Author: Claire Publish Time: 2024-03-14 Origin: www.train-wheels.com
Vehicle noise not only affects the comfort of the vehicle, but also relates to environmental protection, so it is crucial to effectively control and reduce vehicle noise. The noise of subway vehicles mainly refers to the vibration of the tain bogie transmitted to the vehicle body and the vibration generated by the impact and friction vibration of the wheels and rails. Therefore, reducing the noise between the wheel and rail has become a key issue in the design and selection of bogie wheels for subway vehicles.
Resilient wheels are installed between the wheel rim and spokes of visco-elastic rubber liner, so that the wheel in the space of three-dimensional direction of the elasticity of the wheel compared with the overall wheel, relatively soft, elastic wheels can reduce the weight of the bogie under the spring, reduce the force between the wheel and the rail, is generally applicable to axle weight of 10t or less of the light rail vehicles.
Compared with rigid wheels, the noise outside the vehicle is reduced by 3.5-4dB(A); the noise inside the vehicle is reduced by 3dB(A), and the noise when the wheel passes the curve is reduced by about 10-20dB(A). Resilient wheels in Europe, Japan and the United States and other countries have been more applications
Noise-reducing wheels, in which a visco-elastic material is laid on the wheel surface without changing the wheel structure, do not require mechanical fasteners and neither spatial nor mass constraints are broken. It is suitable not only for tread-brake wheels but also for disc-brake wheels.
In addition to resilient wheels and damping wheels, the use of rubber wheels can also significantly reduce noise. Rubber wheels are not only characterised by low noise, low vibration, high adhesion and easy maintenance, but also easy to control the speed of the moving vehicle. However, tyre inflation must be monitored in real time and the tyres must be changed at regular intervals
Due to the impact between the wheel and the rail or rim friction, will provoke wheel vibration and radiate a strong noise, in the wheel after the installation of noise damping device, wheel vibration will be transmitted to the noise damping device, caused by the resonance of the noise damping device, the damping device will absorb the vibration of the wheel energy, so as to achieve the purpose of reducing noise. The United States and Europe and other rail vehicles are usually installed on the wheel ring damper and adjustable sheet damper to form a vibration-damping wheel to improve its noise reduction performance.
