Mixed sound absorbing-insulation device for transformer multi-band noise reduction

A sound-absorbing, sound-insulating, hybrid technology, applied in instruments, sound-producing instruments, etc., can solve the problems of only isolation effect, cumbersome and other problems, and achieve the effect of simple structure, pollution reduction, and free combination.

Active Publication Date: 2019-04-09
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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  • Claims
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Problems solved by technology

This method involves multi-physics field coupling calculation and sound source inversion calculation. Once the sound source and target noise reduction area change, the calculation needs to be recalculated, and the parameters of the metamaterial must also be changed, which is cumbersome and has only an isolation effect on noise.

Method used

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  • Mixed sound absorbing-insulation device for transformer multi-band noise reduction
  • Mixed sound absorbing-insulation device for transformer multi-band noise reduction
  • Mixed sound absorbing-insulation device for transformer multi-band noise reduction

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 2 As shown, the hybrid sound-absorbing and insulating device for transformer multi-band noise reduction of the present invention includes 16 hybrid sound-absorbing and insulating material units 1 , a fixed frame 2 and a supporting bracket 3 for the sound-absorbing and insulating device. The 16 hybrid sound-absorbing and insulating material units 1 are fixed by the fixed frame 2 and embedded in the supporting bracket 3 of the sound-absorbing and insulating device.

[0028] Such as image 3 As shown, the support bracket 3 of the sound-absorbing and insulating device of the embodiment of the present invention is composed of a cylindrical stainless steel fixing sleeve 4, a "eight"-shaped bracket 5, a cuboid base 6 and 4 pulleys 7, of which 4 The pulleys are respectively located at the four corners of the bottom surface of t...

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Abstract

The invention discloses a mixed sound absorbing-insulation device for transformer multi-band noise reduction. A mixed sound absorbing-insulation material unit (1) is fixed by a fixed frame (2) and embedded into a sound absorbing-insulation device support bracket (3); the mixed sound absorbing-insulation material unit (1) is composed of micropunch boards (15-18), a space coiled acoustic metamaterial unit (9) and a connecting box (10); the space coiled acoustic metamaterial unit (9) is a cuboid with a square side, constant-width acoustic waveguides (14) in zigzag are arranged in the cuboid; theshapes of the acoustic waveguides (14) on various horizontal sections are same. The air can be propagated along the acoustic waveguides (14) in the space coiled acoustic metamaterial unit (9); the micropunch board (8) and the space coiled acoustic metamaterial unit (9) are wrapped in the connecting box (10), and the micropunch board (8) is parallel to an entrance surface of the space coiled acoustic metamaterial unit (9) and is distanced from the same with a certain horizontal distance.

Description

Technical field: [0001] The invention relates to a hybrid sound absorbing and insulating device for a transformer. Background technique: [0002] With the rapid development of my country's economy, the demand for electricity in cities has increased year by year, and more and more substations have been built. Especially with the acceleration of urbanization, substations have gradually appeared in residential areas, and the noise generated by transformer operation has seriously affected the daily life of surrounding residents. It is urgent to control the noise of transformers in work and life. [0003] Transformer noise is mainly composed of two parts: one is the vibration caused by the magnetostrictive effect of the silicon steel sheet of the transformer core, which is transmitted to the box through the transformer oil to cause the surrounding air to vibrate and then generate noise, that is, the noise of the transformer body, and the frequency of the body noise is mainly Dist...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10K11/162G10K11/172
CPCG10K11/162G10K11/172
Inventor 赵欣哲李彩莲刘国强
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
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