A load-reducing sound barrier for highways and a load-reducing adjustment method

Abstract

This invention discloses a highway load-reducing sound barrier and a load-reducing adjustment method. The sound barrier includes an upper screen panel, a lower screen panel, a load-reducing mechanism, and steel columns. Multiple load-reducing mechanisms are arranged laterally at equal intervals between the upper and lower screen panels. Each load-reducing mechanism consists of an impeller movably connected between the upper and lower screen panels and multiple arc-shaped blades mounted on the impeller. By incorporating a load-reducing structure into the sound barrier, this invention enables the sound barrier to maintain high safety even under strong winds. Furthermore, this load-reducing structure can achieve multi-directional energy capture, effectively capturing wind energy from different wind directions and converting it into the mechanical energy of the impeller, significantly improving the safety of the sound barrier.

Description

Technical Field

[0001] This invention relates to the field of noise reduction technology, specifically to a highway load-reducing sound barrier and a load-reducing adjustment method. Background Technology

[0002] Urban rail transit, with its characteristics of "large passenger capacity, low pollution, convenience, speed, safety and comfort", has become an effective mode of transportation to solve urban congestion. However, while rail transit brings convenience to society, it also causes environmental noise pollution problems that cannot be ignored in people's living and working environment. In order to effectively prevent and control railway environmental noise pollution, the railway department often sets up sound barriers of varying heights and different types along the railway line.

[0003] However, most of the sound barriers currently in use are non-ventilated. When the sound barrier is attacked by crosswinds, the wind load will inevitably be transferred downwards, which will affect its stability and durability, especially in bridge areas. In fact, the increased load on the bridge may even affect its safety and service life. Coastal areas are often affected by monsoons and typhoons with high frequency, wind speed and wind pressure, which is also a challenge for elevated bridges with sound barriers. To address the aerodynamic pressure problem of sound barriers, a ventilated load-reducing sound barrier needs to be designed to solve the above problems. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a highway load-reducing sound barrier and a load-reducing adjustment method, aiming to solve the problems in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a highway load-reducing sound barrier, comprising an upper screen plate, a lower screen plate, a load-reducing mechanism, and steel columns, wherein multiple load-reducing mechanisms are arranged laterally at equal intervals between the upper screen plate and the lower screen plate; the load-reducing mechanism consists of an impeller movably connected between the upper screen plate and the lower screen plate and multiple arc-shaped blades arranged on the impeller.

[0006] Furthermore, the impeller includes a drive shaft, a rotor bearing, an upper base plate, a lower base plate impeller, and arc-shaped blades. The upper base plate and the lower base plate are connected by the drive shaft, and a rotor bearing is provided at the connection between the upper base plate, the lower base plate, and the drive shaft. An impeller is provided on the drive shaft, and several arc-shaped blades are provided on one side of the impeller. The top of the upper base plate is connected to the bottom of the upper screen plate, and the lower base plate is connected to the top of the lower screen plate.

[0007] Furthermore, multiple clamping plates are installed at the same positions on the bottom of the upper base plate and the top of the lower base plate, and the arc-shaped blades are mounted on one side of the impeller via the clamping plates.

[0008] Furthermore, the curved blades are arranged on the concave side of the impeller and are equidistant, with the size of the curved blades being one-quarter of the size of the impeller.

[0009] Furthermore, the upper and lower screen panels are connected and fixed on both sides by steel columns.

[0010] Furthermore, a solar panel is installed on the top of the upper screen panel.

[0011] Furthermore, the upper and lower screen panels are made of aluminum alloy shells, and porous sound-absorbing material is filled inside the aluminum alloy shells; cavities are set inside the upper and lower screen panels, and louvers are set on the outside of the upper and lower screen panels.

[0012] Furthermore, magnetic blocks are provided on the upper and lower substrate plates.

[0013] A load reduction adjustment method is applied to a highway load reduction type sound barrier, comprising the following steps: adjusting the structural parameters of the load reduction mechanism to achieve different load reduction rates;

[0014] The structural parameters affecting the load reduction mechanism include the number of arc-shaped blades. Height-to-diameter ratio overlap rate Calculate the energy capture efficiency of the unloading mechanism. Energy capture efficiency is usually expressed using the power factor. Torque coefficient and tip speed ratio Represented as:

[0015] ;

[0016] ;

[0017] ;

[0018] In the formula, For fluid density; It is the rotational torque; Energy captured by the load shearing mechanism; The theoretical energy possessed by the region swept by the unloading mechanism; Air speed; The rotation angle of the unloading mechanism; The impeller's rotational speed; The diameter of the impeller; The diameter of the curved blade; This refers to the gap between two adjacent curved blades; This refers to the impeller height.

[0019] Furthermore, when the wind energy threshold is met, the load shearing mechanism is connected to the permanent magnet synchronous generator.

[0020] Compared with existing technologies, the present invention has the following advantages:

[0021] (1) By setting a load-reducing structure on the sound barrier, the present invention can enable the sound barrier to maintain a high level of safety under strong wind. At the same time, the load-reducing structure can achieve multi-directional energy capture, that is, it can capture wind energy in different wind directions and convert wind energy into mechanical energy of the impeller, thus greatly improving the safety of the sound barrier.

[0022] (2) This invention achieves wind pressure reduction requirements in different regions by adjusting the structural parameters of the load reduction structure. At the same time, the blades of the load reduction structure have the advantages of simple structure, low cost, easy processing, low operating speed and not easy cavitation. In actual use, the sealing requirements are low, it is easy to maintain and care for, and the service life is long.

[0023] (3) This invention adds arc-shaped blades to the impeller. Based on the changes in the thickness, number and spacing of the arc-shaped blades, the aerodynamic characteristics are analyzed by computational fluid dynamics simulation. Adding two arc-shaped blades increases the energy capture efficiency by 17% compared to traditional blades. The structure design is simple and the performance is greatly improved. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the sound barrier of the present invention.

[0025] Figure 2 This is a schematic diagram of the planar structure of the sound barrier of the present invention.

[0026] Figure 3 This is a three-dimensional structural diagram of the load reduction mechanism of the present invention.

[0027] Figure 4 This is a schematic diagram of the internal structure of the load reduction mechanism of the present invention.

[0028] Figure 5 This is a schematic diagram of the planar structure of the load reduction mechanism of the present invention.

[0029] Figure 6 This is a schematic diagram of the card plate structure of the present invention.

[0030] Figure 7 This is a diagram showing the power coefficient of various load-reducing structures under different numbers of arc-shaped blades according to the present invention.

[0031] In the diagram, 1. drive shaft; 2. rotor bearing; 3. upper base plate; 4. lower base plate; 5. impeller; 6. arc blade; 7. solar panel; 8. steel column; 9. upper screen plate; 10. load reduction mechanism; 11. lower screen plate; 12. clamping plate. Detailed Implementation

[0032] like Figure 1-Figure 2 As shown, the present invention provides a technical solution: a highway load-reducing sound barrier, comprising an upper screen plate 9, a lower screen plate 11, a load-reducing mechanism 10, and steel columns 8. Multiple load-reducing mechanisms 10 are arranged laterally at equal intervals between the upper screen plate 9 and the lower screen plate 11. Each load-reducing mechanism 10 consists of an impeller 5 movably connected between the upper screen plate 9 and the lower screen plate 11, and multiple arc-shaped blades 6 mounted on the impeller 5. The load-reducing mechanism 10 can effectively utilize and convert strong crosswinds and train winds for ventilation and pressure relief, thereby improving the service life of the sound barrier.

[0033] like Figures 3-5 As shown, the impeller 5 includes a drive shaft 1, a rotor bearing 2, an upper base plate 3, a lower base plate 4, an impeller 5, and arc-shaped blades 6. The upper base plate 3 and the lower base plate 4 are connected by the drive shaft 1, and a rotor bearing 2 is provided at the connection between the upper base plate 3, the lower base plate 4, and the drive shaft 1. The impeller 5 is provided on the drive shaft 1, and several arc-shaped blades 6 are provided on one side of the impeller 5. The top of the upper base plate 3 is connected to the bottom of the upper screen plate 9, and the lower base plate 4 is connected to the top of the lower screen plate 11.

[0034] like Figure 6 As shown, multiple clamping plates 12 are provided at the same position at the bottom of the upper base plate 3 and the top of the lower base plate 4, and the arc-shaped blades 6 are set on one side of the impeller 5 through the clamping plates 12.

[0035] Among them, the arc-shaped blades 6 are arranged on the concave side of the impeller 5 and are equidistant. The size of the arc-shaped blades 6 is one-quarter of that of the impeller 5.

[0036] Among them, the impeller 5 and the arc-shaped blade 6 are made of glass fiber reinforced plastic (GRP), and the upper substrate plate 3 and the lower substrate plate 4 are made of epoxy resin. The impeller 5 and the arc-shaped blade 6 made of glass fiber reinforced plastic (GRP) have low resistance and are easy to drive, with good lightweight and durability, and good mechanical properties.

[0037] The upper screen panel 9 and the lower screen panel 11 are connected and fixed on both sides by steel columns 8.

[0038] Among them, the top of the upper screen panel 9 is equipped with a solar panel 7; the solar panel 7, through its own bending design, can not only increase the noise reduction effect of the sound barrier, but also generate electricity using solar energy, converting solar energy into electrical energy for storage, and the stored electrical energy can power the nearby street lights; the solar panel 7 can be set as Y-shaped, T-shaped, etc., according to needs.

[0039] The upper screen panel 9 and the lower screen panel 11 are made of aluminum alloy shells, and porous sound-absorbing material is filled inside the aluminum alloy shells.

[0040] The upper screen plate 9 and the lower screen plate 11 are provided with cavities inside, and louvers are provided on the outside of the upper screen plate 9 and the lower screen plate 11.

[0041] The upper base plate 3 and the lower base plate 4 are equipped with magnetic blocks. These magnetic blocks prevent the impeller 5 inside the load reduction mechanism 10 from rotating in the absence of wind, thus ensuring the airtightness of the sound barrier. Furthermore, the upper base plate 3 and the lower base plate 4 can block the fluid flowing through the edge of the arc-shaped blade 6, helping to prevent fluid leakage from the concave surface of the impeller 5. This increases the pressure generated on the impeller 5 blade surface, improves the drag difference formed on the impeller 5 surface, and further enhances the lift generated by the Magnus effect when the object is rotating.

[0042] A load reduction adjustment method is applied to a highway load reduction type sound barrier, comprising the following steps: adjusting the structural parameters of the load reduction mechanism 10 to achieve different load reduction rates.

[0043] Based on the parameters affecting the energy capture coefficient of the load shearing mechanism 10, i.e., the structural parameters of the load shearing mechanism 10 (number of 6 arc-shaped blades) The number of vertical layers of the load-reducing mechanism 10, whether the load-reducing mechanism 10 has a base plate, and its height-to-diameter ratio. overlap rate (e.g., curved blades 6), calculate the energy capture efficiency of the unloading mechanism 10. Energy capture efficiency is usually calculated using the power factor. Torque coefficient and tip speed ratio express:

[0044] (1);

[0045] (2);

[0046] (3);

[0047] In the formula, The density is the fluid density, typically taken as the air density; It is the rotational torque; Energy captured by the load reduction mechanism 10; The theoretical energy possessed by the region swept by the unloading mechanism 10; Air speed; The rotation angle of the unloading mechanism 10; The rotational speed of impeller 5; The diameter of impeller 5; The diameter of the arc-shaped blade 6; The gap between two adjacent arc-shaped blades 6; The impeller height is 5.

[0048] In cases where wind energy is abundant, the load reduction mechanism 10 can be connected to the permanent magnet synchronous generator, and in conjunction with the solar panel 7, the power generation efficiency can be improved.

[0049] The tip speed ratio (TSR) is the ratio of the linear velocity at the tip of the curved blade 6 to the wind speed. Using this as the independent variable and combining equations (1), (2), and (3), the structural parameters of the load shearing mechanism 10 are analyzed in computational fluid dynamics (CFD) software. It can be seen that the upper base plate 3 and the lower base plate 4 act as a barrier to the fluid flowing through the edge of the impeller 5, which helps to prevent the fluid from leaking out of the concave surface of the impeller 5, thereby increasing the pressure generated on the impeller 5 and improving the resistance difference formed on the surface of the impeller 5. At the same time, the upper base plate 3 and the lower base plate 4 also act as a barrier to the fluid flowing through the edge of the impeller 5. The best effect is achieved when the diameter of plate 4 is 1.1 times the diameter of impeller 5. Under both constant impeller 5 diameter and swept area conditions, a height-to-diameter ratio of 6 is good. However, considering the overall size of the sound barrier and meeting noise reduction requirements, the height-to-diameter ratio should not exceed 7. Two impellers 5 provide optimal performance. Considering the size of the load-reducing mechanism 10, one vertical layer of the load-reducing mechanism 10 can meet the load-reducing requirements. Simulation analysis is performed on different numbers of quarter-sized arc-shaped blades 6 located on one side of impeller 5, such as... Figure 7 As shown, it was found that adding two quarter-sized arc-shaped blades 6 resulted in the best load reduction efficiency for the load reduction mechanism 10.

[0050] 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 highway load-reducing sound barrier, comprising an upper screen panel (9), a lower screen panel (11), a load-reducing mechanism (10), and steel columns (8), characterized in that: Multiple load-reducing mechanisms (10) are arranged horizontally at equal intervals between the upper screen plate (9) and the lower screen plate (11); the load-reducing mechanism (10) consists of an impeller (5) movably connected between the upper screen plate (9) and the lower screen plate (11) and multiple arc-shaped blades (6) arranged on the impeller (5); The impeller (5) includes a drive shaft (1), a rotor bearing (2), an upper base plate (3), a lower base plate (4), an impeller (5), and arc-shaped blades (6). The upper base plate (3) and the lower base plate (4) are connected by the drive shaft (1), and a rotor bearing (2) is provided at the connection between the upper base plate (3), the lower base plate (4), and the drive shaft (1). The impeller (5) is provided on the drive shaft (1), and several arc-shaped blades (6) are provided on one side of the impeller (5). The top of the upper base plate (3) is connected to the bottom of the upper screen plate (9), and the lower base plate (4) is connected to the top of the lower screen plate (11). Multiple clamping plates (12) are provided at the same position at the bottom of the upper base plate (3) and the top of the lower base plate (4). The arc-shaped blade (6) is set on one side of the impeller (5) through the clamping plates (12). The curved blades (6) are arranged on the concave side of the impeller (5) and are equidistant. The size of the curved blades (6) is one-quarter of that of the impeller (5).

2. The highway load-reducing sound barrier according to claim 1, characterized in that: The upper screen plate (9) and the lower screen plate (11) are connected and fixed on both sides by steel columns (8).

3. A highway load-reducing sound barrier according to claim 2, characterized in that: A solar panel (7) is installed on the top of the upper screen panel (9).

4. A highway load-reducing sound barrier according to claim 3, characterized in that: The upper screen plate (9) and the lower screen plate (11) are made of aluminum alloy shells, and porous sound-absorbing material is filled inside the aluminum alloy shells; the upper screen plate (9) and the lower screen plate (11) are provided with cavities inside, and louvers are provided on the outside of the upper screen plate (9) and the lower screen plate (11).

5. A highway load-reducing sound barrier according to claim 4, characterized in that: Magnetic blocks are provided on the upper substrate plate (3) and the lower substrate plate (4).

6. A load reduction adjustment method, applied to a highway load reduction type sound barrier as described in any one of claims 1-5, comprising the following steps: adjusting the structural parameters of the load reduction mechanism (10) to achieve different load reduction rates; The structural parameters affecting the load reduction mechanism (10) include the number of arc-shaped blades (6). Height-to-diameter ratio overlap rate Calculate the energy capture efficiency of the unloading mechanism (10). The energy capture efficiency is usually calculated using the power factor. Torque coefficient and tip speed ratio Represented as: ； ； ； In the formula, For fluid density; It is the rotational torque; Energy captured by the load reduction mechanism (10); The theoretical energy possessed by the region swept by the load reduction mechanism (10); Air speed; The rotation angle of the unloading mechanism (10); The rotational speed of the impeller (5); The diameter of the impeller (5); The diameter of the arc-shaped blade (6); The gap between two adjacent arc-shaped blades (6); The height of the impeller (5) is given.

7. The load reduction adjustment method according to claim 6, characterized in that: When the wind energy threshold is met, the load shedding mechanism (10) is connected to the permanent magnet synchronous generator.

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