CN208594437U - A kind of vibration and noise reducing dynamic vibration absorber structure of rail - Google Patents
A kind of vibration and noise reducing dynamic vibration absorber structure of rail Download PDFInfo
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Abstract
A kind of vibration and noise reducing dynamic vibration absorber structure of rail, is arranged in the steel rail web two sides between two adjacent fasteners, including elastic colloid and metal quality body；Elastic colloid abutting is fixed on rail, and including the first elastic colloid and the second elastic colloid that are fixed as one is laminated, and the hardness of the first elastic colloid is greater than the second elastic colloid hardness；Metal quality body is the corrugated metal plate that multi-disc is wriggled, and interval is nested in inside elastic colloid；This structure is under the premise of meeting damping material sufficient intensity, effective work area is damped using the increase of sinuous formula, improve Vibration propagation attenuation rate, and two kinds of different hardness are arranged to meet the vibration damping demand in different frequency scope in damping material, the running noises of rail traffic can be effectively reduced from noise source, and it uses the maintenance for not influencing rail traffic former base Infrastructure and track.
Description
Technical field
The utility model relates to rail traffic vibration and noise reducing field more particularly to a kind of built-in metal oscillator vibration and noise reducings
Device.
Background technique
Railway is considered as the environmentally friendly vehicles, provides the mode of transportation of clean and effective.But it is made an uproar as caused by railway operation
Sound, which has become track area along the line, cannot be neglected sound pollution source, cause to the work and life of subjective reflection no small
Puzzlement.At the same time, noise problem is also limitation one of the rail vehicle speed of service and the principal element of passenger capacity.Rail traffic
Main noise be that roughness as caused by wheel rail rolling contact, on wheel and track forms and motivates and cause Wheel Rail Vibration.
When vibration uploads sowing time in wheel and track, structure can radiated noise.In order to reduce the rolling action power between wheel track and then subtract
Small vibration, many scholars propose the measure for solving wheel surface irregularity, such as hinder using elastic wheel or using wheel
Buddhist nun's denoising device etc., but be the major radiator of noise in high-frequency range interior rail, these measure roles are simultaneously paid no attention to
Think, therefore inhibits rail vibration and to reduce rail acoustic radiation particularly important to the noise reduction of rail line.
Directly installation vibration absorber can be accomplished to be generated in vehicle travel process from being effectively reduced from sound source in orbit
Noise, the main Constraint Damping plate of current vibration and noise reducing measure and two class of dynamic vibration absorber, but still remain many deficiencies:
The rail damper that number of patent application is 200480009892.6, shortcoming have following two points: first is that resonance
Material can only inhibit the frequency in one kind or one segment limit of very little only with a kind of elastic material in use；Second is that subtracting
Vibrating device is only installed at rail lower end, does not consider the web of the rail position of entire rail, is unable to reach best effectiveness in vibration suppression.
Number of patent application is the damping-constraining vibration-damping noise-reducing board of 201621424869.X, and shortcoming has following two points:
First is that some materials that vibration-damping noise-reducing board is bonded with rail do not have damping characteristic, easily cause secondary vibration during vibration damping；
Second is that counterweight position is in the outside of vibration-damping noise-reducing board, overall structure centre-of gravity shift, easily generating device is loosely very during vibration damping
To obscission.In addition, existing steel rail vibration damping device installing and using in whole route, does not consider straightway and curved section
Different road conditions, single vibration absorber design can not accomplish on sliver road can preferable vibration and noise reducing effect.
Steel rail dynamic absorber is one of the effective ways that vibration noise is reduced from source, at this stage rail noise control
Measure is difficult to be effectively reduced rail vibration and noise radiation.Therefore a kind of more efficient steel rail vibration absorber is needed, makes steel
The effect of vibration and noise reduction of rail is more efficient.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of vibration and noise reducing dynamic vibration absorber structure of rail,
Above-mentioned deficiency can be overcome, vibration and the radiated noise for increasing damping work area, more efficiently reducing rail.
The utility model is achieved through the following technical solutions:
A kind of vibration and noise reducing dynamic vibration absorber structure of rail, it is characterised in that:
The built-in metal oscillator vibration and noise reducing dynamic vibration absorber structure is arranged in the rail between two adjacent fasteners
Web of the rail two sides, including elastic colloid and metal quality body；
Elastic colloid abutting is fixed on rail, including the first elastic colloid and the second bullet that are fixed as one is laminated
Property damping body, and the hardness of the first elastic colloid be greater than the second elastic colloid hardness；
The built-in metal oscillator vibration and noise reducing dynamic vibration absorber structure includes two different arrangement forms:
At rail straight line section, elastic colloid upper end is close to rail head bottom, the web of the rail is close on the inside of middle section, and rail is close in lower end
Waist rail bottom transition corner is towards bending on the outside of rail bottom, substantially in vertical L shape balanced configuration in rail two sides, also, level side
Upwards, elastic colloid upper end exposed face is no more than rail head outer rim, and lower end surface is no more than rail bottom outer rim；First elastic colloid
It is L shape with the second elastic colloid, the first elastic colloid is located on the inside of the second elastic colloid；Multiple layer metal mass body
It is first longitudinal from top to bottom in elastic damping body to wriggle repeatedly laterally along the L shape bending of elastic colloid again, by elastic damping
Body is divided into multilayer from the inside to the outside, formed elastomeric damping layer and metal quality layer main body in the horizontal direction replace overlaying structure；
It at rail curved section, is not contacted at the top of elastic colloid with rail head bottom, the web of the rail is close on the inside of middle section, bottom is tight
It pastes at the top of rail bottom, substantially configures in vertical rectangular symmetrical in rail two sides, also, in horizontal direction, elastic colloid exposed face
Between rail head outer rim and rail bottom outer rim；First elastic colloid and the second elastic colloid are substantially in vertical rectangle, the
One elastic colloid is located on the downside of the second elastic colloid；Multiple layer metal mass body laterally wriggles in elastic damping body, and every layer
Metal quality body is in " S " type toppled over, elastic colloid is from top to bottom divided into multilayer, forms elastomeric damping layer and metal quality
The alternating overlaying structure of layer along the vertical direction.
This dynamic vibration absorber structure is embedded in inside elastic colloid using sinuous formula metal quality body as oscillator, makes oscillator
It is wrapped up by elastic damping material on surface.The apparent advantage of this structure has the following: first is that sinuous metal quality body is not only
Metal weight can be increased in the elastic damping body of identical size, and also add contact table of the damping block with metallic object
Area improves the attenuation rate of Vibration propagation, and then increases the consumption of rail vibration energy, more efficiently reduces rail
Vibration.Second is that in the design of dynamic vibration absorber, what is directly contacted with Rail Surface profile is elastic damping material, rail
Vibration is transferred in elastic damping material, and the shock between metal material will not be caused during rail vibration is propagated, into
Without will cause secondary acoustic radiation.Third is that metal quality body is completely embedded in inside elastic damping material as oscillator, in vibration damping
In the process, oscillator is transferred in damping material regardless of the vibration in which direction, and vibrational energy is consumed by damping material to be absorbed,
It equally avoids and causes two infrasonic radiations.Fourth is that embedded design, is distributed the uniform quality of bump leveller entirety, in vibration damping process
In be not in device centre-of gravity shift phenomenon, improve safety in utilization.Fifth is that steel rail dynamic absorber structure is simple, user
Just, with strong applicability.
In view of no matter which kind of rail, the web of the rail position vibration it is most strong, acoustic radiation is more serious, thus guarantee web section
Covering is primary selection, thus no matter which kind of rail, should all make the elastic colloid covering web of the rail and rail bottom as far as possible, so as to
It is enough preferably to obstruct and sponge rail partial radiation noise.
Furthermore, it is contemplated that active force when vehicle is run between wheel track is based on vertical force, and steel at rail straight line section
At rail curved section, between wheel track while generating vertical force, biggish horizontal force can be also generated.Therefore, for rail
Straightway, in addition to being close to the web of the rail, elastic colloid also keeps the abutting contact with rail head bottom, at the top of rail bottom, with as far as possible
Vibration on absorption rail is vertical, due to rail head limited width, as long as elastic colloid guarantee comes into full contact with rail head, so
Its width is substantially suitable with rail head width, and elastic colloid downward bending is to sufficiently cover rail bottom, and rail bottom is also to make an uproar
Acoustic radiation region, in addition its metal quality body is also mainly the serpentine configuration of vertical direction, so as in vertical upper increase
Attenuation rate is vibrated, rail vibration is reduced.For rail curved section, elastic colloid is wider than the elastic colloid of straightway, this
It is because (i.e. elastic colloid exposed face is located in rail bottom outer rim in the case where not influencing the normal maintenance of rail
Side), elastic colloid in the horizontal direction should wide as far as possible (i.e. elastic colloid exposed face is located on the outside of rail head outer rim),
In addition metal quality body is the serpentine structure of horizontal direction, so as to increase the vibration attenuation rate in horizontal direction, and then subtract
Small vibration.
The effect of postscript, the different Double-layer elastic damping body of hardness is, due to being located at the of inside at straightway rail
One elastic colloid hardness is greater than the second elastic colloid hardness in outside, and the first elasticity resistance of downside is located at curved section rail
Buddhist nun's body hardness is greater than the second elastic colloid hardness of upside, according to resonant frequency omega in following formula and elastomeric damping layer etc.
Imitating steel rail vibration absorber known to the equivalent mass m relationship of rigidity k and quality layers has two or more resonance frequencies:
Optimal people having the same aspiration and interest formula:
Optimal damper formula:
In formula: μ is bump leveller and principal oscillation mass of system ratio, ωnFor bump leveller intrinsic frequency, ΩnIt is solid for main vibrational system
There is frequency.
And then it derives:
In formula: k is bump leveller rigidity, and c is bump leveller damping, and m is absorber mass, and M is main vibrational system quality.
As shown from the above formula, the first elasticity resistance for being located at downside inside and curved section rail is located at straightway rail
The metal quality layer resonance frequency of Buddhist nun's body is higher, for absorbing the vibration of rail, and generates low-frequency vibration simultaneously；And straightway steel
The metal quality layer resonance frequency for being located at the second elastic colloid at outside and curved section rail positioned at upside at rail is lower, uses
It is located at the metal for being located at the first elastic colloid of downside inside and curved section rail at further absorption straightway rail
The secondary low-frequency vibration that quality layers generate.Since low-frequency vibration and noise are not linearly related, and at rail straight line section
The inner metal quality layers of dynamic vibration absorber and at rail curved section on the downside of the vibration decaying of metal quality layer it is big, therefore steel
Metal quality layer on the upside of at the outboard mass layer and rail curved section of dynamic vibration absorber at rail straightway causes quadratic noise
Contribution amount very little.So the utility model can largely reduce rail vibration, without causing new noise radiation, finally
Realize the purpose for reducing rail vibration and noise.
Further, it is contemplated that steel rail vibration absorber is the one section one section rail two sides being arranged between two adjacent fasteners,
So length is about 20cm-25cm or so, therefore is stayed in advance on the first elastic colloid and the second elastic colloid and set aperture, opened
Hole sectional area is slightly less than metal quality body section product, to guarantee that metal mass body and elastic colloid fit closely, the first elasticity
After damping body and the second elastic colloid sulfidization molding are fixed as one, metal quality body is opened from the insertion of the end of elastic colloid
It is easy for installation in hole, it is conducive to processing.
Further, the thickness of first elastic colloid and the second elastic colloid is suitable, the boundary position of the two
At the middle layer of multiple layer metal mass body, i.e. the first elastic colloid and the second elastic colloid respectively account for entire elastic colloid
Half, to guarantee the shock attenuation result of high-frequency vibration and low-frequency vibration simultaneously.
Further, the elastic colloid can be bonded by adhesive specially or clamp is bonded rail and consolidates
It is fixed, to ensure that steel rail vibration absorber can normally play a role.
Further, at rail straight line section, 2~4 layers of metal quality body are first longitudinal from top to bottom in elastic damping body
It wriggles repeatedly laterally along the L shape bending of elastic colloid again, elastic colloid is divided into 3~5 layers from the inside to the outside；In steel rail bending
At line segment, 4~6 layers of metal quality body laterally wriggle in elastic damping body, every layer of metal quality body be in " S " type toppled over, general
Elastic colloid is from top to bottom divided into 5~7 layers.Under the premise of guaranteeing elastic colloid integral structure integrality, by the greatest extent
The elastic colloid of amount multilayer ensures effectiveness in vibration suppression.
Further, the average thickness of the elastomeric damping layer is greater than the average thickness of metal quality layer；In rail straight line
At section, if the average thickness of elastomeric damping layer is d, the average thickness of metal quality layer is 0.2d, at rail curved section, if bullet
Property damping layer average thickness be d, the average thickness of metal quality layer is 0.3d.This is because metal quality layer volume is bigger,
The volume of elastomeric damping layer is smaller, and consumption energy is more, and effectiveness in vibration suppression is better, if but metal quality thickness degree is too big
, the integral structure of elastomeric damping layer can be destroyed, so the two needs to keep a kind of equilibrium relation again, metal quality layer is average
The selection of the ratio of thickness and elastomeric damping layer average thickness, advantageously ensures that effectiveness in vibration suppression.It is selected under the premise of this, then as far as possible
Metal should select the biggish material of density to be conducive to vibration damping to meet quality requirement as far as possible.
Further, at rail straight line section, the sinuous direction of the multiple layer metal mass body is identical, also, works as metal
When mass body wriggles towards rail, the sinuous angle of multiple layer metal mass body becomes larger from inside to outside, when metal quality body is remote
When wriggling from rail, the sinuous angle of multiple layer metal mass body gradually becomes smaller from inside to outside.Metallic can further be increased
Measure the contact surface area of body and elastomeric damping layer.
Further, at rail curved section, the sinuous direction of the multiple layer metal mass body is identical, is parallel to each other, and
And metal quality body, when wriggling towards rail head or rail bottom, radian is continuous and identical, further increase metal quality body with
Under the premise of the contact surface area of elastomeric damping layer, the continuity of metal quality body bending arc angle repeatedly is also convenient in processing
Its consistency is accurately controlled, processing is facilitated.
Further, the hardness of first elastic colloid is 1.5 to 2 times of the hardness of the second elastic colloid, and
It is integrated by the compacting of sulfidization molding technology, to ensure efficient absorption rail vibration and absorb because absorbing rail vibration
The secondary vibration of generation.
Further, it is contemplated that when metal quality volume density is larger, it is ensured that meet quality inside limited volume
It is required that and in a certain range, quality is bigger, and rigidity is bigger, is conducive to vibration damping.Elastomer damping is also similar, in certain model
In enclosing, damping is bigger, and effectiveness in vibration suppression is better.So metal quality body is carbon steel mass body, alloy mass body or not
Become rusty steel quality body, can be according to actual service conditions and the specific material of environmental selection；Lesser second elastic colloid of hardness can be with
It is natural rubber elastomeric damping layer, general purpose rubber elastomeric damping layer or silicon rubber elastic damping layer etc., it is easily processed into type；Hardness
EP rubbers elastomeric damping layer, neoprene elastomeric damping layer or polyurethane rubber bullet may be selected in biggish first elastic colloid
Property damping layer etc., there is preferable fatigue behaviour and damping property.
The utility model has the beneficial effects that:
1, start with from rail vibration root, the Vibration Condition different from curved section rail devises difference at straightway
The bump leveller structure of structure, the design at straight line can effectively reduce the vertical vibration of rail, and the design at curve can effectively reduce
Oscillation crosswise.
2, different sinuous formula internal structures is designed at the more serious web of the rail position of acoustic radiation, increases elastomeric damping layer
The effective work area for bearing shearing force, improves the attenuation rate of Vibration propagation, rail vibration is effectively reduced.
3, elastic colloid is wrapped up on the surface of each layer of metal quality body, and the vibration in metal quality body all directions is equal
It can be transferred on elastic damping material, and steel rail vibration absorber is also elastic damping material with the position that rail directly contacts,
Damping material can consume rapidly the rail vibration energy that transfer comes, without generating new noise radiation.
4, by being different hardness by elastic colloid hierarchical design, it is made to generate difference under the vibrational excitation of rail
The vibration of resonance frequency.
5, the running noises of rail traffic can be effectively reduced from noise source, and it is former using rail traffic is not influenced
The maintenance of infrastructure and track.
Detailed description of the invention
Fig. 1 is the fit structure stereoscopic schematic diagram of rail at this bump leveller structure and straightway
Fig. 2 faces cut-away view for Fig. 1's
Fig. 3 faces cut-away view for bump leveller structure single in Fig. 2
Fig. 4 is the fit structure stereoscopic schematic diagram of rail at this bump leveller structure and curved section
Fig. 5 faces cut-away view for Fig. 4's
Fig. 6 faces cut-away view for bump leveller structure single in Fig. 5
In Fig. 1~6: 1 is rail head, and 2 be the web of the rail, and 3 be rail bottom, and 4 be inclusion enclave protective layer, and 5 be elastic colloid, and 501 are
First elastic colloid, 502 be the second elastic colloid, and 6 be metal quality body.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing.
The vibration and noise reducing dynamic vibration absorber structure of rail as Figure 1 and Figure 4 is arranged in the steel between two adjacent fasteners
2 two sides of the web of the rail of rail, including elastic colloid 5 and metal quality body 6.
Metal quality body 6 is the corrugated metal plate that multi-disc is wriggled, and interval is nested in inside elastic colloid 5, is selected close
Biggish metal material is spent, as steel rail vibration absorber oscillator, under the premise of meeting 5 sufficient intensity of elastic colloid, using wriggling
The increase of Yan curved surface damps effective work area, improves Vibration propagation attenuation rate.
Elastic colloid 5, which is suitably chosen, damps biggish material, and abutting is fixed on rail, for absorbing consumption rail
Vibrational energy, including be fixed as one the first elastic colloid 501 and the second elastic colloid 502 is laminated, and the first elasticity
The hardness of damping body 501 is 1.5 to 2 times of the hardness of the second elastic colloid 502.
The structure includes two different arrangement forms:
In embodiment as shown in Figure 1, at rail straight line section, 1 bottom of rail head is close in 5 upper end of elastic colloid, in middle section
The web of the rail 2 is close in side, and lower end is close to 2 rail bottom of the web of the rail, 3 transition corner towards 3 outside bending of rail bottom, is substantially symmetrically matched in vertical L shape
It sets in rail two sides, also, in horizontal direction, 5 upper end exposed face of elastic colloid is no more than 1 outer rim of rail head, and lower end surface is not
More than 3 outer rim of rail bottom；First elastic colloid 501 and the second elastic colloid 502 are L shape, the first elastic colloid 501
Positioned at 502 inside of the second elastic colloid；3 layers of metal quality body 6 in elastic colloid 5 from top to bottom it is first longitudinal again laterally along
The L shape bending of elastic colloid 5 is wriggled repeatedly, and elastic colloid 5 is divided into 4 layers from the inside to the outside, formed elastomeric damping layer with
The alternating overlaying structure of metal quality layer main body in the horizontal direction, also, the average thickness of elastomeric damping layer is greater than metal quality
The average thickness of layer, if the average thickness of elastomeric damping layer is d, the average thickness of metal quality layer is 0.2d.
In embodiment as shown in Figure 3, at rail curved section, 5 top of elastic colloid is not contacted with 1 bottom of rail head, in
It is close to the web of the rail 2 on the inside of section, bottom is close to 3 top of rail bottom, is substantially configured in vertical rectangular symmetrical in rail two sides, also, horizontal
On direction, 5 exposed face of elastic colloid is located between 3 outer rim of 1 outer rim of rail head and rail bottom；First elastic colloid 501 and second
Elastic colloid 502 is substantially in vertical rectangle, and the first elastic colloid 501 is located at 502 downside of the second elastic colloid；5 layers
Metal quality body 6 laterally wriggles in elastic colloid 5, and every layer of metal quality body 6 is in " S " type toppled over, by elastic colloid 5
From top to bottom be divided into 6 layers, formed elastomeric damping layer and metal quality layer along the vertical direction replace overlaying structure, also, it is elastic
The average thickness of damping layer is greater than the average thickness of metal quality layer, if the average thickness of elastomeric damping layer is d, metal quality layer
Average thickness be 0.3d.
As shown in Fig. 3, Fig. 6, the 502 thickness phase of the first elastic colloid 501 and the second elastic colloid of elastic colloid 5
When the boundary of the two is located at the middle layer of multiple layer metal mass body 6.
Inclusion enclave protective layer 4 can also be covered as far as possible by fitting closely the exposed facial contour of elastic colloid 5, such as in rail
At straightway, inclusion enclave protective layer 4 is in the bending of falling serpentine, and at rail curved section, inclusion enclave protective layer 4 is rolled in inverted "L" shape
It is curved, while playing a protective role to elastic colloid 5, additionally it is possible to reduce and vibrate and reduce noise radiation；Inclusion enclave protection
There are gap between 4 both ends of layer and rail, upper end is located at 1 lower section of rail head, and lower end is located at 3 top of rail bottom, does not contact with rail, this
Sample would not generate extraneous vibration and noise during vibration damping；In addition, in order not to interfere the normal maintenance of rail, it is horizontal
On direction, 4 outer rim of inclusion enclave protective layer is located on the inside of 3 outer rim of rail bottom.
When specific design, portion size when dynamic vibration absorber can be installed according to rail, rationally design bump leveller
Size.
Fig. 2 is to install the sectional dimension figure to rail, the web of the rail 2 of rail for the dynamic vibration absorber at rail straight line section
Most narrow place's width D 2 is about 16.5mm, and 1 height H1 of rail head is about 48.5mm, and the half d1 of 1 width of rail head is about 36.5mm,
The half d3 of 3 width of rail bottom is about 75mm.The elastic colloid 5 of dynamic vibration absorber is L-shaped, and vertical section height H5 is
70mm, transverse fold section L5 length are 30mm, and thickness D5 is about 28.5mm, and each layer of elastomeric damping layer average thickness is about
8mm, each layer of metal quality layer average thickness is about 1.6mm.
Dynamic vibration absorber as shown in Figure 3, at rail straight line section, the sinuous formula metal quality body 6 of 3 layers of waveform wriggles
Direction is identical, is generally parallel to each other, also, along arrows direction, when metal quality body 6 wriggles towards rail, 3 layers of gold
The sinuous angle for belonging to mass body 6 becomes larger from inside to outside, and the angle of each corner is 100 ° ± 5 ° from inside to outside, 125 ° ±
5 ° and 150 ° ± 5, when metal quality body 6 wriggles far from rail, the sinuous angle of 3 layers of metal quality body 6 is from inside to outside gradually
Become smaller, the angle of each corner is 150 ° ± 5,100 ° ± 5 ° and 125 ° ± 5 ° from inside to outside.
Fig. 5 is to install the sectional dimension figure to rail for the dynamic vibration absorber at rail curved section, rail size with
Size is consistent in above-mentioned Fig. 2, and elastic colloid 5 is substantially in the rectangle erect, and thickness D5 is about 38mm, and height H5 is about
105mm, each layer of elastomeric damping layer average thickness L5 is about 14mm, and each layer of metal quality layer average thickness is about 4.2mm.
Dynamic vibration absorber as shown in FIG. 6, at rail curved section, the sinuous formula metal quality body 6 of 5 layers of waveform wriggles
Direction is identical, and when metal quality body 6 wriggles towards rail head 1 or rail bottom 3, radian is continuous and identical, corner is 85 °.
Metal quality body 6 and elastic colloid 5 can be according to actual service conditions and the specific material of environmental selection, metal qualities
Body 6 can use carbon steel mass body, alloy mass body, stainless steel mass body etc.；Lesser second elastic colloid 502 of hardness is excellent
It is selected as natural rubber elastomeric damping layer, general purpose rubber elastomeric damping layer or silicon rubber elastic damping layer etc., the elasticity of these materials
Damping layer is easily processed into type；Biggish first elastic colloid 501 of hardness is preferably EP rubbers elastomeric damping layer, neoprene rubber
Glue elasticity damping layer or polyurethane rubber elastomeric damping layer etc., the elastomeric damping layers of these materials have preferable fatigue behaviour and
Damping property.
In process, it is stayed in advance on the first elastic colloid 501 and the second elastic colloid 502 and sets aperture, aperture
Sectional area is slightly less than metal quality body section product, to guarantee that metal mass body 6 is fitted closely with elastic colloid 5, the first elasticity
After damping body 501 and 502 sulfidization molding of the second elastic colloid are fixed as one, metal quality body 6 made of being suppressed as steel plate
From the end of elastic colloid 5 insertion aperture in, formed steel rail vibration absorber overall structure, using adhesive specially by bump leveller with
Rail Surface fits closely, along the stainless steel materials of its contour line distribution in the aerial elastic colloid surface covering of exposure
Inclusion enclave protective layer 4, is finally fixed on rail using fixture, and steel rail vibration absorber is made correctly to play its effect.
Since the first elastic colloid 501 is different with 502 hardness of the second elastic colloid, has different damping, according to public affairs
Formula resonant frequency omega and elastic damping survey dynamic absorber utensil known to the equivalent stiffness k of layer and the equivalent mass m relationship of quality layers
There are two or the above resonance frequency, to meet the vibration damping demand in different frequency scope: at straightway on the inside of rail and curve
Higher frequency reduces rail vibration on the downside of rail at section, and Frequency reduces on the upside of straightway section rail outside and curved section rail
The secondary vibration generated on the downside of rail on the inside of rail and at curved section at the straightway.
Since low-frequency vibration and noise are not linearly related, and for quality layers on the inside of the dynamic vibration absorber at straightway and
Top quality layers vibration decaying is big at curved section, therefore steel at rail inner metal mass body 6 and curved section at straightway
Rail upper metal mass body 6 causes quadratic noise contribution amount very little.So the utility model can largely reduce rail vibration
It is dynamic, it is final to realize the purpose for reducing rail vibration and noise without causing new noise radiation.
Multistage tuned frequency in dynamic vibration absorber is determined by the main mode of oscillation of rail, to determine steel rail vibration absorber
In metal quality body and elastic colloid design parameter.
Claims (10)
1. a kind of vibration and noise reducing dynamic vibration absorber structure of rail, it is characterised in that:
The vibration and noise reducing dynamic vibration absorber structure is arranged in the web of the rail (2) two sides of the rail between two adjacent fasteners, including
Elastic colloid (5) and metal quality body (6)；
Elastic colloid (5) abutting is fixed on rail, including the first elastic colloid (501) for being fixed as one and the is laminated
Two elastic colloids (502), and the hardness of the first elastic colloid (501) is greater than the second elastic colloid (502) hardness；
Metal quality body (6) is the corrugated metal plate that multi-disc is wriggled, and it is internal that interval is nested in elastic colloid (5)；
The vibration and noise reducing dynamic vibration absorber structure includes two different arrangement forms:
At rail straight line section, elastic colloid (5) upper end is close to rail head (1) bottom, be close to the web of the rail (2) on the inside of middle section, lower end
It is close to the transition corner between the web of the rail (2) and rail bottom (3) towards bending on the outside of rail bottom (3), is substantially in vertical L shape balanced configuration
In rail two sides, also, in horizontal direction, elastic colloid (5) upper end exposed face is no more than rail head (1) outer rim, lower end surface
No more than rail bottom (3) outer rim；First elastic colloid (501) and the second elastic colloid (502) are L shape, the first elasticity
Damping body (501) is located on the inside of the second elastic colloid (502)；Multiple layer metal mass body (6) is in elastic colloid (5) by upper
It wriggles repeatedly to lower first longitudinal L shape bending again laterally along elastic colloid (5), elastic colloid (5) is divided from the inside to the outside
For multilayer, formed elastomeric damping layer and metal quality layer main body in the horizontal direction replace overlaying structure；
It at rail curved section, is not contacted at the top of elastic colloid (5) with rail head (1) bottom, is close to the web of the rail (2) on the inside of middle section,
Bottom is close at the top of rail bottom (3), substantially configures in vertical rectangular symmetrical in rail two sides, also, in horizontal direction, elastic damping
Body (5) exposed face is located between rail head (1) outer rim and rail bottom (3) outer rim；First elastic colloid (501) and the second elastic damping
Body (502) is substantially in vertical rectangle, and the first elastic colloid (501) is located on the downside of the second elastic colloid (502)；Multilayer gold
Belong to mass body (6) laterally to wriggle in elastic colloid (5), every layer of metal quality body (6) is hindered in " S " type toppled over, by elasticity
Buddhist nun's body (5) is from top to bottom divided into multilayer, formed elastomeric damping layer and metal quality layer along the vertical direction replace overlaying structure.
2. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: first elasticity
It is stayed in advance on damping body (501) and the second elastic colloid (502) and sets aperture, aperture sectional area is less than metal quality body section
After product, the first elastic colloid (501) and the second elastic colloid (502) sulfidization molding are fixed as one, metal quality body (6)
Out of the end of elastic colloid (5) insertion aperture.
3. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: first elasticity
The thickness of damping body (501) and the second elastic colloid (502) is suitable, and the boundary of the two is located at multiple layer metal mass body (6)
Middle layer at.
4. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: the elastic damping
Body (5) is bonded by adhesive specially or clamp is bonded rail and fixes.
5. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: in rail straight line section
Place, 2~4 layers of metal quality body (6) are first longitudinal again laterally along elastic colloid (5) from top to bottom in elastic colloid (5)
L shape bending is wriggled repeatedly, and elastic colloid (5) is divided into 3~5 layers from the inside to the outside；At rail curved section, 4~6 layers of metal
Mass body (6) laterally wriggles in elastic colloid (5), and every layer of metal quality body (6) is in " S " type toppled over, by elastic damping
Body (5) is from top to bottom divided into 5~7 layers.
6. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: the elastic damping
The average thickness of layer is greater than the average thickness of metal quality layer；At rail straight line section, if the average thickness of elastomeric damping layer is
The average thickness of d, metal quality layer are 0.2d, at rail curved section, if the average thickness of elastomeric damping layer is d, metallic
The average thickness for measuring layer is 0.3d.
7. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: in rail straight line section
Place, the sinuous direction of the multiple layer metal mass body (6) is identical, is parallel to each other, also, works as metal quality body (6) towards rail
When wriggling, the sinuous angle of multiple layer metal mass body (6) becomes larger from inside to outside, when metal quality body (6) wriggle far from rail
When Yan, the sinuous angle of multiple layer metal mass body (6) gradually becomes smaller from inside to outside.
8. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: in rail curved section
Place, the sinuous direction of the multiple layer metal mass body (6) is identical, and metal quality body (6) is towards rail head (1) or rail bottom
(3) when wriggling, radian is continuous and identical.
9. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: first elasticity
The hardness of damping body (501) is 1.5 to 2 times of the hardness of the second elastic colloid (502).
10. the vibration and noise reducing dynamic vibration absorber structure of rail according to claim 1, it is characterised in that: the metallic
Measuring body (6) is carbon steel mass body, alloy mass body or stainless steel mass body；Second elastic colloid (502) layer is natural rubber
Glue elasticity damping layer, general purpose rubber elastomeric damping layer or silicon rubber elastic damping layer, the first elastic colloid (501) are the third rubber of second
Glue elasticity damping layer, neoprene elastomeric damping layer or polyurethane rubber elastomeric damping layer.
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| CN109930434A (en) * | 2019-04-08 | 2019-06-25 | 西南交通大学 | A kind of mass block arch clamping device for track vibration-reducing |
| CN109930433A (en) * | 2019-04-08 | 2019-06-25 | 西南交通大学 | A kind of mass block vibration absorber for track two sides |
| CN110230657A (en) * | 2019-07-15 | 2019-09-13 | 苏州英磁新能源科技有限公司 | A kind of more damping layer locally resonant subelements and its application method |
| CN110747701A (en) * | 2019-10-12 | 2020-02-04 | 隆昌瑞博轨道科技有限公司 | Damping sheath system for steel rail |
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| CN109930434A (en) * | 2019-04-08 | 2019-06-25 | 西南交通大学 | A kind of mass block arch clamping device for track vibration-reducing |
| CN109930433A (en) * | 2019-04-08 | 2019-06-25 | 西南交通大学 | A kind of mass block vibration absorber for track two sides |
| CN109930434B (en) * | 2019-04-08 | 2020-11-10 | 西南交通大学 | Mass block arch-shaped clamping device for vibration reduction of track |
| CN110230657A (en) * | 2019-07-15 | 2019-09-13 | 苏州英磁新能源科技有限公司 | A kind of more damping layer locally resonant subelements and its application method |
| CN110230657B (en) * | 2019-07-15 | 2024-06-04 | 苏州英磁新能源科技有限公司 | Multi-damping layer local resonance subunit and application method thereof |
| CN110747701A (en) * | 2019-10-12 | 2020-02-04 | 隆昌瑞博轨道科技有限公司 | Damping sheath system for steel rail |
| CN110747701B (en) * | 2019-10-12 | 2021-03-19 | 隆昌瑞博轨道科技有限公司 | Damping sheath system for steel rail |
| CN111535082A (en) * | 2020-05-09 | 2020-08-14 | 上海工程技术大学 | Multidirectional hydraulic vibration reduction dynamic vibration absorber structure of steel rail |
| CN111535082B (en) * | 2020-05-09 | 2021-08-10 | 上海工程技术大学 | Multidirectional hydraulic vibration reduction dynamic vibration absorber structure of steel rail |
| CN111749056A (en) * | 2020-06-18 | 2020-10-09 | 中铁工程设计咨询集团有限公司 | Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail |
| CN113089389A (en) * | 2021-04-28 | 2021-07-09 | 广州希声轨道科技有限公司 | Steel rail vibration absorber device |
| CN113338088A (en) * | 2021-05-20 | 2021-09-03 | 上海工程技术大学 | Staggered broadband noise reduction steel rail |
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