Low-noise transformer shell

Abstract

The invention provides a low-noise transformer shell which is applicable to power transformers composed of iron cores and coils. The low-noise transformer shell comprises an inner shell and an outer shell, a transformer stator composed of an iron core and a coil is arranged in the inner shell, a pore cluster is arranged at the center of each surface of the inner shell, and silencing cotton is arranged on the outer surface of the inner shell and on the inner surface of the outer shell. By the transformer shell, low-frequency noise can be converted into high-frequency noise to be efficiently absorbed by the silencing cotton on the outer surface of the inner shell and on the inner surface of the outer shell, transformer noise is greatly reduced, and ambient environments are improved.

Description

Technical field [0001] The present invention relates to the field of basic power facilities, in particular, a power transformer housing composed of silicon steel sheets and coils. [0002] Background technique [0002] In the field of civil power supply, high-voltage power is usually used for power transmission, which can reduce the loss of current on the transmission line. Near the user end, it is usually necessary to set up a substation to step down the high-voltage power to meet normal power consumption. The mains voltage is 220V. In this kind of high-voltage substation, the used transformer is usually an iron core transformer composed of silicon steel sheets and coils, and is usually a three-phase autotransformer. In this kind of iron core transformer, in order to reduce the eddy current generated by the alternating magnetic field in the iron core, the structure of the iron core is generally made of stacked silicon steel sheets, so that the eddy current can be limited to ea...

AI Technical Summary

Problems solved by technology

However, the defect of using this kind of iron core made of stacked silicon steel sheets is that in the process of electromagnetic alternating, the silicon steel sheets continuously generate magnetic force effects according to the frequency of alternating current, so that the continuous vibration and collision between each silicon steel sheet causes a huge noise

In this regard, measures such as improving the coating of silicon steel sheets and adding sound-absorbing cotton to the transformer casing are currently used to reduce noise. However, this kind of noise can be clearly heard near the transformer, seriously disturbing the lives of nearby residents.

Among them, because the silicon steel sheet coating is limited by the material, the shock absorption effect is limited; for the sound-absorbing cotton, it has a better effect on high-frequency noise, but for low-frequency vibrations whose main frequency is the same as the AC frequency (50 Hz), the effect is good. Therefore, the current transformer noise problem has not been effectively solved

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