half the mass of the block.

The adjustable rail vibration absorber provided by the present invention can also have the following technical features: wherein the counterweight block is a rectangular parallelepiped, the length of the counterweight block is 360mm, the width is 20mm, the height is 80mm, and the mass of a single counterweight block is 4.5 kg.

The adjustable rail vibration absorber provided by the present invention may also have the following technical features: the vibration-absorbing wedge includes a vibration-absorbing rubber layer and at least one vibration-absorbing metal piece wrapped inside the vibration-absorbing rubber layer.

The adjustable rail vibration absorber provided by the present invention can also have the following technical features: the number of vibration-absorbing metal parts is three, and the three vibration-absorbing metal parts are arranged obliquely inside the vibration-absorbing rubber layer and arranged parallel to each other in the vertical direction. The distance between the middle vibration-absorbing metal piece and the upper vibration-absorbing metal piece is greater than the distance between it and the lower vibration-absorbing metal piece.

The adjustable rail vibration absorber provided by the present invention may also have the following technical features: the number of vibration-absorbing metal parts is one, and the thickness of the vibration-absorbing rubber layer is 3 mm.

The invention provides a rail vibration absorbing system, which is characterized in that it includes: an adjustable rail vibration absorber, used to absorb the vibration energy of the rail; and at least two fixing clips, used to fix the adjustable rail vibration absorber on the rail, Among them, the adjustable rail vibration absorber is the above-mentioned adjustable rail vibration absorber.

Invention functions and effects

According to the adjustable rail vibration absorber and rail vibration absorption system of the present invention, since the adjustable rail vibration absorber uses a pair of vibration-absorbing wedges to fit on both sides of the waist of the rail, it can effectively absorb the vibration energy of the rail; the counterweight is detachable. Connected to the vibration-absorbing wedge, by adjusting the number of counterweights, the vibration frequency of the rail can be changed to adapt to the vibration characteristic frequencies of the rails in different areas and better conform to actual engineering conditions. Therefore, the adjustable rail vibration absorber has high flexibility and adaptability and is suitable for tracks in different areas. It can achieve ideal vibration and noise reduction effects, reduce the cost of track construction, and reduce the difficulty of later maintenance.

Description of the drawings

Figure 1 is a three-dimensional structural view of a rail and rail vibration absorption system in Embodiment 1 of the present invention;

Figure 2 is a three-dimensional structural view of a rail, a vibration-absorbing wedge and a fixing clip in Embodiment 1 of the present invention; Figure 3 is a cross-sectional view of a rail, a vibration-absorbing wedge and a fixing clip in Embodiment 1 of the present invention;

Figure 4 is a three-dimensional structural view of the fixing clip in Embodiment 1 of the present invention;

Figure 5 is a three-dimensional structural view of the fixing clip in Embodiment 2 of the present invention;

6 is a three-dimensional structural view of a rail and a rail vibration-absorbing system in Embodiment 2 of the present invention; and FIG. 7 is a cross-sectional view of a rail and a vibration-absorbing wedge in Embodiment 3 of the present invention.

Detailed ways

In order to make it easy to understand the technical means, creative features, achieved goals and effects of the present invention, the adjustable rail vibration absorber and rail vibration absorbing system of the present invention are described in detail below with reference to the embodiments and drawings. Parts not described in detail in the examples are well-known techniques in the art.

<Example 1>

Figure 1 is a three-dimensional structural view of a rail and rail vibration absorption system in Embodiment 1 of the present invention.

As shown in Figure 1, this embodiment provides a rail vibration absorption system 100, which is installed on the rail 200 and used to absorb the vibration energy of the rail 200 when the train is running. The rail vibration absorbing system 100 includes an adjustable rail vibration absorber 10 and a fixing clip 20 .

The adjustable rail vibration absorber 10 is used to absorb the vibration energy of the rail 200 and includes a pair of vibration absorbing wedges 11 and a counterweight 12 .

Figure 2 is a three-dimensional structural view of a rail, a vibration-absorbing wedge and a fixing clip in Embodiment 1 of the present invention. Figure 3 is a cross-sectional view of a rail, a vibration-absorbing wedge and a fixing clip in Embodiment 1 of the present invention.

As shown in Figures 2 and 3, the vibration-absorbing wedges 11 are used to fit on both sides of the waist of the rail 200 to absorb the vibration energy of the rail. The vibration-absorbing wedge 11 includes a vibration-absorbing rubber layer 1101 and at least one vibration-absorbing metal piece 1102 wrapped inside the vibration-absorbing rubber layer 1101 . The number of vibration-absorbing metal parts 1102 in this embodiment is one, and the thickness of the vibration-absorbing rubber layer 1101 vulcanized on the surface of the vibration-absorbing metal part 1102 is 3 mm. The vibration-absorbing wedge 11 has a side fitting surface 111 , a bottom fitting surface 112 and a non-fitting surface 113 .

The rail 200 is an I-shaped rail with concave rail waists 201 on both sides. The rail waists 201 have a specific arc structure. The side fitting surface 111 and the bottom fitting surface 112 are shaped to match the rail waist 201, so that the vibration-absorbing wedge 11 can be placed snugly in the rail waist 201. After being snugly placed, the non-fitting surface 113 faces away. One side of the rail 200 and the non-fitting surface 113 is substantially perpendicular to the ground.

A positioning groove 1131 is provided in the middle of the non-fitting surface 113 of the vibration-absorbing wedge 11 . The extension direction of the positioning groove 1131 is consistent with the length direction of the vibration-absorbing wedge 11 , and the length of the positioning groove 1131 is smaller than the length of the vibration-absorbing wedge 11 , that is, at both ends of the length direction of the vibration-absorbing wedge 11 , the positioning groove 1131 is not Through. In this embodiment, the number of positioning grooves 1131 is two, and the two positioning grooves 1131 are respectively provided at 1/3 height and 2/3 height positions in the height direction of the vibration absorbing wedge. The non-fitting surface 113 of the vibration-absorbing wedge 11 is also provided with two mounting holes 1132 . The mounting holes are opened between the two positioning grooves 1131 and are arranged along the length direction of the vibration-absorbing wedge 11 .

The counterweight 12 is detachably connected to the non-fitting surface of the vibration-absorbing wedge 11 for adjusting the vibration frequency of the rail 200 . Two through holes 121 matching the mounting holes 1132 are formed at corresponding positions on the counterweight block 12 . The mounting hole 1132 and the through hole 121 are connected by bolts, so that the counterweight 12 is installed on the vibration absorbing wedge 11 .

In order to improve the stability of the rail, the number of counterweight blocks installed on both sides of the rail should be equal. In this embodiment, based on the characteristic frequency of the rail 200, two counterweight blocks are installed on each side of the rail, two on the same side. The counterweight 12 is connected to the vibration-absorbing wedge 11 in a stacked manner through bolts. In practical applications, for rails 200 with different vibration characteristic frequencies, the number of counterweights 12 provided on both sides of the rail can be adjusted accordingly, and the counterweights can be added or removed, so that the rail vibration absorber 100 can achieve more ideal vibration absorption and reduction. Noise effect. Since only the counterweight 12 needs to be adjusted, there is no need to design and produce vibration-absorbing wedges 11 with different structures, and then remove the fixing clip 20 to replace the vibration-absorbing wedge 11. Therefore, the construction time is shorter and maintenance is more convenient.

In this embodiment, the counterweight block 12 includes a counterweight metal piece and a counterweight rubber layer wrapped around the counterweight metal piece. In practical applications, the counterweight block 12 can also be a metal block whose surface has been treated with anti-corrosion treatment such as galvanizing. . The mass of a single counterweight block 12 is half of the mass of a single vibration-absorbing wedge, and its length is smaller than the length of the positioning groove 1131 of the vibration-absorbing wedge 11 to avoid affecting the installation of the fixing clip 20 . The counterweight block in this embodiment is a rectangular parallelepiped with a length of 360 mm, a width of 20 mm, and a height of 80 mm. The mass of a single counterweight block is 4.5 kg.

Figure 3 is a cross-sectional view of a rail, a vibration-absorbing wedge and a fixing clip in Embodiment 1 of the present invention. Figure 4 is a three-dimensional structural view of a fixing clip in Embodiment 1 of the present invention.

As shown in Figures 3 and 4, the fixing clip 20 is used to fix the adjustable rail vibration absorber 10 on the rail 200. In this embodiment, the fixing clip 20 includes a fixing clip body 21, a positioning claw 22 and an insulating layer 23.

The main body 21 of the fixing clip in this embodiment is an integrally formed piece made of steel or aluminum alloy material. The whole body is roughly in the shape of a triangle with an open top, and the vibration-absorbing wedge 11 is clamped by elastic force. In this embodiment, according to the actual size of the rail 200, the thickness of the fixing clip body 21 is 2.5 mm, the overall length of the fixing clip body 21 in the rail width direction is 146 mm to 163 mm, and the overall length of the fixing clip body in the rail height direction is The length is 110mm~114mm, and the overall width of the fixing clip body in the rail extension direction is 16mm~20mm.

The fixing clip body 21 includes a main plate portion 211 and two side plate portions 212 extending obliquely from both ends of the main plate portion 211 . The connection part 213 between the side plate part 212 and the main plate part 211 is an outwardly convex arc shape, which can better fit the shape of the bottom of the rail 200 during use, and at the same time disperse the force so that the side plate part 212 can Not easy to break.

In this embodiment, each fixing clip 20 has four pairs of positioning claws 22 , and the two positioning claws 22 in each pair are respectively symmetrically arranged on both sides of the side plate portion 212 . Four pairs of positioning claws 22 are arranged opposite each other on the two side plate portions 212. The two pairs of positioning claws 22 on each side plate portion 212 are arranged at a distance of 20 mm along the extension direction of the side plate portion 212, and are respectively connected with the vibration-absorbing wedges. The two positioning grooves 1131 on 11 cooperate to fit and compress the vibration-absorbing wedge 11 .

The insulating layer 23 is provided on the surface of the main plate portion 211 along the length direction of the main plate portion 211 to insulate the fixing clip 20 from the rail 200 . In this embodiment, the insulating layer 23 is made of rubber material and is wrapped on the main board part 211 and the connection part 213 connected to the side plate part 212 using a dip-molding process, so as to better fit the shape of the fixing clip 20 and avoid shifting. bit or fall off.

In this embodiment, the number of fixing clips 20 is two, and the two fixing clips 20 are symmetrically arranged at both ends of the vibration absorbing wedge 11 , so that the adjustable rail vibration absorber 10 is stably installed on the rail 200 .

<Embodiment 2>

The second embodiment provides a rail vibration absorption system, which is different from the first embodiment only in the presence of a fixing clip. For ease of expression, in the second embodiment, the same structures as those in the first embodiment are given the same symbols, and the same descriptions are omitted.

Figure 5 is a three-dimensional structural view of the fixed clip in the second embodiment of the present invention. Figure 6 is a three-dimensional structural view of the rail and the rail vibration absorption system in the second embodiment of the present invention.

As shown in Figures 5 and 6, the fixing clip 20' includes a bracket 21', two sets of locking assemblies 22' and a pair of positioning blocks 23'.

The bracket 21' is an integrally formed part made of steel or aluminum alloy material. The bracket 21' is roughly U-shaped and its cross-section is square. The bracket 21' has a pair of support arms 211' and a connecting section 212' connected between the pair of support arms 211'. A pair of support arms 211' are arranged parallel to each other and are both perpendicular to the connecting section 212'. The connecting portion of the support arm 211' and the connecting section 212' has a convex structure protruding toward the inside of the U-shape as a reinforcing rib 213'.

According to the actual size of the rail 200, the overall length of the bracket 21' in the width direction of the rail 200 is 200mm~225mm; the overall width of the bracket 21' in the length direction of the rail 200 is 16mm~20mm; the length between the pair of support arms 211' The distance (the distance in the width direction of the rail 200) is 160 mm to 185 mm; the length of the support arm 211' in the height direction of the rail 200 is 110 mm.

A plurality of countersunk holes 211a are opened on the support arm 211', and the countersunk holes 211a run through the length direction of the bracket 21' and are used for installing the locking assembly 22'. In this embodiment, each support arm 211' is provided with two countersunk holes 211a arranged longitudinally (that is, arranged along the length direction of the support arm 211').

The locking assembly 22' is used to fix the positioning block 23' on the support arm 211'. In this embodiment, each support arm 211' is provided with a set of locking assemblies 22'. Each set of locking assemblies 22' includes two locking bolts 221', two locking nuts 222' and two locking washers. piece.

The locking bolt 221’ is used to install the positioning block 23’. The locking bolt 221' is installed in the countersunk hole 211a. The nut end of the locking bolt 221' is embedded in the countersunk hole 211a so that the nut end does not protrude from the surface of the bracket 21'. The other end of the locking bolt 221' is fixed in position. Block 23'. The locking nut 222' is sleeved on the locking bolt 221' and used to fix the nut end of the locking bolt 221' in the counterbore 211a. A lock washer is provided between the locking nut 222' and the support arm 211'.

The positioning block 23’ is used to fit and compress the vibration-absorbing wedge 11. The positioning block 23' is made of rubber. Its surface facing the vibration-absorbing wedge 11 is hump-shaped and has two positioning protrusions 231'. The shape and arrangement of the two positioning protrusions 231' are the same as the two positioning protrusions 231' on the vibration-absorbing wedge 11. The positioning grooves 1131 are matched so that the positioning block 23' can be fitted with the non-fitting surface 113 of the vibration-absorbing wedge 11. Therefore, after tightening the locking bolt 221', the positioning block 23' can not only press the vibration-absorbing wedge 11 toward the rail 200 in the horizontal direction, but also because the two positioning protrusions 231' are respectively fitted in the two positioning grooves 1131, Therefore, the vibration-absorbing wedge 11 can also be limited in the vertical direction.

The present invention believes that the number of counterweights 12 in the rail vibration absorption system 100 will affect the vibration attenuation rate of the rail 200, and this is verified through experiments. In the experiment, the rail vibration absorption system 100 of the second embodiment was installed on the rail, and the number of counterweights installed on both sides of the rail was sequentially increased and the rail vibration frequencies were measured at 630Hz, 800Hz, 1000Hz, 1250Hz, 1600Hz, 2000Hz, and 2500Hz. The rail vibration attenuation rate, the experimental results are shown in Table 1 below.

Table 1 Experimental record of the vibration attenuation rate of the rail equipped with the rail vibration absorption system of Embodiment 2

It can be seen from Table 1 that for rails with characteristic frequencies of 630Hz, 1000Hz, 1600Hz and 2000Hz, the vertical vibration attenuation rate is the highest when one counterweight is installed on each side of the rail, and the lateral vibration attenuation rate is the highest after the counterweight is removed. The highest. Considering the vertical and lateral vibration attenuation rates, it is more appropriate to install one counterweight block on each side of the rail. For rails with characteristic frequencies of 800Hz and 1250Hz, the vertical and lateral vibration attenuation rates after removing the counterweight blocks are are the highest, and can achieve better vibration absorption effect; for rails with a characteristic frequency of 2500Hz, when one counterweight is installed on each side of the rail, the vertical and lateral vibration attenuation rates are significantly increased, which can effectively improve the vibration absorption effect.

Therefore, in actual engineering applications, adjusting the number of counterweight blocks installed according to the characteristic frequencies of rails in different areas can make the overall structure of the rail vibration absorption system more suitable for on-site working conditions, thereby achieving a more ideal vibration absorption effect.

<Modification>

This modification provides a rail vibration absorption system, which is different from the second embodiment only in the partial structure of the bracket. In this modification, the plurality of counterbore holes 211a opened on the support arm 211' is changed from the longitudinal arrangement in the second embodiment to a transverse arrangement, that is, the arrangement direction is perpendicular to the length direction of the support arm 211'. The overall width of the bracket 21' along the length direction of the rail 200 is accordingly adjusted to 60mm.

In this embodiment, other structures and effects are the same as those in Embodiment 2, so the description will not be repeated.

The present invention believes that the number of counterweights 12 in the rail vibration absorption system 100 will affect the vibration attenuation rate of the rail 200, and this is verified through experiments. In the experiment, the rail vibration absorption system 100 of this modification was installed on the rail, and the number of counterweights installed on both sides of the rail was sequentially increased and the rail vibration frequencies at 630Hz, 800Hz, 1000Hz, 1250Hz, 1600Hz, 2000Hz, and 2500Hz were measured. Rail vibration attenuation rate, experimental results are shown in Table 2 below.

Table 2 Experimental record of vibration attenuation rate of rails equipped with rail vibration absorption systems of modifications

It can be seen from Table 2 that for rails with characteristic frequencies of 630Hz, 800Hz and 1000Hz, the vertical vibration attenuation rate is the highest after the counterweights are removed, and the lateral vibration attenuation rate is the highest when two counterweights are installed on both sides of the rail. Considering the vertical and lateral vibration attenuation rates, it is more appropriate to install two counterweights on each side of the rail; for rails with characteristic frequencies of 1250Hz, 1600Hz and 2500Hz, the vertical and lateral vibration attenuation rates after removing the counterweights are the highest and can achieve better vibration absorption effect; for a rail with a characteristic frequency of 2000Hz, the vertical vibration attenuation rate is the highest when one counterweight is installed on each side of the rail, and the lateral vibration attenuation rate is the highest after the counterweight is removed. , comprehensively considering the vertical and lateral vibration attenuation rates, using one counterweight block can achieve a better vibration absorption effect.

Therefore, in actual engineering applications, adjusting the number of counterweight blocks installed according to the characteristic frequencies of rails in different areas can make the overall structure of the rail vibration absorption system more suitable for on-site working conditions, thereby achieving a more ideal vibration absorption effect.

<Embodiment 3>

Embodiment 3 provides a rail vibration absorption system, which is different from Embodiment 1 in that it only has vibration-absorbing wedges. For ease of expression, in the third embodiment, the same structures as those in the first embodiment are given the same symbols, and the same descriptions are omitted.

Figure 7 is a cross-sectional view of a rail and a vibration-absorbing wedge in Embodiment 3 of the present invention.

As shown in Figure 7, in the vibration-absorbing wedge 11' of this embodiment, the number of vibration-absorbing metal parts 1102' is three. The three vibration-absorbing metal parts 1102' are arranged obliquely inside the vibration-absorbing rubber layer 1101 and are parallel to each other in the vertical direction. arrangement. The upper surface 114 of the vibration-absorbing wedge is parallel to the upper surface of the uppermost vibration-absorbing metal piece 1102a inside it. The rubber part between adjacent vibration-absorbing metal parts 1102' constitutes a damping body, which can also achieve better rail vibration-absorbing effect. The distance between the middle vibration-absorbing metal piece 1102b and the upper vibration-absorbing metal piece 1102a is greater than the distance between it and the lower vibration-absorbing metal piece 1102c, so that the overall center of gravity of the vibration-absorbing wedge 11 is biased downward. When the vibration-absorbing wedge 11 fits in When the rail waist 201 is located, the vibration-absorbing wedge 11 can be fixedly placed at this position by relying on its own structure and without external force without slipping, thereby making assembly easier.

Embodiment functions and effects

According to the adjustable rail vibration absorber and rail vibration absorption system provided in this embodiment, since the adjustable rail vibration absorber uses a pair of vibration-absorbing wedges to fit on both sides of the waist of the rail, it can effectively absorb the vibration energy of the rail; the counterweight can It is detachably connected to the vibration-absorbing wedge. By adjusting the number of counterweights, the vibration frequency of the rail can be changed to adapt to the vibration characteristic frequencies of rails in different areas and better conform to actual engineering conditions. Therefore, the adjustable rail vibration absorber has high flexibility and adaptability. By adding counterweights, the mass body can be easily changed without having to redesign and manufacture the vibration-absorbing wedges, and then disassemble the fixing clips for replacement. It can be applied to tracks in different areas to achieve ideal vibration and noise reduction effects, reduce the cost of track construction, and reduce the difficulty of later maintenance.

The fixed clip in the first embodiment uses the main body of the fixed clip to cooperate with the positioning claw to press the vibration-absorbing wedge on the rail. Therefore, the clamping force is kept stable and the vibration-absorbing wedge is prevented from being displaced or dropped, thus ensuring the vibration absorption and reduction of the rail vibration absorber. Noise effect, safety and stability, and can reduce the frequency of maintenance and repair, saving manpower and corresponding costs. The positioning claws on the fixed clip cooperate with the positioning grooves on the vibration-absorbing wedge, which can not only press the vibration-absorbing wedge on the rail in the horizontal direction, but also limit the position of the vibration-absorbing wedge in the vertical direction, so that The vibration-absorbing wedge is completely pressed against the rail to ensure its vibration-absorbing and noise-reducing effect. The fixed clip only includes the main body of the fixed clip and the positioning claw. It has a simple structure, is easy to install, has high efficiency of use, and is also more convenient for subsequent maintenance.

In the second embodiment, since the fixed clip adopts a U-shaped structure bracket and a positioning block to press the vibration-absorbing wedge on the rail, its clamping force is stable and can be maintained for a long time, ensuring the vibration-absorbing and noise-reducing effect of the rail vibration absorber and its It is safe and stable, and can reduce the frequency of inspection and maintenance, saving manpower, material resources and corresponding costs. Since the fixing clip only includes an integral metal bracket and two sets of locking components, installation is quick and easy, the labor intensity for workers is relatively lower, and subsequent maintenance is also more convenient. Since the non-fitting surface of the vibration-absorbing wedge has two positioning grooves, and the surface of the positioning block facing the vibration-absorbing wedge has two matching positioning protrusions, when the locking bolt is tightened, the positioning block can not only move the positioning block horizontally The vibration-absorbing wedge is pressed against the rail, and the vibration-absorbing wedge can also be limited in the vertical direction, so that the vibration-absorbing wedge is completely pressed against the rail to ensure its vibration-absorbing and noise-reducing effect.

In the third embodiment, three vibration-absorbing metal parts are arranged obliquely inside the vibration-absorbing rubber layer and are arranged parallel to each other in the vertical direction. The rubber parts between adjacent vibration-absorbing metal parts constitute a damping body, which can also achieve better track vibration absorption. Effect. The vibration-absorbing metal piece in the middle is set at a lower position, so that the overall center of gravity of the vibration-absorbing wedge is lower. When the vibration-absorbing wedge fits at the waist of the rail, the vibration-absorbing wedge can be fixed on the rail by its own structure without external force. This position prevents it from slipping, making assembly easier.

In practical applications, the vibration-absorbing wedges and fixing clips of different structures involved in Embodiments 1, 2, and 3 can be combined and used according to the needs of use, and the correspondingly installed counterweights can be adjusted according to the characteristic frequencies of the rails in different areas. The number of blocks can make the overall structure of the rail vibration absorption system more suitable for on-site working conditions, thereby achieving a more ideal vibration absorption effect.

The above-mentioned embodiments are only used to illustrate specific implementations of the present invention, and the present invention is not limited to the description scope of the above-mentioned embodiments.

For example, in the first embodiment, two 4.5kg counterweight blocks are provided on both sides of the rail. As an alternative, in other embodiments, the mass of a single counterweight block can be smaller, and a larger number of counterweight blocks can be configured accordingly. The weight block facilitates further fine adjustment.

Claims (10)

1. An adjustable rail vibration absorber is characterized by including:

   A pair of vibration-absorbing wedges, used to fit on both sides of the waist of the rail to absorb the vibration energy of the rail; and

   At least one counterweight is detachably connected to the non-fitting surface of the vibration-absorbing wedge for adjusting the vibration frequency of the rail.
2. The adjustable rail vibration absorber according to claim 1, characterized in that:

   Wherein, the surface of the vibration-absorbing wedge facing the counterweight block has at least one positioning groove, and the extending direction of the positioning groove is consistent with the length direction of the vibration-absorbing wedge.
3. The adjustable rail vibration absorber according to claim 2, characterized in that:

   Wherein, the number of positioning grooves provided on a single vibration-absorbing wedge is two,

   The two positioning grooves are respectively provided at 1/3 height and 2/3 height positions in the height direction of the vibration absorbing wedge.
4. The adjustable rail vibration absorber according to claim 3, characterized in that:

   Wherein, the surface of the vibration-absorbing wedge facing the counterweight block has at least two mounting holes, the mounting holes are opened between the two positioning grooves and are arranged along the length direction of the vibration-absorbing wedge,

   The counterweight block has a through hole that matches the mounting hole,

   The mounting hole and the through hole are connected by bolts, so that the counterweight block is installed on the vibration-absorbing wedge block.
5. The adjustable rail vibration absorber according to claim 1, characterized in that:

   Wherein, the counterweight block includes a counterweight metal piece and a counterweight rubber layer wrapped around the counterweight metal piece,

   The mass of a single counterweight is half of the mass of a single vibration-absorbing wedge.
6. The adjustable rail vibration absorber according to claim 1, characterized in that:

   Wherein, the counterweight block is a rectangular parallelepiped,

   The length of the counterweight block is 360mm, the width is 20mm, and the height is 80mm.

   The mass of a single said counterweight is 4.5kg.
7. The adjustable rail vibration absorber according to claim 1, characterized in that:

   Wherein, the vibration-absorbing wedge includes a vibration-absorbing rubber layer and at least one vibration-absorbing metal piece wrapped inside the vibration-absorbing rubber layer.
8. The adjustable rail vibration absorber according to claim 7, characterized in that:

   Wherein, the number of the vibration-absorbing metal parts is three,

   The three vibration-absorbing metal parts are arranged obliquely inside the vibration-absorbing rubber layer and are arranged parallel to each other in the vertical direction.

   The distance between the vibration-absorbing metal piece located in the middle and the vibration-absorbing metal piece above is greater than the distance between it and the vibration-absorbing metal piece below.
9. The adjustable rail vibration absorber according to claim 7, characterized in that:

   Wherein, the number of the vibration-absorbing metal parts is one,

   The thickness of the vibration-absorbing rubber layer is 3mm.
10. A rail vibration absorption system, which is characterized by including:

    Adjustable rail vibration absorbers to absorb rail vibration energy; and

    At least two fixing clips for fixing the adjustable rail vibration absorber on the rail,

    Wherein, the adjustable rail vibration absorber is the adjustable rail vibration absorber described in any one of claims 1-9.

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