Combined type vibration isolating device used for transformer

Abstract

The invention relates to a combined type vibration isolating device used for a transformer. The combined type vibration isolating device comprises a spring vibration insulator and a rubber vibration insulator, wherein the spring vibration insulator is positioned on the upper layer of the rubber vibration insulator, and is connected with a machine base table rack of the transformer; the rubber vibration insulator is positioned on the ground; the spring vibration insulator comprises at least two spring vibration isolating elements; the rubber vibration insulator comprises at least two rubber vibration isolating elements; the number of the spring vibration isolating elements is the same as that of the rubber vibration isolating elements; and the vertical axes of the spring vibration isolating elements and the vertical axes of the rubber vibration isolating elements are on the same plumb line. Compared with the prior art, the combined type vibration isolating device has the advantages of being wide in range of isolated vibration frequency, good in vibration isolating effect, strong in system stability, free of coupling vibration in other directions and the like.

Description

technical field [0001] The invention relates to the field of transformer vibration isolation, in particular to a combined vibration isolation device for a transformer. Background technique [0002] The vibration frequency of the transformer is mainly 100Hz and its multiple frequency, which is a high-frequency vibration compared with the frequency of the traditional shock absorber. Dry-type transformers are generally placed in the basement, and the vibration generated has a certain impact on adjacent rooms and floors. Traditional noise reduction methods only reduce transformer noise from the aspects of sound insulation and sound insulation. This approach can only reduce transformer noise transmitted through the air, and there is no way to reduce noise transmitted by structures. In fact, the structural micro-vibration generated by indoor transformers has little effect on the structure itself, while the noise induced by structural vibration has a greater impact on the normal l...

AI Technical Summary

Problems solved by technology

[0003] The existing single-layer vibration isolation device is more effective in low-frequency vibration isolation. In order to improve the vibration isolation efficiency of the vibration isolator, foreign countries have started to use double-layer vibration isolation since the 1970s. Theoretically, the double-layer vibration isolation system can reduce the transmission rate. To -24dB / oct, twice the efficiency of single-layer vibration isolation, reducing the vibration transmission from the transformer to the foundation as a whole

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