CN110373958B - A vibration-damping fastener system - Google Patents
A vibration-damping fastener system Download PDFInfo
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- CN110373958B CN110373958B CN201811283604.6A CN201811283604A CN110373958B CN 110373958 B CN110373958 B CN 110373958B CN 201811283604 A CN201811283604 A CN 201811283604A CN 110373958 B CN110373958 B CN 110373958B
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- fastener system
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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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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/62—Rail fastenings incorporating resilient supports
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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
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
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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
- E01B9/00—Fastening rails on sleepers, or the like
- E01B9/68—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair
- E01B9/685—Pads or the like, e.g. of wood, rubber, placed under the rail, tie-plate, or chair characterised by their shape
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Vibration Prevention Devices (AREA)
Abstract
The invention discloses a vibration reduction fastener system which sequentially comprises an elastic pad (6) under a rail, a first backing plate (5), a first elastic layer (4) and a second backing plate (3) from top to bottom; the damping fastener system comprises a second elastic layer (2), a support column (7), a connecting sleeve (9) and an anchor bolt (12), wherein the second elastic layer (2) is positioned at the lower side of the second base plate (3); the support column (7) is matched with the connecting sleeve (9) to connect the first base plate (5), the first elastic layer (4), the second base plate (3) and the second elastic layer (2) together, and the damping fastener system is fastened on the ballast bed by the anchor bolts (12); the invention provides a compression-based high-grade vibration damping fastener, which adopts a mode of arranging a backing plate and an elastic layer at intervals, so that the elastic layer forms a serial connection mode to obtain lower vertical rigidity, thereby achieving higher vibration damping effect; meanwhile, the steel rail can directly fall on the ground, so that the use safety is ensured, and the popularization is accepted by utilizing the market.
Description
Technical Field
The invention belongs to the field of rail transit, and relates to a vibration reduction fastener system.
Background
The environmental problem caused by wheel-rail vibration is one of the main problems affecting urban rail transit development, and the rail damper, namely the damping fastener, is one of the main damping measures adopted by the current rail system. Compared with ballast vibration reduction and sleeper vibration reduction measures which are required to be arranged in a concrete foundation, the fastener vibration reduction measures have obvious advantages in the aspects of construction cost, construction convenience and replacement and maintenance.
At present, common vibration damping fasteners and medium vibration damping fasteners are rapid in development and wide in application. The common vibration damping fasteners are usually in the form of single-layer backing plates, the under-rail elastic pads and under-plate elastic pads provide elasticity together, and the backing plates are fixed on the sleeper or the ballast bed through spikes. The problem of this kind of fastener lies in that during actual circuit installation, the constructor often screws up the spike too tightly for guarantee circuit safety for the elastic pad loses elasticity under the board, and the damping function obviously reduces, and the lateral shear force of spike is great simultaneously.
The most commonly used at present is double-deck nonlinear damping fastener among the medium damping fastener, and it comprises double-deck backing plate and double-deck elastic cushion, can guarantee that middle elastic cushion is fully distributed and is waved the function, and the fastener bottom sets up the coupling board simultaneously, can greatly reduced rail spike lateral shear force. The two layers of base plates are vulcanized and bonded through the elastic layer, but the adhesive fastener is extremely easy to be separated due to aging of the elastic layer, so that the safety is low. In addition, there are various forms of medium vibration damping fasteners, as well as anti-release adhesive fasteners.
The lower the vertical stiffness of the fastener system, the better the vibration isolation effect. The current commonly used double-layer pad vibration damping fasteners (CN 2630303Y, CN205134109U, CN 203755094U) and other structures, while adopting a vibration damping mode that an elastic layer and a pad are arranged at intervals, the rigidity of an elastic layer under a rail is usually more than 40kN/mm in order to ensure the deformation safety of an elastic strip; in order to ensure the service life of the elastic layer, the rigidity of the middle elastic layer cannot be infinitely reduced (the elastic layer is excessively deformed to accelerate aging fatigue, and the service life cannot meet the requirements), and under the double limitation, the fastener structure can only achieve the medium vibration reduction effect at most.
Common vibration damping fasteners (with vertical rigidity of 40-200 kN/mm) and medium vibration damping fasteners (with rigidity of 15-40 KN/mm) cannot meet the requirement of high vibration damping (10-15 dB) due to the reasons. Thus low vertical stiffness rail fasteners have received increasing attention in recent years.
The prior high-grade vibration damping fasteners at home and abroad are pioneer fasteners (WO 2005009817) produced by Pan Delu company in the United kingdom and floating rail fasteners (201110351159.4) of double Rui rubber and plastic technology Co.Ltd. Both of these patents employ a structural form that supports the rail from the web so that the rail is suspended above the rail, thereby achieving a lower vertical stiffness. But this type fastener needs to adopt specialized tool to install on line, and the spare part that uses is difficult to unify with other fasteners, and installation maintenance is inconvenient, and the support mode that the rail was floated in addition is from the visual inspection perspective, and the security can't guarantee when taking place the broken rail condition, therefore the acceptance level in the market is lower.
Through the analysis, the common vibration damping fasteners and the medium vibration damping fasteners which are commonly used at present can be widely applied and have various structures, but the requirements of higher vibration damping can not be met; while the rail suspension type supporting fastener can realize higher vibration reduction, the application is obviously limited due to low market acceptance, so that higher or special vibration reduction road sections have to adopt vibration reduction measures such as ballast bed vibration reduction pads, steel spring floating plates and the like, which have high cost, long construction period and difficult maintenance and replacement, and cause a plurality of inconveniences.
In view of this, the present invention has been proposed.
Disclosure of Invention
The present invention is directed to a vibration damping fastener system that solves the above-mentioned problems.
In order to achieve the aim of the invention, the invention adopts the following technical scheme:
A vibration reduction fastener system, which sequentially comprises an elastic pad under a rail, a first backing plate, a first elastic layer and a second backing plate from top to bottom; the damping fastener system comprises a second elastic layer, a support column, a connecting sleeve and an anchor bolt, wherein the second elastic layer is positioned on the lower side of the second base plate; the support column is matched with the connecting sleeve to connect the first base plate, the first elastic layer, the second base plate and the second elastic layer together, and the anchor bolt is used for fastening the vibration reduction fastener system on the ballast bed.
Preferably, the support column comprises a column body, wherein one end of the column body is provided with a bottom plate, and the other end of the column body is sleeved with a connecting sleeve; the bottom plate is matched with the second elastic layer, and the connecting sleeve is buckled on the first base plate.
Preferably, a fourth through hole is formed in the second base plate, and a support column is installed in the fourth through hole; the shape of the fourth through hole is consistent with that of the bottom plate, and the bottom plate can pass through the fourth through hole and is clamped with the second backing plate after rotating for a certain angle.
Preferably, an eighth through hole is formed in the second elastic layer, a clamping pad is arranged on the inner wall, close to one end of the second base plate, of the eighth through hole, a seventh through hole is formed between the clamping pads, and the seventh through hole corresponds to a fourth through hole in the second base plate and is identical in shape.
Preferably, the eighth through hole is located at the lower side of the clamping pad to form a containing cavity, and the bottom plate on the support column is completely installed in the containing cavity.
Preferably, the surface of the second backing plate adjacent to the first elastic layer is provided with a first positioning protrusion; the first elastic layer is provided with a first positioning hole, and the first positioning hole is matched with the first positioning protrusion.
Preferably, a second positioning protrusion is arranged on the surface of the second backing plate 3 adjacent to the second elastic layer, a second positioning hole is arranged on the second elastic layer, and the second positioning hole is matched with the second positioning protrusion on the second backing plate.
Preferably, the first positioning protrusion and the second positioning protrusion are connected with the second backing plate into a whole through welding.
Preferably, the first positioning protrusion and the second positioning protrusion are square steel blocks.
Preferably, the elastic pad under the rail is provided with an arc-shaped part, the connecting sleeve is provided with a buckle plate, and the buckle plate is buckled on the first base plate; the arc-shaped part is matched with the buckle plate of the connecting sleeve in shape.
Advantageous effects
The novel high-grade vibration damping fastener with the structure does not adopt the existing suspension supporting structure, and obtains lower vertical rigidity in a multi-layer elastic layer coupling mode, so that a good vibration damping and vibration isolating effect is obtained, and meanwhile, the line safety is greatly improved.
The invention provides a compression-based high-level vibration damping fastener, which adopts a mode of arranging a backing plate and an elastic layer at intervals, so that the elastic layer forms a serial connection mode, and lower vertical rigidity is obtained, thereby achieving higher vibration damping effect, and meanwhile, a steel rail can directly fall on the ground, thereby ensuring use safety and utilizing market acceptance and popularization.
In the invention, although the elastic layer is additionally arranged, the installation height is increased relative to that of a common vibration damping fastener, and the transverse stability is possibly reduced, the fastener can eliminate the influence by a mechanical connection mode, a shoulder blocking mode and the like. In addition, the second backing plate adopts a steel plate with a conventional specification, the thickness of the second backing plate is far smaller than that of the backing plate formed by casting, and the thickness of the second backing plate is reduced although an elastic layer is additionally arranged, so that the height of the vibration damping fastener system is slightly larger than that of a common vibration damping fastener or a multi-layer medium vibration damping fastener system, and the transverse stability of the fastener system is ensured. In addition, the number of the backing plates and the number of the elastic layers are not as high as possible, and the arrangement mode of the two-layer backing plates and the three-layer elastic layers is the maximum series effect which can be achieved under the condition of meeting the requirement of the track installation height in consideration of the requirement of the track installation height.
Compared with the traditional fastener, the invention has the new technical effect that the second backing plate is provided with the elastic layers up and down in the vertical direction, so the second backing plate can be used as a mass block, has certain rigidity in the vertical direction and the transverse direction, can be regarded as a spring-mass system, and can be used as an independent resonance system; the second backing plate can be arranged as a continuous plate according to the requirement, and can be divided into a plurality of discontinuous plates for resonating different frequency sections, so that the adaptability of the fastener system is improved. The technical effect is that the prior common vibration damping fastener and the prior medium vibration damping fastener do not have.
Drawings
FIG. 1 is a schematic view of the overall structure of the vibration damping fastener system of the present invention;
FIG. 2 is a cross-sectional view taken along the direction B-B of FIG. 1;
FIG. 3 is a schematic view of the structure of a support post of the fastener system of the present invention;
FIG. 4 is a first view of the connection sleeve of the fastener system of the present invention;
FIG. 5 is a second view of the connecting sleeve of the fastener system of the present invention;
FIG. 6 is a schematic view of the structure of an under-rail resilient pad of the fastener system of the present invention;
FIG. 7 is a schematic view of the construction of a first backing plate of the fastener system of the present invention;
FIG. 8 is a schematic structural view of a first elastic layer of the fastener system of the present invention;
FIG. 9 is a schematic view of a second panel of the fastener system of the present invention;
FIG. 10 is a first perspective view of another construction of a second panel of the fastener system of the present invention;
FIG. 11 is a second view of another construction of a second panel of the fastener system of the present invention;
FIG. 12 is a third view of another construction of a second panel of the fastener system of the present invention;
FIG. 13 is a schematic view of a first view of a second elastic layer of the fastener system of the present invention;
FIG. 14 is a second view structural schematic diagram of a second elastic layer of the fastener system of the present invention;
fig. 15 is a schematic view of the working principle of the fastener system of the present invention.
Description of the reference numerals
The following reference numerals are given to further clarify the structure of the present invention and the connection relationship between the components, and are described.
The coupling backing plate 1, the second elastic layer 2, the seventh through hole 2.1, the second positioning hole 2.2, the eighth through hole 2.3, the clamping pad 2.4, the accommodating cavity 2.5, the second backing plate 3, the fourth through hole 3.1, the fifth through hole 3.2, the first positioning protrusion 3.3, the second positioning protrusion 3.4, the first elastic layer 4, the sixth through hole 4.1, the first positioning hole 4.2, the first backing plate 5, the steel rail connecting piece 5.1, the third through hole 5.2, the under-rail elastic pad 6, the arc-shaped part 6.1, the supporting column 7, the first through hole 7.1, the column 7.2, the end head 7.3, the bottom plate 7.4, the steel rail 8, the connecting sleeve 9, the clamping plate 9.1, the sleeve 9.2, the lock tongue 9.3, the second through hole 9.4, the cover plate 10, the gasket 11, the anchor bolt 12, the T-shaped bolt 13 and the fastening nut 14.
The technical scheme of the invention can be more clearly understood and described by the description of the reference numerals in combination with the embodiment of the invention.
Detailed Description
The invention will now be described with reference to the accompanying drawings and specific embodiments:
As shown in fig. 1, a vibration damping fastener system, as shown in fig. 1, includes an elastic layer and a pad, wherein the elastic layer includes an under-rail elastic pad 6, a first elastic layer 4 and a second elastic layer 2; the backing plate comprises a first backing plate 5 and a second backing plate 3. The elastic layer is made of rubber and polyurethane elastic materials; the backing plate can be produced by adopting metal and nonmetal materials; the hardness and density of the material used for the backing plate are both larger than those of the material used for the elastic layer. The elastic pad 6, the first backing plate 5, the first elastic layer 4, the second backing plate 3 and the second elastic layer 2 are arranged adjacently in sequence from top to bottom, so that the elastic layers and the backing plates are arranged at intervals. The lower side of the second elastic layer 2 is provided with a coupling backing plate 1. The first backing plate 5 is provided with a rail connecting piece 5.1 connected with a rail, as shown in fig. 2, the rail connecting piece 5.1 is designed according to line requirements, so as to be suitable for various elastic strips, such as an "e" type elastic strip, a "w" type elastic strip and the like, and thus the rail 8 is fixed. In this embodiment, the elastic strip is set as a "w" type elastic strip, the T-type bolt 13 is installed on the rail connecting piece 5.1, the screw head of the T-type bolt 13 is matched with the rail connecting piece 5.1, the stud of the T-type bolt 13 extends out of the elastic strip, the extending end of the stud is provided with the fastening nut 14, the fastening nut 14 is screwed down, and the "w" type elastic strip is fixed on the rail connecting piece 5.1.
The rail foot of the steel rail 8 is contacted with the rail lower elastic pad 6. The damping fastener system comprises a support column 7, a connecting sleeve 9 and an anchor bolt 12, wherein the support column 7 is matched with the connecting sleeve 9 to connect the first backing plate 5, the first elastic layer 4, the second backing plate 3 and the second elastic layer 2 into a whole. The cover plate 10 is arranged on the connecting sleeve 9, the anchor bolts 12 penetrate through the cover plate 10 and the supporting columns 7, the first base plate 5, the first elastic layer 4, the second base plate 3 and the second elastic layer 2 are used for fixing the vibration reduction fastener system on the road bed. A washer 11 is arranged between the cover plate 10 and the anchor bolt 12. As shown in fig. 3, the support column 7 includes a column 7.2, one end of the column 7.2 is provided with a tip 7.3, and the other end is provided with a bottom plate 7.4. Preferably, the cross-sectional dimensions of the head 7.3 are greater than the cross-sectional dimensions of the column 7.2. Preferably, the cross-sectional dimension of the base plate 7.4 is greater than the cross-sectional dimension of the tip 7.3. The support column 7 is provided with a first through hole 7.1, and the first through hole 7.1 penetrates through the end head 7.3, the column body 7.2 and the bottom plate 7.4. The bottom plate 7.4 is oblong. As shown in fig. 4-5, the connecting sleeve 9 includes a sleeve 9.2, a second through hole 9.4 is provided on the sleeve 9.2, a buckle 9.1 is provided at one end of the sleeve 9.2 outside the second through hole 9.4, and a lock tongue 9.3 is provided at the other end of the sleeve 9.2 inside the second through hole 9.4. The first backing plate 5, the first elastic layer 4, the second backing plate 3 and the second elastic layer 2 are arranged on the support column 7 from top to bottom, the end head 7.3 of the support column 7 is arranged in the second through hole 9.4 of the connecting sleeve 9, the connecting sleeve 9 is rotated, the lock tongue 9.3 at the end part of the connecting sleeve 9 is matched with the end face of the end head 7.3 of the support column 7, the connecting sleeve 9 is connected with the support column 7, namely the first backing plate 5, the first elastic layer 4, the second backing plate 3 and the second elastic layer 2 are fixedly connected.
As shown in fig. 6, the under-rail elastic pad 6 is provided with an arc-shaped portion 6.1, and the arc-shaped portion 6.1 is matched with the shape of the buckle plate 9.1 of the connecting sleeve 9, so that the buckle plate 9.1 is avoided.
As shown in fig. 7, the first pad 5 is provided with a third through hole 5.2, and the third through hole 5.2 and the rail connecting piece 5.1 are respectively located at two sets of diagonal positions of the rectangle.
As shown in fig. 8, a sixth through hole 4.1 is provided on the first elastic layer 4, and the sixth through hole 4.1 corresponds to the third through hole 5.2 on the first pad 5. The first elastic layer 4 is provided with a first positioning hole 4.2, and the first positioning hole 4.2 and the third through hole 5.2 are respectively positioned at two sets of diagonal positions of the rectangle. Preferably, the first positioning hole 4.2 is a square through hole.
As shown in fig. 9-12, the second pad 3 is provided with a fourth through hole 3.1, and the fourth through hole 3.1 corresponds to the third through hole 5.2 on the first pad 5 and the sixth through hole 4.1 on the first elastic layer 4. The fourth through hole 3.1 is oblong, and the shape of the fourth through hole is matched with the shape of the bottom plate 7.4 on the support column 7. Preferably, a first positioning protrusion 3.3 is arranged on the surface of the second pad 3 adjacent to the first elastic layer 4, the first positioning protrusion 3.3 is matched with the first positioning hole 4.2 on the first elastic layer 4, and is arranged in the first positioning hole 4.2, so that the first elastic layer 4 is limited, and the first elastic layer 4 is prevented from moving. Preferably, a second positioning protrusion 3.4 is provided on a surface of the second pad 3 adjacent to the second elastic layer 2, and the second positioning protrusion 3.4 corresponds to the first positioning protrusion 3.3 in position. Preferably, the first positioning protrusion 3.3 and the second positioning protrusion 3.4 are annular, and the second pad 3 is provided with a fifth through hole 3.2 in the annular interior of the first positioning protrusion 3.3 and the annular interior of the second positioning protrusion 3.4. In this embodiment, the second pad 3 is made of an existing steel plate with a conventional standard, and is directly punched to form a through hole, and the square steel block and the steel plate are integrally connected by welding, so as to form a first positioning protrusion 3.3 and a second positioning protrusion 3.4. The fifth through hole 3.2 is arranged in the embodiment, so that the square steel block and the steel plate are welded into a whole. The thickness of the steel plate with the conventional specification is 5mm, and compared with a base plate formed by casting, the thickness is reduced; the thickness of the steel plate selected in this embodiment is reduced compared to the thickness of the cast shim plate, but has a negligible effect on the stiffness of the fastener system. The steel plate with the conventional specification selected in the embodiment is formed by stamping, and then the square steel block and the steel plate are welded into a whole, so that the thickness of the second backing plate 3 can be reduced, defects caused by adopting a casting process can be effectively avoided, the process is simplified, and the cost is reduced.
As shown in fig. 13-14, the second elastic layer 2 is provided with an eighth through hole 2.3 and a second positioning hole 2.2. The eighth through hole 2.3 corresponds to the third through hole 5.2 on the first pad 5, the sixth through hole 4.1 on the first elastic layer 4, and the fourth through hole 3.1 on the second pad 3, and the support column 7 is installed therein. The second positioning hole 2.2 is matched with the second positioning protrusion 3.4 on the second backing plate 3, and the second positioning protrusion 3.4 is installed in the second positioning hole 2.2 to prevent the second elastic layer 2 from moving. The inner wall of the eighth through hole 2.3, which is close to one end of the second base plate 3, is provided with a clamping pad 2.4, so that an oblong seventh through hole 2.1 is formed at one end of the eighth through hole 2.3, which is close to the second base plate 3, and a containing cavity 2.5 is formed at one side of the eighth through hole 2.3, which is far away from the second base plate 3, and a bottom plate 7.4 on the supporting column 7 is contained in the containing cavity 2.5. The seventh through hole 2.1 is matched with the fourth through hole 3.1 on the second backing plate 3 and the bottom plate 7.4 on the supporting column 7 in shape. The bottom plate 7.4 on the support column 7 can pass through the seventh through hole 2.1 and the fourth through hole 3.1 on the second backing plate 3, and the bottom plate 7.4 is clamped with the second elastic layer 2 and the second backing plate 3 by rotating.
During assembly, the support column 7 is installed in the seventh through hole 2.1, the fourth through hole 3.1, the sixth through hole 4.1 and the third through hole 5.2, the oblong bottom plate 7.4 on the support column 7 is located in the accommodating cavity 2.5 of the second elastic layer 2, and the oblong bottom plate 7.4 is relatively dislocated with the seventh through hole 2.1 on the second elastic layer 2, namely, the bottom plate 7.4 is clamped with the clamping pad 2.4 on the second elastic layer 2. The connecting sleeve 9 is arranged between the support column 7 and the third through hole 5.2, the lock tongue 9.3 on the connecting sleeve 9 is matched with the end face of the upper end 7.3 of the support column 7, the connecting sleeve 9 and the support column 7 are connected together, the buckle plate 9.1 is buckled and pressed on the first base plate 5, and finally the first base plate 5, the first elastic layer 4, the second base plate 3 and the second elastic layer 2 are connected into a whole to form a preassembly piece, so that transportation and field installation are convenient. In this embodiment, the first elastic layer 4 and the second elastic layer 2 in the preassembly piece are compressed, so that the elastic energy of the storage part is stored, and the preassembly failure caused by falling off due to rotation of the support column 7 caused by non-artificial external force such as vibration in the transportation process can be effectively avoided. In addition, by rotating the support column 7, the support column 7 upper bottom plate 7.4 corresponds to the seventh through hole 2.1 on the second elastic layer 2 and the fourth through hole 3.1 on the second pad 3, and the support column 7 can be taken out from bottom to top, so that the first elastic layer 4 or the second elastic layer 2 can be directly pulled out for replacement. After the replacement is finished, the bottom plate 7.4 on the support column 7 corresponds to the seventh through hole 2.1 on the second elastic layer 2 and the fourth through hole 3.1 on the second base plate 3, the support column 7 passes through the seventh through hole 2.1 and is positioned in the accommodating cavity 2.5, and the support column 7 is rotated for 90 degrees, so that the bottom plate 7.4 and the seventh through hole 2.1 are relatively misplaced. And then the connecting sleeve 9 is arranged on the end head 7.3 of the supporting column 7, the connecting sleeve 9 is connected with the supporting column 7 by rotating, the pinch plate 9.1 is buckled on the first base plate 5, and finally the first base plate 5, the first elastic layer 4, the second base plate 3 and the second elastic layer 2 are connected into a whole.
In this embodiment, the first elastic layer 4, the second pad 3 and the second elastic layer 2 may be separately disposed. In this embodiment, the first elastic layer 4, the second pad 3 and the second elastic layer 2 may be bonded together during the preparation; the first elastic layer 4, the second backing plate 3 and the second elastic layer 2 are bonded into a whole, so that the mounting process can be reduced, and the assembly efficiency can be improved.
Compared with the traditional multilayer fastener, the invention brings new technical effects, the second backing plate 3 is provided with elastic layers vertically, so the second backing plate can be used as a mass block, has certain rigidity vertically and transversely, can be regarded as a spring-mass system, and can be used as an independent resonance system; the second pad 3 may be a continuous plate or may be divided into a plurality of discrete plates for resonating different frequency bands. The technical effect is that the prior common vibration damping fastener and the prior medium vibration damping fastener do not have.
As shown in fig. 15, the fastener system is installed on the ballast bed, and the backing plate and the elastic layer of the fastener system are adjacently arranged in sequence from top to bottom, and form a series system in the vertical direction, so that the fastener system obtains lower vertical rigidity. The displacement of the second backing plate in the vertical direction is not constrained, and the second backing plate serves as a separate resonance system to absorb vibration energy, so that vibration and noise are reduced. In practical engineering, the mass, the number and the shape of the second backing plate are adjusted according to the design requirement of the fastener system so as to adapt to different requirements.
The compression-based high-level vibration damping fastener provided by the invention adopts a mode of arranging the backing plate and the elastic layer at intervals, so that the elastic layer is in a serial connection mode, and lower vertical rigidity is obtained, thereby achieving higher vibration damping effect, and meanwhile, the steel rail can directly fall on the ground, thereby ensuring use safety and utilizing market acceptance and popularization.
In the invention, although the elastic layer is additionally arranged, the installation height is increased relative to that of a common vibration damping fastener, and the transverse stability is possibly reduced, the fastener can eliminate the influence by a mechanical connection mode, a shoulder blocking mode and the like. In addition, the second backing plate adopts a steel plate with a conventional specification, the thickness of the second backing plate is far smaller than that of the backing plate formed by casting, and the thickness of the second backing plate is reduced although an elastic layer is additionally arranged, so that the height of the vibration damping fastener system is slightly larger than that of a common vibration damping fastener or a multi-layer medium vibration damping fastener system, and the transverse stability of the fastener system is ensured. In addition, the number of the backing plates and the number of the elastic layers are not as high as possible, and the arrangement mode of the two-layer backing plates and the three-layer elastic layers is the maximum series effect which can be achieved under the condition of meeting the requirement of the track installation height in consideration of the requirement of the track installation height.
Compared with the traditional fastener, the invention has the new technical effect that the second backing plate is provided with the elastic layers up and down in the vertical direction, so the second backing plate can be used as a mass block, has certain rigidity in the vertical direction and the transverse direction, can be regarded as a spring-mass system, and can be used as an independent resonance system; the second backing plate may be a continuous plate or may be divided into a plurality of discrete plates for resonating different frequency bands. The technical effect is that the prior common vibration damping fastener and the prior medium vibration damping fastener do not have.
It should be noted that it will be apparent to those skilled in the art that various changes and modifications can be made to the present invention without departing from the principles of the invention, and such changes and modifications will fall within the scope of the appended claims.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811283604.6A CN110373958B (en) | 2018-10-31 | 2018-10-31 | A vibration-damping fastener system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811283604.6A CN110373958B (en) | 2018-10-31 | 2018-10-31 | A vibration-damping fastener system |
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| CN110373958A CN110373958A (en) | 2019-10-25 |
| CN110373958B true CN110373958B (en) | 2024-10-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112239972A (en) * | 2020-08-28 | 2021-01-19 | 中铁工程设计咨询集团有限公司 | Vulcanization vibration damping pad and vibration damping fastener |
| CN112593466A (en) * | 2020-12-16 | 2021-04-02 | 上海工程技术大学 | Vibration reduction fastener with double transverse limiting and low vertical rigidity |
| CN113047090B (en) * | 2021-04-30 | 2021-11-26 | 河北中烁轨道科技有限公司 | Vibration damping fastener system |
| CN113718565A (en) * | 2021-08-30 | 2021-11-30 | 中铁隆昌铁路器材有限公司 | Semi-separation type double-layer nonlinear vibration attenuation fastener |
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