Composite damper for reducing vibration noise of steel rail

Abstract

The composite damper comprises a main body unit and a noise reduction unit, the main body unit comprises a steel rail body, a base plate is arranged at the bottom of the steel rail body, mounting frames are fixed to the four corners of the top of the base plate, and connecting ribs are arranged on the mounting frames. A pressing plate is jointly fixed to one ends of the two correspondingly-arranged connecting ribs, each noise reduction unit comprises two elastic hollow damping layers, the two elastic hollow damping layers are arranged on the two sides of the steel rail body respectively, the elastic hollow damping layers are filled with damping liquid, and a plurality of cylinders are fixed and communicated with the interiors of the elastic hollow damping layers. When the elastic hollow damping layer is extruded, the damping liquid is extruded, the damping liquid flows into the cylinder body after being extruded, so that the damping liquid impacts the piston, the piston moves in the cylinder body and compresses the spring, the spring can absorb a part of resonance energy again, and the noise reduction effect is achieved again. Therefore, the noise reduction effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to damper technical field especially relates to a compound damper for reducing rail vibration noise. BACKGROUND

[0002] Railway and urban rail transit system develops rapidly, it has the advantage of energy saving and environmental protection, but there is the problem of environmental pollution of high noise. When the rail vehicle, including high speed train, subway and other urban rail vehicles, is running, the vehicle and the track interact continuously, which will produce continuous vibration and noise, not only deteriorate the comfort of passengers in the car, but also make the residents along the line suffer from vibration and noise. Wheel-rail noise is one of the main noise sources of rail transit, and the vibration and sound radiation of the rail are important reasons for wheel-rail noise, so reducing the vibration of the rail structure and controlling the wheel-rail noise are the key problems to be solved at present.

[0003] Publication No. CN 215758278 U discloses a rail noise reduction damper, the utility model can fully produce resonance deformation, improve the noise reduction effect, set up different layout area when counting multiple cantilever pieces, can effectively suppress the vibration of the middle and low frequency specific frequency which contributes greatly to the vibration energy of the rail, significantly reduce the vibration and noise level of the rail at the relevant frequency.

[0004] The above-mentioned prior art only sets multiple damping layers to improve the noise reduction effect, but the structures of the multiple damping layers are similar, the noise reduction principles of the damping layers with the same structure are the same, which are all through resonance deformation of the damping layer itself to reduce noise, and the single noise reduction mode leads to unsatisfactory noise reduction effect. UTILITY MODEL CONTENTS

[0005] (I) Utility model purpose

[0006] Therefore, the utility model aims at providing a compound damper for reducing rail vibration noise, and the technical problem to be solved is that the structures of the multiple damping layers are similar, the noise reduction principles of the damping layers with the same structure are the same, which are all through resonance deformation of the damping layer itself to reduce noise, and the single noise reduction mode leads to unsatisfactory noise reduction effect.

[0007] (II) Technical scheme

[0008] In order to achieve the above technical purpose, the utility model provides a compound damper for reducing rail vibration noise:

[0009] It includes a main body unit and a noise reduction unit, the main body unit includes a rail body, the rail body bottom is provided with a base plate, the base plate top four corners are fixedly connected with mounting frames, the mounting frames are provided with connecting ribs, two corresponding connecting ribs one end are fixedly connected with a pressing plate, the noise reduction unit includes two elastic hollow damping layers, two elastic hollow damping layers are arranged on both sides of the rail body respectively, the elastic hollow damping layer is filled with damping liquid, a plurality of cylinder bodies are fixedly connected and communicated in the elastic hollow damping layer, a plurality of through grooves are formed in the pressing plate, the cylinder body can penetrate through the corresponding through groove.

[0010] As a preferred scheme of the composite damper for reducing the vibration noise of the rail, the piston is sealingly and slidably connected in the cylinder body, and a plurality of air holes are formed in one end of the cylinder body.

[0011] As a preferred scheme of the composite damper for reducing the vibration noise of the rail, the spring is arranged in the cylinder body, one end of the spring is fixedly connected with the piston, and the other end of the spring is fixedly connected with the inner wall of the cylinder body.

[0012] As a preferred scheme of the composite damper for reducing the vibration noise of the rail, a threaded hole is formed in the top of the mounting frame, a circular hole is formed in the connecting rib, a bolt penetrates through the circular hole, and the bolt is threadedly connected with the threaded hole.

[0013] As a preferred scheme of the composite damper for reducing the vibration noise of the rail, a recess is formed in the top of the base plate, an elastic damping layer is placed in the recess, and the elastic damping layer is attached to the bottom of the rail body.

[0014] As a preferred scheme of the composite damper for reducing the vibration noise of the rail, in the normal state, the piston is located in the cylinder body.

[0015] From the above technical scheme, the present application has the following beneficial effects:

[0016] 1: When the rail body vibrates, the elastic hollow damping layer is extruded, the elastic hollow damping layer can be deformed with resonance, and the noise reduction effect is achieved. In addition, the elastic hollow damping layer is filled with damping liquid, the damping liquid can absorb the energy of the elastic hollow damping layer during resonance, thereby reducing the amplitude of the elastic hollow damping layer resonance, and further achieving the noise reduction effect.

[0017] 2: when the elastic hollow damping layer is extruded, the damping liquid is extruded, and the damping liquid is extruded to the cylinder, so that the damping liquid impacts the piston, the piston moves in the cylinder and compresses the spring, and the spring can absorb part of the resonance energy, and the noise reduction effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description only show the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of the provided drawings.

[0019] Figure 1 The structure schematic diagram of the composite damper for reducing the vibration noise of the steel rail provided by the present application is shown in the figure.

[0020] Figure 2 The sectional structure schematic diagram of the composite damper for reducing the vibration noise of the steel rail provided by the present application is shown in the figure.

[0021] Figure 3 The internal structure schematic diagram of the cylinder provided by the present application is shown in the figure.

[0022] Figure 4 The split structure schematic diagram of the composite damper for reducing the vibration noise of the steel rail provided by the present application is shown in the figure.

[0023] BRIEF DESCRIPTION OF DRAWINGS: 100, main unit; 101, steel rail body; 102, base plate; 103, mounting frame; 104, connecting rib; 105, pressing plate; 106, through slot; 107, round hole; 108, threaded hole; 109, bolt; 200, noise reduction unit; 201, elastic hollow damping layer; 202, damping liquid; 203, cylinder; 204, piston; 205, air hole; 206, spring; 207, groove; 208, elastic damping layer. DETAILED DESCRIPTION

[0024] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application and uses. It should be understood that throughout the drawings, the same or similar reference numerals can indicate the same or similar parts or features. The various drawings only schematically represent the concepts and principles of the embodiments of the present disclosure, and do not necessarily show the specific dimensions and their proportions of the various embodiments of the present disclosure. The specific parts in the specific drawings can be exaggerated to illustrate the relevant details or structures of the embodiments of the present disclosure.

[0025] REFERENCE Figures 1-4:

[0026] For an embodiment of the utility model, provide a kind of composite damper for reducing rail vibration noise, including main unit 100 and noise reduction unit 200, main unit 100 includes rail body 101, rail body 101 bottom is provided with backing plate 102, backing plate 102 top four corners are all fixed with mounting bracket 103, mounting bracket 103 is provided with connecting rib 104, two corresponding connecting ribs 104 one end is commonly fixed with pressing plate 105, noise reduction unit 200 includes two elastic hollow damping layers 201, two elastic hollow damping layers 201 are respectively arranged in the both sides of rail body 101, elastic hollow damping layer 201 is filled with damping liquid 202, multiple cylinder 203 are fixed in elastic hollow damping layer 201 and are communicated, multiple through slots 106 are set in pressing plate 105, cylinder 203 can be penetrated from the corresponding through slot 106.

[0027] Wherein, mounting bracket 103 top is provided with threaded hole 108, connecting rib 104 is provided with round hole 107, bolt 109 is penetrated in round hole 107, bolt 109 and threaded hole 108 are screw-threaded connection, recess 207 is set in the top of backing plate 102, elastic damping layer 208 is placed in recess 207, elastic damping layer 208 and the bottom of rail body 101 are attached.

[0028] When using, cylinder 203 is penetrated from the corresponding through slot 106, then two elastic hollow damping layers 201 are respectively tightly attached in the both sides of rail body 101, then bolt 109 is penetrated from round hole 107, then bolt 109 and threaded hole 108 are screw-threaded connection, so that connecting rib 104 and mounting bracket 103 are fixed, i.e. pressing plate 105 is fixed, so that elastic hollow damping layer 201 is constrained between rail body 101 and pressing plate 105.

[0029] In addition, piston 204 is sealingly and slidably connected in cylinder 203, multiple air holes 205 are set in one end of cylinder 203, spring 206 is arranged in cylinder 203, and one end of spring 206 is fixed with piston 204, the other end of spring 206 is fixed with the inner wall of cylinder 203, and piston 204 is located in cylinder 203 under normal form of spring 206.

[0030] When the steel rail body 101 produces vibration in use, the elastic hollow damping layer 201 is extruded, and the elastic hollow damping layer 201 can be deformed in resonance, thereby playing a role in noise reduction. Moreover, because the elastic hollow damping layer 201 is filled with the damping liquid 202, the damping liquid 202 can absorb the energy of the elastic hollow damping layer 201 in resonance, thereby reducing the amplitude of the resonance of the elastic hollow damping layer 201, further playing a role in noise reduction. When the elastic hollow damping layer 201 is extruded, the elastic hollow damping layer 201 extrudes the damping liquid 202, and the damping liquid 202 flows into the cylinder 203 after being extruded, so that the damping liquid 202 impacts the piston 204, the piston 204 moves in the cylinder 203, and the cylinder 203 compresses the spring 206 when moving, so that the spring 206 can absorb part of the energy of the resonance, thereby reducing the amplitude of the resonance again, playing a role in noise reduction again. Because of the multiple different forms of noise reduction, the effect of noise reduction is improved.

[0031] The above describes the exemplary embodiments of the scheme proposed by the present disclosure in detail with reference to the preferred embodiments, however, those skilled in the art can understand that various modifications and changes can be made to the above specific embodiments, and various technical features and structures proposed by the present disclosure can be combined without departing from the concept of the present disclosure, and the protection scope of the present disclosure is determined by the appended claims.

Claims

1. A composite damper for reducing rail vibration noise, characterized by, Include: The main unit (100) includes a steel rail body (101), the bottom of the steel rail body (101) is provided with a base plate (102), the top of the base plate (102) is fixed with a mounting frame (103) at four corners, the mounting frame (103) is provided with a connecting rib (104), and the connecting rib (104) is fixed with a pressing plate (105) at one end; The noise reduction unit (200) includes two elastic hollow damping layers (201), and the two elastic hollow damping layers (201) are arranged on both sides of the steel rail body (101), respectively, the elastic hollow damping layer (201) is filled with damping liquid (202), and a plurality of cylinder bodies (203) are fixed in the elastic hollow damping layer (201) and are communicated, a plurality of through grooves (106) are formed in the pressing plate (105), and the cylinder body (203) can penetrate through the corresponding through groove (106).

2. A composite damper for reducing rail vibration noise according to claim 1, wherein The piston (204) is sealingly and slidably connected in the cylinder body (203), and a plurality of air holes (205) are formed in one end of the cylinder body (203).

3. A composite damper for reducing rail vibration noise according to claim 2, wherein The spring (206) is arranged in the cylinder body (203), one end of the spring (206) is fixed with the piston (204), and the other end of the spring (206) is fixed with the inner wall of the cylinder body (203).

4. The composite damper for reducing vibration noise of a steel rail according to claim 1, wherein The mounting frame (103) is provided with a threaded hole (108) at the top, the connecting rib (104) is provided with a round hole (107), the bolt (109) penetrates through the round hole (107), and the bolt (109) is screwed with the threaded hole (108).

5. The composite damper for reducing vibration noise of a steel rail according to claim 1, wherein The base plate (102) is provided with a recess (207) at the top, the recess (207) is placed with an elastic damping layer (208), and the elastic damping layer (208) is attached to the bottom of the steel rail body (101).

6. The composite damper for reducing vibration noise of a steel rail according to claim 3, wherein The spring (206) is in a normal state, and the piston (204) is located in the cylinder body (203).

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