Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/08—Cooling; Ventilating
  • H01F27/10—Liquid cooling
  • H01F27/12—Oil cooling
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/08—Cooling; Ventilating
  • H01F27/10—Liquid cooling
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/02—Casings
  • H01F27/025—Constructional details relating to cooling
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
  • H01F27/00—Details of transformers or inductances, in general
  • H01F27/33—Arrangements for noise damping

Definitions

• the present invention relates to a boiler for a liquid-cooled transformer or choke, as used in power supply networks.
• Coolant e.g. Oil, filled cauldron are included.
• Boiler wall to an unwanted sound radiation.
• passive measures have long been known.
• Injection holes are injected into individual cells.
• Each cell is bounded by two metallic stiffeners and each connected via an elastic sealing strip outer plate.
• the disadvantage here is that the metallic
• Stiffeners and plates increase the external dimensions, whereby the transport of a power transformer, which often leads through tunnels, is difficult.
• the sound absorbing device of a variety of
• Polyurethane foam is sprayed or mounted in the form of plates.
• the polyurethane foam are to
• sandwich plate systems are known with which the rigidity and strength of a metallic structure can be increased by an uncured between two metal layers
• Plastic material is sprayed, which is suitable after curing, shear forces between the metal layers transferred to.
• Such a structural laminate also as
• Sandwich Plate System is described, for example, in WO 2003/101728, WO 01/32414, WO 99/058 333.
• SPS Sandwich Plate System
• a steel-plastic-steel sandwich construction known per se is used for the production of a double-walled boiler.
• the double wall boiler constructed in this way comprises: a) an outer boiler shell with a bottom part; b) one from the outer shell of the boiler at a distance
• Adhesion to the inner surfaces is designed so that d) that shear forces are transmitted between the inner and outer boiler shell, and
• the arranged between the two boiler walls plastic is dimensioned in its properties so that on the one hand the line of structure-borne noise is inhibited from the interior of the boiler in the outer space.
• connection between plastic and metallic shell wall is designed so that shear forces can be transmitted between the inner and outer shell wall.
• the sandwich construction also assumes a supporting function. The consequence of this is that stiffeners are made smaller and take up less space. Despite the sound insulation, there is no increase in the external dimensions. Since the otherwise usually required inner stiffeners can be made smaller, also increases the usable light
• Boiler width For internals is therefore more space to
• a suitable plastic in a liquid (not yet cured) state by injection openings, which are provided on the inner and / or outer shell boiler sprayed. For the outlet of the air corresponding outlet openings are provided.
• the thus introduced between the walls of the double-walled boiler plastic acts in a cured state in an analogous manner as a box-carrier or an I-beam. It adheres so strongly to the inner surfaces of the walls that
• the inner shell of the shell has a thickness which is smaller than the thickness of the outer shell of the shell.
• the body sound conduction can be very well inhibited if the distance between the inner surfaces of the inner and outer shell of the boiler is in a range of about 5 mm to 50 mm. Particularly preferred is in a
• Power transformer or power choke a thickness of the plastic or polymer material of about 30 mm.
• the waste heat generated during operation is largely dissipated to the outside space by the insulating liquid (e.g., transformer insulating liquid), the insulating property of the resin between turns of the boiler is
• thermoly conductive additives or similar acting filler are mixed. This may also be advantageous if embedded in the plastic between a layer Cooling line is housed, which is integrated into the cooling system of the transformer or the throttle.
• the boiler is characterized in that the inner shell of the boiler in
• the metal plates are welded by welding to strips or other spacers, which in turn are welded to the inner surface of the outer shell of the boiler.
• This embodiment is particularly preferred in the manufacture of power transformers.
• the inner boiler is made in one piece and is introduced as a kind of insert in the pot-shaped outer boiler.
• FIG. 1 shows a boiler according to an embodiment of the
• FIG. 1 shows the inner boiler shell of Figure 1, in one
• Figure 3 is a representation of the detail "X" of Figure 1;
• Figure 4 shows a section through the horizontal circumferential
• Figure 5 shows a detail of the boiler end wall, shown in a vertical section, seen from the outside;
• Figure 6 shows a detail of the boiler end wall, shown in a vertical section, seen from the inside; 7 shows a detail of the boiler wall in the region of a
• Insulating fluid connection shown in a vertical section
• Figure 9 shows a detail of the double-wall boiler
• FIG. 1 shows a boiler 1 whose jacket is in the manner of a
• Double wall boiler is constructed.
• the two double walls 2, 5 are formed by an outer shell shell 2 and an inner shell shell 5, which are arranged at a distance 4 from each other. Between these two jackets 2, 5 is a circumferential gap 6, which is filled according to the invention with a plastic or polymer material 7.
• the outer shell shell 2 continues downwards tapering to a bottom part 3.
• the bottom part 3 rests on elastic supports 19 on a foundation.
• On the lid 8 are the
• the stiffeners 16 run around the top and bottom of the boiler shell.
• the interior 9 of the boiler 1 is filled with an insulating liquid (transformer oil) 24.
• the insulating liquid 24 surrounds an arranged in the interior 9 active part 10. This active part consists in a
• the active part 10 is not shown in detail in the drawing of Figure 1 for the sake of clarity.
• the magnetic core When operating a transformer or a throttle, the magnetic core is known to be excited by magnetostriction to vibrate. These vibrations propagate on the insulating liquid 24. Also the head of the
• FIG. 1 shows the inner boiler shell 5 in one
• the inner jacket 5 is formed in each case by opposing longitudinal and end sides. Each of these sides is made of individual metal plates 18
• Front side is an entry hatch 26 to see in a assembled state of the boiler with a hatch cover 20 is closed ( Figure 5).
• the delimitation of the interspace of FIG. 6 between the inner and outer boiler shells 2, 5 takes place by means of a terminating strip 20.
• FIG. 3 shows the detail "X" of FIG. 1 in one
• the outer vessel wall 2 has a shell thickness 12 which is greater than that
• the adhesion of the plastic 7 to the inner surfaces 13 and 14 and its physical property is dimensioned so that a shear force between the two walls 5 and 2 can be transmitted.
• the metal-plastic composite contributes to mechanical stability and it is possible that the
• Reinforcement 16 which prevents implosion of the boiler when applying the vacuum, can be dimensioned smaller, and consequently takes up less space.
• FIG. 4 shows a section through the horizontally encircling stiffener 16.
• the metal plates 18 fastened to the strips 17 by means of a welded joint 25 are visible.
• the strips 17, in turn, are welded to the outer shell 2 as already mentioned.
• the stiffener 16 is in turn stiffened with ribs 28.
• Figure 5 shows a vertical section through a
• Stiffening rib 16 and with a view of the metal plate 18 a arranged in the interior 9 stiffening ribs 28.
• the double-wall structure sits on the end wall to the
• FIG. 7 shows a detail through the boiler wall in the region of a pipe feed-through 21, which is provided for the discharge of the insulating liquid.
• the intermediate space formed by the double-wall structure 2.5 is again closed by a closing strip 20.
• Figure 8 shows a section of the boiler wall in the region of the connection of the cooling system.
• the connecting pipe 22 serves for connection to a heat exchanger, not shown. For marginal completion of the gap takes over here not a conclusion bar, but the connection pipe 22 itself.
• Figure 9 shows an enlarged view of a
• a cooling line 30 provides that of the
• Insulating fluid eg., Transformer oil
• the cooling line 30 abuts against the inner wall 13 of the inner boiler shell 5 and is secured by means not shown clips.
• the reference numeral 29 is exemplified one of a plurality of injection port or air outlet openings 29 in the inner vessel 5, which are closed again after the introduction of the plastic 7 (for example, welding).
• Manufacturing step attaching the strips 17 at the
• the metal plates 18 are successively placed on the strips 17 and also welded by means of a fillet weld. This creates an inner boiler shell 5 with congruent flat front and side surfaces.
• the plastic is then injected through injection openings 29, followed by curing and by adhesion a firm connection with the inner surfaces 13, 14. Finally, the injection openings and air outlet openings 29 are closed, for example
• Injection openings / outlet openings 29 is dependent on the size of the metal plates 18 and the distance 4.
• Boiler shell without bottom part.
• the inner jacket has a bottom part and also the intermediate space is filled with plastic.
• the two coats are similar to a pot and a matching planter.
• the plastic formed in the gap does not have to be made of a fabric but can of course be made out be composed of different plastic layers and plastic structural elements. It is also conceivable that the lid is designed as a double-wall structure.
• insulating liquid e.g., transformer oil

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Housings And Mounting Of Transformers (AREA)
• Insulating Of Coils (AREA)
• Transformer Cooling (AREA)
• Building Environments (AREA)
• Frying-Pans Or Fryers (AREA)

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

Family

ID=46208550

Family Applications (1)

Country Status (7)

Cited By (5)

Families Citing this family (5)

Citations (15)

Family Cites Families (4)

• 2012
  • 2012-06-05 MX MX2014014846A patent/MX336178B/es unknown
  • 2012-06-05 BR BR112014030107A patent/BR112014030107B8/pt active IP Right Grant
  • 2012-06-05 KR KR1020157000145A patent/KR101944967B1/ko not_active Expired - Fee Related
  • 2012-06-05 CN CN201280073751.5A patent/CN104335301B/zh active Active
  • 2012-06-05 WO PCT/EP2012/060603 patent/WO2013182227A1/de active Application Filing
  • 2012-06-05 EP EP12725774.9A patent/EP2856477B1/de active Active
• 2014
  • 2014-11-19 IN IN9796DEN2014 patent/IN2014DN09796A/en unknown

Patent Citations (15)

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