Vibration reduction system with particle damping for continuously supporting steel rail

Abstract

The invention discloses a vibration reduction system with particle damping for continuously supporting a steel rail, which realizes a solution for continuously supporting the steel rail and can continuously provide vertical, longitudinal and transverse supporting rigidity of the steel rail. By configuring particle damping, the problems of Pinned-Pinned resonance of the steel rail, large wheel rail noise radiation, natural vibration of the steel rail and the like in the prior art are solved; the system continuously provides lateral limiting for the steel rail, the stress concentration problem of the fastener and the steel rail is relieved, and the problems that the fastener structure is large in maintenance amount and the like are greatly solved; according to the continuous support, the continuity of the transverse rigidity of the fastener system is guaranteed, the transverse stability of the steel rail is improved and enhanced, and therefore the defect that the transverse stability of the fastener system is poor is effectively overcome.

Description

Technical Field

[0001] The invention belongs to the field of vibration and noise control of rail transit, and in particular is a vibration reduction system of a continuous support rail with particle damping. Background Art

[0002] In the field of rail transit, fastener systems are generally used to fix the spatial relationship between rails and sleepers, ensure the geometric shape of the track, limit the vertical, longitudinal and lateral displacement of the rails, provide support stiffness, and prevent the rails from tipping over. The fastener system should be able to effectively maintain a reliable connection between the rails and sleepers for a long time, and give full play to its buffering and vibration reduction performance under dynamic action to delay the accumulation of residual deformation of the track. Therefore, it is required to have sufficient strength, durability and elasticity. In the use state, whether there is a stress concentration state on the rails, the vibration reduction and buffering performance of the fasteners are closely related to maintaining a good wheel-rail relationship, smoothness of operation, etc.

[0003] Most existing rail transit fastener systems use discrete point supports, lacking necessary and continuous support structures along the longitudinal direction of the line, which leads to weaknesses such as low lateral stiffness, concentrated action points, discontinuous lateral stiffness, large lateral displacement of rails, poor anti-overturning ability, and poor lateral stability. Due to this discontinuous support structure, problems such as Pinned-Pinned resonance and large wheel-rail noise radiation occur in existing rails.

[0004] In contrast, there is no reasonable continuous support structure in the existing technology. If a continuous support structure is set on the existing sleepers, excessive vibration will accelerate the damage of the entire system, and the practicality is too low.

[0005] For the above reasons, the inventors have designed a vibration reduction system for a continuous support rail with particle damping based on theoretical research and extensive investigations in view of the above engineering problems, in the hope of realizing the practical application of the continuous support structure through the device. Summary of the invention

[0006] In order to overcome the above problems, the inventors have conducted intensive research and designed a vibration reduction system with particle damping for continuously supporting rails. The system realizes a solution for continuous support of rails and can continuously provide vertical, longitudinal and lateral support stiffness of the rails. By configuring particle damping, the problems of PinnedPinned resonance of rails, large wheel-rail noise radiation, and self-vibration of rails in the prior art are solved. The system continuously provides lateral limitation for the rails, alleviates the stress concentration problem of fasteners and rails, and greatly improves the problem of high maintenance volume of fastener structures. The continuous support ensures the continuity of the lateral stiffness of the fastener system, improves and enhances the lateral stability of the rails, thereby effectively improving the disadvantage of poor lateral stability of the fastener system, thereby completing the present invention.

[0007] Specifically, the object of the present invention is to provide a vibration reduction system for a continuous support rail with particle damping, the vibration reduction system comprising a support steel beam 2 arranged below the rail (1), the support steel beam 2 being embeddedly mounted on a track plate or a sleeper 3;

[0008] On the upper surface of the track plate or sleeper 3, a groove 31 for accommodating and installing the supporting steel beam 2 is provided along the extending direction of the rail;

[0009] The supporting steel beam 2 includes a top plate 21, a bottom plate 22 and two side plates 23 which are consolidated into one;

[0010] The top plate 21, the bottom plate 22 and the two side plates 23 together surround and form a cavity 4.

[0011] The cavity is filled with damping particles 6, which are selected from one or more of iron sand, lead particles, steel balls, and sand;

[0012] The vibration energy is consumed by the collision and friction between the damping particles and the wall of the cavity 4 and the collision and friction between the damping particles.

[0013] The side plate 23 extends upwards by a predetermined distance relative to the top plate 21.

[0014] A support pad 5 is provided between the steel rail 1 and the support steel beam 2, that is, the support pad 5 is sandwiched between two side plates 23;

[0015] By selecting a support pad 5 of appropriate thickness, the plurality of rails are placed at the same level, and by selecting a support pad 5 of appropriate stiffness, it is matched with the overall vibration reduction system.

[0016] The top plate 21, the bottom plate 22 and the side plate 23 are sealed and connected to each other, so that the cavity 4 is a closed cavity, and the inside of the cavity 4 is dry to prevent liquid from entering.

[0017] The supporting steel beam 2 is continuously installed on the track plate or the sleeper 3 along the length direction of the rail.

[0018] A groove is provided on the upper surface of the track plate or the sleeper 3, and the support steel beam 2 is embedded and installed in the groove;

[0019] The width of the groove is slightly larger than the width of the supporting steel beam 2, and the gap therebetween is filled with cement slurry or polymer sealing material.

[0020] Among them, a sealing glue is arranged between the support pad 5 and the rail 1, and between the support pad 5 and the supporting steel beam 2. The rail 1, the support pad 5 and the supporting steel beam 2 are connected into a whole by the sealing glue, so that the vibration of the rail 1 is transmitted to the supporting steel beam 2, and the vibration generated by the supporting steel beam 2 is fed back to the rail 1.

[0021] Wherein, in the cavity 4, the volume proportion of the damping particles is 80-90%.

[0022] Preferably, in the cavity 4, the particle size of the damping particles is 0.1-0.5 mm.

[0023] A fastener 6 is provided on the upper side of the supporting steel beam 2 , and the steel rail 1 is fixed together by the fastener 6 and the supporting steel beam 2 .

[0024] The beneficial effects of the present invention include:

[0025] (1) The vibration reduction system of the continuous support rail with particle damping provided by the present invention uses a continuous support structure, and the number of fastener systems can be greatly reduced, thereby reducing the construction difficulty and maintenance cost;

[0026] (2) The vibration reduction system of the continuous support rail with particle damping provided by the present invention can continuously provide vertical, longitudinal and lateral support stiffness of the rail to prevent the rail from tipping over;

[0027] (3) The vibration reduction system of the continuous support rail with particle damping provided by the present invention has sufficient strength, durability and elasticity, so that the fastener system can effectively maintain the reliable connection between the rail and the sleeper for a long time, and can give full play to its buffering and vibration reduction performance under dynamic action, delaying the accumulation of residual deformation of the track;

[0028] (4) The vibration reduction system of the continuous support rail with particle damping provided by the present invention does not have stress concentration on the rail, the wheel-rail relationship is good, and the train runs smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A cross-sectional view of a vibration reduction system of a continuous support rail with particle damping provided by the present invention is shown;

[0030] Figure 2 A schematic diagram of a vibration reduction system pad of a continuous support rail with particle damping provided by the present invention is shown;

[0031] Figure 3 A schematic diagram of a supporting steel beam of a vibration reduction system of a continuous supporting rail with particle damping provided by the present invention is shown;

[0032] Figure 4A schematic diagram of a track plate or sleeper of a vibration reduction system for a continuous support rail with particle damping provided by the present invention is shown.

[0033] Figure 5 An exploded view of the vibration reduction system accessories of the continuous support rail with particle damping provided by the present invention is shown.

[0034] Reference numerals

[0035] 1- Rails

[0036] 2-Supporting steel beam

[0037] 21-Top plate

[0038] 22- Bottom plate

[0039] 23-Side panels

[0040] 3- Track slab or sleeper

[0041] 31-Groove

[0042] 4- Cavity

[0043] 5-Support pad

[0044] 6- Damping particles DETAILED DESCRIPTION

[0045] The present invention will be further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become more clear and distinct.

[0046] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0047] The present invention provides a vibration reduction system for a continuous support rail with particle damping, such as Figure 1 , Figure 2 and Figure 3 As shown in , the vibration reduction system includes a support steel beam 2 arranged under the rail 1, and the support steel beam 2 is embedded in the track plate or sleeper 3; the track plate or sleeper 3 in the present application is a prefabricated concrete beam, and a groove 31 for accommodating the installation of the support steel beam 2 is opened on its upper surface along the extension direction of the rail. During construction, it can be directly laid on the base after adjusting the position, and the construction steps are simple and the construction efficiency is high. Among them, the support steel beam 2 and the track plate or sleeper 3 can be prefabricated as a whole in the factory, or fixedly installed as a whole at the construction site.

[0048] The track plate or sleeper 3 in the present application is the supporting structure under the rails in the track system, which extends along the extension direction of the rails so that a groove can be opened and the supporting steel beam can be installed. Before the groove is opened, the specific structural shape can also be consistent with any one of the following existing structures: concrete sleepers, longitudinal sleepers, trapezoidal sleepers, track plates, frame track plates, and floating plates.

[0049] The support steel beam 2 includes a top plate 21, a bottom plate 22 and two side plates 23 which are consolidated into one body; each plate of the support steel beam 2 can be selected as a steel plate and connected and fixed by welding.

[0050] The cavity is filled with damping particles 6, which are selected from one or more of iron sand, lead particles, steel balls, and sand. The inventors found that the preferred order of damping particle materials is: lead, steel, iron, sand, etc. Appropriate damping particles can be selected according to vibration reduction performance requirements and economy.

[0051] In the present application, preferably, the damping particles are approximately spherical in shape. The spherical shape can make the collision vibration between each other more irregular, and the overall vibration reduction effect is the best. More preferably, the particle size of the damping particles is 0.1-1 mm, preferably 0.2-0.4 mm; the particle sizes of the multiple damping particles filled in a cavity may not be completely consistent with each other, as long as they are all within the specified range. The inventors have found that when the particle size is controlled within the above-mentioned 0.2-0.4 mm, the overall vibration reduction effect is best.

[0052] The vibration energy is consumed by the collision and friction between the damping particles 6 and the wall of the cavity 4 and the collision and friction between the damping particles.

[0053] In a preferred embodiment, Figure 1 As shown in FIG. , the side plate 23 extends upwardly by a predetermined distance relative to the top plate 21.

[0054] A support pad 5 is provided between the rail 1 and the supporting steel beam 2, that is, the support pad 5 is sandwiched between the two side plates 23; the support pad 5 is a steel plate or an elastic pad, and has multiple models, and different models have different thicknesses, and correspondingly, different rigidities, so as to adapt to different working conditions;

[0055] By selecting a support pad 5 of appropriate thickness, multiple rails are placed at the same level, and by selecting a support pad 5 of appropriate stiffness, it matches the vibration reduction system as a whole. The support pad 5 can also be placed at the bottom of the supporting steel beam 2 so that the height of the top of the side plate 23 is flush with the lower flange of the rail 1. With this structural design, the two side plates 23 clamp the rail 1 on both sides, while the support pad 5 supports the rail below, and in combination with a limit mechanism such as a fastener, the rail can be completely fixed in all directions.

[0056] In the present application, the main part of the side plate 23 is embedded in the track plate or the sleeper 3 along with the supporting steel beam 2, and a small protruding portion is located on both sides of the rail. This design allows the protruding portion to limit the lateral displacement of the rail, provide lateral rigidity and support for the steel pipe, ensure that the lateral rigidity of the track system is large enough, and ensure the long-term stable operation of the track system.

[0057] In a preferred embodiment, the top plate 21, the bottom plate 22 and the two side plates 23 together surround and form a cavity 4. It should be emphasized that since the length of the supporting steel beam can be infinitely long and consistent with the length of the rail, no end plate is required; the top plate 21, the bottom plate 22 and the side plates 23 are sealed and connected to each other, preferably by welding, so that the cavity 4 is a closed cavity, and the interior of the cavity 4 is dry to prevent liquid from entering.

[0058] In a preferred embodiment, the support steel beam 2 is continuously installed on the track plate or the sleeper 3 along the length direction of the rail. Figure 1 as shown in .

[0059] A groove is provided on the upper surface of the track plate or the sleeper 3, and the support steel beam 2 is embedded and installed in the groove;

[0060] The width of the groove is slightly larger than the width of the supporting steel beam 2, and the gap therebetween is filled with cement slurry or polymer sealing material. That is, after the supporting steel beam 2 is placed, the gap between the supporting steel beam 2 and the groove is filled and sealed with cement slurry or polymer sealing material.

[0061] In a preferred embodiment, a sealing glue is provided between the support pad 5 and the rail 1, and between the support pad 5 and the support steel beam 2 to play a sealing role. The rail 1, the support pad 5 and the support steel beam 2 are connected into a whole through the sealing glue, thereby transmitting the vibration of the rail 1 to the support steel beam 2, and feeding back the vibration generated by the support steel beam 2 to the rail 1.

[0062] Since the supporting steel beam 2 is equipped with a particle damping system, the phase of its vibration obviously "lags behind" the vibration of the rail 1, thereby achieving a phase difference in vibration, offsetting the energy of the vibration, and allowing the vibration of the rail 1 to decay rapidly.

[0063] Preferably, in the cavity 4, the volume proportion of the damping particles 6 is 80-90%, preferably about 85%. The applicant has found that according to the vibration characteristics of the railway system, a volume proportion of about 85% has the best vibration reduction performance and can maximize the vibration reduction effect.

[0064] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.

Claims

1. A vibration reduction system for a continuous support rail with particle damping, characterized in that: The vibration reduction system comprises a supporting steel beam (2) arranged below a steel rail (1), wherein the supporting steel beam (2) is embedded in a track plate or a sleeper (3); A groove (31) for accommodating and installing the supporting steel beam (2) is provided on the upper surface of the track plate or the sleeper (3) along the extending direction of the steel rail; The supporting steel beam (2) comprises a top plate (21), a bottom plate (22), and two side plates (23) which are consolidated into one body; The top plate (21), the bottom plate (22) and the two side plates (23) together surround and form a cavity (4). The cavity is filled with damping particles (6), wherein the damping particles are selected from one or more of iron sand, lead particles, steel balls, and sand; Vibration energy is consumed by collision and friction between the damping particles and the wall surface of the cavity (4), and collision and friction between the damping particles (6).

2. The vibration reduction system of the continuous support rail with particle damping according to claim 1, characterized in that: The side plate (23) extends upward by a predetermined distance relative to the top plate (21). A support pad (5) is provided between the steel rail (1) and the supporting steel beam (2), that is, the support pad (5) is sandwiched between two side plates (23); By selecting a support pad (5) of suitable thickness, a plurality of rails are placed at the same level; and by selecting a support pad (5) of suitable rigidity, the support pad (5) is matched with the vibration reduction system as a whole.

3. The vibration reduction system of the continuous support rail with particle damping according to claim 2, characterized in that: The top plate (21), the bottom plate (22) and the side plate (23) are sealed and connected to each other, so that the cavity (4) is a closed cavity, and the interior of the cavity (4) is dry to prevent liquid from entering.

4. The vibration reduction system of the continuous support rail with particle damping according to claim 1, characterized in that: The supporting steel beam (2) is continuously installed on the track plate or the sleeper (3) along the length direction of the steel rail.

5. The vibration reduction system of the continuous support rail with particle damping according to claim 4, characterized in that: A groove is provided on the upper surface of the track plate or the sleeper (3), and the supporting steel beam (2) is embedded and installed in the groove; The width of the groove is slightly larger than the width of the supporting steel beam (2), and the gap therebetween is filled with cement slurry or polymer sealing material.

6. The vibration reduction system of the continuous support rail with particle damping according to claim 1, characterized in that: A sealing adhesive is provided between the support pad (5) and the rail (1), and between the support pad (5) and the support steel beam (2). The steel rail (1), the support pad (5) and the support steel beam (2) are connected into a whole by the sealing adhesive, so that the vibration of the rail (1) is transmitted to the support steel beam (2), and the vibration generated by the support steel beam (2) is fed back to the rail (1).

7. The vibration reduction system of the continuous support rail with particle damping according to claim 1, characterized in that: In the cavity (4), the volume of the damping particles (6) accounts for 80 to 90%. Preferably, in the cavity (4), the particle size of the damping particles (6) is 0.1 to 1 mm.

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