Noise reduction sheet for subway wheel and wheel noise reduction mounting assembly
By installing noise reduction sheets composed of fan-shaped alloy plates and auxiliary alloy plates on the subway wheels, the twin effect absorbs vibration force, solving the high cost and speed limit problems of existing subway wheel noise reduction technology, achieving efficient noise reduction effect.
Patent Information
- Application Number
- CN202421798413.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-29
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-07-29
AI Technical Summary
The existing subway wheel noise reduction technology has problems such as high manufacturing and maintenance costs, easy breakage of chip dampers and speed limitations, making it difficult to effectively reduce the vibration and noise of subway wheels.
The noise reduction plate composed of a fan-shaped alloy plate and an auxiliary alloy plate is installed on the subway wheels through riveting, and the twin effect absorbs vibration force to achieve noise reduction effect.
It achieves simple structure, convenient installation, high flexibility, light weight and noise reduction effect of more than 10 decibels, and is suitable for subway vehicles of different speeds.
Smart Images
Figure CN223072223U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of subway wheel auxiliary appliances, and particularly relates to a noise reduction sheet for subway wheels and a wheel noise reduction installation assembly. Background Technique
[0002] Due to the rapid development of urban rail transit, the problems of vibration and noise generated by it cannot be ignored. Urban rail transit, especially subway tracks, inevitably pass through densely populated areas and under important buildings. The vibration and noise generated when the train runs seriously affect people's normal work and life. Among them, structure noise is mainly generated by the vibration generated by the interaction on the surface of subway wheels, and wheel-rail noise is an important reason among the main reasons.
[0003] At present, there are mainly three methods for wheel noise reduction: First, use integral low-noise subway wheels to reduce noise by reducing wheel-rail friction and improving wheel elasticity, but its manufacturing and maintenance costs are relatively high; Second, use a damping sheet wheel noise reduction damper to reduce noise by absorbing the vibration of the wheel, but the sheet type is easy to break; Third, use a wheel noise reduction damping ring to reduce noise through interface damping, and it can only have a better noise reduction effect for subway vehicles with a running speed less than 80 km / h. Therefore, there is a running speed limit for the applicable subway vehicles.
[0004] Based on the defects of the above technologies: There is an urgent need to provide a new noise reduction technology for subway wheels. Content of the Utility Model
[0005] The purpose of the utility model is to provide a noise reduction sheet for subway wheels and a wheel noise reduction installation assembly to solve the problems existing in the prior art.
[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: A noise reduction sheet for subway wheels, characterized in that the noise reduction sheet comprises a sector alloy plate and an auxiliary alloy plate. The sector alloy plate is provided with bolt holes for connecting with the subway wheel and first riveting holes for connecting with the sector alloy plate or the auxiliary alloy plate. The auxiliary alloy plate is sector-shaped and has the same central angle as the sector alloy plate. The auxiliary alloy plate is provided with second riveting holes, and the auxiliary alloy plate is fastened on the side of the sector alloy plate close to the subway wheel.
[0007] Further, the first riveting holes on the sector alloy plate are located at the short arc end, and the auxiliary alloy plate is preferably installed at the short arc end of the sector alloy plate.
[0008] Further, 2 to 4 bolt holes are evenly distributed along the long arc end of the sector alloy plate.
[0009] Further, preferably 2 sector alloy plates are used and riveted to each other.
[0010] Further, preferably three auxiliary alloy plates are used and are jointly riveted on the same side of the sector alloy plate.
[0011] Further, both the sector alloy plate and the auxiliary alloy plate are made of vibration-damping alloy materials.
[0012] Based on the above technical problems, the present utility model also provides another technical solution: a noise reduction installation assembly for subway wheels, including bolts and several groups of the noise reduction sheets, and several groups of noise reduction sheets are evenly distributed on the surface of the subway wheels to jointly form a noise reduction installation assembly.
[0013] Compared with the prior art, the beneficial effects achieved by the present utility model are as follows:
[0014] 1. The noise reduction sheet of the present utility model has a simple structure, is convenient to process and install;
[0015] 2. The sector alloy plate and the auxiliary alloy plate of the noise reduction sheet of the present utility model can be freely combined, and the flexibility is higher during use;
[0016] 3. The noise reduction sheet of the present utility model is light in weight;
[0017] 4. The noise reduction effect of the noise reduction sheet of the present utility model reaches more than 10 decibels, and the noise reduction effect is good. Description of the Drawings
[0018] The drawings are used to provide a further understanding of the present utility model, and constitute a part of the specification. Together with the embodiments of the present utility model, they are used to explain the present utility model and do not constitute a limitation to the present utility model. In the drawings:
[0019] Figure 1 is a schematic structural diagram of the noise reduction sheet in Embodiment 1;
[0020] Figure 2 is a schematic structural diagram of the noise reduction sheet in Embodiment 1 installed on the subway wheel;
[0021] Figure 3 is a schematic structural diagram of Embodiment 1 for showing the bolt installation method.
[0022] In the figure, 1, noise reduction sheet; 11, sector alloy plate; 111, bolt hole; 112, first riveting hole; 12, auxiliary alloy plate; 121, second riveting hole; 2, subway wheel; 3, bolt; 4, noise reduction installation assembly. Detailed Embodiments
[0023] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0024] Embodiment 1
[0025] As Figure 1 shown, Embodiment 1 discloses a noise reduction sheet for subway wheels. The noise reduction sheet 1 includes a sector alloy plate 11 and an auxiliary alloy plate 12. The sector alloy plate 11 is provided with bolt holes 111 for connecting to the subway wheel 2 and first riveting holes 112 for connecting to the sector alloy plate 11 or the auxiliary alloy plate 12. The auxiliary alloy plate 12 is sector-shaped and has the same central angle as the sector alloy plate 11. The auxiliary alloy plate 12 is provided with second riveting holes 121, and the auxiliary alloy plate 12 can be freely combined and fastened on the side of the sector alloy plate 11 close to the subway wheel 2.
[0026] It can be understood that based on actual applications, the sector alloy plate 11 includes a short arc end and a long arc end. The first riveting holes 112 are located at the short arc end, and the auxiliary alloy plate 12 is preferably installed at the short arc end of the sector alloy plate 11. After the noise reduction sheet 1 is installed on the subway wheel 2, the auxiliary alloy plate 12 is close to the center position of the subway wheel 2, which is beneficial to absorbing the vibration force from the area with more intermediate assemblies of the subway wheel 2. The bolt holes 111 on the sector alloy plate 11 are evenly distributed with 2 to 4 along the long arc end, so that the sector alloy plate 11 can be firmly installed on the subway wheel 2. Each group of sector alloy plates 11 is composed of 1 to 3 sector-shaped alloy plates, and they are riveted together with the auxiliary alloy plate 12 through rivets. The auxiliary alloy plate 12 can be selected to be 1 to 3 and riveted together on the same side of the sector alloy plate 11. Both the sector alloy plate 11 and the auxiliary alloy plate 12 are made of vibration-damping alloy materials.
[0027] Based on the above, as Figure 2 shown, a number of groups of noise reduction sheets 1 are evenly installed on the surface of the subway wheel 2. A number of groups of noise reduction sheets 1 together form a noise reduction installation assembly 4, which plays a noise reduction role for the subway wheel 2. During installation, as Figure 3 shown, according to the structure of the subway wheel 2, an M8×20 hexagon socket head cap screw 3 with a strength grade of 8.8 is selected to install the noise reduction sheet 1 to meet the strength requirements.
[0028] The operating principle of this embodiment is as follows: The vibration generated by the interaction on the surface of the subway wheel 2 is transmitted to the sector alloy plate 11 and the auxiliary alloy plate 12, and is absorbed by the sector alloy plate 11 and the auxiliary alloy plate 12. The reason is that, on the one hand, the shapes of the sector alloy plate 11 and the auxiliary alloy plate 12 fit the shape of the subway wheel 2, which is convenient for sensing all the vibration forces of the subway wheel 2. On the other hand, the interior of the sector alloy plate 11 and the auxiliary alloy plate 12 is composed of twins. When subjected to external vibration, the movement of the twins will be caused. The twins gradually undergo elastic deformation to generate new twins, and the external vibration is eliminated due to such movement of the twins, achieving the effect of vibration reduction and noise reduction.
[0029] Experimental Example 1 Drop Ball Impact Noise Test
[0030] According to the test standard of "GB / T6882-2016 Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Precision methods for anechoic and semi - anechoic rooms", 1 group of bare subway wheels and 3 groups of noise reduction sheets were selected for the drop ball impact noise test, and radial excitation and axial excitation were applied to them. The results are shown in the following table.
[0031] Table 1 Noise Reduction Sheet Test Table for Drop Ball Impact Noise Test
[0032]
[0033] From the test results, the noise reduction effects of the 3 schemes of the noise reduction sheets all reach more than 10 decibels. The noise reduction effect of Experimental Group 3 is 0.2 decibels higher than that of Experimental Group 2, but the weight increases by 0.3 kg, and the performance ratio is not as good as that of Experimental Group 2. Therefore, the noise reduction sheet scheme of Experimental Group 2 is the preferred scheme.
[0034] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above - mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non - restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to encompass all changes within the meaning and scope of the equivalent elements of the claims in the present utility model. Any reference signs in the claims should not be construed as limiting the claimed rights.
Claims
1. A noise reduction sheet for subway wheels, characterized in that The noise reduction piece (1) includes a sector alloy plate (11) and an auxiliary alloy plate (12). The sector alloy plate (11) is provided with bolt holes (111) for connecting with the subway wheel (2) and first riveting holes (112) for connecting with the sector alloy plate (11) or the auxiliary alloy plate (12). The auxiliary alloy plate (12) is sector-shaped and has the same central angle as the sector alloy plate (11). The auxiliary alloy plate (12) is provided with second riveting holes (121). The auxiliary alloy plate (12) is fastened to the side of the sector alloy plate (11) close to the subway wheel (2).
2. The noise reduction sheet for a subway wheel according to claim 1, wherein, The first riveting holes (112) on the sector alloy plate (11) are located at the short arc end, and the auxiliary alloy plate (12) is installed at the short arc end of the sector alloy plate (11).
3. The noise reduction sheet for a subway wheel according to claim 2, characterized in that, There are 2 to 4 bolt holes (111) evenly distributed along the long arc end of the sector alloy plate (11).
4. The noise reduction sheet for a subway wheel according to claim 3, characterized in that, Preferably, 2 sector alloy plates (11) are used and riveted to each other.
5. The noise reduction sheet for a subway wheel according to claim 4, wherein Preferably, 3 auxiliary alloy plates (12) are used and are jointly riveted to the same side of the sector alloy plate (11).
6. The noise reduction sheet for subway wheels according to claim 5, wherein Both the sector alloy plate (11) and the auxiliary alloy plate (12) are made of vibration damping alloy materials.
7. A wheel noise reduction mounting assembly, characterized in that, It includes bolts (3) and several groups of noise reduction pieces (1) according to any one of claims 1 to 6. The several groups of noise reduction pieces (1) are evenly distributed on the surface of the subway wheel (2) to jointly form a noise reduction installation assembly (4).