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Noise reduction plate structure and transformer box body structure

A technology of noise reduction board and transformer, which is applied in the direction of transformer/inductor casing, transformer/inductor noise damping, etc., which can solve the problems of high development cost, poor pressure resistance performance, and poor noise reduction effect

Pending Publication Date: 2021-07-06
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the noise reduction design of the transformer box structure has high development costs, poor noise reduction effect, poor compressive performance, and high density.

Method used

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  • Noise reduction plate structure and transformer box body structure
  • Noise reduction plate structure and transformer box body structure
  • Noise reduction plate structure and transformer box body structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention provides a transformer box structure, such as figure 1 As shown, the upper panel 1 and the lower panel 2 of the wall panel sandwich noise reduction structure are made of steel plates, and the honeycomb core layer 3 is made of carbon fiber reinforced material (CFRP), such as figure 2 As shown, the shape of the honeycomb adopts an equilateral triangle honeycomb 4, the direction of the honeycomb is selected as the honeycomb is perpendicular to the panel, the quality of the panel and the honeycomb core layer is distributed according to the upper panel 1: the honeycomb core layer 3: the lower panel 2 is 1:1:1, and the height of the honeycomb is selected 30mm, the panel and the honeycomb core layer 3 are connected by glue. These designs can not only ensure that the overall structure of the panel sandwich has sufficient mechanical strength, stability, and safety, but also greatly improve its sound insulation performance, can significantly reduce transformer nois...

Embodiment 2

[0045] The noise-reducing structure of honeycomb wall panels for transformers adopts a three-layer structure. Both the upper panel 1 and the lower panel 2 are made of steel plates, and the middle honeycomb core layer 3 is made of carbon fiber reinforced material (CFRP). This structure has good sound insulation performance. And as a low-noise transformer box material, it has sufficient mechanical strength, stability and safety. The upper panel 1 and the lower panel 2 are connected with the honeycomb core layer 3 by glue, so that the manufacturing process is simple, safe, reliable, low in cost, and has significant direct and indirect benefits.

[0046] The honeycomb shape that the invention relates to adopts equilateral triangle honeycomb 4.

[0047] The direction of the cells of the honeycomb core layer 3 involved in the invention is selected so that the cells are perpendicular to the panel.

[0048] The quality of the upper panel 1 and lower panel 2 and the honeycomb core lay...

Embodiment 3

[0052] For a single-layer homogeneous plate, if it is assumed that: the sound wave is incident perpendicular to the plate; the plate is infinite and both sides of the plate are air; the influence of the plate boundary is not considered; the rigidity and damping of the plate are not considered; each particle on the plate is the same Velocity vibration, then, the sound insulation of the board TL 0 Approximate:

[0053] TL 0 =20lgm+20lgf-43dB

[0054] Among them, m is the mass per unit area of ​​the plate, and f is the frequency of the incident sound wave.

[0055] In practice, single-layer homogeneous plates have a certain stiffness, and will undergo forced bending vibration after being excited by sound waves. When the forced bending wave propagation velocity of the plate is equal to its inherent free bending wave propagation velocity, the incident acoustic energy can be transmitted to the other side of the plate in large quantities. This effect is called the coincidence effe...

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Abstract

The invention provides a noise reduction plate structure and a transformer box body structure, the noise reduction plate structure comprises a wall plate interlayer formed by an upper panel (1), a lower panel (2) and a honeycomb core layer (3) arranged between the upper panel (1) and the lower panel (2), and compared with a single-layer structure, the transformer box body structure has a good noise elimination effect.

Description

technical field [0001] The invention relates to the technical field of power grid environmental protection, in particular to a noise reduction board structure and a transformer box structure. Background technique [0002] With the development of social economy and the continuous growth of electricity load, the construction of smart grid with UHV grid as the backbone grid is steadily advancing, and the production and operation scale of large oil-immersed transformers is rapidly expanding. These transformers are relatively close to the residential buildings of urban residents. The vibration and noise generated by the equipment during operation, especially at night or during the peak power consumption period in summer, have a particularly prominent impact on the surrounding residents and seriously affect the physical and mental health of residents. Therefore, developing an efficient and convenient noise reduction measure to reduce the noise radiation level of large oil-immersed...

Claims

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Application Information

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IPC IPC(8): H01F27/02H01F27/33
CPCH01F27/02H01F27/33
Inventor 李想莫娟马裕超徐珂李泽鹏徐金李毅刚沈鸿冰
Owner CHINA ELECTRIC POWER RES INST
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