阅读说明：本技术 一种刚性连接的宽频带复合型钢轨动力吸振装置 (Rigidly-connected broadband composite steel rail dynamic vibration absorption device ) 是由 高晓刚 王安斌 徐忠辉 鞠龙华 刘浪 李炜 于 2020-04-10 设计创作，主要内容包括：本发明涉及一种刚性连接的宽频带复合型钢轨动力吸振装置,包括钢轨(1)、吸振器本体(2)及刚性固定架(3),所述的吸振器本体(2)包括中心长轴(201)、以及位于中心长轴的两端的端部夹持块、位于中心长轴中间间隔错开排布的多个中间弹性单元(204)与中间质量块(205),其中第一端部夹持块(203)和第二端部夹持块(206)与钢轨轨腰吻合接触,并通过刚性固定架(3)固定于钢轨上。与现有技术相比,本发明刚性连接宽频带复合的可调频率设置,不仅提高了钢轨振动传播的衰减率,同时有效的控制了轮轨磨耗,降低了轨道交通振动噪声污染。(The invention relates to a rigidly-connected broadband composite type steel rail dynamic vibration absorber which comprises a steel rail (1), a vibration absorber body (2) and a rigid fixing frame (3), wherein the vibration absorber body (2) comprises a central long shaft (201), end clamping blocks positioned at two ends of the central long shaft, a plurality of middle elastic units (204) and middle mass blocks (205) which are positioned in the middle of the central long shaft and distributed at intervals in a staggered mode, wherein a first end clamping block (203) and a second end clamping block (206) are in fit contact with the rail web of the steel rail and are fixed on the steel rail through the rigid fixing frame (3). Compared with the prior art, the rigid connection broadband composite adjustable frequency setting improves the attenuation rate of the vibration propagation of the steel rail, effectively controls the abrasion of the wheel rail and reduces the vibration noise pollution of the rail transit.)

1. The utility model provides a broadband compound rail power vibration absorber of rigid connection, includes rail (1), bump leveller body (2) and rigidity mount (3), its characterized in that, bump leveller body (2) including central major axis (201), and be located the tip grip block at the both ends of central major axis, be located central major axis middle interval stagger a plurality of middle elastic element (204) and middle quality piece (205) of arranging, wherein first tip grip block (203) and second tip grip block (206) coincide with the rail web of rail and contact to be fixed in on the rail through rigidity mount (3).

2. The rigidly connected broadband composite rail dynamic vibration absorber according to claim 1, wherein the intermediate elastic unit (204) and the intermediate mass (205) are not in contact with the rail.

3. The rigidly connected broadband composite type rail dynamic vibration absorber of claim 1, wherein a plurality of groups of compression-shear elastic mass resonance systems are formed by adjusting the shape, size, number and mutual position relationship of the intermediate elastic unit (204) and the intermediate mass block (205), at least two or more vibration frequencies can be controlled, and a broadband composite type rail dynamic vibration absorber is formed.

4. The rigidly connected broadband composite type steel rail dynamic vibration absorber device as claimed in claim 1, wherein the central long shaft (201) is sleeved with an elastic shaft sleeve (209), and a plurality of intermediate elastic units (204) and intermediate mass blocks (205) are sequentially staggered and penetrate through the outer surface of the elastic shaft sleeve (209) of the central long shaft (201).

5. The rigidly connected broadband composite type steel rail dynamic vibration absorber device as claimed in claim 4, wherein the intermediate mass (205) and the elastic shaft sleeve (209) form a first spring-mass resonance system, and the first spring-mass resonance system is in a mode of vertical extrusion or transverse shear;

the middle elastic unit (204) and the middle mass block (205) form a second spring mass resonance system, the vibrator direction of the second spring mass resonance system is vertical, horizontal or longitudinal along the length of the steel rail, and meanwhile, the second spring mass resonance system has radial extrusion along a central long axis (201) and longitudinal shearing composite effect along the length direction of the steel rail.

6. The rigidly connected broadband composite type steel rail dynamic-vibration absorbing device of claim 1, 2, 3 or 4, wherein the external shapes of the middle elastic unit (204) and the middle mass block (205) are circular, square or diamond.

7. The rigidly-connected broadband composite type steel rail dynamic vibration absorber device as claimed in claim 1, wherein the end clamping block of the vibration absorber body (2) is inserted into the central long shaft (201), and an embedded elastic body (208) and an embedded metal block (207) are sequentially arranged between the end clamping block and the central long shaft (201), wherein a concave-convex matching structure is formed between the embedded elastic body (208) and an inner cavity of the end clamping block, and a concave-convex matching structure is formed between the inner cavity of the embedded elastic body (208) and the embedded metal block (207);

a spring mass resonance system of the central long shaft is formed between the central long shaft (201) and the end clamping block through an embedded elastic body (208), and the vibrator direction is vertical, horizontal or longitudinal along the length of the steel rail;

the embedded metal block (207) and the embedded elastic body (208) form an auxiliary spring mass system, and the resonance direction is transverse or vertical.

8. The rigidly connected broadband composite type steel rail dynamic vibration absorber device as claimed in claim 1, wherein the end of the central long axis (201) of the vibration absorber body (2) is provided with an external thread, the length of the external thread ensures that the vibration absorber body (2) is clamped and the intermediate elastic unit (204) has a compression capacity, and the external thread is matched and locked with the nut (202); the cross-sectional shape of the central long axis (201) is circular, square, stepped or other shape.

9. The rigidly-connected broadband composite type steel rail dynamic vibration absorber of claim 1, wherein the rigid fixing frame (3) comprises a connecting bottom plate (301), a body pressing plate (302) and bolts, the connecting bottom plate (301) penetrates through the rail bottom of the steel rail and contacts with the rail bottom, one end of the body pressing plate (302) is connected with the end clamping block in a matching manner, and the other end of the body pressing plate is rigidly connected with the under-rail connecting bottom plate (301) to rigidly fix the vibration absorber on the steel rail (1).

10. The rigidly connected broadband composite type steel rail dynamic vibration absorber device according to claim 1, wherein the end clamping block comprises a boss pillar, and the body pressing plate (302) is provided with a through hole (303) rigidly matched with the boss pillar of the end clamping block.

Technical Field

The invention relates to the technical field of rail transit, in particular to a rigidly-connected broadband composite type steel rail dynamic vibration absorption device, which is particularly used for vibration absorption control of vibration and noise generated by forced steel rails in the running process of rail vehicles.

Background

At present, when urban rail transit is rapidly developed and a rapid and safe trip mode is provided for people, the noise and vibration problems generated by the urban rail transit also seriously affect the life quality of surrounding residents, endanger the safety of buildings around lines and influence the stability, safety and service life of a rail. Research shows that when the train speed is lower than 100km/h of a rail traffic line, rolling noise formed between wheel rails is a main component of rail traffic noise and vibration, wherein the contribution of medium-frequency noise and high-frequency noise radiated by rail vibration to the final noise amount is particularly obvious. The most effective method of vibration noise control is to take measures from a vibration source or block the propagation path of vibration noise. Therefore, the treatment of the vibration and the noise of the steel rail has important significance for vibration reduction and noise reduction of urban rail transit.

In order to control the vibration and noise of the steel rail, engineers have developed various types of vibration and noise reduction products, wherein tuned vibration dampers are common, and a tuned device composed of a mass-spring generates a reaction force to do work and consume energy when the steel rail vibrates, so that the vibration of the steel rail is reduced, for example, the steel rail vibration damper disclosed in patent CN202530345U, and such products have certain vibration and noise reduction effects. However, in engineering application, the mass block of the product is coated with an elastic body, the elastic body is exposed in a tunnel humid or overhead insolation environment, and the elastic body is seriously influenced by environmental aging; meanwhile, the installation mode of the steel rail vibration absorber is directly contacted with the upper surface of the elastic body through the buckle, along with periodic wheel rail impact, the contact surface of the elastic body contacted with the buckle is corroded by the environment and is abraded by contact to generate cracks which seriously fall off and fall off blocks, the metal buckle also has the defects of insufficient clamping force and the like caused by periodic fatigue, and the vibration attenuation and noise reduction effects are directly influenced.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide a rigidly-connected broadband composite type steel rail dynamic vibration absorber with long service life and good sound absorption and noise reduction effects.

The purpose of the invention can be realized by the following technical scheme: a rigidly connected broadband composite type steel rail dynamic vibration absorber comprises a steel rail (1), a vibration absorber body (2) and a rigid fixing frame (3), wherein the vibration absorber body is symmetrically arranged on two sides of a rail web through the rigid fixing frame.

The vibration absorber body (2) comprises a central long shaft (201), end clamping blocks positioned at two ends of the central long shaft, a plurality of middle elastic units (204) and middle mass blocks (205) which are positioned in the middle of the central long shaft and are distributed at intervals in a staggered mode, wherein a first end clamping block (203) and a second end clamping block (206) are in fit contact with the rail web of the steel rail and are fixed on the steel rail through a rigid fixing frame (3).

The middle elastic unit (204) and the middle mass block (205) are not in contact with the steel rail.

The contact matching positions of the central long shaft of the vibration absorber body, the end clamping blocks and the middle mass block are provided with middle elastic materials, a plurality of groups of elastic mass resonance systems for extrusion and shearing are formed by adjusting the shape, size, quantity and mutual position relation of the middle elastic units (204) and the middle mass block (205), at least two or more vibration frequencies can be controlled, and the dynamic vibration absorber with composite broadband is formed.

The central long shaft (201) is sleeved with an elastic shaft sleeve (209), and a plurality of middle elastic units (204) and middle mass blocks (205) are sequentially staggered to penetrate through the outer surface of the elastic shaft sleeve (209) of the central long shaft (201).

The middle mass block (205) and the elastic shaft sleeve (209) form a first spring mass resonance system, and the resonance mode of the first spring mass resonance system is vertical or horizontal (vertical to the rail web direction);

the middle elastic unit (204) and the middle mass block (205) form a second spring mass resonance system, the vibrator direction of the second spring mass resonance system is vertical, horizontal or longitudinal along the length of the steel rail, and meanwhile, the second spring mass resonance system has radial extrusion along a central long axis (201) and longitudinal shearing composite effect along the length direction of the steel rail. The natural frequency of the system can be adjusted in a wide frequency band by changing the shape, the size or the number of the middle elastic units (204) and the middle mass blocks (205). The shapes of the middle elastic unit (204) and the middle mass block (205) are circular, square or diamond.

The end clamping block of the vibration absorber body (2) is arranged on the central long shaft (201) in a penetrating mode, an embedded elastic body (208) and an embedded metal block (207) are sequentially arranged between the end clamping block and the central long shaft (201), a concave-convex matching structure is formed between the embedded elastic body (208) and an inner cavity of the end clamping block, and a concave-convex matching structure is formed between the inner cavity of the embedded elastic body (208) and the embedded metal block (207);

a spring mass resonance system of the central long shaft is formed between the central long shaft (201) and the end clamping block through an embedded elastic body (208), and the vibrator direction is vertical, horizontal or longitudinal along the length of the steel rail;

the embedded metal block (207) and the embedded elastic body (208) form an auxiliary spring mass system, and the resonance direction is transverse or vertical.

The end parts of the central long shaft (201) of the vibration absorber body (2) are respectively provided with threads, the length of the external threads ensures that the vibration absorber body (2) is clamped, the compression amount of the middle elastic unit (204) can be ensured, and the external threads are matched and locked with the nut (202); the cross-sectional shape of the central long axis (201) is circular, square, stepped or other shape.

The rigid fixing frame (3) is composed of a connecting bottom plate (301), a body pressing plate (302) and bolts, the connecting bottom plate (301) penetrates through the rail bottom of the steel rail and contacts with the rail bottom, one end of the body pressing plate (302) is connected with the end clamping block in a matched mode, the other end of the body pressing plate is connected with the rail lower connecting bottom plate (301) in a rigid mode, and the vibration absorption device is rigidly fixed on the steel rail (1). The number of the rigid fixing frames required by the vibration absorbing device body is determined by the number of the middle mass blocks and the middle elastic units.

The end clamping block comprises a boss column, and the body pressing plate (302) is provided with a through hole (303) which is in rigid fit with the boss column of the end clamping block.

Because of different working conditions of the track structure and running vehicles, the vibration and noise of the track system have the characteristics of wide frequency band and multi-frequency band, the invention adopts the broadband composite steel rail vibration absorber with rigid connection, and is one of the methods for solving/reducing the vibration noise problem of the track system from the source head from the track. The dynamic vibration absorber can greatly reduce the vibration amplitude of the steel rail, so that the noise vibration radiation caused by vibration is reduced.

Compared with the prior art, the invention starts from the source of generating problems and achieves the aim of controlling or reducing the vibration noise of a track system. The invention has the following advantages that: the intermediate resonance mass and the elastic block are not in contact with the steel rail, and the surface of the central shaft is coated with the elastic layer, so that the mass spring unit forms a multi-degree-of-freedom extrusion and shearing type spring mass system along the rail system, and the related frequency is in a wide frequency band range; the vibration absorber body is connected with the steel rail through the rigid fixing frame, the problems of elastic connection attenuation and vibration absorber falling of the existing vibration absorber are solved, the consumption of the transverse vibration energy of the steel rail is further improved by improving the center of the vibration absorber body while the transverse and vertical vibration of the curve section of the rail transit is aimed at, and meanwhile, the transmission of the vibration energy along the rail direction is restrained.

Drawings

FIG. 1 is an overall view of an embodiment 1 of the present invention;

FIG. 2 is a left side view of embodiment 1 of the present invention;

fig. 3 is a front view of the vibration absorber body of embodiment 1 of the present invention;

fig. 4 is a sectional view of the vibration absorber body of embodiment 1 of the present invention;

FIG. 5 is a schematic view of an end clamp block of embodiment 1 of the present invention;

FIG. 6 is a schematic diagram of the structure of the elastomer embedded in the inner cavity of the end clamping block of embodiment 1 of the present invention;

FIG. 7 is a schematic diagram of a metal structure embedded in an inner cavity of an end clamping block according to embodiment 1 of the present invention;

FIG. 8 is a schematic diagram of an intermediate elastic unit according to embodiment 1 of the present invention;

FIG. 9 is a schematic view of an intermediate mass of embodiment 1 of the present invention;

FIG. 10 is a schematic view of a central long axis of embodiment 1 of the present invention;

FIG. 11 is a schematic view of a rigid fixing frame according to embodiment 1 of the present invention;

the reference numbers in the figures indicate: the vibration absorber comprises a steel rail 1, a vibration absorber body 2, a central long shaft 201, a nut 202, a first end clamping block 203, a middle elastic unit 204, a middle mass block 205, a second end clamping block 206, an embedded metal block 207, an embedded elastic body 208, an elastic shaft sleeve 209, a rigid fixing frame 3, a connecting bottom plate 301, a body pressing plate 302 and a pressing plate through hole 303.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.