CN212801038U - Rigidly connected broadband composite steel rail dynamic vibration absorption device - Google Patents

Abstract

The utility model relates to a compound rail dynamic vibration absorber of broadband of rigid connection, including rail (1), bump leveller body (2) and rigidity mount (3), 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 the central major axis middle interval stagger a plurality of middle elastic element (204) of arranging and middle quality piece (205), wherein first end grip block (203) and second end grip block (206) and rail web contact that coincide to be fixed in on the rail through rigidity mount (3). Compared with the prior art, the utility model discloses the compound adjustable frequency setting of rigid connection broadband has not only improved the decay rate of rail vibration propagation, and effectual control wheel rail wearing and tearing have reduced rail transit vibration noise pollution simultaneously.

Description

Rigidly connected broadband composite steel rail dynamic vibration absorption device

Technical Field

The utility model relates to a track traffic technical field, concretely relates to compound rail dynamic vibration absorber of broadband of rigid connection is used for rail vehicle operation in-process rail compelled and the vibration of production and the control of inhaling of noise very much.

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 vibration and noise of the steel rail, engineers develop various types of vibration and noise reduction products, wherein a tuned vibration absorber is common, and a tuned device formed by a mass-spring generates a reaction force when the steel rail vibrates to do work and consume energy so that vibration of the steel rail is reduced, for example, the steel rail vibration absorber disclosed in patent CN202530345U has certain vibration and noise reduction effects. However, in engineering application, the product mass block is coated with the elastomer, the elastomer is exposed in a tunnel humid or overhead insolation environment, and the elastomer 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, so that the elastic body is seriously fallen off and the block falls off, the metal buckle also has the defects of insufficient clamping force and the like caused by periodic fatigue, and the vibration and noise reduction effect is directly influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a long service life, inhale the compound rail dynamic vibration absorber device of broadband of the rigid connection that sound noise reduction effect is good in order to overcome the defect that above-mentioned prior art exists.

The purpose of the utility model can be realized through 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 in a staggered mode at intervals, 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, size or number of the intermediate elastic units (204) and the intermediate 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 connecting bottom plate (301) below the steel rail 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 the different operating modes of track structure and operation vehicle, the vibration of track system and noise have the characteristics of wide band, multifrequency section, the utility model discloses a compound rail vibration absorber of broadband with rigid connection is one of the method of solving/reducing track system's vibration noise problem from the source 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 utility model discloses starting with the source that produces the problem, reach control or reduce track system's vibration noise, the utility model provides a device is inhaled to compound rail dynamic of broadband of rigid connection, the device should inhale and constitute multistage resonance assembly through a plurality of independent spring mass systems of central major axis connection, and the resonant mass piece is then arranged along the length direction of rail and is formed undulant dynamic damping bump leveller. The utility model discloses the biggest advantage of difference current patent: 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 broadband 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 according to embodiment 1 of the present invention;

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

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

fig. 6 is a schematic structural view of an elastomer embedded in an inner cavity of an end clamping block in embodiment 1 of the present invention;

fig. 7 is a schematic view of a metal structure embedded in an inner cavity of an end clamping block in embodiment 1 of the present invention;

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

fig. 9 is a schematic view of an intermediate mass block according to 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 present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Example 1

Referring to fig. 1-2, a rigidly connected broadband composite type rail dynamic vibration absorber comprises a rail 1, a vibration absorber body 2 and a rigid fixing frame 3, wherein an end clamp block 203 of the vibration absorber body 2 is contacted with the rail web of the rail 1, and the vibration absorber body 2 is symmetrically arranged at two sides of the rail web through the rigid fixing frame 3. The vibration absorber device body 2 consists of a central long shaft 201, an end nut 202, a first end clamping block 203, a middle elastic unit 204, a middle mass block 205, a second end clamping block 206 and the like, wherein the end nut 202, the first end clamping block 203, the middle elastic unit 204 and the middle mass block 205 sequentially penetrate through the central long shaft; the end clamping block of the vibration absorber body is in fit contact with the rail web of the steel rail, and the middle mass block 205 and the middle elastic unit 204 are not in contact with the steel rail; the contact matching position of the central long shaft 201 of the vibration absorber body 2, the end clamping block and the middle mass block is provided with a middle elastic material, and by adjusting the factors such as the shape, the size, the quantity, the mutual position relation and the like of the middle mass block and the elastic body, the vibration absorber device can form a plurality of groups of elastic mass resonance systems such as extrusion, shearing and the like, at least two or more vibration frequencies can be controlled, and a broadband composite dynamic vibration absorber is formed; the rigid fixing frame is rigidly connected with the vibration absorber body, and the vibration absorber body is rigidly fixed on the steel rail through bolts.

As shown in fig. 3, 4, 8, 9 and 5, the middle elastic unit 204 and the middle mass block 205 of the vibration absorber body 2 are sequentially staggered and penetrated on the outer surface of the elastic shaft sleeve 209 of the central long shaft 201 through bonding, and the middle elastic unit and the middle mass block are installed without contacting with the steel rail; the middle mass block 205 and the central elastic shaft sleeve 209 form a vertical and transverse (perpendicular to the rail web direction) spring mass resonance system; the middle mass 205 and the middle elastic unit 204 also form a second spring mass resonance system, and the vibrator direction can be vertical, horizontal or longitudinal along the length of the steel rail, and simultaneously has the composite effects of radial extrusion along the central long axis 201, longitudinal shearing along the length of the steel rail and the like. A wide band of tuning system natural frequencies can be achieved by changing the shape, size or number of the intermediate elastic element 204 and the intermediate mass 205. The shapes of the middle mass block 205 and the middle elastic unit 204 may be circular, square, diamond, etc.

As shown in fig. 5 to 7, the inner cavity of the first end holding block 203 of the vibration absorber body 2 is matched with the boss of the embedded elastic body 208, and the inner cavity matching surface of the first end holding block 203 can also be a groove; the inner cavity of the embedded elastomer 208 is matched with the concave-convex structure of the embedded metal block 207, and the matching surface of the inner cavity of the elastomer can be a groove or a boss; the embedded metal block 207 and the embedded elastomer 208 form another auxiliary spring mass system, and the resonance direction can be transverse or vertical.

As shown in fig. 10, the ends of the central long axis 201 of the vibration absorber body 2 are respectively provided with threads, and are matched and clamped with nuts 202; the shape of the central long axis 201 can be round, square, ladder-shaped or other cross-sectional shapes; the spring mass resonance system of the central long shaft is also formed between the central long shaft 201 of the vibration absorber body 2 and the first end clamping block 203 and the second end clamping block 206 through the elastic body 208, and the vibrator direction can be vertical, horizontal or longitudinal along the length of the steel rail.

As shown in fig. 2 and 11, 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 passes through the rail bottom of the steel rail and contacts with the rail bottom, a through hole 303 at one end of the body pressing plate 302 is rigidly matched with the boss columns of the end clamping blocks 203 and 206, and the other end of the body pressing plate 302 and the rail bottom connecting bottom plate 301 are rigidly connected and screwed through bolts and nuts respectively, so that the vibration absorbing device is rigidly fixed on the steel rail 1. The number of rigid fixing frames 3 required for the vibration absorbing device body 2 is determined by the number of the intermediate mass blocks 205 and the intermediate elastic units 204.

Example 2

The embodiment 2 is basically the same as the embodiment 1 in structure and requirements, except that the embodiment 2 raises the center height of the center long shaft 201 and raises the gravity center position of the vibration absorbing equipment body. The main purpose of the design rail vibration absorber is to reduce the vibration of rail itself, because the track traffic route has the straightway also to have the curve section, embodiment 1 is effectual at the straightway, embodiment 2 mainly considers when the train passes through the curve section, the transverse vibration of rail is greater than vertically, the vibration of rail railhead also obviously is greater than the vibration at rail angle simultaneously, the utility model discloses the device is in order to play the better effect of absorbing vibration, must laminate at the railhead as far as possible and reduce the vibration of railhead, therefore, embodiment 2 designs to go up the focus of central major axis 201 and improves, mass spring system position has been raised simultaneously, can further reduce the transverse and torsional vibration of rail railhead, improve the torsional rigidity of rail.

Example 3

Example 3 is basically the same as examples 1 and 2 in structure and requirement, except that example 3 changes the supporting structure of the rigid fixing frame 3, the rigid fixing frame 3 is divided into a body pressing plate upper structure 302 for lifting the vibration absorber body position, and is fixed as close as possible to the rail head position, and the body pressing plate 302 lower structure of the rigid fixing frame 3 is fixed at the rail corner. The main purpose of the design is to reduce the vibration of the rail head of the steel rail by adopting the position of the vibration absorption device when the train passes through the curve section.

The utility model discloses above-mentioned structure and current damping body compare the advantage and lie in:

1. the elastomer of the existing vibration absorber is completely exposed in a humid or insolation environment, and the elastomer is seriously influenced by environmental aging; the central elastic shaft sleeve 209 with the largest area of the utility model is coated inside and is not influenced by the environment, the only middle elastic unit 204 exposed outside and the middle mass block 205 are arranged in a staggered way, the width of the central elastic shaft sleeve is only (1-2)/10 of the width of the adjacent middle mass block, and the central elastic shaft sleeve is easy to replace even if the central elastic shaft sleeve is aged;

2. the existing steel rail vibration damper is mounted in a way that an elastic buckle is directly contacted with the upper surface of an elastic body, along with periodic wheel rail impact vibration, environmental corrosion and contact abrasion occur on the contact surface of the elastic body to generate cracks, and the elastic buckle falls off blocks when the cracks are serious, and meanwhile, the metal elastic buckle has the defects of insufficient clamping force and the like caused by periodic fatigue, so that the vibration damping and noise reduction effects are directly influenced; and the utility model discloses fixed knot constructs is that the boss of metal block is connected on mount 3 and the tip clamp splice, and the tip clamp splice contacts with the rail completely, and the connection process all is rigid, consequently, the phenomenon that the environmental corrosion crackle is serious and drops the piece can not appear. The vibration absorber body is connected with the steel rail through the rigid fixing frame, and the problems that the vibration absorber falls off and the like caused by the elastic connection attenuation of the conventional vibration absorber are solved.

3. The utility model discloses manage the utility model discloses the device of shaking absorber only has tip grip block and rail contact, and the middle quality piece 205 as the oscillator not only forms extrudability with elastic block 204, forms compound functions of shaking such as shearing type with middle major axis elastic shaft sleeve 209 moreover. From single free vibration systems

It can know, because the utility model discloses a mass block is big relatively current shock absorber, and the whole quality of bump leveller body is enlargied, will extend to the low frequency in the aspect of the control frequency, makes its rigidity also increase with the elastic unit attenuation (middle elastic block unit and the elastic shaft sleeve on the major axis) of mass oscillator combination simultaneously, and consequently compound bump leveller design can make the utility model discloses a control frequency range is at 200 + 1500Hz (horizontal and vertical), and the vibration level of anticipated rail reduces 15-25dB, the noise radiation level caused by the corresponding wheel-track coupling is reduced by 5-10dB (A).

The above embodiments are only used for illustrating the technical solution of the present invention, and are not intended to limit the present invention, and those skilled in the art can make equivalent changes, substitutions, modifications, and simplifications within the scope of the present invention, without departing from the spirit of the present invention, and shall also fall within the protection scope of the claims of the present invention.

Claims (10)

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 or step-shaped.

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 9, wherein the end clamping block comprises a boss pillar, and the body pressing plate (302) is provided with a through hole (303) rigidly matching with the boss pillar of the end clamping block.

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