A damping device for rail transit

Abstract

The present application relates to the field of rail transit, in particular to a damping device for rail transit, which comprises a sleeper and a steel rail, the steel rail is arranged on the sleeper through a cushion plate, the bottom end surface of a plurality of arc-shaped buffer inserts is respectively inserted into a first buffer groove and a second buffer groove, two support blocks are respectively located on the upper surface of an inclined base and the outer surface of a vertical base, the inner surfaces of the two support blocks are respectively connected with the end surfaces of the two groups of buffer inserts, the horizontal crossbars of two L-shaped support rods are connected to the upper surfaces of the support blocks, the vertical bars of the L-shaped support rods are attached to the outer surfaces of the vertically installed support blocks, the threaded segments of hexagonal screws are threadedly connected to the threaded holes formed in the outer surfaces of the support blocks through the washers located on the surfaces of the L-shaped support rods, and the present application effectively prevents the existing rail dampers from only being able to buffer and dampen the steel rail through simple elastic strips and cushion plates, thereby affecting the efficient damping operation of the existing rail dampers on the bent rail of the steel rail.

Description

Technical Field

[0001] This invention relates to the field of rail transit technology, specifically to a vibration reduction device for rail transit. Background Technology

[0002] When a subway train travels on the laid tracks, the force generated by the numerous wheels acting simultaneously with the rails causes vibrations in both the train and the rail structure (including the track bed, fasteners, and rails).

[0003] Although existing railway tracks are equipped with track vibration dampers at appropriate locations during installation, these dampers mostly consist of spring clips on the lower rail surface and buffer pads on the sides of the lower rail surface. When a train travels to a curved section of the track, the force generated by the train will cause the curved rail to tilt inward. Obviously, the components that use spring clips and buffer pads for damping are insufficient to support the inward tilting vibration of the rail when the train travels to the curved section of the track. Consequently, existing track vibration dampers cannot effectively reduce vibration at the curves of the track. Summary of the Invention

[0004] The purpose of this invention is to provide a vibration damping device for rail transit to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a vibration damping device for rail transit, comprising a sleeper and a rail, wherein the rail is mounted on the sleeper via a pad, and retractable damping components are symmetrically arranged on the sleeper. The symmetrical damping components are mounted on the lower rail surface of the arc-shaped rail, and the symmetrical retractable damping components are used to buffer and constrain the vibration force generated by the train during train travel on the arc-shaped section of the rail.

[0006] Preferably, the damping and shock absorption assembly includes an inclined base, a vertical base, damping strips, support blocks, L-shaped support rods, washers, hexagonal screws, and embedding blocks; the symmetrical inclined base is fixed to the upper surface of the lower rail surface of the rail, and the upper surface of the inclined base has multiple first damping grooves along its arc length direction; the symmetrical vertical base is fixed to the side surface of the lower rail surface of the rail, and the outer side surface of the vertical base has multiple second damping grooves along its arc length direction; the bottom ends of the multiple arc-shaped damping strips are slidably inserted into the first and second damping grooves respectively; the two support blocks are respectively located on the inclined base. The upper surface of the base and the outer side of the vertical base, and the inner side of the two support blocks are respectively connected to the exposed end faces of two sets of multiple buffer strips; the horizontal crossbars of the two L-shaped support rods are attached to the upper surface of the horizontally installed support block, and the vertical bar of the L-shaped support rod is attached to the outer side of the vertically installed support block; both the horizontal crossbar and the vertical bar of the L-shaped support rod are provided with through holes, and the threaded section of the hexagonal screw passes through the washer threaded on the surface of the L-shaped support rod and is connected to the threaded hole opened on the outer side of the support block; the lower surface of the vertical bar of the L-shaped support rod is connected to the vertical bar, and the embedded block is fixedly embedded in the sleeper for fixed support of the L-shaped support rod.

[0007] Preferably, each of the first and second buffer grooves is fixed with a rubber buffer pad, and the rubber buffer pad has a buffer cavity. Each buffer cavity is sealed and slidably inserted with a buffer strip, and each buffer cavity is filled with damping oil.

[0008] Preferably, the bottom width of the buffer cavity is greater than the width of its opening, the bottom end width of the buffer strip is greater than the width of its upper two sides, and the buffer strip is made of wear-resistant hard rubber material.

[0009] Preferably, the L-shaped support rod is provided with a limiting sliding assembly, which includes an annular sleeve, a spring plate, and a rubber damping plate. The horizontal and vertical bars of the L-shaped support rod are provided with sliding grooves, and the annular sleeve is slidably disposed in the sliding groove. A hexagonal screw is threaded into the annular sleeve. The two ends of the spring plate are respectively connected to the annular sleeve and the groove wall of the sliding groove, and the spring plate is located in the sliding groove. The symmetrical rubber damping plates are fixed on the two side groove walls of the sliding groove, and the symmetrical rubber damping plates are rubbed against the outer surface of the spring plate.

[0010] Preferably, an elastic sealing membrane surrounds the inclined base and the vertical base with the support block, and the multiple buffer cavities are interconnected through oil guide pipes.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. This invention fixes the rail to the sleeper using a buffer and vibration damping assembly. Multiple buffer strips are slidably inserted into the inclined base and the vertical base, rather than being exposed to the outside. At the same time, the vibration force generated at the bend of the rail does not act directly on the existing elastic strip or buffer pad, but is reduced and noise reduced by the contraction-type buffer damping of the buffer strips and the damping oil filled in the buffer groove. This improves the vibration and noise reduction effect and service life of the buffer and vibration damping assembly of this invention.

[0013] 2. By using rubber material for both the buffer insert and the rubber buffer pad, this invention can prevent the buffer insert from being made of metal material. If the buffer insert is made of metal material and is slid into the inclined and vertical bases of the metal material for a long time, the inclined and vertical bases will be exposed to the outside for a long time and are prone to rust, which will affect the service life of the buffer insert. At the same time, when the wide part of the buffer insert is sealed and pressed against the inner wall of the buffer cavity, it can prevent rust particles and impurities from entering the buffer cavity through the gap between the buffer insert and the buffer cavity, which would easily cause wear to the rubber buffer insert and the rubber buffer pad. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of the buffer and vibration damping component of the present invention;

[0016] Figure 3 This is a cross-sectional view of the inclined base block of the present invention.

[0017] In the diagram: 1. Sleeper; 2. Rail; 3. Buffer and vibration damping assembly; 31. Inclined base; 311. First buffer groove; 32. Vertical base; 321. Second buffer groove; 33. Buffer insert; 34. Support block; 35. L-shaped support rod; 351. Sliding groove; 36. Washer; 37. Hexagonal screw; 38. Embedded block; 4. Rubber buffer pad; 41. Buffer cavity; 5. Limiting sliding assembly; 51. Annular sleeve; 52. Spring plate; 53. Rubber damping plate; 6. Elastic sealing membrane; 7. Oil guide pipe. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1:

[0020] like Figures 1 to 3As shown, this invention provides a technical solution for a vibration damping device for rail transit: a vibration damping device for rail transit includes a sleeper 1 and a rail 2. The rail 2 is mounted on the sleeper 1 via a pad. Symmetrically arranged on the sleeper 1 are retractable damping components 3. These retractable damping components 3 are positioned on the lower rail surface of the arc-shaped rail 2, and are used to buffer and constrain the vibration force generated by the train traveling on the arc-shaped section of the rail 2. In this invention, the retractable damping components 3 are installed at the curve of the rail 2. Therefore, when a train passes the curve of the rail 2, the horizontal or inward tilting vibration force or centripetal force generated by the train on the curve is absorbed and damped by the retractable damping components 3. This effectively prevents the existing rail vibration dampers from only being able to buffer and dampen the rail 2 with simple spring bars and buffer pads, without the ability to retract and dampen, thus affecting the efficient vibration damping operation of the existing rail vibration dampers at the curve of the rail 2.

[0021] As one embodiment of the present invention, the buffer and vibration damping assembly 3 includes an inclined base 31, a vertical base 32, a buffer insert 33, a support block 34, an L-shaped support rod 35, a washer 36, a hexagonal screw 37, and an embedded block 38.

[0022] The inclined base 31 is symmetrically fixed to the upper surface of the lower rail surface of the rail 2, and the upper surface of the inclined base 31 is provided with a plurality of first buffer grooves 311 along its arc length direction.

[0023] The vertical base 32 is symmetrically fixed to the side surface of the lower rail surface of the rail 2, and the outer side surface of the vertical base 32 is provided with a plurality of second buffer grooves 321 along its arc length direction.

[0024] The bottom end faces of the multiple arc-shaped buffer inserts 33 are slidably inserted into the first buffer groove 311 and the second buffer groove 321 respectively.

[0025] Support blocks 34, two of the support blocks 34 are respectively located on the upper surface of the inclined base 31 and the outer side of the vertical base 32, and the inner side of the two support blocks 34 are respectively connected to the exposed end faces of two sets of multiple buffer strips 33.

[0026] L-shaped support rods 35, the horizontal crossbars of the two L-shaped support rods 35 are attached to the upper surface of the horizontally installed support block 34, and the vertical bar of the L-shaped support rods 35 is attached to the outer side of the vertically installed support block 34.

[0027] The hexagonal screw 37 has through holes on both the horizontal and vertical bars of the L-shaped support rod 35, and the threaded section of the hexagonal screw 37 passes through the washer 36 located on the surface of the L-shaped support rod 35 and is threaded into the threaded hole on the outer side of the support block 34.

[0028] An embedded block 38 is connected to the lower surface of the vertical rod of the L-shaped support rod 35, and the embedded block 38 is fixedly embedded in the sleeper 1 to provide fixed support for the L-shaped support rod 35. In this invention, two arc-shaped inclined bases 31 and vertical bases 32 with buffer grooves are fixed to the upper surface and side surface of the lower rail surface of the rail 2 by welding or other fixing methods. Then, multiple buffer strips 33 are slidably inserted into multiple first buffer grooves 311 and multiple second buffer grooves 321, so that the bottom end faces of the multiple buffer strips 33 are in a non-contact state with the bottom of the buffer groove. At this time, the construction personnel can continuously inject damping oil into the multiple buffer grooves, and then the two support blocks 34 are respectively connected to... The buffer strip 33, inserted into the inclined base 31, and the elastic strip, slidably inserted into the vertical base 32, are fixedly connected. Then, the support block 34, located on the outer side of the vertical base 32, is fixedly embedded into the sleeper 1 via the embedding block 38. Next, the construction workers fix the horizontal bar of the L-shaped support rod 35 to the support block 34 above the inclined base 31 using hexagonal screws 37 and washers 36. The vertical bar of the L-shaped support rod is then fixed to the outer side of the vertically installed support block 34. This allows the retractable buffer and vibration damping assembly 3 to be installed at the curved section of the rail 2. Therefore, when a traveling train generates horizontal or inwardly inclined vibration forces at the curved section of the rail 2, the rail 2 will be affected by the opening within the vertical base 32. The second buffer groove 321 is designed to retract and slide on the outer side of the buffer strip 33. The damping oil filled in the second buffer groove 321 will buffer and dampen the buffer strip 33, effectively preventing the existing track vibration damper from generating horizontal or inward contraction and damping force when the train travels to the curve of the rail 2, which would easily lead to large vibration force on the rail 2 and affect the service life of the rail 2. When the traveling train generates vertical vibration force on the curve of the rail 2, causing the rail 2 to jump vertically, the inclined base 31 fixed on the lower rail surface of the rail 2 will pass through multiple first buffer grooves 311. The multiple buffer strips 33 slide and contract, while the damping oil filled in the first buffer groove 311 acts as a buffer and damping agent for the buffer strips 33, thereby providing vertical buffer and vibration reduction for the rail 2. At the same time, since the multiple buffer strips 33 slide into the inclined base 31 and the vertical base 32 instead of being exposed to the outside, and the vibration force generated at the bend of the rail 2 does not directly act on the existing spring strip or buffer pad, but is reduced and noise reduced by the contraction and damping of the buffer strips 33 and the damping oil filled in the buffer groove, the vibration force on the rail 2 can be reduced through the contraction and damping action. This can improve the vibration reduction and noise reduction effect and service life of the buffer and vibration reduction component 3 of the present invention.

[0029] In one embodiment of the present invention, a rubber buffer pad 4 is fixed in each of the first buffer groove 311 and the second buffer groove 321, and a buffer cavity 41 is formed in the rubber buffer pad 4. A buffer strip 33 is slidably inserted into each buffer cavity 41, and each buffer cavity 41 is filled with damping oil. The present invention designs a system in which rubber buffer pads 4 are fixedly set in multiple buffer grooves formed on the inclined base 31 and the vertical base 32, and multiple buffer strips 33 are slidably inserted into multiple buffer cavities 41 respectively. This can increase the friction between the buffer strips 33 and the rubber buffer pad 4, and further improve the buffering, vibration reduction and noise reduction effect of the buffering and vibration damping assembly 3 on the curved section of the rail 2.

[0030] In one embodiment of the present invention, the bottom width of the buffer cavity 41 is greater than the width of its opening, and the bottom end width of the buffer strip 33 is greater than the width of its upper two sides. The buffer strip 33 is made of wear-resistant hard rubber material. The present invention's design, by making the bottom end width of the buffer strip 33 greater than the top end width, can prevent the buffer strip 33 from falling off when it slides inside the buffer cavity 41. Simultaneously, when the curved section of the rail 2 descends and bounces due to the vibration, the wider part of the bottom end of the buffer strip 33 slides upwards inside the buffer cavity 41, which seals and compresses the inner wall of the buffer cavity 41. Furthermore, the buffer strip 33 is also made of wear-resistant hard rubber material. This further increases the friction between the buffer strip 33 and the buffer cavity 41. Furthermore, both the buffer strip 33 and the rubber buffer pad 4 are made of rubber. This prevents the buffer strip 33 from rusting if it were made of metal and slid into the inclined base 31 and vertical base 32 for an extended period, as the latter would be exposed to the outside for a long time. This would affect the service life of the buffer strip 33. Additionally, when the wide part of the buffer strip 33 is pressed against the inner wall of the buffer cavity 41, it prevents rust particles and impurities from entering the buffer cavity 41 through the gap between the buffer strip 33 and the buffer cavity 41, thus preventing wear on the rubber buffer strip 33 and the rubber buffer pad 4.

[0031] In one embodiment of the present invention, a limiting sliding assembly 5 is provided on the L-shaped support rod 35. The limiting sliding assembly 5 includes an annular sleeve 51, a spring plate 52, and a rubber damping plate 53. Sliding grooves 351 are provided on both the horizontal and vertical sections of the L-shaped support rod 35, and an annular sleeve 51 is slidably disposed within the sliding groove 351. A hexagonal screw 37 is threaded into the annular sleeve 51. The two ends of the spring plate 52 are respectively connected to the annular sleeve 51 and the groove wall of the sliding groove 351, and the spring plate 52 is located symmetrically within the sliding groove 351. The rubber damping sheet 53 is fixed on both sides of the sliding groove 351, and the symmetrical rubber damping sheets 53 are rubbed against the outer side of the spring sheet 52. In order to avoid the support block 34 located above the inclined base 31 and the support block 34 on the side of the vertical base 32 being rigidly connected by an L-shaped support rod 35 and affecting the horizontal contraction and sliding of the vertical base 32, a limiting sliding component 5 is provided on the L-shaped support rod 35. When the L-shaped support rod 35 is connected to the two support blocks 34, a hexagonal screw 37 needs to be threaded through it. The annular sleeve 51 is connected to the threaded hole on the support block 34. When the curved rail of the rail 2 is subjected to horizontal or inclined centripetal vibration force when a train turns, causing the curved rail of the rail 2 to slip and move the vertical base 32 closer to the vertically set support block 34, the annular sleeve 51 located on the crossbar of the L-shaped support rod 35 will slide along the sliding groove 351 under the action of the hexagonal screw 37. The cooperation between the spring plate 52 set in the sliding groove 351 and the rubber damping plate 53 that rubs against it can limit the sliding of the annular sleeve 51. Meanwhile, the sliding friction between the spring sheet 52 and the rubber damping sheet 53 further buffers and reduces vibrations on the horizontally or inclined rail 2. When the rail 2 jumps upward, the vertical base 32 and support block 34 on the side of the rail 2 will drive the hexagonal screw 37 on the side to slide in the sliding groove 351 opened on the vertical rod of the L-shaped support rod 35. This will not affect the effect of the buffer strip 33 shrinking and sliding in the inclined base 31 or the vertical base 32, thus enabling efficient buffering and vibration reduction at the curved section of the rail 2.

[0032] In one embodiment of the present invention, an elastic sealing membrane 6 is provided between the inclined base 31 and the vertical base 32 and the support block 34, and the plurality of buffer cavities 41 are interconnected through oil guide pipes 7; the present invention provides an elastic sealing membrane 6 directly between the base and the support block 34, so that the elastic sealing membrane 6 can seal the buffer gap between the inclined base 31 and the vertical base 32 and the support block 34, preventing gravel around the rail 2 from splashing into the buffer gap between the base and the support block 34, thereby affecting the inclined base 31 or the vertical base 32. The sliding and retraction of the buffer insert 33 that is slidably inserted into the base 32; the multiple buffer cavities 41 in the inclined base 31 and the multiple buffer cavities 41 in the vertical base 32 are connected through the oil guide pipe 7, so that the damping oil in the buffer cavity 41 in the inclined base 31 and the damping oil in the buffer cavity 41 in the vertical base 32 can flow to each other through the oil guide pipe 7 when they are respectively subjected to the retraction and insertion of the multiple buffer inserts 33, thereby preventing the damping oil filled in the buffer cavity 41 from being too much and affecting the buffer retraction and vibration reduction of the buffer insert 33 in the buffer groove.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rail transit vibration damping device, comprising a sleeper (1) and a steel rail (2), characterized in that, The rail (2) is arranged on the sleeper (1) through a base plate, the sleeper (1) is symmetrically provided with a contraction type buffer damping assembly (3), the symmetric buffer damping assembly (3) is arranged on the lower rail surface of the arc-shaped rail (2), and the symmetric contraction type buffer damping assembly (3) is used for buffering and restraining the vibration force generated by the train when the arc-shaped section of the rail (2) is subjected to the vibration force; The buffer damping assembly (3) comprises an inclined base (31), a vertical base (32), a buffer insert (33), a support block (34), an L-shaped support rod (35), a washer (36), a hexagonal screw (37) and an embedded block (38); The inclined base (31) is symmetrically fixed on the upper surface of the lower rail surface of the rail (2), and a plurality of first buffer grooves (311) are formed in the upper surface of the inclined base (31) along the arc length direction of the inclined base (31); The vertical base (32) is symmetrically fixed on the side surface of the lower rail surface of the rail (2), and a plurality of second buffer grooves (321) are formed in the outer side surface of the vertical base (32) along the arc length direction of the vertical base (32); The buffer insert (33) is symmetrically fixed on the upper surface of the lower rail surface of the rail (2), and a plurality of first buffer grooves (311) are formed in the upper surface of the inclined base (31) along the arc length direction of the inclined base (31); The support block (34) is arranged on the upper surface of the inclined base (31) and the outer side surface of the vertical base (32), and the inner side surfaces of the two support blocks (34) are connected with the outlet end surfaces of the two groups of buffer inserts (33); The L-shaped support rod (35) is arranged on the upper surface of the support block (34) and the outer side surface of the support block (34), and the vertical rod of the L-shaped support rod (35) is arranged on the outer side surface of the support block (34); The hexagonal screw (37) is arranged on the horizontal cross rod and the vertical rod of the L-shaped support rod (35), and the threaded segment of the hexagonal screw (37) is threadedly connected to the threaded hole formed in the outer side surface of the support block (34) through the washer (36) arranged on the surface of the L-shaped support rod (35); The embedded block (38) is connected to the lower surface of the vertical rod of the L-shaped support rod (35), and the embedded block (38) is fixedly embedded in the sleeper (1) to support the L-shaped support rod (35); The rubber buffer pad (4) is fixed in each first buffer groove (311) and second buffer groove (321), and the buffer cavity (41) is formed in the rubber buffer pad (4); the buffer insert (33) is sealingly and slidingly inserted into each buffer cavity (41), and the damping oil is filled in each buffer cavity (41). The L-shaped supporting rod (35) is provided with a limiting sliding assembly (5), the limiting sliding assembly (5) comprises an annular sleeve (51), a spring sheet (52) and a rubber damping sheet (53), the horizontal rod and the vertical rod of the L-shaped supporting rod (35) are both provided with a sliding groove (351), the annular sleeve (51) is slidably arranged in the sliding groove (351), the hexagonal screw (37) is threadedly connected into the annular sleeve (51), the two ends of the spring sheet (52) are connected to the sleeve wall of the sliding groove (351) and the annular sleeve (51) respectively, and the spring sheet (52) is located in the sliding groove (351), the symmetrical rubber damping sheets (53) are fixed on the two side sleeve walls of the sliding groove (351), and the symmetrical rubber damping sheets (53) are frictionally attached to the outer side surface of the spring sheet (52).

2. The damping device for rail transit according to claim 1, characterized in that: The width of the bottom of the buffer cavity (41) is greater than the width of the cavity mouth, the width of the bottom end surface of the buffer plug (33) is greater than the width of the two side surfaces of the upper end, and the buffer plug (33) is made of wear-resistant hard rubber material.

3. The damping device for rail transit according to claim 1, characterized in that: The inclined base (31) and the vertical base (32) and the supporting block (34) are surrounded by an elastic sealing film (6), and a plurality of buffer cavities (41) are connected with each other through oil guide pipes (7).

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