A rail damping dynamic vibration absorbing device

Abstract

The present invention provides a rail damping dynamic vibration absorbing device, comprising at least two support members, the support members are fixed on the rails; at least one connecting rod member arranged in a parallel direction relative to the rails, the connecting rod member connects the support member and the mass unit in a rigid direct connection or an elastic layer flexible indirect connection, forming a bridge and channel for excitation force transmission; at least one elastic layer, the elastic layer separates at least two of the connecting rod member, the support member, and the mass unit; wherein the elastic layer is arranged at the connection between the support member and the connecting rod member and / or at the connection between the connecting rod member and the mass unit, and the connecting rod member is at least partially embedded in the elastic layer. The rail damping dynamic vibration absorbing device described in the present invention not only achieves the purpose of eliminating safety hazards in railway operation from the source, but also reduces maintenance costs, reduces the interference of track maintenance construction on normal operations, and improves operational efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of vibration and noise control of rail transit, and in particular to a rail damping dynamic vibration absorbing device. Background Art

[0002] In recent years, my country's rail transit has developed rapidly, providing people with a fast and safe way of travel. At the same time, the vibration and noise problems it produces have seriously affected the quality of life of surrounding residents, endangered the safety of surrounding buildings, and affected the stability, safety and service life of the track itself.

[0003] How to reduce noise pollution during rail transportation, reduce vibration and wear of rails during transportation, thereby extending the life of the track and improving the safety and comfort of rail transportation has become a difficult problem closely related to the production and life of the people and has been increasingly concerned by governments and scientific and technological workers. During rail transportation, wheel-rail noise is the main source of sound when the train is traveling at a speed below 250km / h. Rail vibration is the main cause of noise, and the heavy weight, heavy load and high speed of the transport vehicle exacerbate the vibration of the track, so the wear and related problems of the track and wheels are also very serious. For example, the corrugated wear on the top surface of the rail, and the wear on the wheel edge and side of the wheel in the curved section of the wheel, all pose safety hazards to rail transportation, and frequent maintenance increases the cost of transportation.

[0004] At present, most rail damping vibration absorbers on the market are compression damping vibration absorbers, whose elastic units are mostly made of rubber materials, and the elastic units are in full contact with multiple rigid mass units to form a multi-subsystem vibration absorber. However, this type of vibration absorber has multiple rigid masses designed as one. During the design process, the resonance coupling effect of each subsystem must be considered, that is, each subsystem must have vibration mode coupling during use, and there is mutual interference of excitations, which makes the design very difficult. In addition, due to the large bearing area of ​​the elastic unit and the rail (the system stiffness is proportional to the product of the contact area and modulus), the rubber material is greatly affected by the bonding state, temperature and frequency. Any change in any parameter will cause a significant change in the design stiffness value. Therefore, in actual use, the design frequency and the target frequency deviate greatly, making it difficult to adjust flexibly. To this end, this project designed a rail damping vibration absorber with a multi-degree-of-freedom system, a low contact area and non-coupled subsystems. Summary of the invention

[0005] In view of the above technical problems, the present invention designs a rail vibration damping absorber with a multi-degree-of-freedom system, a low contact area and non-coupled subsystems.

[0006] In order to solve the above problems, the present invention discloses a rail damping dynamic vibration absorbing device, comprising

[0007] at least two support members, the support members being fixed on the rail;

[0008] At least one connecting rod arranged in a parallel direction relative to the rail, the connecting rod connects the support member and the mass unit in a rigid direct connection or an elastic layer flexible indirect connection to form a bridge and channel for transmitting the excitation force;

[0009] At least one elastic layer, the elastic layer separating at least two of the connecting rod, the support member, and the mass unit;

[0010] The elastic layer is arranged at the connection between the support member and the connecting rod member and / or at the connection between the connecting rod member and the mass unit. The connecting rod member is at least partially embedded in the elastic layer, so that the mass unit and the elastic layer constitute a mass-spring vibration subsystem. The vibration energy of the rail caused by the wheel-rail excitation force is transmitted to the subsystem constituted by the mass unit and the elastic layer. When the resonant frequency of the subsystem constituted by the mass unit and the elastic layer is adjusted to be close to the resonant frequency of the rail, the resonant vibration of the subsystem constituted by the mass unit and the elastic layer is caused and a reaction force with a force phase opposite to that of the main rail system is generated, thereby dissipating the vibration energy transmitted by the main rail system. At the same time, part of the vibration energy is converted into other forms of energy such as heat energy in the elastic layer through internal damping of the material and dissipated.

[0011] Preferably, the support member is arranged along the length direction of the rail in a manner perpendicular to the length direction of the rail, at least one side surface of the support member is in contact with the rail surface, and the support member is bonded or fixed to the rail by a fixing clamp.

[0012] Preferably, the elastic layer is arranged on the mass unit, a partial area of ​​the connecting rod is embedded in the elastic layer, the connecting rod is rigidly connected to the support member, and the connecting rod is flexibly connected to the mass unit.

[0013] Preferably, the elastic layer is arranged on the support member, two ends of the connecting rod are embedded in the elastic layer, the connecting rod is flexibly connected to the support member, and the connecting rod is rigidly connected to the mass unit.

[0014] Preferably, an elastic layer is provided at the connection between the connecting rod and the support member and at the connection between the connecting rod and the mass unit, and the connecting rod and the support member are flexibly connected, and the connecting rod and the mass unit are flexibly connected.

[0015] Preferably, the rail damping dynamic vibration absorbing device comprises two or more connecting rods, and the two or more connecting rods are separated by a rigid surface on the supporting member at the connection with the supporting member.

[0016] Preferably, at least two mass units are arranged between two adjacent support members, an elastic layer is provided at the connection between the connecting rod and each of the mass units, and a gap is provided between the two adjacent mass units.

[0017] Preferably, it also includes at least a third support member, the connecting rod member connects multiple support members in series, an elastic layer is arranged on at least one of the support members, the connecting rod member is flexibly connected to at least one of the support members, the mass unit is arranged between the two support members, the mass unit is not in contact with the support members, and the mass unit is rigidly or flexibly connected to the connecting rod member.

[0018] Preferably, the cross-section of the connecting rod and the elastic layer embedded in the support member is any one or more of circular, rectangular, polygonal and triangular.

[0019] Preferably, the rigid connection between the support member and the connecting rod member, or the connection between the support member and the elastic layer, and the connection between the elastic layer and the connecting rod member adopts any one or more of fully enclosed contact connection, semi-enclosed contact connection, point contact connection, line contact connection or surface contact connection.

[0020] Compared with the prior art, the rail damping dynamic vibration absorbing device described in the present invention can achieve good vibration reduction effect in a wide frequency band: in the low frequency band, by matching the frequency coordination relationship between the vibration absorber subsystem and the rail main system, the subsystem and the main system resonant frequency are consistent, and the reaction force generated by the resonance of the subsystem and the internal loss of the material are used to achieve the purpose of reducing the main vibration level of the rail. In the high frequency band, the resonance response peak of the main system is relatively large, and it is difficult for a single frequency modulation to have a significant effect. At this time, the rail damping dynamic vibration absorbing device described in the present invention mainly plays the role of a constrained damping layer, by suppressing the bending deformation movement of the steel beam, and using the viscous loss inside the elastic material to reduce the transmission of vibration energy. Since the rail damper can directly control and reduce the vibration of the rail surface, it also reduces the energy transmission of the wheel-rail excitation force along the path of the fastener, sleeper, and roadbed plate. Therefore, the rail damping dynamic vibration absorbing device described in the present invention not only achieves the purpose of eliminating the hidden dangers of railway operation safety from the source, but also reduces the maintenance cost, reduces the interference of track maintenance construction on normal operation, and improves operation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 The structural diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0023] Figure 3 for Figure 1 A schematic diagram of a second structure of the assembly of rails, support members and connecting rods shown in the AA section;

[0024] Figure 4 for Figure 1 A third structural diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0025] Figure 5 for Figure 1 A fourth structural schematic diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0026] Figure 6 for Figure 1 A fifth structural diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0027] Figure 7 for Figure 1 A sixth structural diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0028] Figure 8 for Figure 1 The seventh structural diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0029] Fig. 9 for Figure 1 The eighth structural schematic diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0030] Fig.10 for Figure 1 The ninth structural diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0031] Fig.11 for Figure 1 The tenth structural diagram of the assembly of rails, support members and connecting rods shown in the AA section;

[0032] Fig.12 for Figure 1 The structural schematic diagram of the assembly of the connecting rod and the elastic layer shown in the BB section;

[0033] Fig.13 for Figure 1 A schematic diagram of a second structure of the assembly of the connecting rod and the elastic layer shown in the BB section;

[0034] Fig.14 for Figure 1 A schematic diagram of a third structure of the assembly of the connecting rod and the elastic layer shown in the section BB in the middle;

[0035] Fig.15 It is a schematic diagram of arranging a plurality of mass units between two supporting members in the rail damping dynamic vibration absorbing device according to an embodiment of the present invention;

[0036] Fig.16 It is a structural schematic diagram of a plurality of subsystems connected in series through connecting rods in a rail damping dynamic vibration absorbing device according to an embodiment of the present invention;

[0037] Fig.17 This is a schematic diagram of the structure of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention being fixed by a clamp;

[0038] Fig.18 This is a schematic diagram of the structure of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention being fixed by a second type of clamp;

[0039] Fig.19 It is a schematic diagram of the structure of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention being fixed by a third type of clamp;

[0040] Fig. 20 It is a schematic structural diagram of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention being fixed by a fourth type of clamp;

[0041] Fig.21 for Fig. 20 A schematic structural diagram of the pressing plate described in;

[0042] Fig. 22 for Fig. 20 A schematic diagram of the structure of the connecting base plate;

[0043] Fig.23 It is a schematic structural diagram of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention being fixed by a fifth type of clamp;

[0044] Fig.24 for Fig.23 A schematic structural diagram of the pressing plate described in;

[0045] Fig.25 for Fig.23 A schematic diagram of the structure of the connecting base plate;

[0046] Fig.26 It is a schematic structural diagram of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention being fixed by a sixth type of clamp;

[0047] Fig. 27 It is a schematic structural diagram of the rail damping dynamic vibration absorbing device according to an embodiment of the present invention being fixed by a seventh type of clamp;

[0048] Fig.28 For the present invention Fig. 27 A schematic diagram of the structure of the fastener described in;

[0049] Description of reference numerals:

[0050] 1-rail, 101-upper wing, 102-rail waist, 103-lower wing, 2-support, 201-first support seat, 202-second support seat, 203-third support seat, 204-fourth support seat, 205-limiting groove, 3-mass unit, 301-first mass member, 302-second mass member, 4-connecting rod, 401-first connecting rod, 402-second connecting rod, 5-adhesive layer, 6-elastic layer, 601-first elastic unit, 602-second elastic unit, 603-third elastic unit, 604-fourth Elastic unit, 7-pressing plate, 701-crimping part, 702-lateral tightening part, 703-fixed connection part, 704-hinge connection part, 705-adjusting hole, 706-bending plate, 706a-horizontal part, 707-abutment part, 708-limiting plate, 8-connecting bottom plate, 801-bottom plate body, 802-first connecting hole, 803-second connecting hole, 804-hook part, 9-fastener, 901-first plug-in hole, 902-second plug-in hole, 10-wedge block, 11-connecting piece, 12-fastening nut, 13-gasket. DETAILED DESCRIPTION

[0051] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0052] Embodiment 1, as Figure 1 As shown, the present invention discloses a rail damping dynamic vibration absorbing device, comprising at least two support members, the support members being fixed on the rail;

[0053] At least one connecting rod arranged in a parallel direction relative to the rail, the connecting rod connects the support member and the mass unit in a rigid direct connection or an elastic layer flexible indirect connection to form a bridge and channel for transmitting the excitation force;

[0054] At least one elastic layer, the elastic layer separating at least two of the connecting rod, the support member, and the mass unit;

[0055] Wherein, the elastic layer 6 is arranged at the connection between the support member 2 and the connecting rod member 4 and / or at the connection between the connecting rod member 4 and the mass unit 3, and the connecting rod member 4 is at least partially embedded in the elastic layer, so that the mass unit 3 and the elastic layer 6 constitute a mass-spring vibration subsystem, and the vibration energy of the rail 1 caused by the wheel-rail excitation force is transmitted to the subsystem constituted by the mass unit 3 and the elastic layer 6. When the resonant frequency of the subsystem constituted by the mass unit 3 and the elastic layer 6 is adjusted to be close to the resonant frequency of the rail 1, the resonant vibration of the subsystem constituted by the mass unit 3 and the elastic layer 6 is caused, and a reaction force with a force phase opposite to that of the main system of the rail 1 is generated, so as to dissipate the vibration energy transmitted by the main system of the rail 1, and at the same time, part of the vibration energy is converted into other forms of energy such as heat energy in the elastic layer 6 through internal damping of the material and dissipated.

[0056] The rail damping dynamic vibration absorbing device described in the present invention can achieve good vibration reduction effect in a wide frequency band. The elastic layer is arranged at the connection between the support member and the connecting rod member and / or the connection between the connecting rod member and the mass unit. The connecting rod member is at least partially embedded in the elastic layer, so that the mass unit vibrates along the compression direction of the elastic layer. The vertical and lateral vibrations of the rail cause shear of the elastic layer. When the resonant frequency of the mass unit is adjusted to the resonant frequency of the rail, most of the vibration energy of the rail at the resonant frequency is transferred to the mass unit through the support member and / or the elastic layer, and dissipated in the elastic layer through elastic hysteresis.

[0057] In the low frequency band, by matching the frequency coordination relationship between the vibration absorber subsystem and the rail main system, the subsystem and the main system resonant frequency are consistent, and the reaction force generated by the subsystem resonance and the internal loss of the material are used to achieve the purpose of reducing the main vibration level of the rail. In the high frequency band, the resonance response peak of the main system is relatively large, and it is difficult for a single frequency modulation to have a significant effect. At this time, the rail damping dynamic vibration absorption device described in the present invention mainly plays the role of a constrained damping layer, by suppressing the bending deformation movement of the steel beam, and using the viscous loss inside the elastic material to reduce the transmission of vibration energy. Since the rail damper can directly control and reduce the vibration of the rail surface, it also reduces the energy transmission of the wheel-rail excitation force along the path of fasteners, sleepers, and roadbed plates. Therefore, this vibration reduction measure not only achieves the purpose of eliminating the hidden dangers of railway operation safety from the source, but also reduces the maintenance cost, reduces the interference of track maintenance construction on normal operation, and improves operational efficiency.

[0058] Based on the technical principle of the present invention, in the embodiment of the present invention, the rigid connection is a direct connection, and the flexible connection is a connection through the elastic layer 6. The elastic layer in the present invention can be made of rubber products, or other elastic materials other than rubber, for example, elastic materials such as elastic polyurethane can also be used; in addition, the specific shapes and materials of the mass unit and the support member in the present invention can be various, and they can be various shapes such as cylinders, cuboids, spheres and irregular shapes, and can also be made of metal materials such as steel or non-metal materials such as stone and heavy concrete. The shape and quantity of the mass unit can be selected and designed according to the needs of the project.

[0059] Preferably, as a preferred embodiment of the present invention, the support member is arranged along the length direction of the rail in a manner perpendicular to the length direction of the rail, at least one side of the support member is in contact with the rail surface, and the support member is bonded or fixed to the rail by a fixing clamp.

[0060] As an example of the present invention, the rail damping dynamic vibration absorbing device is arranged between two adjacent fasteners on the rail 1, the rail includes a rail body, the rail body has a rail waist 102, the rail body has a lower side wing 103 at a position close to the rail bottom, the rail body has an upper side wing 101 at a position away from the rail bottom, one side of the support member 2 is in contact and fixed with the rail waist 102, and the other side of the support member is in contact and fixed with the lower side wing 101. This arrangement discloses a setting and fixing method of the support member 2, by arranging the support member 2 in a manner along the length direction of the rail and perpendicular to the length direction of the rail, on the one hand, it is convenient to install and fix the support member 2, and it can quickly realize that the elastic layer 6 installed on the support member 2 is also arranged in a direction perpendicular to the length of the rail; the support member 2 is fixed to the rail through two contact surfaces, which improves the stability of the fixed connection of the support member 2 and avoids the vibration of the rail affecting the vibration reduction effect of the rail damping dynamic vibration absorbing device of the present invention.

[0061] Preferably, as a preferred embodiment of the present invention, Figures 2-3 As shown, the elastic layer is arranged on the mass unit, a partial area of ​​the connecting rod is embedded in the elastic layer, the connecting rod is rigidly connected to the support member, and the connecting rod is flexibly connected to the mass unit.

[0062] As an example of the present invention, the support member 2 and the rail 1 are bonded as a whole through an adhesive layer 5, the connecting rod 4 is connected as a whole with at least one of the support members 2, and the mass unit 3 serves as a separate mass action member. A plurality of mass units 3 can be arranged between the two adjacent support members 2, and at least one of the plurality of mass units 3 is connected to the connecting rod 4 through an elastic layer 6. Alternatively, the two ends of the connecting rod 4 are rigidly connected to the two support members 2, respectively, and each mass unit 3 is connected to the connecting rod 4 through an elastic layer 6. The plurality of mass units 3 are independent of each other and do not contact each other, forming a small dynamic vibration absorber. The connecting rod 4 connects a series of small dynamic vibration absorbers in series. The shapes and masses of the plurality of mass units 3 can be the same or different. The dynamic vibration absorbers are also independent of each other, and the reaction force is only transmitted to the support member 2 and then to the rail 1 through the connecting rod 4, thereby reducing the vibration of the rail. In this scheme, the connecting rod 4 and the mass unit 3 are separated, and the connecting rod 4 only plays the role of transmitting force and is no longer regarded as a rigid mass. The rigid connection between the connecting rod 4 and the support member 2 can be as follows Figure 2 , Figure 3 Any one or two of the rigid connections shown in ; the flexible connection between the connecting rod 4 and the mass unit 3 can be as follows Fig.12 , Fig.13 Any one or both of the flexible connections shown in .

[0063] Preferably, Figures 4 to 8 As shown in the figure, as a preferred embodiment of the present invention, the elastic layer is arranged on the support member, the two ends of the connecting rod are embedded in the elastic layer, the connecting rod is flexibly connected to the support member, and the connecting rod is rigidly connected to the mass unit. In this example, the connecting rod and the mass unit are regarded as a mass whole, and the support member, the mass unit and the elastic layer form a single degree of freedom vibration system.

[0064] As an example of the present invention, the support member 2 and the rail 1 are bonded as a whole through an adhesive layer 5, an elastic layer 6 is provided on at least one of the two support members 2 at both ends of the connecting rod 4, at least a part of the connecting rod 4 is embedded in the elastic layer 6, the connecting rod 4 is rigidly connected to the mass unit 3, the connecting rod 4 and the mass unit 3 are regarded as a mass whole, the mass unit 3 drives the vibration of the connecting rod 4 to transfer the reaction force through the elastic layer 6 to the support member 2 and then to the rail 1, thereby reducing the vibration of the rail, and the flexible connection between the connecting rod 4 and the support member 2 can be as follows Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown in any one or more of the above or other flexible connection methods through the elastic layer 6, the connecting rod 4 is rigidly connected to the mass unit 3 as shown in Fig.14 shown.

[0065] Alternatively, as a preferred embodiment of the present invention, an elastic layer is provided at the connection between the connecting rod and the support and at the connection between the connecting rod and the mass unit, and the connecting rod is flexibly connected to the support and the connecting rod is flexibly connected to the mass unit. In this example, the connecting rod 4 and the mass unit 3 are regarded as two independent mass members, and a dual-mass dual-degree-of-freedom vibration system is formed between the support, the mass unit and the elastic layer; multiple connecting rods and / or mass units can also be provided, and multiple support members, multiple mass units and multiple elastic layers form a multi-mass multi-degree-of-freedom vibration system under the series action of the through-length connecting rod. As an example of the present invention, the support member 2 is fixed to the rail 1 by an adhesive layer 5 or a fixing clamp, the two ends of the connecting rod 4 are flexibly connected to the two support members 2 by an elastic layer 6, and the connecting rod 4 is flexibly connected to at least one mass unit 3 by an elastic layer 6. This arrangement facilitates the formation of multiple response peaks, so that multiple resonant frequencies in the subsystem can be consistent with multiple resonant frequencies in the main system, and multiple frequencies with large vibration energy contributions can be controlled simultaneously, thereby achieving the purpose of reducing the main vibration level of the rail.

[0066] Preferably, the rail damping dynamic vibration absorbing device comprises two or more connecting rods 4, and the two or more connecting rods 4 are separated by a rigid surface on the support member at the connection with the support member 2. The connection between the two or more connecting rods 4 and the support member 2 can be rigidly connected, or flexibly connected through the elastic layer 6, or part of the connecting rods 4 can be rigidly connected to the support member 2, and the other part of the connecting rods 4 can be flexibly connected to the support member 2. Figure 5 As shown, two connecting rods 4 are provided, namely a first connecting rod 401 and a second connecting rod 402. The first connecting rod 401 is flexibly connected to the support member 2 through a third elastic unit 603, and the second connecting rod 402 is flexibly connected to the support member 2 through a fourth elastic unit 604. Two or more connecting rods 4 and the driven mass units act independently in the rail damping dynamic vibration absorbing device without coupling with each other. The mass units 3 connected in series on two or more connecting rods 4 can be the same or different from each other. For example, mass units and connecting rods of different materials, different stiffnesses, and different sizes can be selected. The connection between two or more connecting rods 4 and the mass units 3 can be a rigid connection, such as Fig.14 As shown; it can also be a flexible connection, such as Fig.12 or Fig.13wherein two or more connecting rods 4 can also be simultaneously connected to the same mass unit 3, such as Fig.13 As shown, the first connecting rod 401 and the second connecting rod 402 are flexibly connected to the same mass unit 3 through the first elastic unit 601 and the second elastic unit 602 respectively, and the first elastic unit 601 and the second elastic unit 602 are separated by the rigid surface of the mass unit 3.

[0067] This arrangement can better achieve the vibration absorption effect of the rail damping dynamic vibration absorption device of the present invention on rail vibration. On the other hand, it also increases the selection range of damping materials, which is conducive to reducing product costs.

[0068] Preferably, the cross-sections of the connecting rod 4 and the elastic layer 6 embedded in the support member 2 are any one or more of circular, rectangular, polygonal, and triangular. The rigid connection between the support member 2 and the connecting rod 4, or the connection between the support member 2 and the elastic layer 6, and the connection between the elastic layer 6 and the connecting rod 4 adopt any one or more of fully enclosed contact connection, semi-enclosed contact connection, point contact connection, line contact connection, or surface contact connection. When a non-fully enclosed contact connection such as semi-enclosed contact connection, point contact connection, line contact connection, or surface contact connection is adopted, the two can be fixedly connected by bonding or a third connecting member (such as a bolt). As an example of the present invention, the rigid connection between the support member 2 and the connecting rod 4 can be adopted as follows: Figure 2 The fully enclosed contact connection shown can also be made as Figure 3 The connection between the support member 2 and the elastic layer 6 can be made as follows Figure 4 , Figure 5 The fully enclosed connection shown can also be used as Figure 6 The semi-enclosed connection shown can also be used as Figure 7 The elastic layer 6 and the connecting rod 4 can be connected by the surface contact connection shown in FIG. Figure 4 , Figure 5 The fully enclosed connection shown can also be used as Figure 6 The semi-enclosed connection shown can also be used as Figure 7 The surface contact connection shown can also be made as Figure 8 The concave-convex structure shown in the figure is connected with the connected structure.

[0069] Preferably, as a preferred embodiment of the present invention, the connection between the elastic layer 6 and the connecting rod 4 is semi-enclosed, an opening is provided on the elastic layer 6, and the connecting rod 4 is provided in the opening on the elastic layer 6. Fig. 9In the connection structure shown, the elastic layer 6 is arranged in a C-shape or a groove shape, and the connecting rod 4 is arranged in an opening arranged on the elastic layer 6. This arrangement improves the convenience of assembling the connecting rod 4 and the elastic layer 6, while also ensuring the vibration reduction effect of the rail damping dynamic vibration absorbing device of the present invention.

[0070] Alternatively, as a preferred embodiment of the present invention, the connection between the elastic layer 6 and the connecting rod 4 is a fully enclosed connection, and a connecting groove is provided in the elastic layer 6, and the connecting groove is generally arranged in a special shape or a letter shape, or a text shape, such as Fig.10 , Fig.11 The connection rod 4 is configured to be able to extend into the connection groove. This configuration enables the mass unit 3 and the elastic layer 6 to constitute a mass spring vibration subsystem, which is reliable in dissipating the vibration energy transmitted by the main system of the rail 1.

[0071] Preferably, as a preferred embodiment of the present invention, at least two mass units are arranged between the two adjacent support members, an elastic layer is arranged at the connection between the connecting rod and each of the mass units, and a gap is arranged between the two adjacent mass units. Fig.15 As shown, three mass units 3 are connected in series between the two support members 2, and each mass unit 3 is flexibly connected to the connecting rod 4 through an elastic layer 6; different mass units 3 and the elastic layer 6 constitute a damping dynamic vibration absorbing subsystem for controlling vibrations of different frequencies, which can simultaneously control multiple frequencies with large vibration energy contributions, and achieve better vibration reduction and energy consumption effects. Of course, based on the technical principles of this example, four, five or even more mass units can also be set, which are all simple changes based on the technical principles of the present invention and are within the protection scope required by the present invention.

[0072] Preferably, as a preferred embodiment of the present invention, it also includes at least a third support member, the connecting rod member connects multiple support members in series, an elastic layer is arranged on at least one of the support members, the connecting rod member is flexibly connected to at least one of the support members, the mass unit is arranged between the two support members, and the mass unit is rigidly or flexibly connected to the connecting rod member. As an example of the present invention, the mass unit 3 can be arranged between every two adjacent support members 2, and the number of mass units 3 arranged on both sides of each support member 2 can be the same or different, refer to Figure 1 As shown, it includes three support members 2, a mass unit 3 is arranged between every two adjacent support members 2, two mass units are arranged on one side of the middle support member 2, and one mass unit is arranged on the other side of the middle support member 2; it is also possible to arrange one or more mass units 3 between every two support members 2 to form a vibration absorbing unit, such as Fig.16As shown, it includes a first support seat 201, a second support seat 202, a third support seat 203, and a fourth support seat 204. The first support seat 201, the second support seat 202, the third support seat 203, and the fourth support seat 204 are fixed on the rail 1, and a first mass member 301 is arranged between the first support seat 201 and the second support seat 202. The first support seat 201, the first mass member 301, and the second support seat 202 form a first vibration absorbing unit. A second mass member 302 is arranged between the third support seat 203 and the fourth support seat 204. The third support seat 203, the second mass member 302, and the fourth support seat 204 form a second vibration absorbing unit. The connecting rod 4 can sequentially connect the first support seat 201, the first mass member 301, the second support seat 202, the third support seat 203, the second mass member 302, and the fourth support seat 204 in series.

[0073] As an embodiment of the present invention, the connection method between the connecting rod 4 and the support member 2 and the mass unit 3 can adopt any connection between the connecting rod 4 and the support member 2, and the combination of the connecting rod 4 and the mass unit 3 in this embodiment. Through different connection combinations of the connecting rod 4, the support member 2, and the mass unit 3, a wider range of vibration frequencies can be controlled. For example, by setting a mass unit with smaller stiffness, it can be suitable for controlling vibrations of lower frequencies. By setting a mass unit with larger stiffness, it can be suitable for controlling vibrations of higher frequencies. It is more practical. The matching connection methods that can be implemented by technical personnel in this field are all within the protection scope of the present invention.

[0074] Embodiment 2, the present invention further discloses a rail damper fixing fixture, which is used to fix the rail damping dynamic vibration absorbing device on the rail 1, and the fixing fixture includes a connecting base plate 8, a pressure plate 7 and a fastener 9. The connecting base plate 8 is arranged below the rail 1, and one end of the pressure plate 7 is in contact with the support member 2 to form a first fulcrum. The connecting base plate 8 and the pressure plate 7 are vertically connected by the fastener 9 to form a second fulcrum. The other end of the pressure plate 7 is in contact with the connecting base plate 8 to form a third fulcrum. The second fulcrum is located between the first fulcrum and the third fulcrum. The fastener 9 forms an extrusion force on the second fulcrum through its own tensioning force, so that the first fulcrum and the third fulcrum generate a reverse bending moment and a reaction force, thereby realizing vertical or lateral tightening pressure on the support member 2.

[0075] Preferably, the distance from the second fulcrum to the first fulcrum is not greater than the distance from the second fulcrum to the third fulcrum.

[0076] The fixing clamp described in the present invention adopts the lever principle, and sets at least one constraint fulcrum, namely the second fulcrum, and two movable fulcrums, namely the first fulcrum and the third fulcrum. The pressure plate 7 is in contact with and constrained by the support member 2 and fixes the support member 2 on the rail 1. The connecting bottom plate 8 is connected to the pressure plate 7 by fasteners 9, and a preload is applied to the constraint fulcrum by the fasteners 9. According to the action force and the reaction force, the two movable fulcrums will inevitably generate a reaction force, and since the force arms of the movable fulcrums from the constraint fulcrums are different, the reaction forces generated are also different. The distance from the constraint fulcrum to the first fulcrum is not greater than the distance from the constraint fulcrum to the second fulcrum. Most of the preload applied to the constraint fulcrum is transmitted to the first fulcrum, that is, to the side where the pressure plate 7 contacts the support member 2, thereby achieving the purpose of fastening the support member 2 with the pressure plate 7.

[0077] The rail damper fixing fixture described in the present invention has a simple structure and a stable connection. By setting different distances from the constraint fulcrum to the two movable fulcrums, most of the applied preload force is transmitted to the contact side of the pressure plate and the support member, so that the support member can be more closely attached to the rail surface, thereby improving the vibration transmission efficiency. In addition, the rail damper fixing fixture described in the present invention can be applied to rail damping dynamic vibration absorbing devices of different shapes and sizes, so as to be suitable for installation on different rail models and track structures, and has a wide range of applications.

[0078] As an example of the present invention, the inner side of the support member 2 is the side close to the rail waist 102, and the outer side of the support member 2 is the side away from the rail waist 102; similarly, the inner side of the pressure plate 7 is the side close to the rail waist 102, and the outer side of the pressure plate 7 is the side away from the rail waist 102.

[0079] Preferably, as a preferred embodiment of the present invention, the inner side surface of the support member 2 contacts the rail waist 102 of the rail 1, the bottom surface of the support member 2 contacts the lower side wing 103 of the rail 1, and the pressure plate 7 contacts and constrains at least one of the top surface or the outer side surface of the support member 2.

[0080] As an example of the present invention, Fig.17 As shown, the pressing plate 7 includes a crimping portion 701, which is formed at the end of the pressing plate 7 close to the rail 1, and the crimping portion 701 is crimped on the top surface of the support member 2. This arrangement forms a downward pre-tightening force on the pressing plate 7 due to the upper and lower fastening of the connecting bottom plate 8 and the pressing plate 7 by the fastener 9. The inner side section of the pressing plate 7 directly contacts the rail damping device and forms a downward pre-tightening force on it, thereby achieving the purpose of fixing and stabilizing.

[0081] As an example of the present invention, when the pressing plate 7 is in contact with the outer side surface of the support member 2, the contact position of the pressing plate 7 with the outer side of the support member 2 is any one or more of the upper position, the middle position, and the lower position of the side surface of the support member 2. The pressing plate 7 can be in contact with the outer side of the support member 2 by the abutment portion 707 at the end of the pressing plate 7 abutting against the outer surface of the support member 2, or the abutment portion 707 of the pressing plate 7 can extend into the limiting groove 205 provided on the outer side of the support member 2, such as Fig.18 and Fig.19 As shown, a limiting groove 205 is provided on the outer side of the support member 2, and the abutting portion 707 can extend into the limiting groove 205 to limit the support member 2 during the fastening process of the fastener 9. Preferably, a limiting plate 708 is provided on the pressing plate 7, and the limiting plate 708 can be tightly connected with the outer side surface of the support member 2 during the fastening process of the fastener 9, and the limiting plate 708 is provided between the fastener 9 and the support member 2. This arrangement further improves the reliability and stability of the fastening connection between the pressing plate 7 and the support member 2, avoids the shaking of the rail damping dynamic vibration absorbing device during the vibration reduction process, and ensures the vibration reduction and noise reduction effect of the vibration absorbing device.

[0082] Preferably, as a preferred embodiment of the present invention, the pressing plate 7 includes a crimping portion 701, a lateral tightening portion 702 and a fixed connection portion 703, one end of the fixed connection portion 703 is connected to the lateral tightening portion 702, and the other end is connected to the connecting bottom plate 8, the crimping portion 701 is crimped on the top surface of the support member 2, the lateral tightening portion 702 is tightly attached to the outer surface of the support member 2, and the upper end of the fastener 9 is fastened to the fixed connection portion 703. As an example of the present invention, Figures 20-22 As shown, the fastener 9 and the fixed connection part 703 are fastened by a fastening nut 12, which is convenient for installation and fastening adjustment on the one hand, and reduces the production cost on the other hand. The pressure plate 7 is limited and fixed to the top surface and the outer side surface of the support member 2 at the same time, which further improves the stability of the pressure plate limiting the support member under the fastening action of the fastener.

[0083] Furthermore, the fixed connection part 703 is arranged in a bent shape, and a wedge block 10 is arranged at the bent connection between the fastener 9 and the fixed connection part 703. This arrangement makes the contact surface between the fastener 9 and the fixed connection part 703 a horizontal surface, further improving the adjustment and tightening effect of the fastener 9 on the pressure plate 7, and preventing the connection from loosening or sliding. As an example of the present invention, Figures 17 to 19As shown, the pressure plate 7 includes a bending plate 706, and the upper surface of the bending plate 706 is at least partially horizontally arranged to form a horizontal portion 706a. The fastener 9 passes through the horizontal portion 706a of the bending plate 706 and is fixed by the fastening nut 12; if the fastener 9 passes through the bending portion of the fixed connection portion 703 or the bending portion of the bending plate 706, a wedge block 10 is arranged on the upper surface of the pressure plate 7, and the connecting surface between the wedge block 10 and the fastener 9 is arranged horizontally. Preferably, a gasket 13 is arranged at the connection between the fastening nut 12 and the horizontal portion 706a or the wedge block 10 to further improve the fastness of the bolt connection.

[0084] Or, if Figures 27-28 As shown, the fastener 9 is provided with a first plug hole 901 and a second plug hole 902, the first plug hole 901 and the second plug hole 902 are arranged in an up-and-down shape, the fastener 9 is sleeved on the connecting bottom plate 8 through the first plug hole 901, and the fastener 9 is sleeved on the pressing plate 7 through the second plug hole 902, and the wedge block 10 can extend into the second plug hole 902 to fix the pressing plate 7. This arrangement eliminates bolt fasteners, and the pressing plate 7 is pressed and fixed by hammering the wedge block 10, which reduces the number of parts and improves assembly efficiency.

[0085] As an example of the present invention, the connecting bottom plate 8 includes a bottom plate body 801, a first connecting hole 802 is provided on the bottom plate body 801, and correspondingly, an adjusting hole 705 is provided on the fixed connecting portion 703, and the fastener 9 can be fixed after passing through the first connecting hole 802 and the adjusting hole 705 in sequence. As an example of the present invention, the first connecting hole 802 and / or the adjusting hole 705 are provided in the form of an oblong hole or an oblong slot hole, which is convenient for adjusting the relative position of the fastener 9 and the pressing plate 7, which is convenient for installation on the one hand, and improves the applicability of the present invention on the other hand.

[0086] As a preferred embodiment of the present invention, Fig.26 As shown, a hooking portion 803 is provided on the connecting bottom plate 8, and the hooking portion 803 is hooked on the upper surface of the lower wing 103. This arrangement facilitates the positioning of the connecting bottom plate 8 and the rail 1 when they are assembled, and at the same time prevents the connecting bottom plate 8 from being displaced under the vibration of the rail 1, thereby ensuring the reliability of the rail damping dynamic vibration absorbing device provided on the rail when in use.

[0087] Preferably, as a preferred embodiment of the present invention, the end of the pressing plate 7 away from the supporting member 2 is integrally formed with the connecting bottom plate 8 or is hingedly fixed. Figures 17 to 19As shown, the end of the pressing plate 7 away from the support member 2 is integrally formed with the connecting bottom plate 8, and this arrangement improves the convenience of fixing the support member 2 through the pressing plate 7 of the rail damper fixing fixture of the present invention; further, the end of the pressing plate 7 away from the support member 2 is hingedly fixed to the connecting bottom plate 8, and this arrangement improves the applicability of fixing the support member 2 through the pressing plate 7 of the rail damper fixing fixture of the present invention. Preferably, as Figures 23 to 25 As shown, a hinged connection part 704 is formed at one end of the pressing plate 7 away from the supporting member 2, and the hinged connection part 704 is arranged horizontally. Correspondingly, a second connection hole 803 is arranged on the connecting bottom plate 8, and the connecting member 11 can pass through the second connection hole 803 to support and fix the hinged connection part 704. As an example of the present invention, the first connection hole 802 and the second connection hole 803 are arranged on the connecting bottom plate 8 along the center line of the rail 1, respectively. This arrangement enables the same connecting bottom plate 8 to fix the two pressing plates 7 to the two supporting members 2 respectively, reducing the arrangement of parts, saving costs, facilitating assembly, and ensuring stable connection.

[0088] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A rail damping dynamic vibration absorbing device, characterized in that: Include at least two support members, the support members being fixed on the rail; At least one connecting rod arranged in a parallel direction relative to the rail, the connecting rod connects the support member and the mass unit in a rigid direct connection or an elastic layer flexible indirect connection to form a bridge and channel for transmitting the excitation force; At least one elastic layer, the elastic layer separating at least two of the connecting rod, the support member, and the mass unit; The elastic layer (6) is arranged at the connection between the support member (2) and the connecting rod member (4) and / or at the connection between the connecting rod member (4) and the mass unit (3); the connecting rod member (4) is at least partially embedded in the elastic layer, so that the mass unit (3) and the elastic layer (6) constitute a mass-spring vibration subsystem, so that the mass unit vibrates along the compression direction of the elastic layer, the vertical and lateral vibrations of the rail cause shearing of the elastic layer, and the vibration energy of the rail (1) caused by the wheel-rail excitation force is transmitted to the subsystem constituted by the mass unit (3) and the elastic layer (6). When the resonant frequency of the subsystem is adjusted to be close to the resonant frequency of the rail (1), the subsystem constituted by the mass unit (3) and the elastic layer (6) causes resonant vibration and generates a reaction force with a force phase opposite to that of the main system of the rail (1), thereby dissipating the vibration energy transmitted by the main system of the rail (1), and at the same time, part of the vibration energy is converted into other forms of energy, such as heat energy, in the elastic layer (6) through internal damping of the material and dissipated; In the low frequency band, the frequency coordination relationship between the vibration absorber subsystem and the rail main system is matched to make the subsystem and the main system resonant frequency coincide, and the reaction force generated by the resonance of the subsystem and the internal loss of the material are utilized; in the high frequency band, the rail damping dynamic vibration absorbing device plays the role of a constrained damping layer, suppresses the bending deformation movement of the steel beam, and reduces the transmission of vibration energy by utilizing the viscous loss inside the elastic material; The support member is arranged along the length direction of the rail in a manner perpendicular to the length direction of the rail, at least one side surface of the support member is in contact with the rail surface, and the support member is bonded or fixed to the rail by a fixing clamp.

2. The rail damping dynamic vibration absorbing device according to claim 1, characterized in that: The elastic layer is arranged on the mass unit, a partial area of ​​the connecting rod is embedded in the elastic layer, the connecting rod is rigidly connected to the supporting member, and the connecting rod is flexibly connected to the mass unit.

3. The rail damping dynamic vibration absorbing device according to claim 1, characterized in that: The elastic layer is arranged on the support member, two ends of the connecting rod are embedded in the elastic layer, the connecting rod is flexibly connected to the support member, and the connecting rod is rigidly connected to the mass unit.

4. The rail damping dynamic vibration absorbing device according to claim 1, characterized in that: An elastic layer is provided at the connection between the connecting rod and the supporting member and at the connection between the connecting rod and the mass unit. The connecting rod is flexibly connected to the supporting member and the connecting rod is flexibly connected to the mass unit.

5. The rail damping dynamic vibration absorbing device according to any one of claims 1 to 4, characterized in that: The rail damping dynamic vibration absorbing device comprises two or more connecting rods (4), and the two or more connecting rods (4) are separated by a rigid surface on the supporting member at the connection with the supporting member (2).

6. The rail damping dynamic vibration absorbing device according to claim 1, characterized in that: At least two mass units are arranged between two adjacent support members, an elastic layer is arranged at the connection between the connecting rod and each of the mass units, and a gap is arranged between the two adjacent mass units.

7. The rail damping dynamic vibration absorbing device according to claim 1 or 6, characterized in that: It also includes at least a third support member, the connecting rod member connects multiple support members in series, an elastic layer is arranged on at least one of the support members, the connecting rod member is flexibly connected to at least one of the support members, the mass unit is arranged between the two support members, the mass unit is not in contact with the support members, and the mass unit is rigidly or flexibly connected to the connecting rod member.

8. The rail damping dynamic vibration absorbing device according to claim 1, characterized in that: The cross-sections of the connecting rod (4) and the elastic layer (6) embedded in the support member (2) are any one or more of circular, rectangular, polygonal and triangular.

9. The rail damping dynamic vibration absorbing device according to claim 1, characterized in that: The rigid connection between the support member (2) and the connecting rod member (4), or the connection between the support member (2) and the elastic layer (6), or the connection between the elastic layer (6) and the connecting rod member (4) adopts any one or more of fully enclosed contact connection, semi-enclosed contact connection, point contact connection, line contact connection or surface contact connection.

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