Besides rubber shock absorbers, what other tools can reduce noise?

Rubber shock absorbers reduce noise. Noise enclosures are used to reduce noise from noise sources. It is inevitable that there will be noise when the machine starts now. Using shock absorbers to attenuate noise can play a certain role. The use of rubber shock absorber makes the factory shock absorption have a certain effect. What other tools are there to reduce noise? Transformer noise shield is an epoch-making patent product specially designed for power transformer noise, and it is a 100% solution for power transformer noise to spread in the air. At the same time, it is also a more cost-saving scheme. The transformer sound insulation cover adopts multi-layer restraint plate sound insulation technology, which greatly reduces the noise radiated by transformer noise through air; 1. Noise composition analysis of transformer: The electromagnetic noise of transformer belongs to mechanical noise, which is caused by the vibration caused by the periodic alternating force of alternating magnetic field on the core and coil. The vibration core (silicon steel sheet) coil radiates noise, and its main frequency depends on the AC frequency. However, due to the eddy current in the conductor and iron core of the electrified transformer, the radiated noise is far more complicated than the noise generated by single-frequency vibration. Second, the spread of noise: Generally speaking, the spread of noise can be divided into two categories: 1. It is the spread and diffusion of noise through the air, which is constantly attenuated and the energy density is continuously reduced. 2. Noise propagates through solid, beam, column and floor structure, and the energy density is also reduced, but the amplitude is not great. So the noise will spread further. In the affected room, because the noise is radiated from the floor, walls and other building structures, even if the doors and windows are closed, the indoor noise will not be reduced. Third, noise reduction methods are generally divided into active noise reduction and passive noise reduction. 1. Active noise reduction: It is not feasible for non-transformer manufacturers to reduce the inherent noise of transformers by changing the transformer structure. 2. Therefore, passive noise reduction is the only way to reduce transformer noise. Passive noise reduction is achieved by weakening and isolating the propagation path of noise. Therefore, according to the propagation path of noise, it can be divided into two parts: air sound insulation and solid sound insulation. From a practical point of view, the noise generated by fan heat dissipation can be reduced by sound insulation cover. In order to solve the problem of transformer noise spreading through the cooling hole, a muffler with transformer sound insulation cover is designed and studied, and it has been successfully engineered. Through experimental analysis, the theoretical numerical simulation calculation of muffler is basically consistent with the experimental results. On the premise of ensuring the ventilation and heat dissipation of the transformer, the muffler design has achieved the expected noise elimination effect, which has successfully developed the whole transformer sound insulation cover and effectively solved the problem of transformer disturbing people at low cost under the existing technical conditions. ?