Floating slab track structure based on particle damper
By adopting a floating plate track structure based on particle dampers in rail transit, the problem that the prior art is difficult to effectively isolate low-frequency vibration energy is solved, and better vibration reduction and noise reduction effect and the robustness of the track structure are achieved.
Patent Information
- Application Number
- CN202420816487.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-19
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-04-19
AI Technical Summary
In existing rail transit, the steel spring floating plate vibration isolation technology is difficult to effectively isolate low-frequency vibration energy, resulting in excessive noise in the vehicle and mechanical diseases, and the particle damping technology has poor vibration damping effect in the low-frequency range.
The floating plate track structure based on particle dampers is adopted. By symmetrically arranging the particle dampers in the middle or both sides of the floating plate, the interaction of damping particles in the damper cavity is used to broaden the frequency range and enhance the damping performance of the track structure.
Effective isolation and dissipation of low-frequency vibration energy is achieved, significantly reducing the occurrence of in-vehicle noise and mechanical diseases, and improving the robustness and maintenance convenience of the track structure.
Smart Images
Figure CN222796099U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of track vibration reduction, in particular to a floating plate track structure based on a particle damper. Background Art
[0002] In recent years, my country's rail transit has continued to develop rapidly. During rail operation, problems such as mechanical diseases of the wheel-rail system, vehicle body vibration and noise inside the vehicle occur. To solve this problem, the vibration energy is generally isolated or dissipated in the transmission path of the vibration energy to achieve the purpose of vibration reduction and noise reduction.
[0003] The steel spring floating plate vibration isolation technology currently used can effectively isolate vibration energy in the medium and high frequency range, but this isolated part of the energy will cause excessive noise in the car and mechanical defects such as spring bar breakage, rail corrugation, and shear hinge damage; for low-frequency vibration energy that cannot be isolated, it has a strong penetration ability in the soil and can be transmitted to buildings along the line to cause vibration and secondary radiation noise. Particle damping technology is suitable for extreme environments such as weightlessness, high temperature, high pressure, and high radiation. Particle dampers are the practical application of particle damping technology. When the main structure is excited to vibrate, the particles in the cavity will be excited, and the energy transfer and dissipation will be completed through the interaction between particles and particles, and between particles and cavities, thereby reducing the vibration of the main structure, and can effectively widen the frequency range, with obvious vibration reduction effect. Utility Model Content
[0004] The purpose of the present utility model is to improve the defects of the above-mentioned prior art and provide a floating plate track structure based on a particle damper. The floating plate track structure achieves a more excellent track structure damping characteristic on the basis of ensuring the vibration isolation performance of the floating plate by adding particle damping, and achieves a more excellent vibration reduction and noise reduction effect by improving the damping performance. It has strong robustness and is easy to maintain. Damping particles are suitable for harsh environments such as high temperature and high pressure, and can effectively widen the frequency range. The present utility model achieves a more excellent track structure damping performance on the basis of ensuring the vibration isolation effect of the floating plate by adding damping particles.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A floating plate track structure based on a particle damper, wherein the floating plate track structure is arranged above a roadbed, and comprises a steel rail, a floating plate and a particle damper.
[0007] Two steel rails are symmetrically arranged above the floating plate, the bottom of the floating plate is connected to the roadbed through a vibration isolator, and particle dampers are symmetrically arranged in the middle or on both sides of the floating plate.
[0008] The particle damper comprises a damper cavity and damping particles. The damping particles are arranged in the damper cavity and are used to broaden the frequency range and isolate vibration energy.
[0009] In one embodiment of the utility model, the vibration isolator includes a top cover, a bottom plate and a sleeve, the top end of the sleeve is provided with a top cover, the bottom end of the sleeve is provided with a bottom plate, and the sleeve is provided with an outer ring steel spring and an inner ring steel spring.
[0010] The two ends of the outer ring steel spring and the inner ring steel spring are respectively installed between the top cover and the bottom plate, and the inner ring steel spring is located inside the outer ring steel spring.
[0011] In one implementation of the utility model, a rubber protective sleeve is provided on the sleeve, and the sleeve is filled with damping liquid.
[0012] In one embodiment of the present invention, the rail is fixed above the floating plate through a plurality of fastener units.
[0013] In one embodiment of the present invention, the fastener unit includes a base, a bonding pad, a spring bar, a rail pad, an anchor bolt and an insulating sleeve.
[0014] The bottom end of the rail is provided with a rail pad, the lower part of the rail pad is provided with a bonding pad, the lower part of the bonding pad is provided with a base, and the base is arranged above the floating plate.
[0015] One end of the spring bar is buckled on the rail, and the other end of the spring bar is buckled on the bonding pad.
[0016] The bonding pad is provided with an anchor bolt, and the anchor bolt is penetrated by a spring washer, an insulating sleeve and a flat washer.
[0017] In one implementation of the utility model, a rail height adjustment pad is provided at the bottom end of the rail, and a bonding pad height adjustment pad is provided under the bonding pad.
[0018] In one implementation of the utility model, a T-bolt is also provided on the bonding pad.
[0019] In one embodiment of the utility model, damper installation grooves are symmetrically provided in the middle position or on both sides of the floating plate, and the particle damper is fixed in the damper installation grooves.
[0020] In an implementation manner of the utility model, the particle damper and the damper mounting groove are fixed by bolt connection, riveting, pin connection or integral casting.
[0021] In an embodiment of the present utility model, the damper installation groove includes different shapes such as a rectangular groove or a circular groove.
[0022] In one embodiment of the present invention, the damper cavity shape structure includes a single cavity, a multi-cavity or a honeycomb structure.
[0023] In one embodiment of the utility model, a damping particle filling port is provided on the surface of the damper cavity, and the damping particle filling port is used to fill or replace damping particles. The damping particle filling port is threadedly connected or provided with a lock, which has a simple structure, reliable connection, and easy assembly and disassembly.
[0024] In one embodiment of the utility model, a damping material layer is provided inside the damper cavity, and the damping material layer is used to increase the overall damping performance of the particle damper.
[0025] In one embodiment of the utility model, the surface of the damping particles is coated with a damping material layer, and the damping material layer is used to increase the overall damping performance of the particle damper. The damping material layer is made of damping material, and the damping material includes rubber, foam plastic, polyurethane and polymer resin.
[0026] In one embodiment of the utility model, the material of the damping particles is selected from any one or more combinations of metal or non-metal materials such as iron-based alloys, ceramics, rubber, polyurethane, tungsten carbide, etc.;
[0027] The diameter of the damping particles ranges from 1 to 50 mm;
[0028] The shape of the damping particles is spherical or polyhedral;
[0029] The filling rate of the damping particles in the damper cavity is 10-90%.
[0030] In one embodiment of the present invention, the damping particles are multi-graded damping particles formed by different diameter sizes.
[0031] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0032] (1) Safe and reliable: The design of the damper in the utility model can be combined with the structural characteristics of the floating plate, drawing on existing engineering experience, and symmetrically arranging the dampers at the middle position of the floating plate at an equal distance from the rail or on both sides of the plate. The damping particles are filled in a closed cavity, and there will be no accidents such as popping out and injuring people. In addition, particle damping can effectively broaden the frequency range, and the vibration reduction effect is obvious;
[0033] (2) Strong robustness: The particle damper device can be selected according to the needs and is suitable for extreme environments such as high temperature, high pressure, and high radiation. It can also be used in the weightless environment of space.
[0034] (3) Low price: The material of the cavity structure of the damper of the utility model is mostly iron-based alloy, and the material of the damping particles is usually iron-based alloy, ceramic, glass, rubber, polyurethane, tungsten carbide, lead and other metal or non-metal materials. The raw materials are easy to obtain and the price is cheap.
[0035] (4) Easy maintenance: The particle damper can be installed in the mounting groove on the surface of the floating plate. The components of the utility model are mostly fixed with bolts, which is convenient for component replacement; the filling port is designed on the surface of the damper to facilitate the filling and replacement of damping particles. BRIEF DESCRIPTION OF THE DRAWINGS
[0036] Figure 1 It is a cross-sectional view of the floating plate track structure with embedded multi-cavity particle damper;
[0037] Figure 2 A top view of a floating plate track structure with a multi-cavity particle damper embedded in it;
[0038] Figure 3 The overall structural diagram of the floating plate track structure with embedded multi-cavity particle damper is shown;
[0039] Figure 4 A cross-sectional view of a floating plate track structure with an embedded single-cavity particle damper.
[0040] Figure 5 It is the structural schematic diagram of the vibration isolator;
[0041] Figure 6 for Figure 5 Cross-section of the inner cylinder of AA in the vibration isolator;
[0042] Figure 7 It is a structural diagram of the fastener unit, wherein the left view shows a state where the height-adjusting pad is not set, and the right view shows a state where the height-adjusting pad is set.
[0043] Explanation of the accompanying figures: 1. Fastener unit, 11. Bonding pad, 12. Spring bar, 13. T-bolt, 14. Pad under rail, 15. Pad under rail for height adjustment, 16. Anchor bolt, 17. Pad under bonding pad for height adjustment, 18. Insulating sleeve, 2. Rail, 3. Floating plate, 4. Roadbed, 5. Vibration isolator, 51. Top cover, 52. Rubber protective cover, 53. Outer ring steel spring, 54. Inner ring steel spring, 55. Damping liquid, 56. Bottom plate, 57. Sleeve, 6. Damper mounting groove, 7. Damper cavity, 8. Damping particles, 9. Locking plate, 10. Damping particle filling port. DETAILED DESCRIPTION
[0044] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.
[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0046] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.
[0047] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0048] In conjunction with the accompanying drawings, some embodiments of the present utility model are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0049] Example 1
[0050] See also Figures 1 to 3 This embodiment provides a floating plate track structure based on a particle damper. The floating plate track structure is arranged above a roadbed 4. The floating plate track structure includes a steel rail 2, a floating plate 3 and a particle damper. Two steel rails 2 are symmetrically arranged above the floating plate 3. The floating plate 3 is connected to the roadbed 4 through a vibration isolator 5 below. Particle dampers are symmetrically arranged in the middle or on both sides of the floating plate 3.
[0051] The particle damper comprises a damper cavity 7 and damping particles 8. The damper cavity 7 is provided with damping particles 8, and the damping particles 8 are used to broaden the frequency range and isolate vibration energy.
[0052] In this embodiment, the vibration isolator 5 includes a top cover 51, a bottom plate 56 and a sleeve 57. The top of the sleeve 57 is provided with the top cover 51, the bottom of the sleeve 57 is provided with the bottom plate 56, and the sleeve 57 is provided with an outer ring steel spring 53 and an inner ring steel spring 54.
[0053] The two ends of the outer ring steel spring 53 and the inner ring steel spring 54 are respectively installed between the top cover 51 and the bottom plate 56 , and the inner ring steel spring 54 is located inside the outer ring steel spring 53 .
[0054] In this embodiment, a rubber protective sleeve 52 is provided on the sleeve 57 , and the sleeve 57 is filled with a damping liquid 55 .
[0055] In this embodiment, the rail 2 is fixed above the floating plate 3 by four fastener units 1 .
[0056] In this embodiment, the fastener unit 1 includes a base, a bonding pad 11, a spring bar 12, a rail pad 14, an anchor bolt 16 and an insulating sleeve 18.
[0057] The bottom end of the steel rail 2 is provided with a rail pad 14, the lower part of the rail pad 14 is provided with a bonding pad 11, the lower part of the bonding pad 11 is provided with a base, and the base is arranged above the floating plate 3.
[0058] One end of the spring bar 12 is buckled on the rail 2, and the other end of the spring bar 12 is buckled on the bonding pad 11.
[0059] The bonding pad 11 is provided with an anchor bolt 16 , and the anchor bolt 16 is penetrated by a spring washer, an insulating sleeve 18 , and a flat washer.
[0060] In this embodiment, the floating plate 3 is a prefabricated short plate, and damper mounting grooves 6 are designed on both sides of the floating plate 3 , and the particle damper is fixed in the damper mounting grooves 6 .
[0061] In this embodiment, the damper installation groove 6 is a rectangular groove, and the particle damper and the damper installation groove 6 are integrally fixed by casting.
[0062] In this embodiment, the particle damper includes a damper cavity 7 and damping particles 8, and the material of the damper cavity 7 and the damping particles 8 is Q235.
[0063] In this embodiment, the damper cavity 7 is a four-layer multi-cavity structure, and both ends of each layer of partitions are welded to the inner surface of the damper cavity 7. The outer surface of the damper cavity 7 is provided with a damping particle filling port 10 for filling and replacing damping particles.
[0064] In this embodiment, the damping particles 8 are mixed with particles of different sizes such as Φ5 mm and Φ10 mm to form a multi-graded form, and the material of the damping particles 8 is ordinary carbon steel.
[0065] In this embodiment, the surface of the damping particles 8 is coated with damping material to enhance the damping performance of the track structure.
[0066] Example 2
[0067] See also Figure 4 This embodiment provides a floating plate track structure based on a particle damper, which is the same as Embodiment 1 except that the damper cavity 7 is a single cavity structure.
[0068] Example 3
[0069] See also Figure 7 This embodiment provides a floating plate track structure based on a particle damper. In addition to the rail height adjustment pad 15 provided at the bottom end of the steel rail 2, a bonding pad height adjustment pad 17 is provided under the bonding pad 11, and a T-bolt 13 is also provided on the bonding pad 11. The rest is the same as Example 1.
[0070] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.
Claims
1. A floating plate track structure based on a particle damper, characterized in that: The floating plate track structure is arranged above the roadbed (4), and comprises a steel rail (2), a floating plate (3) and a particle damper. Two steel rails (2) are symmetrically arranged above the floating plate (3); the bottom of the floating plate (3) is connected to the roadbed (4) via a vibration isolator (5); particle dampers are symmetrically arranged in the middle or on both sides of the floating plate (3); The particle damper comprises a damper cavity (7) and damping particles (8); the damping particles (8) are arranged in the damper cavity (7); the damping particles (8) are used to broaden the frequency range and isolate vibration energy; A damping material layer is provided inside the damper cavity (7), and / or, The surface of the damping particles (8) is coated with a damping material layer, and the damping material layer is used to increase the overall damping performance of the particle damper.
2. A floating plate track structure based on a particle damper according to claim 1, characterized in that: The vibration isolator (5) comprises a top cover (51), a bottom plate (56) and a sleeve (57); the top end of the sleeve (57) is provided with the top cover (51); the bottom end of the sleeve (57) is provided with the bottom plate (56); an outer ring steel spring (53) and an inner ring steel spring (54) are provided inside the sleeve (57); The two ends of the outer ring steel spring (53) and the inner ring steel spring (54) are respectively installed between the top cover (51) and the bottom plate (56), and the inner ring steel spring (54) is located inside the outer ring steel spring (53); The sleeve (57) is provided with a rubber protective sleeve (52), and the sleeve (57) is filled with a damping liquid (55).
3. A floating plate track structure based on a particle damper according to claim 1, characterized in that: The steel rail (2) is fixed above the floating plate (3) via a plurality of fastener units (1); The fastener unit (1) comprises a base, a bonding pad (11), a spring bar (12), a rail under-pad (14), an anchor bolt (16) and an insulating sleeve (18). The bottom end of the steel rail (2) is provided with a rail pad (14), the lower part of the rail pad (14) is provided with a bonding pad (11), the lower part of the bonding pad (11) is provided with a base, and the base is arranged above the floating plate (3). One end of the elastic bar (12) is buckled on the rail (2), and the other end of the elastic bar (12) is buckled on the bonding pad (11). An anchor bolt (16) is provided on the bonding pad (11), and a spring washer, an insulating sleeve (18) and a flat washer are penetrated through the anchor bolt (16).
4. The floating plate track structure based on particle damper according to claim 1, characterized in that: The floating plate (3) is symmetrically provided with a damper installation groove (6) in the middle or on both sides thereof, and the particle damper is fixed in the damper installation groove (6).
5. A floating plate track structure based on a particle damper according to claim 4, characterized in that: The particle damper and the damper mounting groove (6) are fixed together by bolt connection, riveting, pin connection or integral pouring.
6. A floating plate track structure based on a particle damper according to claim 4, characterized in that: The damper installation groove (6) includes a rectangular groove and a circular groove; The shape structure of the damper cavity (7) includes a single cavity, a multi-cavity or a honeycomb structure.
7. The floating plate track structure based on particle damper according to claim 1, characterized in that: A damping particle filling port (10) is provided on the surface of the damper cavity (7), and the damping particle filling port (10) is used to fill or replace damping particles (8). A lock buckle is provided at the damping particle filling port (10).
8. The floating plate track structure based on particle damper according to claim 1, characterized in that: The diameter of the damping particles (8) ranges from 1 to 50 mm; The damping particles (8) are in the shape of a sphere or a polyhedron.
9. A floating plate track structure based on a particle damper according to claim 8, characterized in that: The damping particles (8) are multi-graded damping particles formed with different diameters.