Low-noise transformer oil tank

A technology of transformer oil tank and low noise, which is applied in transformer/inductor cooling, transformer/inductor casing, etc., and can solve problems such as excessive noise in substations

Pending Publication Date: 2021-05-04
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Realize the low-noise operation of transformers, effectively solve the problem of excessive no...

Method used

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  • Low-noise transformer oil tank
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The mass block can be of any shape, and it is a cylindrical additional mass in this embodiment;

[0031] A low-noise transformer oil tank, comprising an oil tank inner wall (2), an oil tank outer wall (1), a support partition (4), a film material (6) and an additional mass (5).

[0032] Such as figure 1 and figure 2 As shown, the inner wall (2) of the oil tank is made of steel plate, the inner wall is directly in contact with the transformer insulating oil, and the inside of the inner wall needs to be painted according to a conventional transformer.

[0033] The outer wall (1) of the fuel tank is made of steel plate, and the outer side of the outer wall is in contact with the air. It needs to be painted externally according to a conventional transformer to prevent corrosion of the steel plate and the weld.

[0034] The support partition (4) is installed in the middle of the inner and outer walls of the fuel tank through the installation bolts and the installation bol...

Embodiment 2

[0052] The inner box wall of the oil-immersed transformer is a steel plate with a thickness of 12mm, the outer box wall is a steel plate with a thickness of 6mm, the middle part of a single-layer supporting partition is a steel plate with a thickness of 3mm, the edge height is 10mm, the size of the partition is 200mm×200mm, and the size of the film is 50mm×50mm. The two partitions are pressed and bonded to each other. Four films are arranged on a set of supporting partitions. The mass block is 500g. They are arranged in the plane area between the inner and outer tank walls. The distance between the inner and outer tank walls is 20mm, and they are also arranged on the outer wall of the fuel tank On the outer side of the two reinforcement beams, they are arranged up and down in the groove space between the two reinforcement beams, and are connected with the reinforcement beams by welding.

Embodiment 3

[0054] According to the noise spectrum characteristics of the oil-immersed transformer, the thin film material in the supporting partition is designed, such as Figure 4 As shown, the overall diameter is 20mm, the mass block diameter is 10mm, and the thicknesses are 0.5mm, 1mm, 2mm...10mm respectively. For the sound insulation under each parameter, see Figure 5 . For the relationship between additional quality and frequency bands that can reduce noise see Figure 6 . according to Figure 6 Curve data fitting yields the following empirical formula:

[0055]f=288×m -0.5 (2)

[0056] Where m is the mass of the mass block in g, and f is the noise frequency that can be suppressed by the material.

[0057] Figure 6 Among them, D is the diameter of the mass block, and T is the thickness of the mass block.

[0058] In the embodiment, the mass of the mass block is obtained according to the noise frequency to be isolated, and the sound insulation is obtained according to the ...

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Abstract

The invention provides a low-noise transformer oil tank. The oil tank comprises an oil tank inner wall, an oil tank outer wall and a noise reduction interlayer arranged between the oil tank inner wall and the oil tank outer wall, wherein the noise reduction interlayer comprises an interlayer structure used for transmitting noise vibration energy and mass blocks located on the two sides of the interlayer structure, and the mass block is used for converting and consuming noise energy so as to reduce noise pollution. The oil tank can reduce outward propagation of sound waves, reduces noise transmitted by the tank wall of the oil-immersed transformer, is low in cost, does not affect the overall appearance shape of the tank wall, and can be used for a long time without maintenance.

Description

technical field [0001] The invention relates to the field of environmental protection of power transmission and transformation equipment, in particular to a low-noise transformer oil tank. Background technique [0002] Large oil-immersed transformers are the main noise source of substations. In order to reduce the noise interference of substations to surrounding residents, it is necessary to reduce the noise of power equipment from the source. At present, noise reduction optimization is mainly carried out from two aspects: transformer production process and iron core material, but due to factors such as cost and material properties, the room for noise reduction is already very small. Therefore, the traditional transformer oil tank has poor noise reduction ability and serious noise pollution. Contents of the invention [0003] In order to solve the shortage of current oil-immersed transformer noise reduction measures, combined with the noise transmission path of oil-immers...

Claims

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Application Information

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IPC IPC(8): H01F27/02H01F27/14
CPCH01F27/02H01F27/14
Inventor 马裕超莫娟李想聂萌陈强徐金李毅刚樊宝珍沈鸿冰
Owner CHINA ELECTRIC POWER RES INST
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