CN109868695B - A New Periodic Fastener Structure Based on Hydraulic Viscous Damping - Google Patents

Abstract

The invention provides a novel periodic fastener structure based on hydraulic viscous damping, which is characterized in that: the device comprises a tuning mass buckling elastic strip, a spiral spike, an elastic washer, a nut, a hydraulic viscous damper and a heightening base plate. The invention has simple integral structure and convenient manufacture, can be arranged in rail transit such as high-speed rail, subway and the like, can effectively reduce and absorb the influence on the surrounding environment caused by wheel track vibration caused by the irregularity of the rail, effectively reduce the ground vibration caused by the train in the running process and improve the living environment of residents around the line.

Description

A New Periodic Fastener Structure Based on Hydraulic Viscous Damping

technical field

The invention relates to a fastener system, belonging to the technical field of vibration and noise reduction, in particular to a novel periodic fastener structure based on hydraulic viscous damping.

Background technique

In the existing high-speed rail, subway and other rail transportation vibration control measures, vibration damping fasteners are mostly used to control the impact on the surrounding environment caused by the wheel-rail vibration caused by the track irregularity. The technical standards achieved are limited, and sometimes they cannot be Meeting the existing vibration and noise control standards will increase the vibration of the surrounding environment, and cannot meet the requirements of the technical standards. What needs to be known is that in the existing vibration control measures, the vibration cannot be completely eliminated, and the vibration can only be weakened by this technology until the effect of the vibration is within our allowable range.

For example, by using double-layer nonlinear fasteners, floating rail fasteners and other vibration-absorbing fasteners in subway tunnels, the vibration response of the ground can theoretically be reduced, but sometimes the ground vibration is amplified, especially the floating rail fasteners and Double-layer nonlinear fasteners will shift ground vibrations to low frequencies. The expected vibration reduction effect is often not achieved, and due to the use of vibration reduction fasteners, the vertical stiffness of the fasteners is lower than that of the traditional fasteners, which reduces the strength of the track and leads to the occurrence of rail side grinding and corrugation.

The rail-fastener-sleeper has good periodicity. In solid physics, the periodic structure has the attenuation domain characteristic of elastic waves, that is, the band gap characteristic. When the frequency of the elastic wave falls within the attenuation domain, the propagation of the wave will be greatly attenuated.

The working principle of the clearance viscous damper is that when the damper is impacted by the outside world, the cylinder body and the piston move relative to each other, and the volume on one side of the piston becomes smaller, forcing the viscous damping material to flow through the gap to the side where the volume increases, and the damping material's volume increases. The shear flow generates damping force to dissipate the impact energy, thereby achieving the purpose of buffering. It is hoped that this damper will generate a lot of resistance, which will not only limit the displacement of the rail, but also absorb energy and share the impact force.

Using the band gap property of the periodic structure, a new vibration isolation and noise reduction structure can be designed. Combined with the principle of gap viscous damping, a new type of fastener can be designed. The resistance of the rail can not only limit the displacement of the rail, but also absorb energy and share the impact force. Work on the wave's path to reduce the ground vibration response.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a new type of periodic fastener structure based on hydraulic viscous damping, which can effectively reduce the ground vibration caused by the train during operation and improve the living environment of the residents around the line.

Specifically, the purpose of the present invention is to provide a new type of periodic fastener structure based on hydraulic viscous damping, which is characterized in that: it is characterized in that: it includes a tuned mass withholding spring 1, a screw spike 2, and an elastic washer 3 , Nut 4, hydraulic viscous damper 5, height-adjusting backing plate 6.

Further, it is characterized in that: the tuned mass withholding spring 1 is a new type of spring made of carbon fiber material. Compared with the traditional elastic material, the stiffness and strength of the carbon fiber are due to the traditional elastic material, and the density is only the traditional elastic material. about 1/4 of the strip. In the middle of the tuning quality withholding elastic strip, it is convenient to adjust the quality embedding hole 1-1, and the function of controlling the tuning quality can be achieved by changing the quality of the embedding body 1-2 in the embedding hole. The coordinating mass withholding elastic strip 1 is fixed on the hydraulic viscous damper 5 through the screw spike 2 , the elastic washer 3 and the nut 4 .

Further, it is characterized in that: the tuning quality withholding elastic strip 1 is in contact with the rail waist, the tuning quality withholding elastic strip 1 is subjected to textured treatment on the contact surface of the rail waist, and a W-shaped fold line is arranged on the rough surface 1-1 to increase the The frictional resistance of the contact surface prevents the relative displacement between the tuning mass withholding elastic strip 1 and the rail.

Further, it is characterized in that: the tuning mass crimping spring 1 is provided with an adjusting mass cavity in the middle thereof, and the mechanical model of the whole tuning mass crimping spring is adjusted by the mass M of the embedded body 1-2. Through the simulation calculation, when the mass M of the embedded body 1-2 is changed, different band gap characteristics will appear, and the vibration should be reduced for different requirements.

Further, it is characterized in that: the screw spike 2 is a г-shaped structure, the tuning mass withholding elastic strip 1 can be tightly fixed with the hydraulic viscous damper 5 through the elastic washer 3 and the nut 4 downward, and to the right can make Tuning quality crimping clip 1 tightly fastens the rail.

Further, it is characterized in that: the screw spike 2 comprises a vertical part 2-1, a transverse part 2-2 and a baffle plate 2-3. The vertical portion 2-1 is shown to have threads, so as to fix the tuning mass withholding spring 1 on the hydraulic viscous damper 5 and fix the inner piston 5-3 of the hydraulic viscous damper. The transverse part 2-2 is a pressing device, which can tightly press the tuned mass clip spring 1 by rotating to achieve the purpose of further clipping the rail. When the elastic bar 1 is crimped by the tuning mass through the transverse portion 2-2, the baffle plate 2-3 serves the purpose of crimping the embedded body 1-2.

Further, it is characterized in that: the spring washer 3 has an appropriate stiffness, and in addition to ensuring that the function of the washer can be well met, a certain deformation should also be generated.

V为活塞上方油液体积，ΔV为体积改变量，Δp为压力变化量。进一步的，其特征在于：调高垫板6具有很大的刚度，达到在扣件工作状态下不发生形变。通过控制活塞5-2与液压粘滞阻尼器5内壁之间的间隙为h来控制K。通过油液的剪切流动来消耗冲击的能量。Further, it is characterized in that: the hydraulic viscous damper 5 is a cylindrical structure with an inner diameter of D, and four bolt holes 5-1 are arranged at the bottom of each foot, and the four bolt holes 5-1 are used to fix it on the sleeper. The interior is filled with dimethyl silicone oil 5-2, and its density is ρ, dynamic viscosity μ, and volume elastic coefficient K. The diameter of the built-in piston 5-3 is d, the piston is fixed on the screw spike 2, and the gap between the piston 5-2 and the inner wall of the hydraulic viscous damper 5 is h. The force is transmitted to the hydraulic viscous damper 5 through the tuned mass withholding elastic bar 1, and the bulk elastic modulus of the oil is

V is the volume of oil above the piston, ΔV is the volume change, and Δp is the pressure change. Further, it is characterized in that: the height-adjusting backing plate 6 has great rigidity, so that no deformation occurs under the working state of the fastener. K is controlled by controlling the gap between the piston 5-2 and the inner wall of the hydraulic viscous damper 5 to be h. The energy of the shock is dissipated by the shear flow of the oil.

Description of drawings

Figure 1 is a schematic structural diagram of a new type of periodic fastener based on hydraulic viscous damping of the present invention (along the direction of the rail).

Figure 2 is a schematic structural diagram of a new type of periodic fastener based on hydraulic viscous damping of the present invention (rail lateral).

FIG. 3 is a schematic diagram of the tuning mass withholding elastic bar 1 in FIG. 1 , wherein a is a cross-sectional view, b is a partial side view, and c is a structural view of an embedded body.

FIG. 4a is a schematic view of the screw spike 2 in FIG. 1 .

Figure 4b is a top view of the transverse portion 2-2 of Figure 4a.

FIG. 5 is a schematic diagram of the hydraulic viscous damper 5 in FIG. 1 .

Detailed ways

In order to make the technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

1-5, the purpose of the present invention is to provide a new type of periodic fastener structure based on hydraulic viscous damping, taking a ballastless track as an example, it is characterized in that: Including the tuning quality withholding elastic strip 1, the screw spike 2, the elastic washer 3, the nut 4, the hydraulic viscous damper 5, the height-adjusting backing plate 6.

Among them, one end of the tuning mass withholding elastic strip 1 is in contact with the rail waist of the rail, and the other end is fixed on the hydraulic viscous damper 5 . Wherein, the tuned mass withholding elastic strip 1 is fixed on the rail waist and the hydraulic viscous damper 5 by means of screw spikes 2 and other components.

Preferably, the tuned mass withholding spring 1 is a new type of spring made of carbon fiber material. Compared with the traditional elastic material, the stiffness and strength of the carbon fiber are both due to the traditional spring material, and the density is only 1/1 of that of the traditional spring. 4 or so. In the middle of the tuning quality withholding elastic strip, it is convenient to adjust the quality embedding hole 1-1, and the function of controlling the tuning quality can be achieved by changing the quality of the embedding body 1-2 in the embedding hole. Coordinate quality withholding clips 1.

Preferably, the tuning quality withholding elastic strip 1 is in contact with the rail waist, the tuning quality withholding elastic strip 1 is textured on the contact surface of the rail waist, and a W-shaped fold line is arranged on the rough surface 1-1 to increase the friction of the contact surface resistance, to prevent the relative displacement between the tuning mass withholding elastic strip 1 and the rail.

Preferably, the tuning mass withholding elastic strip 1 is provided with an adjustment mass cavity in the middle thereof, and the mechanical model of the entire tuning mass withholding elastic rod is adjusted by the mass M of the embedded body 1-2. Through the simulation calculation, when the mass M of the embedded body 1-2 is changed, different band gap characteristics will appear, and the vibration should be reduced for different requirements.

Preferably, the screw spike 2 is a г-shaped structure, the tuning mass withholding elastic strip 1 can be tightly fixed with the hydraulic viscous damper 5 through the elastic washer 3 and the nut 4 downwards, and the tuning mass withholding elastic strip can be made upwards. 1 Fasten the rail tightly.

Preferably, the screw spike 2 comprises a vertical part 2-1, a transverse part 2-2 and a baffle plate 2-3, preferably, the angle between the vertical part 2-1 and the transverse part 2-2 is 90 °-100°, more preferably, a slightly obtuse angle of 95 degrees, enables higher compressive strength while saving space. The surface of the vertical portion 2-1 is threaded, so as to fix the tuning mass withholding spring 1 on the hydraulic viscous damper 5, preferably, the vertical portion 2-1 passes through the hydraulic viscous damper 5 And fixed on its bottom, and fixed the piston 5-3 in the hydraulic viscous damper. The transverse part 2-2 is a screw pressing device, the length of the transverse part 2-2 can be adjusted tightly by rotating, and then the elastic bar 1 can be pressed against the tuning mass to achieve the purpose of tightly clasping the rail. When the elastic bar 1 is crimped by the tuning mass through the transverse portion 2-2, the baffle plate 2-3 serves the purpose of crimping the embedded body 1-2. The screw spike 2 is suitable for the 50 and 60 rails commonly used in national railways and subways, and can be adapted to different types of rails by adjusting the length of the transverse portion 2-2.

Preferably, the spring washer 3 has a suitable stiffness, and should be deformed to a certain extent while ensuring that the function of the washer can be well satisfied.

V为活塞上方油液体积，ΔV为体积改变量，Δp为压力变化量。调高垫板6具有很大的刚度，达到在扣件工作状态下不发生形变。通过控制活塞5-2与液压粘滞阻尼器5内壁之间的间隙为h来控制K。通过油液的剪切流动来消耗冲击的能量。Preferably, the hydraulic viscous damper 5 is a cylindrical structure with an inner diameter of D, and four bolt holes 5-1 are arranged at the bottom of each foot, and the four bolt holes 5-1 are used to fix it on the sleeper. The interior is filled with dimethyl silicone oil 5-2, and its density is ρ, dynamic viscosity μ, and volume elastic coefficient K. The diameter of the built-in piston 5-3 is d, the piston is fixed on the screw spike 2, and the gap between the piston 5-2 and the inner wall of the hydraulic viscous damper 5 is h. The force is transmitted to the hydraulic viscous damper 5 through the tuned mass withholding elastic strip 1, and the bulk elastic modulus of the oil is

V is the volume of oil above the piston, ΔV is the volume change, and Δp is the pressure change. The height-adjusting backing plate 6 has great rigidity, so that no deformation occurs in the working state of the fastener. K is controlled by controlling the gap between the piston 5-2 and the inner wall of the hydraulic viscous damper 5 to be h. The energy of the shock is dissipated by the shear flow of the oil.

It should be noted that the above embodiments are also suitable for different track forms, and when the main frequency bands are different, it is only necessary to slightly adjust the embedded body quality M according to requirements.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Changes should all be included within the protection scope of the present invention.

Claims (5)

1. The utility model provides a novel periodic fastener structure based on hydraulic pressure viscous damping, its characterized in that: the device comprises a tuning mass buckling elastic strip, a spiral spike, an elastic washer, a nut, a hydraulic viscous damper and a heightening base plate;

one end of the tuning mass buckling elastic strip is in contact with the rail web of the steel rail, and the other end of the tuning mass buckling elastic strip is fixed on the hydraulic viscous damper; the tuning mass buckling elastic strip is fixed on the hydraulic viscous damper through a spiral spike, an elastic washer and a nut; the height-adjusting tie plate is arranged on the sleeper, and the hydraulic viscous damper is arranged on the height-adjusting tie plate;

the screw spike is a Gamma-shaped structure, and downwards fastens the tuning mass fastening elastic strip and the hydraulic viscous damper, and upwards fastens the tuning mass fastening elastic strip to tightly fasten the steel rail; the spiral spike comprises a vertical part, a transverse part and a baffle plate; the surface of the vertical part is provided with threads so as to fix the tuning mass buckling elastic strip on the hydraulic viscous damper and fix a piston in the hydraulic viscous damper; the transverse part is a pressing device, and can tightly press the tuning mass buckling elastic strip through rotation so as to achieve the purpose of further tightly buckling the steel rail; when the tuning mass is buckled through the transverse part, the baffle plays a role in compressing the embedded body.

2. The novel periodic fastener structure based on hydraulic viscous damping as claimed in claim 1, wherein: the tuned mass buckling elastic strip is a novel elastic strip produced by a carbon fiber material, compared with a traditional elastic material, the rigidity and the strength of the carbon fiber material are superior to those of the traditional elastic strip material, and the mass of the carbon fiber material is only about 1/4 of that of the traditional elastic strip; the middle part of the tuning mass buckling elastic strip is provided with a mass embedding hole convenient to adjust, and the function of controlling the tuning mass is achieved by changing the mass of the device in the embedding hole.

3. The novel periodic fastener structure based on hydraulic viscous damping as claimed in claim 1, wherein: the spring washer has proper rigidity, and certain deformation is generated while the function of the washer is well met.

4. The novel periodic fastener structure based on hydraulic viscous damping as claimed in claim 1, wherein: the hydraulic viscous damper is of a rectangular structure, 4 bolt holes are respectively formed in the bottom of the hydraulic viscous damper through feet, the hydraulic viscous damper is fixed on a sleeper through the 4 bolt holes, and the interior of the hydraulic viscous damper is filled with dimethyl silicon oil.

5. The novel periodic fastener structure based on hydraulic viscous damping as claimed in claim 1, wherein: the heightening base plate has great rigidity, and does not deform under the working state of the fastener structure.

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