Rigidity-damping intrusive steel rail vibration suppression device applied to ballast track

Abstract

The invention discloses a rigidity-damping intrusive steel rail vibration suppression device applied to a ballast track. The device is arranged between fasteners and is used for connecting the bottom of a steel rail and a sleeper. Vibration of the steel rail is restrained by intervening rigidity and damping between the steel rail and a sleeper, the rigidity is used for adjusting the vibration frequency, and the damping is used for absorbing vibration energy. The device can be designed to provide rigidity and damping by elastic materials such as rubber, or to provide rigidity and damping by an air bag layer. When rigidity and damping are provided through the air bag layer, flexible adjustment of the rigidity and the damping can be achieved by adjusting air pressure, and rapid mounting and dismounting of the vibration suppression device can be achieved by controlling inflation and deflation of the air bag layer. The device is simple in structure, outstanding in vibration suppression effect and convenient to install, use and popularize.

Description

Technical Field

[0001] The present invention relates to the field of railway track vibration control, and in particular to a stiffness-damping intervention type rail vibration suppression device applied to ballasted track. The device is mainly used to reduce rail vibration and improve the stability and comfort of the railway track system. Background Art

[0002] Rail vibration not only affects the comfort of train travel, but may also have an adverse effect on the track structure and the surrounding environment, thereby affecting the operational safety and maintenance costs of the railway. Traditional vibration suppression technology has poor control effects and is not convenient to use. In ballasted track systems, due to the complex structural relationship between the track and the foundation, the transmission of vibration energy is relatively complex. Traditional vibration suppression devices often cannot adapt to different vibration frequency and amplitude requirements, and installation and maintenance are relatively cumbersome. Therefore, how to design a vibration suppression device with a simple structure, adjustable performance, easy installation, and strong adaptability has become an urgent problem to be solved in the field of track vibration control.

[0003] The present invention provides a stiffness-damping intervention type rail vibration suppression device applied to ballasted track, which adjusts vibration frequency and energy absorption by intervening stiffness and damping between rails and sleepers, thereby effectively suppressing the vibration of rails and improving the performance and stability of the track system. Summary of the invention

[0004] The purpose of the present invention is to provide a stiffness-damping intervention type rail vibration suppression device for ballasted track, which effectively suppresses the vibration of the rail by intervening the stiffness and damping between the rail and the sleeper, adjusts the vibration frequency and energy absorption, and thus improves the stability and comfort of the railway track system. The device has a simple structure, adjustable performance, and is easy to install, and has a good prospect for promotion and application.

[0005] To achieve the above object, the present invention provides a stiffness-damping intervention type rail vibration suppression device for ballasted track, comprising a vibration suppression layer and a connecting device, wherein:

[0006] 1) The vibration suppression layer provides the required stiffness and damping to effectively suppress the vibration of the rail. The vibration suppression layer adjusts the vibration frequency through its stiffness and absorbs vibration energy through its damping.

[0007] 2) The connecting device connects the vibration suppression layer to the sleeper and to the bottom of the rail, so that the vibration suppression layer can be inserted between the rail and the sleeper to adjust the vibration characteristics.

[0008] According to a preferred embodiment of the present invention, the upper surface of the vibration damping layer is connected to the bottom surface of the rail, and the lower surface is connected to the sleeper through a connecting device. The connecting device can be in various ways, such as abutment connection, bolt connection or through connection, to meet different installation requirements.

[0009] Furthermore, the vibration suppression layer of the present invention can adopt a rubber elastic layer structure; or an assembled semi-wrapped structure; or an airbag layer structure. When the vibration suppression layer is an elastic material such as rubber, an adjusting bolt is provided at the bottom of the vibration suppression layer to adjust the preload force and ensure the stability and vibration suppression effect of the device during use. When the vibration suppression layer is an assembled semi-wrapped structure, the vibration suppression layer is composed of two elastic layers with different stiffnesses, and wraps the bottom of the rail to the waist of the rail. The semi-wrapped structure can provide lateral stiffness and damping to suppress the lateral displacement and vibration of the rail. The high-rigidity elastic layer is located on the outside of the rail, and the low-rigidity elastic layer is located on the inside of the rail. This design can better suppress the lateral displacement of the rail, especially when the train passes through the curve radius. When the vibration suppression layer is an airbag layer structure, the airbag layer is composed of two upper and lower support layers and an intermediate airbag layer, and the support layer and the airbag layer are nested and bonded. By adjusting the inflation and deflation of the airbag, the preload force, stiffness and damping of the vibration suppression device can be flexibly adjusted, and the device can be quickly installed and disassembled.

[0010] The design of the connection device takes into account different installation methods. The abutment type connection abuts against the side of the sleeper through the steel truss structure, the bolt type connection is connected to the sleeper through a fixing block, and the through-type connection passes through the through hole of the sleeper through a metal rod or steel bar.

[0011] The stiffness-damping intervention type rail vibration suppression device of the present invention has the advantages of simple structure, flexible adjustment, and convenient installation, can effectively improve the vibration control performance of the rail, is suitable for different track working conditions, and has good application prospects.

[0012] The stiffness-damping intervention type rail vibration suppression device applied to ballasted track provided by the present invention has the following significant beneficial effects:

[0013] 1) Significant vibration suppression effect

[0014] By interposing stiffness and damping between the rails and the sleepers, the device can effectively adjust the vibration frequency and amplitude of the rails, thereby significantly reducing the vibration amplitude of the rails, reducing vibration transmission in the track system, and improving the stability and comfort of the overall track system.

[0015] 2) Stiffness and damping are adjustable

[0016] The device of the present invention can flexibly adjust the stiffness and damping performance of the airbag layer by adjusting the air pressure to meet different vibration control requirements. The inflation and deflation function of the airbag layer enables the device to achieve rapid adjustment under different working conditions, thereby effectively coping with the influence of different train speeds, load changes and environmental factors on vibration control.

[0017] 3)Easy to install and maintain

[0018] Flexible connection methods (such as abutment connection, bolt connection or through-connection) are adopted to enable the device to be quickly and conveniently connected to the sleeper and rail. Especially when the airbag layer is used, the rapid installation and removal of the vibration suppression device is more convenient, without the need for cumbersome construction procedures, which greatly reduces the complexity and cost of installation and maintenance.

[0019] 4) Simple structure and high reliability

[0020] The device of the present invention has a simple structure, mainly consisting of a vibration suppression layer and a connecting device, and is easy to produce and install. The airbag layer design can ensure that the device maintains efficient vibration suppression performance during long-term use, and can resist the effects of fatigue, aging, etc., and has a long service life.

[0021] 5) Can provide excellent lateral vibration suppression performance

[0022] The semi-wrapped structure can provide lateral stiffness and damping to suppress the lateral displacement, torsion and vibration of the rail. The high-stiffness elastic layer is located on the outside of the rail, and the low-stiffness elastic layer is located on the inside of the rail. This design can better suppress the lateral displacement of the rail, especially when the train passes through the curve radius. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the installation of the vibration suppression device of the abutment type connection in Example 1;

[0024] Figure 2 This is the transverse cross-sectional view of the track after the vibration suppression device is installed;

[0025] Figure 3 This is a schematic diagram of the installation of the bolt-connected vibration suppression device in Example 2;

[0026] Figure 4 This is a schematic diagram of the installation of the through-type connected vibration suppression device in Example 3;

[0027] Figure 5 This is a schematic structural diagram of a vibration suppression device in Example 4 in which the vibration suppression layer is made of elastic material;

[0028] Figure 6 This is a schematic structural diagram of a vibration suppression device in Example 5 in which the vibration suppression layer is a layered nested airbag layer structure;

[0029] Figure 7 It is a cross-sectional view of the vibration suppression device in Example 5, in which the vibration suppression layer is a layered nested airbag layer structure;

[0030] Figure 8 This is a schematic diagram of the installation of a vibration suppression device in Example 6, in which the vibration suppression layer is a spliced ​​semi-wrapped vibration suppression layer structure;

[0031] Fig. 9It is a cross-sectional view of the vibration suppression layer in Example 6 after installation of the spliced ​​semi-wrapped vibration suppression layer structure.

[0032] Markings in the figure: 01-rail, 02-ballast bed, 03-fastener, 04-ballast, 05-bolt, 1-vibration suppression layer, 2-connecting device, 3-base plate, 4-adjusting bolt, 5-outer high-rigidity elastic layer, 6-inner low-rigidity elastic layer, 7-airbag layer, 8-support layer, 9-valve, 10-abutment surface, 11-connecting plane, 12-fixing block. DETAILED DESCRIPTION

[0033] The following are six embodiments of a stiffness-damping intervention rail vibration suppression device applied to ballasted track based on the present invention. These embodiments demonstrate the specific usage and effects of the vibration suppression device in different application scenarios, but this should not be understood as the scope of the above-mentioned subject matter of the present invention being limited to the following embodiments. All technologies implemented based on the content of the present invention belong to the scope of the present invention.

[0034] Embodiment 1: abutment connection structure

[0035] This embodiment adopts an abutment connection method to connect the vibration suppression layer (1) to the sleeper (03) through a connection device (2). The structure is simple and reliable, suitable for working conditions that require rapid installation and disassembly, and is particularly suitable for track systems that require regular adjustment or maintenance.

[0036] Specific implementation process:

[0037] The main body of the connection device (2) adopts a steel truss structure, which has strong bearing capacity and stability. The connection device is provided with an abutment surface (10) and a connection plane (11), wherein the abutment surface (10) is tightly abutted against the side of the sleeper (03), and the connection plane (11) is connected to the vibration suppression layer (1). The pre-tightening force of the connection device (2) ensures that the vibration suppression layer (1) is tightly connected to the track system.

[0038] The advantage of this structure is that it does not require additional fixing equipment and can be fixed by relying on the pre-tightening force of the device itself, which simplifies the installation process. In addition, since there is no complex mechanical structure, disassembly and maintenance are also simpler.

[0039] advantage:

[0040] 1) Quick installation: No complicated tools and equipment are required, the connection device can be fixed by pre-tightening force, reducing the time and labor cost of installation and disassembly.

[0041] 2) Simple structure: This connection method has a simple structure and does not rely on additional fixing parts, which reduces losses and failures.

[0042] 3) Good stability: The abutment connection method ensures the stability of the device and can effectively suppress vibration for a long time.

[0043] Scope of application:

[0044] This embodiment is suitable for railway systems that require rapid deployment and disassembly, especially for temporary tracks or working conditions that require regular maintenance and adjustment.

[0045] Example 2: Bolt connection structure

[0046] In this embodiment, the connection device (2) adopts a bolted connection method. This structure is stable and reliable and is suitable for railway systems with long-term operation, especially for working conditions that require higher pressure resistance.

[0047] Specific implementation process:

[0048] The fixing block (12) of the connecting device (2) is integrally formed with the connecting device body and is made of metal material, which can effectively withstand the vibration and pressure in the track system. The fixing block is fixed to the side of the sleeper by bolts (05) to achieve a stable connection between the vibration suppression device and the sleeper.

[0049] advantage:

[0050] 1) Firm fixation: Bolted connection can ensure long-term stable connection between the device and the sleeper, and is suitable for track systems with high requirements for fixation and compression resistance.

[0051] 2) Strong pressure resistance: The fixed block design provides stronger pressure resistance and can withstand the pressure generated by the passage of heavier trains.

[0052] 3) Long-term stable operation: This connection method is suitable for rail systems in long-term operation, reducing maintenance problems caused by loose connections.

[0053] Scope of application:

[0054] It is suitable for long-term operating track systems such as high-speed railways and heavy-haul railways, especially for track areas with high requirements for vibration control performance.

[0055] Embodiment 3: Through-type connection structure

[0056] In this embodiment, the connection device (2) adopts a through-type connection method, which is suitable for railway systems that require higher stability and strength.

[0057] Specific implementation process:

[0058] The main body of the connection device (2) is composed of two columnar metal rods or steel bars, which penetrate through the preset through holes of the sleeper. Through this through-type design, the connection device can firmly connect the vibration suppression layer (1) and the sleeper (03), while avoiding interference of external forces on the connection parts.

[0059] advantage:

[0060] 1) High-strength connection: The through-type connection method can provide stronger tensile and shear resistance, which is suitable for the high-strength requirements of heavy-load or high-speed railways.

[0061] 2) Strong stability: Through the through-hole design, the connection device is not easy to loosen during the operation of the train, ensuring stable operation for a long time.

[0062] 3) Good adaptability: Suitable for working conditions with high requirements for compression and tension resistance, especially in environments with strong vibration.

[0063] Scope of application:

[0064] This embodiment is suitable for high-speed railways, heavy-load railways and other track systems that require high strength, and can effectively ensure vibration control and track stability during long-term high-intensity operation.

[0065] Embodiment 4: Rubber elastic material vibration suppression layer structure

[0066] In this embodiment, the vibration suppression layer (1) is made of elastic materials such as rubber, and uses its excellent elasticity and damping properties to provide the required stiffness and damping, thereby effectively suppressing the vibration of the rail. The upper surface of the vibration suppression layer (1) is in close contact with the bottom surface of the rail, and the lower surface is connected to the sleeper (03) through a connecting device. A base plate (3) is provided at the bottom of the vibration suppression layer (1), and a plurality of adjustment bolts (4) are provided on the base plate for adjusting the preload force of the vibration suppression layer. By adjusting these bolts, the compression amount of the vibration suppression layer can be accurately controlled, and then its stiffness can be adjusted. The rubber material in this structure provides appropriate stiffness through its elastic properties, and can adjust the vibration frequency. Its good damping performance effectively absorbs vibration energy and reduces the impact of vibration on the track system and the surrounding environment. The rubber material has strong wear resistance, aging resistance and corrosion resistance, and can maintain stable performance for a long time.

[0067] advantage:

[0068] 1) Low cost: Since common rubber materials are used, the cost is relatively low, and the materials are easy to process and manufacture, suitable for large-scale production.

[0069] 2) Simple structure: The device has a simple structure and does not require complex mechanical parts. The installation process is convenient and quick, reducing construction time and cost.

[0070] 3) Flexible adjustment: By adjusting the bolts, the stiffness and preload can be easily adjusted to meet the vibration control requirements under different working conditions.

[0071] 4) Easy maintenance: Due to its simple structure, the maintenance and replacement of the device is relatively convenient, which reduces the maintenance cost in long-term operation.

[0072] Scope of application:

[0073] This embodiment is particularly suitable for ordinary railway systems with low vibration intensity and low requirements, and is suitable for reducing low-frequency vibration of the track and conventional vibration suppression requirements.

[0074] Embodiment 5: Layered nested airbag layer structure

[0075] In this embodiment, the vibration suppression layer (1) adopts a layered nested airbag layer structure. The structure achieves flexible adjustment of stiffness and damping by adjusting the air pressure of the airbag layer (5), and is suitable for working conditions with high requirements for vibration suppression, such as high-speed railways or heavy-load railways. The vibration suppression layer is composed of two upper and lower support layers (6) and an airbag layer (5) in the middle. The support layer (6) is made of metal or high-strength rubber material, and is mainly used to provide structural support for the device, enhance the pressure resistance, and effectively protect the airbag layer (5). The airbag layer (5) is made of highly elastic and corrosion-resistant rubber material. The airbag is filled with gas, and a cord layer or a steel wire reinforcement layer can be provided on the outer surface of the airbag layer (5) to enhance its fatigue resistance and aging resistance.

[0076] The inflation and deflation process of the airbag layer (5) can flexibly adjust the stiffness and damping of the airbag layer. By adjusting the air pressure in the airbag, the performance of the vibration suppression device can be accurately controlled to adapt to different track vibration frequencies and amplitudes. This design can effectively cope with the vibration requirements of high-speed trains or heavy-load trains, and has high adaptability and flexibility.

[0077] advantage:

[0078] 1) Flexible adjustment: By adjusting the air pressure of the airbag layer (5), dynamic adjustment of stiffness and damping can be achieved to adapt to different working conditions, especially suitable for high-speed railways and heavy-load railways.

[0079] 2) Highly efficient vibration suppression: The airbag layer (5) has excellent damping performance and can quickly absorb vibration energy, significantly reducing the impact of vibration on the track system and the surrounding environment.

[0080] 3) High durability: The airbag layer (5) is designed to have high fatigue resistance and aging resistance, and can work stably for a long time, reducing the maintenance frequency.

[0081] Scope of application:

[0082] This embodiment is particularly suitable for high-demand rail systems such as high-speed railways and heavy-load railways, and can effectively suppress high-frequency vibrations generated when trains pass through, thereby improving the running comfort and stability of the rails.

[0083] Example 6: Splicing semi-wrapped vibration suppression layer structure

[0084] In this embodiment, the vibration suppression layer is a spliced ​​semi-wrapped structure, consisting of an outer high-rigidity elastic layer (5) and an inner low-rigidity elastic layer (6). The structural design is intended to suppress the lateral vibration of the rail and limit the torsion of the rail, and is suitable for use in curves or high-frequency vibration environments.

[0085] The high-rigidity elastic layer (5) is located on the outer side of the rail (01) and is mainly used to provide sufficient rigidity to cope with the lateral vibration and lateral deviation of the rail when the train passes. This layer uses a highly elastic, wear-resistant, and anti-aging elastic material (such as hard rubber or polymer material), which can effectively control the lateral deformation of the rail and reduce the amplitude of vibration. The low-rigidity elastic layer (6) is located on the inner side of the rail (01) and is mainly used to provide lower rigidity and higher damping, reduce the vibration transmission on the inner side of the rail, and help absorb the vibration energy generated by the relative movement of the track and the train. The low-rigidity elastic layer uses a softer material (such as soft rubber or elastic synthetic material) to provide flexible support and reduce the vibration rebound on the inner side of the rail. The lower surface of each elastic layer is connected to a bottom plate (3), and the bottom plate and the elastic layer are integrally formed by a vulcanization process. The bottom plate plays a supporting and stabilizing role, and at the same time provides a fixing point for the connecting device. A plurality of bolt holes are arranged on the bottom plate, through which the vibration suppression layer can be fastened to the sleeper (03) through the connecting device (2).

[0086] When the train is running, especially when passing through a curve, the rail (01) will be subjected to a lateral force, causing the rail to deviate outward. In order to suppress this displacement, the spliced ​​semi-wrapped design of the high-rigidity elastic layer (5) and the low-rigidity elastic layer (6) can effectively limit the lateral vibration of the rail and improve the vibration suppression effect. The high-rigidity elastic layer effectively limits the lateral displacement of the rail by providing sufficient rigidity, while the low-rigidity elastic layer reduces vibration rebound through damping and prevents excessive lateral energy transfer.

[0087] The high-rigidity elastic layer and the low-rigidity elastic layer together wrap the bottom to the waist of the rail (01), so that the rail (01) can maintain a stable posture when subjected to external force. Through this design, the lateral swing of the rail (01) can be significantly suppressed, reducing the lateral vibration and noise generated during the running of the train.

[0088] advantage:

[0089] 1) Suppressing the lateral vibration of the rail: The combination of the high-rigidity elastic layer and the low-rigidity elastic layer can effectively suppress the lateral vibration of the rail, especially when traveling on a curve, the outer side deviation of the rail is effectively limited.

[0090] 2) Improve rail stability: By wrapping the rail from the bottom to the waist, the vibration suppression layer provides additional stiffness and damping, preventing the rail from twisting and improving the overall stability of the track.

[0091] 3) Easy installation and maintenance: The fixation of the vibration suppression layer and the sleeper is simple and convenient through bolt connection, which is easy to install and disassemble, and also convenient for later maintenance and adjustment.

[0092] Scope of application:

[0093] This embodiment is particularly suitable for track systems with high requirements such as high-speed railways and heavy-load railways, especially in curved sections of the track or areas where lateral vibrations frequently occur. The vibration suppression device can effectively improve the stability of the train during driving, reduce the adverse effects of vibration, and improve driving comfort and the service life of the track.

Claims

1. A stiffness-damping intervention type rail vibration suppression device for ballasted track, comprising a vibration suppression layer (1), a connecting device (2), characterized in that: The vibration suppression layer (1) provides the rigidity and damping required for vibration suppression, and the connecting device connects the vibration suppression layer (1) to the sleeper (03).

2. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 1, characterized in that: The upper surface of the vibration suppression layer (1) is connected to the bottom surface of the rail (01), and the lower surface is connected to the connection device (2). The connection device (2) is connected to the sleeper (03).

3. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 1, characterized in that: The vibration suppression layer (1) structure is a rubber elastic layer structure, a spliced ​​semi-wrapped structure, or a layered nested airbag layer structure. When the vibration suppression layer (1) is a rubber elastic layer structure, a bottom plate (3) is provided at the bottom of the vibration suppression layer, and an adjusting bolt (4) is provided on the bottom plate. The adjusting bolt can adjust the preload force of the vibration suppression layer. When the vibration suppression layer (1) is a spliced ​​semi-wrapped structure, it is composed of an outer high-rigidity elastic layer (5) and an inner low-rigidity elastic layer (6), and the lower surfaces of the two elastic layers are each connected to a bottom plate (3), the bottom plate and the elastic layer are vulcanized into one, and bolt holes are provided to connect to the connecting device (2) through bolts. When the vibration suppression layer (1) is a layered nested structure layer, it is composed of upper and lower support layers (8) and an intermediate airbag layer (7), and the support layer (8) and the airbag layer (7) are nested and bonded.

4. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 3, characterized in that: The high-rigidity elastic layer (5) is located on the outside of the rail (01), and the low-rigidity elastic layer (6) is located on the inside of the rail (01). Since the rail (01) will deviate outward when the train passes through a curve, this design can better suppress the displacement of the rail. The high-rigidity elastic layer (5) and the low-rigidity elastic layer (6) wrap the bottom waist of the rail on both sides of the rail (01), providing lateral damping and rigidity, which can better suppress the lateral vibration of the rail and limit the torsion of the rail.

5. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 3, characterized in that: The support layer (8) is made of metal, rubber or plastic and other materials. Its main function is to provide stable support, enhance the pressure resistance of the entire device, and protect the airbag layer (7). The airbag layer (7) is located between the two support layers (8) and is provided with a valve (9) made of highly elastic and corrosion-resistant rubber. A cord layer or steel wire is provided to enhance the fatigue resistance and aging resistance of the airbag layer (7). By adjusting the air pressure of the airbag layer (7), the stiffness and damping of the vibration suppression device can be flexibly adjusted. At the same time, the preload force of the vibration suppression device can be adjusted by controlling the inflation and deflation of the airbag layer (7), thereby achieving rapid installation and disassembly.

6. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 1, characterized in that: The connection device (2) has three types of connection: abutment type connection, bolt type connection and penetration type connection.

7. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 6, characterized in that: When the connection device (2) adopts an abutment connection method, the main body of the connection device (2) adopts a steel truss structure and is provided with an abutment surface (10) and a connection plane (11). The abutment surface (10) abuts against the side of the sleeper (03), and the connection plane (11) is connected to the vibration suppression layer (1). The stiffness-damping intervention type rail vibration suppression device is fixed as a whole by the pre-tightening force of the device itself, and installation and disassembly are simple and convenient.

8. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 6, characterized in that: When the connection device (2) is connected by bolts, the connection device (2) is provided with a fixing block (12), the fixing block (12) is integrally formed with the connection device (2) body, is made of metal material, and is fixed to the side of the sleeper by bolts, thereby realizing the connection between the vibration suppression device and the sleeper (03).

9. The stiffness-damping intervention type rail vibration suppression device for ballasted track according to claim 6, characterized in that: When the connecting device (2) adopts a through-type connection method, the main body of the connecting device (2) is two columnar metal rods or steel bars, which penetrate through prefabricated through holes on the sleeper. A connecting plane (11) is provided, and the connecting plane (11) is connected to the vibration suppression layer (1).

10. A stiffness-damping intervention type rail vibration suppression device for ballasted track according to any one of claims 1 to 9, characterized in that: Two adjacent spring-clip fasteners (03) are arranged at intervals along the longitudinal direction of the rail (01).

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