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US1526771A - Casing for transformers - Google Patents

Casing for transformers Download PDF

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Publication number
US1526771A
US1526771A US691793A US69179324A US1526771A US 1526771 A US1526771 A US 1526771A US 691793 A US691793 A US 691793A US 69179324 A US69179324 A US 69179324A US 1526771 A US1526771 A US 1526771A
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US
United States
Prior art keywords
casing
transformers
transformer
heat
tubes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US691793A
Inventor
Locke H Burnham
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by General Electric Co filed Critical General Electric Co
Priority to US691793A priority Critical patent/US1526771A/en
Application granted granted Critical
Publication of US1526771A publication Critical patent/US1526771A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00Details of transformers or inductances, in general
    • H01F27/02Casings
    • H01F27/025Constructional details relating to cooling

Definitions

  • My invention relates to casings for transformers and more particularly to casings adapted to contain an insulating and cooling liquid in which the transformers are immersed.
  • transformers results in the generation of heat in the windings and magnetic core, and this heat mustbe properly dissipated to prevent the occurrence of excessive temperatures.
  • the dissipation of heat is commonly provided for by immersing a transformer in a suitable cooling liquid within a casing or container provided with external heat radiators.
  • the heat generated in the transformer is absorbed by the surrounding liquid which rises by convection within the casing and thence descends through the external radiators where it is cooled to return into the casing ready to absorb more heat.
  • the object of the invention is to provide an improved form of tubular heat radiating element connected to a transformer casing for dissipating heat generated by a transformer immersed in a cooling liquid within the casing.
  • a transformer l is immersed in a cooling liquid 2 within a casing 3.
  • the casing is provided with external heat radiating units formed in acoordance with the invention and communicating at their upper and lower ends with the upper and lower parts of the casing respectively.
  • Heat generated in the transformer during its operation is given up to the surrounding liquid which rises by convection to the upper part of the casing, the heated liquid then descending through the heat radiating elements where it is cooled and finally returning into the lower part of the casing ready to absorb more heat from the transformer.
  • Each heat radiating element comprises two tubes 4 and 5, the tube 4 being nearest the casing 3 and having its ends bent or turned inwardly to register with openings in the casing wall.
  • the outer tube 5 is preferably somewhat shorter than the tube 4, and has its ends bent or turned inwardly to register with openings in the side of the inner tube 4.
  • the joints between the tubes 4 and 5 and between the inner tubes 4t and the casing 3 are preferably welded to prevent leakage and to provide sufficient strength for the support of both tubes.
  • the ends of the outer tube 5 communicate with the tube 4 at points which are preferably close to but between the inwardly bent ends of the inner tube at so that the outer tube 5 may be as long and present as much heat dissipating surface to the surrounding air as practicable.
  • the heated liquid in each radiating element will separate and descend in both tubes where it is efficiently cooled by dissipation of heat from their outer surfaces.
  • the outer tubes 5 do not interfere with or obstruct the free upward flow of cooling air between the inner tubes 4: and the casing wall and the effectiveness of the outer tubes 5 is obtained without the necessity of forming additional openings for them in the casing wall.
  • each of said elements comprising an inner tube having itsends turned inwardly to said casing and communicating therewith, and an outer tube having its ends turned inwardly to 10 said inner tube and communicating therewith at points between the inward- "iy turned ends of said inner tube.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)

Description

Filed Feb. 9, 1924 L H BURNHAM CA5 ING FOR TRANSFORMERS feb. 17, 1925.
Inventor Locke Hfiur'rfiham,
by H i s Att orney.
Patented Feb. 17, 1925.
UNITED STATES PATENT OFFICE.
LOCKE H. BURNHAM, OF PITTS-FIELD, MASSACHUSETTS, ASSIGNOR T'O GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.
CASING FOR TRANSFORMERS.
Application filed February 9, 1924. Serial No. 691,793.
To all whom it may concern:
Be it known that I, LOOKE H. BURNHAM, a citizen of the United States, residing at Pittsfield, in the county of Berkshire, State of Massachusetts, have invented certain new and useful Improvements in Casings for Transformers, of which the following is a specification.
My invention relates to casings for transformers and more particularly to casings adapted to contain an insulating and cooling liquid in which the transformers are immersed.
The operation of transformers results in the generation of heat in the windings and magnetic core, and this heat mustbe properly dissipated to prevent the occurrence of excessive temperatures. The dissipation of heat is commonly provided for by immersing a transformer in a suitable cooling liquid within a casing or container provided with external heat radiators. The heat generated in the transformer is absorbed by the surrounding liquid which rises by convection within the casing and thence descends through the external radiators where it is cooled to return into the casing ready to absorb more heat.
Many forms of external radiators have been used, one of the commonest forms being simple vertical tubes arranged in one or more rows around the transformer casing and communicating at their upper and lower ends with the upper and lower parts of the casing respectively. The object of the invention is to provide an improved form of tubular heat radiating element connected to a transformer casing for dissipating heat generated by a transformer immersed in a cooling liquid within the casing.
The invention will be described in connection with the accompanying drawing which shows a transformer casing equipped with heat radiating elements constructed in accordance with the invention, parts being broken away to reveal details.
As shown in the drawing, a transformer l is immersed in a cooling liquid 2 within a casing 3. The casing is provided with external heat radiating units formed in acoordance with the invention and communicating at their upper and lower ends with the upper and lower parts of the casing respectively. Heat generated in the transformer during its operation is given up to the surrounding liquid which rises by convection to the upper part of the casing, the heated liquid then descending through the heat radiating elements where it is cooled and finally returning into the lower part of the casing ready to absorb more heat from the transformer. Each heat radiating element comprises two tubes 4 and 5, the tube 4 being nearest the casing 3 and having its ends bent or turned inwardly to register with openings in the casing wall. The outer tube 5 is preferably somewhat shorter than the tube 4, and has its ends bent or turned inwardly to register with openings in the side of the inner tube 4. The joints between the tubes 4 and 5 and between the inner tubes 4t and the casing 3 are preferably welded to prevent leakage and to provide sufficient strength for the support of both tubes. The ends of the outer tube 5 communicate with the tube 4 at points which are preferably close to but between the inwardly bent ends of the inner tube at so that the outer tube 5 may be as long and present as much heat dissipating surface to the surrounding air as practicable.
After leaving the upper part of the casing 8, the heated liquid in each radiating element will separate and descend in both tubes where it is efficiently cooled by dissipation of heat from their outer surfaces. WVith the construction described, the outer tubes 5 do not interfere with or obstruct the free upward flow of cooling air between the inner tubes 4: and the casing wall and the effectiveness of the outer tubes 5 is obtained without the necessity of forming additional openings for them in the casing wall.
lVhat I claim as new and desire to secure by Letters Patent of the United States is 1. The combination with a casing for a transformer immersed in acooling liquid, of external heat radiating elements, each of said elements comprising an inner tube having its ends turned inwardly to said casing and communicating therewith, and an outer tube having its ends turned inwardly to said inner tube and communicatine therewith.
2. The combination with a casing for a transformer immersed in a cooling liquid, of external heat radiating elements, each of said elements comprising an inner tube having itsends turned inwardly to said casing and communicating therewith, and an outer tube having its ends turned inwardly to 10 said inner tube and communicating therewith at points between the inward- "iy turned ends of said inner tube.
In witness whereof, I have hereunto set my hand this 5th day of February 1924.
LOGKE H. BURNHAM.
US691793A 1924-02-09 1924-02-09 Casing for transformers Expired - Lifetime US1526771A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US691793A US1526771A (en) 1924-02-09 1924-02-09 Casing for transformers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US691793A US1526771A (en) 1924-02-09 1924-02-09 Casing for transformers

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US1526771A true US1526771A (en) 1925-02-17

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636752A (en) * 1947-11-24 1953-04-28 Allis Chalmers Mfg Co Conduit with branch applied against spot face of headers
US10130009B2 (en) * 2017-03-15 2018-11-13 American Superconductor Corporation Natural convection cooling for power electronics systems having discrete power dissipation components
US10629356B2 (en) * 2016-01-20 2020-04-21 Siemens Aktiengesellschaft Transformer with temperature-dependent cooling function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2636752A (en) * 1947-11-24 1953-04-28 Allis Chalmers Mfg Co Conduit with branch applied against spot face of headers
US10629356B2 (en) * 2016-01-20 2020-04-21 Siemens Aktiengesellschaft Transformer with temperature-dependent cooling function
US10130009B2 (en) * 2017-03-15 2018-11-13 American Superconductor Corporation Natural convection cooling for power electronics systems having discrete power dissipation components

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