US2098746A - Arrangement in condensers - Google Patents

Description

Nov. 9, 1937. a. HANSSON 2,098,746

ARRANGEMENT IN CONDENSERS Filed March 20, 1936 2 Sheets-Sheet 1 fi-g m 1 WQ 2% gig f/z yem or E/"Or flu/(s30 flzfol'n e Nov. 9, 1937. B, HANS ON 2,098,746

ARRANGEMENT IN CONDENSER'S Filfld larch 20, 1936 2 Sheets-Sheet 2 1 .//1 Yew for.

Patented Nov. 9, 1937 UNITED STATES 2,098,746 ARRANGEMENT m connnsssas Broi- Hanson. Stockholm, Sweden, assignmto Allminna Svenaka Eiektriska Aktiebolaget, Vasteras, Sweden, a Swedish corporation Application March 20, 1936, Serial No. 69,779 In Sweden September 2, 1935 Claims.

The present invention relates to condensers of the type consisting of metal foil electrodes wound spirally to a roll with an intermediary insulating layer. In such condensers the roll is as a rule inserted in a tank containing an insulating medium, generally oil, and the heat losses of the condenser are conducted to the surrounding atmosphere through the oil and the walls of the tank. The oil in the tank is often put under pressure, higher than that of the surrounding air, so that the insulating strength is increased considerably more than the heat dissipation quality of the oil. As the load capacity of the condenser depends to a high degree upon the heat dissipating quality, a very effective cooling is, therefore,

of paramount importance.

from the interior of the condenser is effected when one electrode of the condenser makes direct metallic contact with a wall in the tank enclosing the condenser. When the tank is filled with a medium under pressure the wall making contact with the foils must never yield under the pressure to which it is subjected as this would greatly lessen the cooling action. This refers especially to tanks with plane walls as most commonly used for condensers.

The present invention has for its object the provision of means whereby the cooling wall with the condenser foils pressed against it remains in its original plane condition in spite of the interior pressure acting upon it in the tank.

In the accompanying drawings which illustrate the invention, by way of example, in diflerent formsz- Fig. 1 is a cross-section of one form of the condenser;

Fig. 2 is a similar view 01' another form;

Fig. 3 is an enlarged view partly in section of a third form; and

Figs. 4 and 5 are sectional views taken at right angles to each other and showing still another form of the condenser made in accordance with this invention.

In the form shown at Fig. l, the condenser rolls i are inserted into a cylindrical tank 3 with a circular, flexible bottom wall it and a circular cooling wall 2 against which the toils protruding at the ends of the condenser rolls l are pressed. The tank 3 is filled with oil under pressure and the flexible wall 3! is corrugated in order to better withstand the stresses due to the internal pressure. Another tank "having a flexible wall 32 similar to the former one II but enclosing no condenser elements is placed on the other side 01' the cooling wall 2. The two tanks communicate with each other, so that the pressure is the same on both sides of the wall 2.

The cooling wall 2 consists of two metal sheets 2|, 22 with spacing pieces conveniently consisting of warts or beads 23 stamped into the sheets and other impressions, if required, for stiflening the sheets. The warts of the two sheets. are turned against each other and welded or soldered or joined to each other by other means. A firm double wall is thus formed and inside of it a cooling fluid, such as water, may circulate.

The cooling wall 2 is placed horizontally with the condenser elements underneath the same so that the heat from the condenser elements is transmitted to the surrounding fluid and rising upwards with same may be collected at the cooling wall 2 and led away from the same by the cooling medium.

In Figure 2 one metal sheet 2| is plane and the other 22 is cupola shaped and cooling fluid is .circulated between them. The double wall formed by the sheets is stiffened by means of distance pieces 25, which also serve as cooling .two, with the plate walls 2 turned towards each other but separated by means of intermediary pieces ii and being bolted together by means of the flanges of the plate walls and flanges 12 on an outer tank 4, made in four sections. When assembled the condenser tanks 3 are suspended inside the tank 4 between the flanges l2. The inner tanks 3 and also the outer tank 4 are fllled with "a medium (liquid or gas) under pressure; and the adjacent tanks 3 which are bolted together communicate with each other for example by means of a hole in the plate walls 2. The pressure on both sides of the double wall 2 is thus the same and the wall remains in its original plane condition. The spacing pieces ll holding the plate walls 2 apart from each other are arranged in such a way that channels are formed between the walls and in these channels a cooling medium is circulating. The supply pipe of the circulating medium is shown at 9.

As one electrode is in direct metallic contact with the tank 3 and as this is connected to the tank d, the latter forms one pole of the condenser battery. The tank d should therefore be insulated from ground and the cooling medium vshould be led to the supply pipe 9 by means of an insulating tube. The other pole or terminal connection of the condenser is carried through the tanks by means of the bushings and ii.

Figs. 4: and 5 show an arrangement in which the cooling wall 2 is common to both of two tanks 3, enclosing the condenser elements i placed on each side of the wall which has the protrudwall, a second wall serving as a support for the cooling wall, and means for applying to the second wall fluid pressure equal to the pressure of the saidmedium in the tank to maintain the said cooling wall in plane form.

2. In a condenser of the character described, a tank, a medium under pressure in the tank, a

' cooling wall subjected to the pressure of said medium, condenser elements enclosed in the tank and having their rolls pressed against the said wall, a second wall serving to support the said cooling wall, depressions formed in said walls and secured to each er, and means for applying fluid pressure to the second wall to support both walls.

3. In a condenser or the character described, a tank, a medium under pressure in the tank, a cooling wall subjected to the pressure'of said medium, condenser elements enclosed in the tank and having their foils pressed against the said wall, a second wall adjacent to the cooling wall, cooling and supporting flanges between said walls, and means for applying fluid pressure to the second wall to supportthe cooling wall in plane form.

4. In a condenser of the character described, a tank, a medium under pressure in the tank, a cooling wall subjected to the pressure of said medium, condenser elements enclosed in the tank and having their foils pressed against the said wall, means for applying fluid pressure-tosaid wall to maintain same in plane form, and at least one elastic wall for maintaining fluid pressure upon the wall.

5. In a condenser of the character describeda tank, a medium under pressure. in the tank, a cooling wall subjected to the pressure of said medium, condenser elements enclosed in the tank and having their foils pressed against the said wall, means for maintaining said wall in plane form against the pressure of said medium, means for supplying cooling medium to said wall, and

means for electrically insulating the same fromsaid wall.

BROR BSON.

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