CN111749056A - Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail - Google Patents
Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail Download PDFInfo
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- CN111749056A CN111749056A CN202010558752.5A CN202010558752A CN111749056A CN 111749056 A CN111749056 A CN 111749056A CN 202010558752 A CN202010558752 A CN 202010558752A CN 111749056 A CN111749056 A CN 111749056A
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- steel rail
- rail
- damping
- counterweight
- vibration
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F7/00—Vibration-dampers; Shock-absorbers
- F16F7/10—Vibration-dampers; Shock-absorbers using inertia effect
- F16F7/104—Vibration-dampers; Shock-absorbers using inertia effect the inertia member being resiliently mounted
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention is suitable for the technical field of vibration and noise reduction of rail transit, and provides a mass distributed steel rail comprehensive damping vibration and noise reduction device which is applied to a steel rail, is arranged on a steel rail web and a steel rail bottom, and comprises a counterweight vibrator, a damping layer and a protection frame. The protection frame wrapping the outer surfaces of the rail web and the rail bottom of the steel rail, the damping layer accommodated in the protection frame and the plurality of counterweight vibrators distributed in the damping layer are arranged, so that when the counterweight vibrators vibrate along with the steel rail, a plurality of mass-spring systems distributed are formed, and the vibration energy of the steel rail is consumed by means of the reciprocating vibration of the counterweight vibrators at a balance position; meanwhile, relative motion between adjacent counterweight vibrators causes extrusion and shear deformation of the middle elastic damping material, and vibration energy transmitted by the steel rail can be further consumed. The invention can also realize the synchronous control of the vibration noise of different frequency bands, and can avoid the problems of falling, side turning and the like caused by the concentration of the heavy-mass balancing weight on the side wing of the steel rail.
Description
Technical Field
The invention belongs to the technical field of vibration and noise reduction of rail transit, and particularly relates to a mass distribution type comprehensive steel rail damping vibration and noise reduction device.
Background
The rail transit is a traffic mode taking a wheel-rail system as a traveling base. Under huge train load effect and the unsmooth excitation effect in wheel rail surface, the wheel rail system of high rigidity low damping can produce huge vibration noise, seriously influences passenger's travelling comfort in the car and the peripheral resident's of circuit normal work and rest, still can produce bad influence to the use of precision instruments and the safety of ancient building under the special circumstances, has greatly restricted track traffic's development.
The additional damping structure added on the non-working surface of the steel rail, such as a damping steel rail or a steel rail dynamic vibration absorber, is an effective measure for controlling the vibration noise of the wheel rail at the source, has economic price and convenient installation, and is suitable for the vibration and noise reduction control of large-scale foundation buildings such as subways. At present, damping steel rails and dynamic vibration absorbers are applied to vibration and noise reduction of rail transit at home and abroad to a certain extent, but the analysis of the working principle shows that the current steel rail damping vibration and noise reduction products have the following defects:
(1) the damping steel rail has obvious attenuation effect on high-frequency vibration noise in the middle, but has poor control on low-frequency vibration. In addition, in order to improve the shear effect of the damping layer, the traditional constrained damping steel rail usually adopts a constrained layer with a complex structure, an expanded connecting layer and the like, and the manufacturing process is complicated.
(2) The dynamic vibration absorber can realize good control of vibration noise in any specific frequency band range, but the vibration reduction and noise reduction frequency band range is narrow, and the design parameter deviation control is strict.
(3) At present, although some products carry out damping rail and dynamic vibration absorber directly, install simultaneously and use at rail non-working face after simple combination, but because rail non-working face area is limited, after reserving the installation space for restraint damping plate, the installation space of reserving for the dynamic vibration absorber becomes narrow and limited, concentrate the edge of centre gripping at the rail bottom flange with big quality dynamic vibration absorbing quality piece, the partial outside of overall structure barycenter is probably because the uneven power of each direction withhold force of clamping part leads to the dynamic vibration absorbing quality piece to turn over and drop, bring very big hidden danger for train operation safety.
Disclosure of Invention
The invention provides a mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device, and aims to solve the problems in the prior art.
The invention is realized in this way, the comprehensive damping vibration attenuation noise reduction device of the distributed quality rail, it applies to rail, the said rail has working face located at top, rail foot located at bottom and rail web connecting said working face and said rail foot, including counterweight oscillator, damping layer and protective frame;
the outer surfaces of the rail web and the rail bottom of the steel rail are wrapped by the protection frame, the damping layer is contained in the protection frame, and a plurality of counterweight vibrators are distributed in the damping layer.
Preferably, the protective frame is provided with an inner frame contacting the steel rail and an outer frame wrapping the outer side of the damping layer;
the inner wall of the outer frame is provided with a plurality of reinforcing ribs connected with the inner frame.
Preferably, the outer surface of the protective frame is wrapped with a clamp.
Preferably, the section of the counterweight vibrator is of a honeycomb hexagonal structure, and the counterweight vibrator is in a strip shape or a granular shape along the longitudinal direction of the steel rail.
Preferably, the damping layer is made of polyurethane or other materials with high damping performance.
Preferably, the material of the counterweight vibrator is a high-density nonmetal or metal, such as one or more of silicon dioxide, mica, ceramic, steel, lead and tungsten.
Preferably, the thickness of the inner frame is 1-2 mm, and the thickness of the outer frame is 2-4 mm.
Preferably, the protective frame is made of metal having a high elastic modulus.
Compared with the prior art, the invention has the beneficial effects that:
the mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device comprises a protective frame, a damping layer and a plurality of counterweight vibrators, wherein the protective frame wraps the outer surfaces of the rail web and the rail bottom of a steel rail; meanwhile, relative motion between adjacent counterweight vibrators causes extrusion and shear deformation of the middle elastic damping material, and vibration energy transmitted by the steel rail can be further consumed.
The synchronous control of the vibration noise with different frequencies can be realized by arranging the counterweight vibrators and the damping layers made of different materials in the areas of the rail web and the rail bottom.
The counterweight vibrators are distributed in the elastic damping layer, so that the problems of falling, rollover and the like caused by the fact that the large-mass counterweight blocks are concentrated on the steel rail side wings can be avoided.
Drawings
FIG. 1 is a schematic view of the overall structure of the mass distribution type steel rail comprehensive damping vibration-damping noise-reducing device of the present invention.
Fig. 2 is a cross-sectional view of the clip of fig. 1.
FIG. 3 is a cross-sectional view of the rail of FIG. 1
In the figure: the vibration damper comprises a steel rail 1, a counterweight vibrator 2, a damping layer 3, a protective frame 4 and a clamp 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 and fig. 3, the present invention provides a technical solution: a mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device is applied to a steel rail 1, the steel rail 1 is provided with a working surface located at the top, a rail bottom located at the bottom and a rail web connecting the working surface and the rail bottom, and the noise reduction device comprises a counterweight vibrator 2, a damping layer 3, a protection frame 4 and a clamp 5.
The outer surfaces of the web and the rail bottom of the steel rail 1 are wrapped by the protective frame 4. The protective frame 4 has an inner frame contacting the steel rail 1 and an outer frame wrapping the outer side of the damping layer 3. The inner wall of the outer frame has a plurality of ribs 41 that connect to the inner frame. The thickness of inner frame is 1~2mm, and the thickness of frame is 2~4 mm. The protective frame 4 is made of metal with high elastic modulus such as steel or aluminum.
The damping layer 3 is accommodated in the protection frame 4, and a plurality of counterweight vibrators 2 are distributed in the damping layer 3. The damping layer 3 is made of high-damping polyurethane materials, is injected between the counterweight vibrator 2 and the protection frame 4 through a vulcanization process, and is integrated with the counterweight vibrator 2 and the protection frame 4. The performance of the high-damping polyurethane material of the damping layer 3 positioned on the rail web, the upper flange of the rail bottom and the bottom surface of the rail bottom can be different, so that the synchronous control of the vibration noise with different frequencies is realized.
The section of the counterweight vibrator 2 is of a honeycomb hexagonal structure, and the counterweight vibrator 2 is in a strip shape or a granular shape along the longitudinal direction of the steel rail. The weight of the counterweight vibrator is designed and determined according to the requirements of vibration reduction and noise reduction. The counterweight vibrator 2 can be made of high-density metal materials such as steel, lead, tungsten and the like, and can also be made of non-metal materials such as silicon dioxide, mica, ceramic and the like. The counterweight vibrators 2 can be strip-shaped and can be continuously arranged in the longitudinal direction of the steel rail, can also be discontinuous strip-shaped which is discontinuously arranged, and can also adopt a particle structure. In actual implementation, the size and the number of the counterweight vibrators 2 can be adjusted according to the design requirements of vibration damping and noise reduction of the field use environment. The materials of the counterweight vibrators 2 positioned on the rail web, the upper flange of the rail bottom and the bottom surface of the rail bottom can be different from each other, so that the counterweight vibrators are matched with the damping layer 3 to realize synchronous control of vibration noises with different frequencies.
Referring to fig. 1 and 2, the clamp 5 is wrapped around the outer surface of the protection frame 4. The whole clamp 5 is of a U-like structure, and the inner surface of the clamp 5 is tightly attached to the outer frame of the protective frame 4.
The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device has the following characteristics:
(1) the invention integrates the advantages of the damping steel rail and the dynamic vibration absorber, breaks through the bottleneck that the working frequency range of the vibration and noise reduction device of the traditional steel rail damping device is limited, and can effectively design and control the vibration noise under multiple frequencies. When the counterweight vibrator 2 vibrates along with the steel rail 1, a plurality of mass-spring systems which are distributed are formed, and the vibration energy of the steel rail is consumed by means of the reciprocating vibration of the counterweight vibrator 2 at a balance position; meanwhile, the relative motion between the adjacent counterweight vibrators 2 causes the extrusion and shearing deformation of the middle damping layer 3, and a large amount of vibration energy transmitted by the steel rail 1 can be consumed.
(2) Through distributing counter weight oscillator 2 in elastic damping layer 3, can avoid the big mass balancing weight to concentrate on the problem such as the falling side of turning on one's side that the rail flank leads to.
(3) The traditional damping steel rail achieves the purpose of increasing the shear deformation energy consumption of a damping layer by adding a complex expansion connecting layer and a complex constraint layer. According to the invention, the elastic damping material is extruded to deform and consume energy through the relative motion of the distributed counterweight oscillator 2, the counterweight oscillator 2 replaces an expansion connecting layer and a constraint layer in the traditional damping steel rail, the shearing area of the elastic damping material is not influenced, and the manufacturing process is simplified.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. Device of making an uproar falls in damping vibration attenuation is synthesized to quality distributing type rail, it is applied to rail (1), rail (1) have the working face that is located the top, be located the rail end of bottom and connect the working face with the web of a rail end, its characterized in that: comprises a counterweight vibrator (2), a damping layer (3) and a protective frame (4);
the outer surface at the web of rail (1) and rail end is wrapped up in bearer bar (4), damping layer (3) hold in inside bearer bar (4), it is a plurality of to distribute in damping layer (3) counter weight oscillator (2).
2. The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device according to claim 1, characterized in that: the protective frame (4) is provided with an inner frame contacting the steel rail (1) and an outer frame wrapping the outer side of the damping layer (3);
the inner wall of the outer frame is provided with a plurality of reinforcing ribs (41) connected with the inner frame.
3. The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device according to claim 1, characterized in that: the outer surface of the protective frame (4) is wrapped with a clamp (5).
4. The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device according to claim 1, characterized in that: the section of the counterweight vibrator (2) is of a honeycomb hexagonal structure, and the counterweight vibrator (2) is strip-shaped or granular along the longitudinal direction of the steel rail.
5. The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device according to claim 1, characterized in that: the damping layer (3) is made of polyurethane material or other high-damping-performance materials.
6. The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device according to claim 1, characterized in that: the material of the counterweight vibrator (2) is a high-density nonmetal or metal, such as one or more of silicon dioxide, mica, ceramic, steel, lead and tungsten.
7. The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device according to claim 2, characterized in that: the thickness of inside casing is 1~2mm, the thickness of frame is 2~4 mm.
8. The mass distribution type steel rail comprehensive damping vibration attenuation and noise reduction device according to claim 2, characterized in that: the protective frame (4) is made of metal with high elastic modulus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010558752.5A CN111749056A (en) | 2020-06-18 | 2020-06-18 | Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010558752.5A CN111749056A (en) | 2020-06-18 | 2020-06-18 | Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail |
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| CN111749056A true CN111749056A (en) | 2020-10-09 |
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| CN202010558752.5A Pending CN111749056A (en) | 2020-06-18 | 2020-06-18 | Comprehensive damping vibration-damping noise-reducing device for mass-distributed steel rail |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106792A (en) * | 2021-04-19 | 2021-07-13 | 晟建科技集团有限公司 | Linear particle steel rail vibration absorber |
| CN113373740A (en) * | 2021-05-18 | 2021-09-10 | 上海工程技术大学 | Movable self-adaptive steel rail vibration absorber structure containing magnetic vibrators |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106792A (en) * | 2021-04-19 | 2021-07-13 | 晟建科技集团有限公司 | Linear particle steel rail vibration absorber |
| CN113373740A (en) * | 2021-05-18 | 2021-09-10 | 上海工程技术大学 | Movable self-adaptive steel rail vibration absorber structure containing magnetic vibrators |
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Application publication date: 20201009 |