CN113529497B - Track vibration damping system - Google Patents
Track vibration damping system Download PDFInfo
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- CN113529497B CN113529497B CN202010315445.4A CN202010315445A CN113529497B CN 113529497 B CN113529497 B CN 113529497B CN 202010315445 A CN202010315445 A CN 202010315445A CN 113529497 B CN113529497 B CN 113529497B
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B19/00—Protection of permanent way against development of dust or against the effect of wind, sun, frost, or corrosion; Means to reduce development of noise
- E01B19/003—Means for reducing the development or propagation of noise
Abstract
The invention provides a track vibration damping system which comprises a steel rail and a vibration damper, wherein the vibration damper is arranged on the outer surface of the steel rail and comprises a first vibration damping part, a second vibration damping part, a connecting module and an adjusting module, the first vibration damping part and the second vibration damping part are connected through the connecting module, one end of the adjusting module is pressed on the first vibration damping part, the other end of the adjusting module is pressed on the second vibration damping part, and the adjusting module is used for adjusting the pretightening force among the first vibration damping part, the second vibration damping part and the steel rail. Through adjusting module's setting, be convenient for adjust and apply the pressure in first damping portion and second damping portion, adjust the pretightning force between shock absorber and the rail as required promptly, keep good contact relation with the rail surface all the time with guaranteeing the shock absorber, keep better damping effect all the time promptly, can reduce first damping portion and second damping portion again through adjusting the pretightning force simultaneously owing to the warpage scheduling problem that the installation brought, still can change system frequency response characteristic, with the demand of making an uproar falls in the damping that adapts to different circuits.
Description
Technical Field
The invention relates to the technical field of rail transit, in particular to a rail vibration reduction system.
Background
The rail transit is increasingly important in the modern society, and brings great convenience and noise problems to people. Particularly, as the vehicle speed increases, the vibration noise is increasingly generated. The track noise causes great damage to the surrounding sound environment, and particularly to passengers, the track noise seriously harms the health of people. In the running process of a train, the vibration of the steel rail is a main reason for generating wheel rail noise. Therefore, the measures for reducing vibration and noise are the most effective and direct ways.
The method for damping and reducing noise of the rail by adhering a damping structure on the surface of the rail mainly comprises the following steps: the damping layer, the metal constraining plate and other materials are sequentially adhered to the rail web of the steel rail and the upper surface of the rail bottom. For example, a patent with publication number CN102304881A in the prior art discloses a steel rail damping vibration absorber, which is structured such that a damping layer, a metal constraining slab layer and a magnetic material layer are sequentially laid on the rail web of a steel rail from inside to outside. Wherein the damping layer includes first damping layer and second damping layer, and the metal restraint sheet layer includes first metal restraint sheet layer and second metal restraint sheet layer, and first damping layer, first metal restraint sheet layer, magnetic material layer, second damping layer and second metal restraint sheet layer are laid from inside to outside in proper order, and the second metal restraint sheet layer outside also has the rubber protection layer. Simultaneously for guaranteeing to paste intensity and fatigue life, fixed fixture structure is still adopted to damping structure, for example the patent of publication No. CN102268850A discloses a track damping shock absorber, including laying the damping structure of orbital rail waist department, still includes the centre gripping damping structure is close to the clamping assembly of rail waist, and this clamping assembly includes left clamping part and right clamping part to and connect dismantled and assembled left side clamping part with right clamping part's adapting unit.
However, the rail damper in the prior art has the following disadvantages: 1) The intensity of radiation noise at different positions of the steel rail is different, the noise radiation of the transition area of the upper surface of the rail web and the rail bottom is relatively small, and the prior art usually takes all areas from the rail web to the rail bottom into consideration; 2) In the prior art, especially the related curve arc section can not ensure the tightness between each surface and the surface of the steel rail in the pasting process, and if a place which is not tightly pasted exists, the structure is easy to fall off under the fatigue condition, so that the vibration reduction and noise reduction functions are lost; 3) Meanwhile, in the prior technical scheme, the middle part and the parts above the rail web are lack of support, and the adhesion mode is easy to fatigue fracture in the long-term vibration environment of the steel rail; 4) The vibration and noise reduction effects of all road sections cannot be ensured to be in the best state by adopting the damping structures with the same specification because the vibration and sound radiation characteristics of the steel rails are different in different roads or different in vibration reduction measures.
The prior art generally adopts a mode that a multi-layer structure of a restraint layer, a damping layer and other layers is adhered to the upper surface of a rail bottom to a rail web, the fixing mode of the structure is a mode of adhesion and clamping of a rail bottom clamp, the adhesion mode is easy to lose efficacy under the fatigue vibration condition of a steel rail, and even if the rail bottom is clamped by the clamp, the function of restraining, damping, vibration attenuation and noise reduction cannot be ensured on the condition that a binder fails. Meanwhile, in the curve section, because the steel rail is in a bent state, the existing scheme is difficult to enable the damper to be completely and tightly attached to the surface of the steel rail in the bent state, and therefore when one side of the damper is attached tightly, the other side of the damper is easy to warp, and the effect of the existing scheme is further influenced.
In addition damping structure among the prior art, adopt the multilayer form mostly or set up the multilayer into the integral type structure, because the structure is too big, consequently the rail web part pastes the mode and can inevitably take place to peel off the condition that drops under the long-term vibration of track, and there is great degree of difficulty in the curved surface structure of current structure in manufacturing process, this structure is when the part drops to peel off simultaneously, can't be difficult to maintain the transformation to local, can only all remove the back again polish brush glue etc. paste the installation, damping structure among the prior art lacks adjustable setting in addition, damping noise reduction effect when different circuit operating modes will have very big loss, can not exert its ideal damping noise reduction effect.
Disclosure of Invention
In view of this, the present invention provides a track damping system to solve the problems that the track damping structure in the prior art lacks adjustable setting, the damping and noise reduction effects are lost, and the track damping structure cannot be used for a long time.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a track vibration damping system comprises a steel rail and a vibration damper, wherein the vibration damper is arranged on the outer surface of the steel rail and comprises a first vibration damping part, a second vibration damping part, a connecting module and an adjusting module, the first vibration damping part and the second vibration damping part are connected through the connecting module, one end of the adjusting module is pressed on the first vibration damping part, the other end of the adjusting module is pressed on the second vibration damping part, and the adjusting module is used for adjusting pretightening force among the first vibration damping part, the second vibration damping part and the steel rail. Through the setting of adjusting module, be convenient for adjust the pressure of applying in first damping portion and second damping portion, and then can adjust first damping portion as required, pretightning force between second damping portion and the rail, avoid the pretightning force too big to cause the inboard long-term atress of first damping portion and second damping portion to lead to the damping function to become invalid, simultaneously can avoid first damping portion and second damping portion both ends warpage again, and then avoid first damping portion and second damping portion to drop from the rail side surface, adjust the frequency response characteristic that the pretightning force can change between shock absorber and the rail simultaneously, with the demand of making an uproar falls in the damping that adapts to different circuits.
Furthermore, the first vibration damping part is arranged at the rail web of the steel rail, the second vibration damping part is arranged on the upper surface of the rail foot of the steel rail, and the connecting part of the rail web and the rail foot of the first vibration damping part and the second vibration damping part is a curve segment.
Furthermore, the first vibration reduction part and the second vibration reduction part respectively comprise at least one damping layer and at least one constraint layer, the positions, attached to the steel rail, of the inner sides of the first vibration reduction part and the second vibration reduction part are arranged to be the damping layers, the outer sides of the first vibration reduction part and the second vibration reduction part are arranged to be the constraint layers, and the rigidity of the connecting module is smaller than that of the constraint layers. The convenience is adjusted the bending angle of linking module at will in the installation in order to adapt to the laminating degree of first damping portion and second damping portion and rail side surface, even if the first damping portion that is located the rail web side drops in the use, also can polish again in first damping portion region and paste under the condition of not demolising second damping portion.
Furthermore, the adjusting module comprises a first connecting portion and a second connecting portion, the first connecting portion is arranged on the outer side of the first vibration damping portion, the second connecting portion is arranged on the outer side of the second vibration damping portion, an adjusting column is arranged between the first connecting portion and the second connecting portion, and the pressure applied to the first vibration damping portion and/or the second vibration damping portion is increased or reduced through adjusting the adjusting column. The pre-tightening force of the first vibration reduction part and/or the second vibration reduction part can be adjusted. Even if the first vibration damping part and/or the second vibration damping part are/is stuck to fail in the long-term use process, the first vibration damping part and/or the second vibration damping part can be attached to the surface of the steel rail through the adjusting module, and the service life of the vibration damper is prolonged.
Further, first connecting portion include the arm of force and first fixed part, second connecting portion include arm of force and second fixed part down, it all sets up the arc structure of one end perk with the lower arm of force to go up the arm of force, adjust post one end with it connects to go up the arm of force, the other end with the arm of force is connected down.
Further, go up the first stiff end of the arm of force and fix the outside of first damping portion, the second stiff end of going up the arm of force sets up to the structure of perk of first damping portion to keeping away from, the third stiff end of the arm of force is fixed down the outside of second damping portion, the fourth stiff end of the arm of force sets up to the structure of perk of second damping portion to keeping away from down, adjust post one end with the second stiff end is connected, the other end of adjusting the post with the fourth stiff end is connected. The first fixing part plays a supporting role in supporting the upper force arm to prevent the upper force arm from being stressed and deformed, the second fixing part plays a supporting role in supporting the lower force arm to prevent the lower force arm from being stressed and deformed, and meanwhile, the first vibration reduction part and the second vibration reduction part are guaranteed to be stressed uniformly at all positions, and the working stability of the vibration absorber is improved.
Furthermore, first fixed part sets up the second stiff end is in one side of first damping portion surface, the second fixed part sets up the fourth stiff end is in one side of second damping portion.
Furthermore, the two ends of the adjusting column are provided with positioning structures, and the positioning structures are arranged at positions, located between the upper force arm and the lower force arm, on the adjusting column.
The fixing device comprises a bottom plate and fixing blocks, the bottom plate is located at the lower portion of the steel rail, the fixing blocks are arranged at two ends of the bottom plate, and the fixing blocks are buckled and pressed on the upper surface of a rail foot of the steel rail.
Furthermore, the connection module, the first vibration damping part and the second vibration damping part are integrally formed in a vulcanization mode, or two ends of the connection module are respectively welded to the first vibration damping part and the second vibration damping part in a welding mode.
Compared with the prior art, the track vibration damping system has the following advantages:
1) The damping device comprises a two-layer structure, wherein the inner side is a damping layer, the outer side is a constraint layer, and an adjustable pretightening force device is additionally arranged on the basis of the traditional sticking and rail foot clamp clamping and fixing mode, namely, the adjustable pretightening force device is arranged on the outer side of the constraint layer on the side surface of the rail web and the upper surface of the rail foot, so that the damping layers can be ensured to be always tightly attached to the surface of the steel rail, and even under the condition that the later fatigue generation part cannot be tightly attached, the pretightening force can be adjusted, so that the shock absorber is always tightly attached to the steel rail; meanwhile, the structure fully considers different circuit working conditions, particularly curve sections, namely under the adverse conditions of stronger transverse vibration of the curve sections and transverse bending conditions of the steel rails, the vibration frequency response characteristic of the steel rails can be changed through the adjustment of pretightening force, so that the vibration reduction and noise reduction effects under different circuit conditions are improved;
2) The shock absorber with adjustable pretightening force can ensure that resultant force applied to the first shock absorbing part and the second shock absorbing part is perpendicular to the surface of each shock absorbing part, ensure that the vertical resultant force avoids or reduces the generation of shear component force between an additional damping layer and the steel rail caused by external interference, simultaneously ensure that sufficient supporting force exists between each shock absorber and the steel rail, and avoid the shock absorber from falling off due to long-term violent movement of the steel rail.
Drawings
FIG. 1 is a schematic structural diagram of a rail vibration absorber according to an embodiment of the present invention;
FIG. 2 is a top view of a rail vibration absorber according to an embodiment of the present invention;
FIG. 3 is a left side view of a rail vibration absorber according to an embodiment of the present invention;
FIG. 4 is a bottom view of a rail vibration absorber according to an embodiment of the present invention;
FIG. 5 is a front view of a rail vibration absorber according to an embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a steel rail vibration absorber according to an embodiment of the present invention without a stud;
fig. 7 is an enlarged view of a portion of the conditioning module of fig. 1.
Description of reference numerals:
1-a first damping part, 11-a first damping layer, 12-a first constraining layer, 2-a second damping part, 21-a second damping layer, 22-a second constraining layer, 3-a connecting module, 4-an adjusting module, 41-a first connecting part, 411-an upper force arm, 412-a first fixing part, 413-a first fixing end, 414-a second fixing end, 42-a second connecting part, 421-a lower force arm, 422-a second fixing part, 423-a third fixing end, 424-a fourth fixing end, 43-an adjusting column, 44-a positioning structure, 5-a steel rail, 51-a rail web, 52-a rail foot, 53-a rail head, 6-a fixing device, 61-a bottom plate, 62-a fixing block
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
As shown in fig. 1, the present embodiment provides a track vibration damping system, which includes a steel rail 5 and a vibration damper, where the vibration damper is disposed on an outer surface of the steel rail 5, specifically, the vibration damper includes a first vibration damping portion 1, a second vibration damping portion 2 and a connection module 3, where the first vibration damping portion 1 and the second vibration damping portion 2 are disposed on a surface of the steel rail 5 for absorbing vibration from the steel rail 5, the first vibration damping portion 1 and the second vibration damping portion 2 are connected by the connection module 3, and the first vibration damping portion 1 and the second vibration damping portion 2 are curved at a connection portion of a rail web 51 and a rail foot 52, that is, the connection module 3 is a curved segment.
The damper described in this embodiment further includes an adjusting module 4, one end of the adjusting module 4 abuts against the first damping portion 1, and the other end abuts against the second damping portion 2, and the adjusting module 4 is used to adjust the pretightening force between the first damping portion 1, the second damping portion 2, and the steel rail 5.
Through the setting of adjusting module 4, be convenient for adjust the pressure of applying on first damping portion 1 and second damping portion 2, and then can adjust first damping portion 1 as required, pretightning force between second damping portion 2 and the rail, avoid the pretightning force too big 2 inboard long-term atresss of first damping portion 1 and second damping portion that cause to lead to inhaling the vibration function failure, simultaneously can avoid first damping portion 1 and 2 both ends warps of second damping portion again, and then avoid first damping portion 1 and second damping portion 2 to drop from 5 side surfaces of rail.
Furthermore, in the present embodiment, the first vibration damping portion 1 is adhered to a side surface of the rail web 51 of the rail 5, the second vibration damping portion 2 is adhered to an upper surface of the rail foot 52 of the rail 5, one end of the connection module 3 is connected to the first vibration damping portion 1, the other end is connected to the second vibration damping portion 2, and a connection portion between the rail web 51 and the rail foot 52 is a curved line segment.
Preferably, the connection module 3, the first vibration damping part 1 and the second vibration damping part 2 can be integrally formed by vulcanization, so that the installation of the vibration damper is facilitated. The two ends of the connecting module 3 may be welded to the first vibration damping portion 1 and the second vibration damping portion 2 respectively by welding.
Wherein, first vibration damping portion 1 and second vibration damping portion 2 all include at least one damping layer and at least one restraint layer, and damping layer and restraint layer interval set up, and the position of the 2 inboard and 5 laminating of rail of first vibration damping portion 1 and second vibration damping portion sets up to the damping layer, and the outside of first vibration damping portion 1 and second vibration damping portion 2 sets up to the restraint layer, and the damping layer sets up to viscoelastic damping material, and the restraint layer sets up to the great fixed knot of rigidity constructs. The rigidity of the connection module 3 is less than the rigidity of the constraining layer.
Preferably, the restriction layer sets up to the great, thicker metal sheet of rigidity, and connection module 3 sets up to the less, thinner metal sheet of rigidity, conveniently adjusts connection module 3's bending angle at will in the installation in order to adapt to the laminating degree of first damping portion 1 and second damping portion 2 and rail 5 side surface, even if lie in the first damping portion 1 of rail web 51 side and drop in the use, also can polish the region of first damping portion again and paste the installation under the condition of not demolising the second damping portion.
More preferably, the restraint layer and the damping layer are integrally formed by vulcanization, so that the processing and manufacturing are facilitated, the maintenance is easy, and the working procedures are reduced in the installation process, so that the time is saved.
As shown in fig. 1 to 6, the first vibration damping part 1 includes a first damping layer 11 and a first constraining layer 12, the second vibration damping part 2 includes a second damping layer 21 and a second constraining layer 22, the first damping layer 11 is directly adhered to the rail web 51, the second damping layer 21 is adhered to the upper surface of the rail foot 52, the first constraining layer 12 covers the outer side of the first damping layer 11, and the second constraining layer 22 covers the upper surface of the second damping layer 21.
In the embodiment of the present invention, the adjustment module 4 includes the first connection portion 41 and the second connection portion 42, the first connection portion 41 is disposed outside the first vibration damping portion 1, the second connection portion 42 is disposed outside the second vibration damping portion 2, the first connection portion 41 is welded to the constraining plate of the first vibration damping portion 1, or the first connection portion 41 is integrally provided with the constraining plate of the first vibration damping portion 1, and the second connection portion 42 is welded to the constraining plate of the second vibration damping portion 2, or the second connection portion 42 is integrally provided with the constraining plate of the second vibration damping portion 2.
An adjusting column 43 is arranged between the first connecting portion 41 and the second connecting portion 42, two ends of the adjusting column 43 are movably connected with the first connecting portion 41 and the second connecting portion 42 respectively, and the pressure exerted on the first vibration damping portion 1 and/or the second vibration damping portion 2 can be increased or reduced by adjusting the pressure of the adjusting column 43 on the first connecting portion 41 and/or the second connecting portion 42, so that the pre-tightening force of the first vibration damping portion 1 and/or the second vibration damping portion 2 can be adjusted. Even if the first vibration damping part 1 and/or the second vibration damping part 2 are/is stuck to fail in the long-term use process, the first vibration damping part 1 and/or the second vibration damping part 2 can be ensured to be attached to the surface of the steel rail 5 through the adjusting module 4, and the service life of the vibration damper is prolonged.
As shown in fig. 1 to 7, the first connecting portion 41 is fixed on the outer side of the first constraint layer 12, the first connecting portion 41 includes an upper force arm 411 and a first fixing portion 412, the second connecting portion 42 is fixed on the outer side of the second constraint layer 12, the second connecting portion 42 includes a lower force arm 421 and a second fixing portion 422, the upper force arm 411 and the lower force arm 421 are both configured to be an arc structure with one end tilted, one end of the adjusting column 43 is connected with the upper force arm 411, and the other end is connected with the lower force arm 421.
Further, a first fixing end 413 of the upper force arm 411 is fixed on the outer side of the first vibration damping portion 1, a second fixing end 414 of the upper force arm 411 is arranged to tilt away from the first vibration damping portion 1, the first fixing portion 412 is arranged on one side of the second fixing end 414 facing the first vibration damping portion 1, and the first fixing portion 412 supports the upper force arm 411 to prevent the upper force arm 411 from deforming due to stress. The second fixing end 414 is provided with a connecting hole for installing the adjusting column 43, so as to conveniently adjust the pressure of the adjusting column 43 on the first connecting portion 41 and the first constraint layer 12.
The third fixed end 423 of the lower force arm 421 is fixed at the outer side of the second vibration damping portion 2, the fourth fixed end 424 of the lower force arm 421 is arranged to be away from the tilting structure of the second vibration damping portion 2, the second fixing portion 422 is arranged at one side of the fourth fixed end 424 facing the second vibration damping portion 2, and the second fixing portion 422 supports the lower force arm 421 to prevent the lower force arm 421 from deforming due to force. A connecting hole is also formed in the fourth fixing end 424 for installing the adjusting post 43, so as to adjust the pressure of the adjusting post 43 on the second connecting portion 42 and the second constraint layer 22.
Preferably, the first fixing portion 412 and the second fixing portion 422 are both provided with two reinforcing rib plates, so that the stress of the upper force arm 411 and the lower force arm 421 is uniform, the deformation of the force arm when the pretightening force is adjusted is prevented, the stress of each part of the first vibration damping portion 1 and the second vibration damping portion 2 is also uniform, and the working stability of the vibration damper is improved.
The upper force arm 411 and the lower force arm 421 are both arranged in an arc structure, so that resultant forces respectively applied to the side surface of the rail web 51 and the upper surface constraint layer of the rail foot 52 through the upper force arm and the lower force arm can be at least perpendicular to the surfaces, and stable connection of the first vibration damping part 1, the second vibration damping part 2 and the surface of the steel rail 5 is ensured.
The both ends of adjusting post 43 set up to adjustable column structure, the both ends of adjusting post 43 pass the connecting hole on two arm of force respectively, still overlap and be equipped with location structure 44 at the both ends of adjusting post 43, two location structure 44 set up the position that lies in between arm of force 411 and the lower arm of force 421 on adjusting post 43, and two location structure 44 lean on respectively on last arm of force 411 and lower arm of force 421, through adjusting the pressure of location structure 44 position control first connecting portion 41 on adjusting post 43 to first damping portion 1 and the pressure of second connecting portion 42 to second damping portion 2.
Preferably, adjustment post 43 is configured as a threaded stud with an adjustable pitch, whereby the support force exerted on first constraining layer 12 and second constraining layer 22, respectively, may be increased or decreased by adjusting the thread pitch of the stud. Both ends of the adjusting column 43 are provided with threads, both ends of the threads are respectively connected with the upper force arm 411 and the lower force arm 421, the positioning structure 44 is provided with nuts, the nuts are sleeved on the studs, the supporting force of the nuts on the upper force arm 411 and the lower force arm 421 is adjusted by rotating the nuts, and then the pre-tightening force of the shock absorber can be adjusted as required.
In the embodiment of the invention, besides the sticking and adjusting module 4, the damper also adopts a fixing device 6 for further clamping and fixing the damper, and the fixing device 6 can be a clamp with a special design or a universal design.
Preferably, the fixing device 6 comprises a base plate 61 and fixing blocks 62, the base plate 61 is positioned at the lower part of the rail 5, the fixing blocks 62 are detachably connected to the two ends of the base plate 61, the fixing blocks 62 are buckled on the upper surface of the rail foot 52, a connecting piece 63 is arranged on the upper surface of the fixing blocks 62, and the connecting piece 63 penetrates through the fixing blocks 62 and the base plate 61 of the lower part, so that the connecting strength between the lower part of the damper and the surface of the rail 5 is increased. More preferably, mounting grooves are formed in two ends of the bottom plate 61, the width of each mounting groove is slightly larger than the width of the bottom of the fixing block 62, the lower end of the fixing block 62 is inserted into the mounting grooves, and the mounting grooves are used for limiting and preventing the fixing block 62 from falling off, so that the fixing block 62 and the bottom plate 61 are connected and fixed.
As a part of the embodiments of the present invention, the present embodiment further provides an installation process of a track damping system, which specifically includes:
firstly, the surface of the steel rail 5 is subjected to rust removal treatment to be smooth, so that the adhesion effect of the first vibration damping part 1 and the second vibration damping part 2 between the steel rails is enhanced. The vibration absorber is arranged on the side surface of the steel rail 5, the first vibration absorption part 1 is attached to the rail web 51, the second vibration absorption part 2 is attached to the upper surface of the rail foot 52, the first damping layer 11 on the inner side of the first vibration absorption part 1 is attached to the rail web 51, and the second damping layer 21 on the inner side of the second vibration absorption part 2 is attached to the upper surface of the rail foot 52;
secondly, fixing the lower part of the shock absorber and the steel rail 5 by adopting a fixing device 6;
finally, adopt location structure 44 to cup joint on adjusting post 43, pass the connecting hole of last arm of force 411 with the one end of adjusting post 43, the connecting hole of arm of force 421 is passed down to the other end, the location structure 44 through rotatory upper portion increases the holding power of arm of force 411 to first damping portion 1, makes first damping portion 1 and rail waist 51 be connected closely, increases the holding power of arm of force 421 to second damping portion 2 through location structure 44 of rotatory lower part, makes second damping portion 2 and rail foot 52 upper surface connect closely.
When the pretightening force between the first vibration damping part 1 or the second vibration damping part 2 and the surface of the steel rail 5 is too large during the use process, the vibration absorption effect of the inner damping layer is weakened or the edge part of the vibration damper is warped, and the supporting force for the first vibration damping part 1 or the second vibration damping part 2 can be reduced through the reverse rotation positioning structure 44.
The track vibration damping system that this embodiment provided, including two-layer structure, the inboard damping layer that is, the outside is restraint layer, pastes traditional and on the fixed basis of rail foot anchor clamps centre gripping, adds and is equipped with adjustable pretightning force device, sets up adjustable pretightning force device through the two restraint structure outsides at rail waist side and rail foot upper surface promptly. The device can ensure that each vibration damping part is always tightly attached to the surface of the steel rail, and even under the condition that the later fatigue generation part cannot be tightly attached, the vibration dampers can be always tightly attached to the steel rail by adopting a mode of adjusting pretightening force; meanwhile, different circuit working conditions, especially curve sections, are fully considered by the structure, namely, under the adverse conditions of stronger transverse vibration of the curve sections and transverse bending conditions of the steel rails, the vibration frequency response characteristic of the steel rails can be changed by adjusting the pretightening force, so that the vibration reduction and noise reduction effects under different circuit conditions are improved.
In the track vibration damping system provided by the embodiment, the vibration damper with the adjustable pretightening force can enable resultant force applied to the first vibration damping part and the second vibration damping part to be perpendicular to the surface of each vibration damping part, so that the vertical resultant force is ensured to avoid or reduce the generation of extra damping layers and steel rails caused by external interference, meanwhile, enough supporting force can be ensured between each restraint layer and the steel rail, the vibration damper is prevented from falling off due to long-term violent movement of the steel rail, in addition, the vibration damper with the adjustable pretightening force can be combined with the vibration characteristic of the steel rail in different line working condition intervals to change the pretightening force change, thereby changing the vibration frequency response characteristic of the steel rail and absorbing or transferring the vibration of the steel rail and the radiated noise thereof.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (8)
1. A track vibration damping system comprising a rail (5) and a vibration damper, wherein the vibration damper is arranged on the outer surface of the rail (5), the vibration damper is characterized in that the vibration damper comprises a first vibration damping part (1), a second vibration damping part (2), a connecting module (3) and an adjusting module (4), the first vibration damping part (1) and the second vibration damping part (2) are connected through the connecting module (3), the connecting module (3) is a curved section, one end of the adjusting module (4) is pressed against the first vibration damping part (1), the other end of the adjusting module (4) is pressed against the second vibration damping part (2), the adjusting module (4) is used for adjusting the pre-tightening force between the first vibration damping part (1), the second vibration damping part (2) and the rail (5), the adjusting module (4) comprises a first connecting part (41) and a second connecting part (42), the first connecting part (41) is arranged on the outer side of the first vibration damping part (1), the second connecting part (42) is arranged on the outer side of the second vibration damping part (2), the adjusting module (51) and/or the adjusting module (4) is arranged on the side surface of the rail (1) through the first connecting part (43), second damping portion (2) set up rail foot (52) upper surface at rail (5), first connecting portion (41) are including arm of force (411) and first fixed part (412), second connecting portion (42) are including arm of force (421) and second fixed part (422) down, it all sets up the arc structure of one end perk with lower arm of force (421) to go up arm of force (411), the one end of adjusting post (43) with go up arm of force (411) and connect, the other end with arm of force (421) are connected down.
2. The rail damping system according to claim 1, characterized in that the first damping portion (1) and the second damping portion (2) are curved sections at the connection of the rail web (51) and the rail foot (52).
3. The track vibration damping system according to claim 1, wherein the first vibration damping part (1) and the second vibration damping part (2) each comprise at least one damping layer and at least one constraining layer, the parts of the inner sides of the first vibration damping part (1) and the second vibration damping part (2) attached to the steel rail (5) are provided as the damping layers, the outer sides of the first vibration damping part (1) and the second vibration damping part (2) are provided as the constraining layers, and the rigidity of the connecting module (3) is smaller than that of the constraining layers.
4. The track vibration damping system according to claim 1, wherein a first fixed end (413) of the upper force arm (411) is fixed to the outer side of the first vibration damping portion (1), a second fixed end (414) of the upper force arm (411) is arranged to be a tilting structure away from the first vibration damping portion (1), a third fixed end (423) of the lower force arm (421) is fixed to the outer side of the second vibration damping portion (2), a fourth fixed end (424) of the lower force arm (421) is arranged to be a tilting structure away from the second vibration damping portion (2), one end of the adjusting column (43) is connected with the second fixed end (414), and the other end of the adjusting column (43) is connected with the fourth fixed end (424).
5. The rail vibration damping system according to claim 4, characterized in that the first securing portion (412) is arranged on the side of the second securing end (414) facing the outer surface of the first vibration damping part (1), and the second securing portion (422) is arranged on the side of the fourth securing end (424) facing the second vibration damping part (2).
6. Rail vibration damping system according to claim 1 or 4, characterized in that positioning structures (44) are provided at both ends of the adjustment column (43), which positioning structures (44) are provided on the adjustment column (43) at a position between the upper force arm (411) and the lower force arm (421).
7. The track vibration damping system according to claim 1, further comprising a fixing device (6) for fixing the vibration damper, wherein the fixing device (6) comprises a base plate (61) and fixing blocks (62), the base plate (61) is located at the lower part of the rail (5), the fixing blocks (62) are arranged at both ends of the base plate (61), and the fixing blocks (62) are buckled on the upper surface of the rail foot (52) of the rail (5).
8. The track vibration damping system according to claim 1, characterized in that the connection module (3) and the first and second vibration damping parts (1, 2) are integrally formed by vulcanization, or both ends of the connection module (3) are welded to the first and second vibration damping parts (1, 2) respectively by welding.
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| CN202010315445.4A CN113529497B (en) | 2020-04-21 | 2020-04-21 | Track vibration damping system |
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| CN202010315445.4A CN113529497B (en) | 2020-04-21 | 2020-04-21 | Track vibration damping system |
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| CN113529497B true CN113529497B (en) | 2022-11-25 |
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| CN114108470A (en) * | 2021-11-01 | 2022-03-01 | 山东省公路桥梁建设集团有限公司 | Track locking device and using method thereof |
| CN114075802B (en) * | 2021-11-22 | 2024-03-22 | 深圳市长龙铁路电子工程有限公司 | Rail transit vibration damper |
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