US1631711A - Radiator tank - Google Patents

Description

June 7, 1927. 1,631,711

E. D. TREANOR I RADIATOR TANK Filed Sept. 8. 1921 Inventor Edward D.T'r-ean on H is Attor-n ey.

Patented June 7, 1927.

UNITED STATES PATENT OFFICE.

, EDWARD D. TREANOR, OF PITTSFIELD, MASSACH USETTS, ASSIGNOR T GENERAL ELEC- TRIC COMPANY, A CORPORATION OF NEW YORK.

RADIATOR TANK.

Application filed September 8, 1921. Serial No. 499,358.

My invention relates to heat radiating tanks or containers adapted to contain a quantity of oil in which certain types of electrical apparatus are submerged for cooling purposes, the tank being constructed and arranged so as to permit the oil to circulate in such manner as to ensure that the rise of temperature of the apparatus during operating periods will not exceed a safe limit.

More particularly ,this invention has to do with the provision of a tank or container with a large radiating surface exposed to the surrounding atmosphere so that the heat generated by the electrical apparatus during its operation may be absorbed by the oil and dissipated efficiently, the construction of the tank being such that the oil may circulate freely to transfer the heat from the appararatus to the heat radiating portions of the tank.

My invention is particularly applicable to transformer tanks as illustrated in the accompanying drawing, one of the heat radiating elements being shown with a small portion broken away to show an oil opening between the space within this radiating element and the interior of the tank.

In the embodiment of the invention shown in the drawing, the transformer tank in cludes a body 1 wlth a simple cylindrical shaped wall and a plurality of radiating elements 2 welded to the outer face of this wall. These radiating elements 2 have the form of channels approximately V-shaped in cross section and closed at their upper and'lower ends. These radiating channels 2 are placed in vertical positions with their open faces against the outer surface of the body 1 of the tank and the channels and body of the tank are then welded firmly together at the welded joints 3.

Openings or perforations are formed by punching, drilling, or otherwise perforating the wall of the tank body to provide oil passages between the interior of the tank and the spaces within the channels. These openings may be of any desired size or contour. except as limited by the size and shape of the faces of the channels surrounding these openings. One of the channels 2 is shown in thedrawing brokenaway to reveal an oil passage or opening 4'. which is substan- .tially circular in shape and located to permit passage of oil between the upper portion of the interior of the tank and the upper end of the space within the channel. Another opening 5 near the bottompf the channel permits the oil to pass back again into the interior of thetank near the bottom thereof.

As is well known to those familiar with the operation of electrical apparatus, a transformer generates more or less heat while in operation and this heat must be dissipated at a rate sufficiently great to prevent overheating and consequent injury in the transformer. In a tank constructed in accordance with the present invention, the oil surrounding the submerged transformer absorbs the heat generated bythe transformer and by expansion is caused to rise toward the top of the tank, being replaced by cool oil entering the body of the tank from the channels 2 through the passages 5 near the lower ends of the channels. The heated oil above the transformer leaves the upper portion of the body of the tank through the passages 4i into the upper portions of the spaces within the channels 2, the path of the oil oeing thus completed. The heated oil now in the channels is cooled by radiation from the outer faces of the channels which are exposed to the surrounding atmosphere. It is obvious that the rate at which heat is radiated from the channels may be increased or diminished as desired by increasing or diminishing the dimensions of the channels so as to expose the proper amount of radiating surfaceto the surrounding atmosphere.

The invention is, of particular advantage in connection with oil immersed transformers such as pole type or subway distribution transformers which are operated with only periodical inspection. In such cases, there may be a considerable drop in the level of the oil due to evaporation before the loss of oil is discovered and the evaporated oil replaced. It is often desirable to anticipate a possible loss of oil in this way' as great as fifteen per cent of its total original volume. A considerable advantageof the invention is that the effectiveness of the increased heat radiating surface provided by the heat radiating channels 2 is reduced only very slightly even should the oil level drop below the upper communicating passages 4. In this event, the circulation of oil through the channels 2 is of course stopped, but there is still an efficient heat conducting path from the oil within the casing 1 cure by Letters Patent of the United States 1. A container for oil immersed electrical apparatus, said container including a metal body portion ith a plurality of openings in its" Wall,- and a hollow; channel-shaped member with its edge portion Welded to" the outer surface of said Wall around said open ings;

2. A- container for oil immersed electrical apparatus, said container including-a metal body portion with a plurality of openings in itswaill, and a hollow radiatingmeniber open at onesi'de to forin an eagmhe edge portion of the radiatingineinber' being Welded to the outer surface of said Wall around said openings in the Wall.

3. A container for oil'immersedel'ectrical apparatus, said container including a metal body portion, and a hollow radiating member With an opening at one side to form an 'eidge theedge portion of the radiating member being Welded to the outer surface of the body portion of thecontainer, and the contain'en Wallbeing perforated to permit a liquid to pass between the interior of the container and the interior of the radiating mei'nbe'r through V the opening in its side 111* witness whereof, I have hereunto set my hand this: 6th day of Sept. 1921'.

EDWARD D; TREANOR;

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