A stepless vibration reduction and gain device for railway sleeper track bed based on the principle of angle amplification

Abstract

This invention relates to the field of railway sleeper track technology, and particularly to a stepless vibration reduction and gain device for railway sleeper track based on the principle of angle amplification. The stepless vibration reduction and gain device for railway sleeper track based on the principle of angle amplification specifically includes: a sleeper base, a transmission mechanism, a counterweight trolley, and an energy absorption mechanism; an upper rotating shaft is rotatably connected to an upper movable circular groove, and a lower rotating shaft is rotatably connected to a lower movable circular groove; the angle between the longitudinal axis and the horizontal centerline is the amplification angle α; when the upper rotating shaft is located in the lowermost upper movable circular groove and the lower rotating shaft is located in the uppermost lower movable circular groove, the amplification angle α is the minimum amplification angle α. min When the upper rotating shaft is located in the uppermost movable circular groove and the lower rotating shaft is located in the lowermost movable circular groove, the magnification angle α is the maximum magnification angle α. max The magnification angle α includes the combination of the number of upper movable circular groove groups multiplied by the number of lower movable circular groove groups. The magnification angle α is less than or equal to 45°. min ≤α≤α max The vibration can be continuously reduced within a range of ≤90°. This invention has the advantage of achieving stepless vibration reduction.

Description

Technical Field

[0001] This invention relates to the field of railway sleeper track bed technology, and in particular to a stepless vibration reduction and gain device for railway sleeper track beds based on the principle of angle amplification. Background Technology

[0002] As my country's urban rail transit network becomes increasingly sophisticated and its density increases year by year, newly built subway lines inevitably pass under buildings, bringing them closer to structures. Simultaneously, with the increasing size of cities, the growing resident population, and residents' growing demand for convenient commuting, many cities are addressing this by increasing the passenger capacity and operating speed of subway trains. However, this directly leads to intense interaction between the train and the track, and the resulting vibrations are transmitted through the track foundation to the tunnel structure, inducing vibrations in the soil and buildings along the line. This severely impacts the normal lives and work of residents along the line, as well as the proper use of precision instruments and equipment. Furthermore, the vibrations caused by train operation are repetitive and long-term, leading to structural deformation, uneven settlement between sections of the track, and tunnel seepage and leakage, among other problems, and even jeopardizing the safe operation of the line. Therefore, controlling and improving subway-induced vibrations is an unavoidable and crucial issue in the construction and operation quality of urban rail transit.

[0003] Currently, the basic principle of mainstream vibration control measures is to isolate or reduce the cross-structure propagation of vibration by weakening the connection between the components of the track structure. The common practice is to set up an elastic isolation layer between the upper and lower layers of the track structure. According to engineering experience, the smaller the stiffness of the isolation layer and the closer its position is to the foundation, the better its vibration reduction and isolation effect. It can be roughly divided into fastener vibration reduction (medium vibration reduction measure, vibration reduction ≤8dB), sleeper vibration reduction (high vibration reduction measure, 8dB < vibration reduction <15dB) and track bed vibration isolation (special vibration reduction measure, vibration reduction ≥15dB).

[0004] Trapezoidal sleeper track beds, as a traditional advanced vibration reduction measure, are a type of precast reinforced concrete longitudinal beam supported track structure. This composite track consists of prestressed concrete longitudinal beams and steel rails, with two longitudinal beams connected by steel pipes to form a frame. Elastic polyurethane high-elastic supports are installed under the prestressed longitudinal beams, allowing it to float on the concrete foundation. Essentially, it is a lightweight floating slab track structure. Due to its advantages such as light weight, low vibration, long service life of the elastic supports, and replaceable and maintainable supports, this track structure has been widely adopted by many cities, and its future development still has room for improvement.

[0005] The existing trapezoidal sleeper track bed has the following characteristics:

[0006] Difficulties in graded vibration reduction: In newly built subway lines, if trapezoidal sleeper track beds are used for graded vibration reduction, it is necessary to adjust the stiffness of the rubber pads under the sleepers or adjust the mass of the sleeper blocks in stages. The former is not conducive to mass production and is likely to lead to poor uniformity of stiffness along the track direction, thus affecting the smoothness of train operation and passenger comfort. The latter is usually achieved by increasing the thickness of the sleeper blocks, which will have an adverse effect on the control of track structure height.

[0007] Therefore, to address the shortcomings of existing technologies, a stepless vibration reduction gain device for railway sleeper track beds based on the principle of angle amplification is provided. Summary of the Invention

[0008] To overcome the shortcomings of existing technologies, this invention provides a stepless vibration reduction gain device for railway sleeper track beds based on the principle of angle amplification, aiming to solve the problem of difficulty in graded vibration reduction.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A stepless vibration reduction and gain device for railway sleeper track bed based on the principle of angle amplification is located between two trapezoidal sleepers and connected by connecting steel pipes. It includes: sleeper base, transmission mechanism, counterweight trolley and energy absorption mechanism.

[0011] The sleeper base includes a connecting seat and an upper stepless limiting groove. The connecting seat is connected to the connecting steel pipe, and the upper stepless limiting groove includes several upper movable circular grooves.

[0012] The counterweight trolley includes a lower stepless limiting groove, a trolley body, and a tail cone. The limiting groove and the tail cone are located at both ends of the trolley body. The lower stepless limiting groove includes several lower movable circular grooves. The tail cone is connected to the energy absorption mechanism.

[0013] The transmission mechanism includes an upper rotating shaft, a longitudinal shaft, and a lower rotating shaft. The upper rotating shaft and the lower rotating shaft are located at both ends of the longitudinal shaft. The upper rotating shaft is rotatably connected to the upper movable circular groove, and the lower rotating shaft is rotatably connected to the lower movable circular groove.

[0014] The energy-absorbing mechanism is fixedly connected to the concrete base;

[0015] The angle between the horizontal center line of the upper movable circular groove and the longitudinal axis ranges from 270° to 360°, and the angle between the horizontal center line of the lower movable circular groove and the longitudinal axis ranges from 90° to 180°. The angle between the longitudinal axis and the horizontal center line is an amplified angle α.

[0016] When the upper rotating shaft is located in the lowest upper movable circular slot and the lower rotating shaft is located in the highest lower movable circular slot, the magnification angle α is the minimum magnification angle α. min When the upper rotating shaft is located in the uppermost movable circular groove and the lower rotating shaft is located in the lowermost movable circular groove, the magnification angle α is the maximum magnification angle α.max The magnification angle α includes the combination of the number of upper movable circular groove groups multiplied by the number of lower movable circular groove groups. The magnification angle α is less than or equal to 45°. min ≤α≤α max The temperature changes continuously within the range of ≤90t.

[0017] As a further improvement to the technical solution of the present invention, the trolley body includes several counterweight bins and connecting parts, and the counterweight bins are connected end to end through the connecting parts.

[0018] As a further improvement to the technical solution of the present invention, the counterweight compartment includes an outer compartment wall, an inner partition and a counterweight block. The outer compartment wall and the inner partition are fixedly connected to form a compartment, and the counterweight block is placed in the compartment.

[0019] As a further improvement to the technical solution of the present invention, the coccyx includes transverse ribs and vertical ribs, the transverse ribs are fixedly connected to the vertical ribs, the vertical ribs are connected to the counterweight chamber, and the transverse ribs are connected to the energy absorption mechanism.

[0020] The coccyx is E-shaped.

[0021] As a further improvement to the technical solution of the present invention, it also includes a running groove, and the counterweight bin is further provided with running wheels, the running wheels being tactilely connected to the running groove;

[0022] The running groove is U-shaped.

[0023] As a further improvement to the technical solution of the present invention, the energy absorption mechanism includes several elastic elements, a damping fluid, a piston top plate, a buffer pad, and a support body. The damping fluid and several elastic elements are all located in the support body. The piston top plate is slidably disposed at the opening of the support body. The two ends of the elastic elements are respectively abutted and connected to the piston top plate and the support body. The buffer pad is fixedly connected to the piston top plate. The end of the buffer pad facing away from the piston top plate abuts and cooperates with the tail cone.

[0024] As a further improvement to the technical solution of the present invention, the energy absorption mechanism further includes a wedge-shaped base, which is fixedly connected to the support body and to the concrete base.

[0025] The wedge-shaped base has a trapezoidal shape that is narrower at the top and wider at the bottom.

[0026] As a further improvement to the technical solution of the present invention, the connecting seat is a sleeve, and the sleeve is fitted onto the connecting steel pipe.

[0027] As a further improvement to the technical solution of the present invention, both the upper movable circular groove and the lower movable circular groove are provided with openings, and the openings are arranged in opposite directions.

[0028] As a further improvement to the technical solution of the present invention, the connector includes a series substrate and a positioning pin. Each end of the series substrate is provided with an opening, and the positioning pin passes through the opening and connects to the counterweight chamber.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] In the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention, the transmission mechanism connects the sleeper base and the counterweight trolley, the counterweight trolley is connected to the energy absorption mechanism, seven sets of upper movable circular grooves connected to the upper rotating shaft are set on the sleeper base, and seven sets of lower movable circular grooves connected to the lower rotating shaft are set on the counterweight trolley. The rotating shaft and the horizontal center line form an amplification angle α, which includes 49 combinations. The counterweight M of the counterweight trolley, if there are enough sets of upper and lower movable circular grooves, the amplification angle α can be 45°≤α min ≤α≤α max The stepless vibration reduction range is ≤90°. When graded vibration reduction of the track bed is required, only the amplification angle α and the counterweight M need to be adjusted to achieve full coverage of 49 levels of vibration reduction for the trapezoidal sleeper track bed. This meets the coverage of three levels of vibration reduction: medium, high, and special. This not only reduces production and construction costs but also better ensures the uniformity of track structure stiffness along the track direction. This stepless vibration reduction gain device for sleeper track beds based on the angle amplification principle has the characteristic of achieving stepless vibration reduction. Attached Figure Description

[0031] The technology of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0032] Figure 1 This is a schematic diagram of the structure of the sleeper track bed stepless vibration reduction gain device based on the angle amplification principle of the present invention;

[0033] Figure 2 This is a cross-sectional schematic diagram of the sleeper track bed stepless vibration reduction gain device based on the angle amplification principle of the present invention;

[0034] Figure 3 This is a schematic diagram of the longitudinal section of the sleeper track bed stepless vibration reduction gain device based on the angle amplification principle of the present invention;

[0035] Figure 4 This is a cross-sectional schematic diagram of the sleeper base in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention;

[0036] Figure 5 This is a schematic diagram of the transmission mechanism in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention;

[0037] Figure 6This is a schematic diagram of the transmission mechanism in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention;

[0038] Figure 7 This is a schematic diagram of the trolley body in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention.

[0039] Figure 8 This is a schematic diagram of the counterweight compartment in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention;

[0040] Figure 9 This is a schematic diagram of the tail cone structure in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention;

[0041] Figure 10 This is a schematic diagram of the traveling vehicle and the running track in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention;

[0042] Figure 11 This is a cross-sectional schematic diagram of the energy absorption mechanism in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention;

[0043] Figure 12 This is a schematic diagram of the connection angle in the sleeper track bed stepless vibration reduction gain device based on the angle amplification principle of the present invention;

[0044] Figure 13 This is a schematic diagram of the mechanical principle in equilibrium state of the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of the present invention.

[0045] Figure 14 This is a schematic diagram of the mechanical principle under loading in the sleeper track bed stepless vibration reduction gain device based on the angle amplification principle of the present invention;

[0046] Figure 15 This is a measured wheel-rail force spectrum diagram of the sleeper track bed stepless vibration reduction gain device based on the angle amplification principle of the present invention;

[0047] Figure 16 This is a comparison diagram of the tunnel wall acceleration levels with and without the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of this invention;

[0048] Figure 17 This is a comparison diagram of the tunnel wall acceleration levels under different magnification angles α in the sleeper track bed stepless vibration reduction gain device based on the angle magnification principle of this invention;

[0049] Figure 18 This is a comparison diagram of the tunnel wall acceleration levels under different counterweights M in the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle of this invention.

[0050] In the picture:

[0051] 1. Sleeper base; 11. Connecting seat; 12. Upper stepless limit groove; 13. Upper movable circular groove;

[0052] 2. Transmission mechanism; 21. Upper rotating shaft; 22. Longitudinal shaft; 23. Lower rotating shaft;

[0053] 3. Counterweight trolley; 31. Lower stepless limit groove; 311. Lower movable circular groove; 32. Trolley body; 321. Counterweight compartment; 3211. Outer compartment wall; 3212. Inner partition; 3213. Compartment; 3214. Traveling wheels; 322. Connecting parts; 33. Tail cone; 331. Horizontal rib; 332. Vertical rib;

[0054] 4. Energy absorption mechanism; 41. Elastic component; 42. Damping fluid; 43. Piston top plate; 44. Buffer pad; 45. Support body; 46. Wedge-shaped base;

[0055] 5. Running track; 6. Connecting steel pipe. Detailed Implementation

[0056] The following will provide a clear and complete description of the concept, specific structure, and technical effects of the present invention in conjunction with embodiments and accompanying drawings, so as to fully understand the purpose, solution, and effects of the present invention. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The same reference numerals used throughout the accompanying drawings indicate the same or similar parts.

[0057] It should be noted that, unless otherwise specified, when a feature is referred to as "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or indirectly fixed or connected to the other feature. Furthermore, the descriptions of "up," "down," "left," and "right" used in this invention are only relative to the relative positional relationships of the various components of the invention in the accompanying drawings.

[0058] Reference Figures 1 to 18 A stepless vibration reduction and gain device for railway sleeper track bed based on the principle of angle amplification, comprising a sleeper base 1, a transmission mechanism 2, a counterweight trolley 3, and an energy absorption mechanism 4;

[0059] The transmission mechanism 2 connects the sleeper base 1 and the counterweight trolley 3. The counterweight trolley 3 is connected to the energy absorption mechanism 4. Seven sets of upper movable circular grooves 13 connected to the upper rotating shaft 21 are set on the sleeper base 1. Seven sets of lower movable circular grooves 311 connected to the lower rotating shaft 23 are set on the counterweight trolley. The rotating shaft and the horizontal center line form an amplification angle α, which includes 49 combinations. The counterweight M of the counterweight trolley 3, if there are enough combinations of upper movable circular grooves 13 and lower movable circular grooves 311, the amplification angle α can be 45°≤α min ≤α≤α maxThe vibration reduction is stepless within ≤90°. When graded vibration reduction of the track bed is required, only the amplification angle α and the counterweight M need to be adjusted to achieve full coverage of 49 levels of vibration reduction for the trapezoidal sleeper track bed. This meets the coverage of three levels of vibration reduction: medium, high, and special. This not only reduces production and construction costs but also better ensures the uniformity of track structure stiffness along the track direction. This stepless vibration reduction gain device for sleeper track beds based on the angle amplification principle has the characteristic of achieving stepless vibration reduction. Adding this device to the track can multiply the equivalent dynamic mass of the system, thereby reducing the system's natural frequency and improving the vibration reduction and isolation performance of the trapezoidal sleeper, while also offering the advantage of lightweight design.

[0060] In one embodiment, refer to Figures 4-7 As shown, the vibration reduction and enhancement device is located between two trapezoidal sleepers and connected by a connecting steel pipe 6. The sleeper base 1 includes a connecting seat 11 and an upper stepless limiting groove 12. The connecting seat 11 is connected to the connecting steel pipe 6, and the upper stepless limiting groove 12 includes several upper movable circular grooves 13. The connecting seat 11 is a sleeve, which is fitted onto the connecting steel pipe 6. Preferably, the sleeve is a U-shaped sleeve, and its main function is to fix the connecting steel pipe 6 of the trapezoidal sleeper to the sleeper base 1. The upper stepless limiting groove 12 includes a base plate and upper movable circular grooves 13. The back of the base plate is smooth and connected to the U-shaped sleeve. There are seven movable circular grooves in total (the specific number can be adjusted according to actual engineering needs) and they are embedded in the base plate.

[0061] In one embodiment, refer to Figures 7-9 As shown, the counterweight trolley 3 includes a lower stepless limiting groove 31, a trolley body 32, and a tail cone 33. The limiting groove and the tail cone 33 are located at both ends of the trolley body 32. The lower stepless limiting groove 31 includes several lower movable circular grooves 311. The tail cone 33 is connected to the energy absorption mechanism 4. The tail cone 33 includes horizontal ribs 331 and vertical ribs 332. The horizontal ribs 331 and vertical ribs 332 are fixedly connected. The vertical ribs 332 are connected to the counterweight chamber 321. The horizontal ribs 331 are connected to the energy absorption mechanism 4. The tail cone 33 is E-shaped. To ensure that the energy absorption base is subjected to uniform force, three horizontal ribs 331 are provided and are distributed at equal intervals from top to bottom. The vertical ribs 332 pass through and connect the three horizontal ribs 331.

[0062] In one embodiment, both the upper movable circular groove 13 and the lower movable circular groove 311 are provided with openings, and the opening directions are arranged opposite to each other.

[0063] In one embodiment, the trolley body 32 includes several counterweight compartments 321 and connecting members 322, with the counterweight compartments 321 connected end-to-end via the connecting members 322. Each counterweight compartment 321 includes an outer wall 3211, an inner partition 3212, and counterweight blocks. The outer wall 3211 and the inner partition 3212 are fixedly connected to form a cell 3213 (the specific number can be adjusted according to actual project requirements), and the counterweight blocks are placed within the cell 3213. The connecting member 322 includes a series base plate and a positioning pin. Each end of the series base plate has an opening, and the positioning pin passes through the opening and connects to the counterweight compartment 321. The counterweight compartments 321 are designed to standard dimensions and can be modularly connected or disassembled according to counterweight requirements. The counterweight compartments 321 are configured as multi-chamber cell 3213 structures, and a certain number of standard counterweight blocks can be placed within each cell 3213 as needed, thereby achieving precise adjustment of the system counterweight.

[0064] In one embodiment, refer to Figure 10 As shown, the vibration damping and gain device also includes a running groove 5, and the counterweight bin 321 is also equipped with running wheels 3214, which are rolledly connected to the running groove 5. The running groove 5 is U-shaped, and its width is slightly larger than that of the running wheels 3214. It is recommended that the bottom of the groove be made of hardened smooth metal or ceramic material to minimize frictional resistance. For existing lines, the base of the drainage ditch can be used directly and smoothed. The running wheels 3214 are located at the bottom of the counterweight bin 321, and each counterweight bin 321 is equipped with 4 running wheels 3214.

[0065] In one embodiment, refer to Figures 5-6 As shown, the transmission mechanism 2 includes an upper rotating shaft 21, a longitudinal shaft 22 and a lower rotating shaft 23. The upper rotating shaft 21 and the lower rotating shaft 23 are located at both ends of the longitudinal shaft 22. The upper rotating shaft 21 is rotatably connected to the upper movable circular groove 13, and the lower rotating shaft 23 is rotatably connected to the lower movable circular groove 311. Preferably, the longitudinal shaft 22 has three shafts.

[0066] In one embodiment, refer to Figure 12 As shown, the angle between the horizontal center line of the upper movable circular groove 13 and the axis of the vertical axis 22 ranges from 270° to 360°, and the angle between the horizontal center line of the lower movable circular groove 311 and the axis of the vertical axis 22 ranges from 90° to 180°. The angle between the axis of the vertical axis 22 and the horizontal center line is the magnification angle α. When the upper rotating shaft 21 is located in the lowermost upper movable circular groove 13 and the lower rotating shaft 23 is located in the uppermost lower movable circular groove 311, the magnification angle α is the minimum magnification angle α. min When the upper rotating shaft 21 is located in the uppermost movable circular groove 13 and the lower rotating shaft 23 is located in the lowermost movable circular groove 311, the magnification angle α is the maximum magnification angle α. max The magnification angle α includes a combination of 13 sets of upper movable circular grooves and 311 sets of lower movable circular grooves. The magnification angle α is less than or equal to 45°. min ≤α≤α max There is no step change within ≤90°.

[0067] In one embodiment, refer to Figure 11 As shown, the energy-absorbing mechanism 4 is fixedly connected to the concrete base. The energy-absorbing mechanism 4 includes several elastic elements 41, damping fluid 42, piston top plate 43, buffer pad 44, support body 45, and wedge-shaped base 46. The damping fluid 42 and several elastic elements 41 are all located inside the support body 45. The piston top plate 43 is slidably disposed at the opening of the support body 45. The two ends of the elastic elements 41 are respectively connected to the piston top plate 43 and the support body 45. The buffer pad 44 is fixedly connected to the piston top plate 43, and the end of the buffer pad 44 facing away from the piston top plate 43 abuts against the tail cone 33. The wedge-shaped base 46 is fixedly connected to the support body 45 and the concrete base. The wedge-shaped base 46 is trapezoidal in shape, narrower at the top and wider at the bottom. Preferably, the elastic elements 41 are rubber springs, and the rubber springs are arranged in a "5×5" pattern (the specific number and arrangement can be adjusted according to actual engineering requirements). Each device has an energy-absorbing base at the rear, which contains a spring and damping fluid 42, and can effectively absorb the vibration energy from the upper track system.

[0068] In one embodiment, refer to Figures 13-14 As shown, according to the mechanical principle of this invention, when the device is in equilibrium, the dynamic displacements of both the sleeper base 1 and the counterweight trolley 3 are 0, and the kinetic energy of the device is 0. When the device is under load (when a train passes), the dynamic displacements of the sleeper base 1 and the counterweight trolley 3 are δ1 and δ2 respectively, and the kinetic energy of the device is:

[0069]

[0070] In the formula, ξ is the amplification factor of the angle and ξ = tanα (α ≥ 45° is recommended). Therefore, the equivalent dynamic mass of the oscillator is amplified by a factor of ξ. 2 The number of times (increased from M to ξ) 2 M), and at the same time, due to the equivalent oscillator ξ 2 M and the matrix motion laws are completely consistent, so M can be considered as part of the matrix, thus increasing the equivalent dynamic mass of the matrix from M0 to (M0 + ξ). 2 This reduces the system's natural frequency (M), thereby improving the vibration reduction effect.

[0071] In one embodiment, the model is simulated and verified by establishing a finite-length trapezoidal sleeper track-tunnel-soil dynamic model. In the model: the rail, trapezoidal sleeper, and concrete base are simulated as Timoshenko beam elements; the tunnel is simulated as a cylindrical thin shell; the fasteners, sleeper damping pads, and soil are simulated as spring-damping elements; the applied load is the measured wheel-rail force spectrum of a subway line in southern China (refer to...). Figure 15 As shown in the figure, the x-axis represents the frequency, and the y-axis represents the wheel-rail force.

[0072] In one embodiment, refer to Figure 16 As shown, the tunnel vibration acceleration levels are compared with and without this device. The x-axis represents the center frequency of one-third octave band, and the y-axis represents the acceleration level. Circles indicate the absence of the device, and boxes indicate the presence of the device. After adding this system (α = 67°, ξ = tanα = 2.4, M = 27 kg), the tunnel wall vibration acceleration levels decreased to some extent in the 25–160 Hz frequency range, with a reduction of approximately 4 dB at 100 Hz, indicating a significant vibration reduction effect.

[0073] In one embodiment, refer to Figure 17 As shown, the tunnel vibration acceleration levels are compared at different angles. The x-axis represents the center frequency of one-third octave band, and the y-axis represents the acceleration level. In this device, as ξ increases (M = 27 kg remains constant), the tunnel wall vibration acceleration level gradually decreases in the 20-63 Hz frequency band, and the vibration reduction capability increases exponentially. That is, the larger the amplification angle α, the more obvious the vibration reduction effect.

[0074] In one embodiment, refer to Figure 18 As shown, the tunnel vibration acceleration levels are compared under different counterweights. The x-axis represents the center frequency of one-third octave band, and the y-axis represents the acceleration level. In this device, as M increases (α = 67°, ξ = tanα = 2.4 remains unchanged), the tunnel wall vibration acceleration level gradually decreases in the 25-160Hz frequency band, indicating that the vibration reduction effect is steadily improved.

[0075] In one embodiment, in newly constructed lines, there is no need to adjust the stiffness of the rubber pads under the sleepers or the mass of the sleeper blocks. Simply install the device of this invention on a standard trapezoidal sleeper track bed and adjust the magnification angle α and the counterweight M to achieve the amplification of the additional mass kinetic energy tan ... 2 The α-fold increase in vibration reduction allows trapezoidal sleeper track beds to achieve three levels of vibration reduction: moderate, high, and special. This not only reduces production and construction costs but also better ensures the uniformity of track structure stiffness along the track direction. In existing lines, there is no need to replace the rubber pads under the sleepers; simply installing the device on the existing trapezoidal sleeper track bed, along with the lever ratio λ and counterweight M, can restore or even improve the original vibration reduction performance of the trapezoidal sleeper track bed. This offers multiple advantages, including simple construction procedures, short construction period, no impact on operation, and low cost. Adding the vibration reduction gain device of this invention to the track can multiply the equivalent dynamic mass of the system, thereby reducing the system's natural frequency and improving the vibration isolation performance of the trapezoidal sleepers, offering a lightweight advantage.

[0076] Other aspects of the sleeper track bed stepless vibration reduction and gain device based on the angle amplification principle described in this invention are available in the prior art and will not be repeated here.

[0077] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

Claims

1. A stepless vibration reduction and gain device for railway sleeper track bed based on the principle of angle amplification, located between two trapezoidal sleepers and connected by a connecting steel pipe, characterized in that, include: Sleeper base, transmission mechanism, counterweight trolley, and energy absorption mechanism; The sleeper base includes a connecting seat and an upper stepless limiting groove. The connecting seat is connected to the connecting steel pipe, and the upper stepless limiting groove includes several upper movable circular grooves. The counterweight trolley includes a lower stepless limiting groove, a trolley body, and a tail cone. The limiting groove and the tail cone are located at both ends of the trolley body. The lower stepless limiting groove includes several lower movable circular grooves. The tail cone is connected to the energy absorption mechanism. The transmission mechanism includes an upper rotating shaft, a longitudinal shaft, and a lower rotating shaft. The upper rotating shaft and the lower rotating shaft are located at both ends of the longitudinal shaft. The upper rotating shaft is rotatably connected to the upper movable circular groove, and the lower rotating shaft is rotatably connected to the lower movable circular groove. The energy-absorbing mechanism is fixedly connected to the concrete base; The angle between the horizontal center line of the upper movable circular groove and the longitudinal axis ranges from 270° to 360°, and the angle between the horizontal center line of the lower movable circular groove and the longitudinal axis ranges from 90° to 180°. The angle between the longitudinal axis and the horizontal center line is an amplified angle α. When the upper rotating shaft is located in the lowest upper movable circular slot and the lower rotating shaft is located in the highest lower movable circular slot, the magnification angle α is the minimum magnification angle α. min When the upper rotating shaft is located in the uppermost movable circular groove and the lower rotating shaft is located in the lowermost movable circular groove, the magnification angle α is the maximum magnification angle α. max The magnification angle α includes the combination of the number of upper movable circular groove groups multiplied by the number of lower movable circular groove groups. The magnification angle α is less than or equal to 45°. min ≤α≤α max There is no step change within ≤90°.

2. The stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 1, characterized in that, The trolley body includes several counterweight compartments and connecting parts, and the counterweight compartments are connected end to end through the connecting parts.

3. The stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 2, characterized in that, The counterweight compartment includes an outer compartment wall, an inner partition, and a counterweight block. The outer compartment wall and the inner partition are fixedly connected to form a compartment, and the counterweight block is placed in the compartment.

4. The stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 2, characterized in that, The coccyx includes transverse ribs and vertical ribs, the transverse ribs are fixedly connected to the vertical ribs, the vertical ribs are connected to the counterweight chamber, and the transverse ribs are connected to the energy absorption mechanism; The coccyx is E-shaped.

5. A stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 2, characterized in that, It also includes a travel groove, and the counterweight compartment is further provided with travel wheels, which are tactilely connected to the travel groove; The running groove is U-shaped.

6. The stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 1, characterized in that, The energy-absorbing mechanism includes several elastic elements, a damping fluid, a piston top plate, a buffer pad, and a support body. The damping fluid and the elastic elements are all located within the support body. The piston top plate is slidably disposed at the opening of the support body. The two ends of the elastic elements are respectively abutted and connected to the piston top plate and the support body. The buffer pad is fixedly connected to the piston top plate, and the end of the buffer pad facing away from the piston top plate abuts and engages with the tail cone.

7. A stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 6, characterized in that, The energy-absorbing mechanism also includes a wedge-shaped base, which is fixedly connected to the support body and to the concrete base; The wedge-shaped base has a trapezoidal shape that is narrower at the top and wider at the bottom.

8. The stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 1, characterized in that, The connecting seat is a sleeve, which is fitted onto the connecting steel pipe.

9. A stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 1, characterized in that, Both the upper movable circular groove and the lower movable circular groove are provided with openings, and the openings are arranged in opposite directions.

10. A stepless vibration reduction gain device for railway sleeper track bed based on the angle amplification principle according to claim 2, characterized in that, The connector includes a series base plate and a positioning pin. Each end of the series base plate has an opening, and the positioning pin passes through the opening and connects to the counterweight chamber.

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