Arrangement for reducing radiation of noise from liquid-cooled transformers or chokes
An arrangement for reducing the radiation of noise from liquid-cooled transformers or chokes includes a tank having stiffeners arranged outside on the side walls of the tank, where a region situated between each stiffener is covered by a sandwich panel that is fastened to each stiffener, where each sandwich panel has a metallic wall that hermetically closes off a cavity that is filled with a composition composed of a polymer material and a filler material, where the composition has a specific weight of >2 grams per cubic centimeter.
1. An arrangement for reducing the sound emission from liquid-cooled transformers or chokes, the arrangement comprising:
a tank having externally arranged stiffeners on side walls of the tank, each region of the side walls lying between the externally arranged stiffeners being covered by a corresponding sandwich panel attached to the externally arranged stiffeners;
wherein each sandwich panel includes a metallic casing that encircles a cavity to hermetically seal the cavity;
wherein the cavity is filled with a composition of a polymer material and a filler; and
wherein said composition of the polymer material and the filler has a specific weight of >2 grams per cubic centimeter.
2. The arrangement as claimed in claim 1 , wherein the polymer material is an epoxy resin.
3. The arrangement as claimed in claim 1 , wherein the filler is a metallic material.
4. The arrangement as claimed in claim 2 , wherein the filler is a metallic material.
5. The arrangement as claimed in claim 1 , wherein the filler is silica sand.
6. The arrangement as claimed in claim 2 , wherein the filler is silica sand.
7. The arrangement as claimed in claim 3 , wherein each sandwich panel is formed as a cuboid.
8. The arrangement as claimed in claim 5 , wherein each sandwich panel is formed as a cuboid.
9. The arrangement as claimed in claim 7 , wherein each sandwich panel is arranged externally between adjacent stiffeners, and wherein a connection between the metallic casing of a sandwich panel and a stiffener comprises a welded joint.
10. The arrangement as claimed in claim 9 , wherein each metallic casing of a sandwich panel that faces the side wall of the tank is arranged adjacent to a region with an interposition of an elastic element.
11. The arrangement as claimed in claim 7 , wherein each sandwich panel is attached via a detachable connection on an end face of a stiffener, said end face facing away from the side wall of the tank, with an interposition of an elastic element.
12. The arrangement as claimed in claim 3 , wherein the metallic filler is formed by steel abrasive.
13. The arrangement as claimed in claim 10 , wherein the elastic element is formed by a strip made of an elastomer.
14. The arrangement as claimed in claim 11 , wherein the elastic element is formed by a strip made of an elastomer.