US3837763A - Liquid metal conduction pump - Google Patents

Liquid metal conduction pump Download PDF

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Publication number
US3837763A
US3837763A US00317842A US31784272A US3837763A US 3837763 A US3837763 A US 3837763A US 00317842 A US00317842 A US 00317842A US 31784272 A US31784272 A US 31784272A US 3837763 A US3837763 A US 3837763A
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US
United States
Prior art keywords
liquid metal
casing
end piece
air gap
conduction pump
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
US00317842A
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English (en)
Inventor
A Ertaud
J Panossian
H Carbonnel
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.)
Groupement Atomique Alsacienne Atlantique SA
Alsacienne Atom
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Alsacienne Atom
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Publication date
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Publication of US3837763A publication Critical patent/US3837763A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K44/00—Machines in which the dynamo-electric interaction between a plasma or flow of conductive liquid or of fluid-borne conductive or magnetic particles and a coil system or magnetic field converts energy of mass flow into electrical energy or vice versa
    • H02K44/02—Electrodynamic pumps
    • H02K44/04—Conduction pumps

Definitions

  • ABSTRACT A conduction pump having a simple structure for liquid metal, comprising a coil constituted by a refractory casing containing liquid metal and a metal flow duct connnected to the casing by two end pieces each comprising at least one opening.
  • the present invention concerns a conduction pump having a simple structure for liquid metal, which may be immersed in the said metal.
  • conduction pump designates a pump in which the liquid metal is set in motion by the electromagnetic force produced by the combined action of a magnetic induction and an electric current flowing perpendicular to the magnetic field, across a section of liquid metal flux.
  • a pump of that type is the object of French Pat. No. 71,09,159 filed in the name of the Applicant on Mar. 16, 1971.
  • the pump comprises:
  • a first magnetic circuit provided at its upper part with a first feed winding, and at its lower part with an air gap in which a horizontal magnetic field is set up;
  • a coil whose middle plane is horizontal, constituted by a refractory casing containing liquid metal in electrical contact at the level of the said air gap with the liquid metal flowing in the said duct;
  • a second magnetic circuit provided, at its upper part, with a supply winding inducing an electric current in the coil, the direction of that current being horizontal and orthogonal to the magnetic field in the section of liquid metal situated in the said air gap.
  • the coil is arranged appreciably below the said first and second windings, this enabling the said windings to be above the liquid metal bath when the coil is immersed in that bath.
  • the refractory casing of the coil is connected to the duct by means of two rigid electrodes ensuring electrical continuity between the liquid metal contained in the refractory casing and the metal flux flowing in the duct.
  • the Applicant conceived the idea of replacing the rigid-electrodes, which were delicate and expensive to manufacture in the liquid coil pump in the aforementioned patent, by end pieces provided with at least one opening establishing a communication between the inside of the refractory casing of the coil and the inside of the duct.
  • the end pieces are provided with n openings extended by separations dividing the coil and end pieces into 11 parallel channels.
  • FIG. 1 is a general view of a pump according to the invention.
  • FIG. 2 shows diagrammatically a conductive coil provided with end pieces according to the invention.
  • FIG. 3 is a first variant of a coil provided with end pieces.
  • FIG. 4 is a second variant of a coil provided with end pieces.
  • FIG. 5 shows diagrammatically a particular end piece.
  • That frame is connected with a winding 4 situated at the upper part of the frame 3 and wound round one of the sides of that frame.
  • the winding 4 is fed with alternating current, so as to set up, in the section of liquid metal situated in the air gap 2, a horizontal magnetic field. That air gap is situated at the lower part of the frame 3.
  • the pump comprises, moreover, a second magnetic circuit in the shape of a frame 5, a feed winding 6 situated in the upper part of the frame 5 and wound round one of the sides of that frame, and a conductive coil 7 having a rectangular cross-section surrounding one of the vertical sides of the frame 5.
  • the winding 6 is fed with alternating current so as to induce an alternating current in the conductive coil 7.
  • That coil 7 whose middle plane is horizontal is constitued by a refractory casing 8 containing liquid metal.
  • That casing 8 is connected to the duct 1 by two end pieces 9, 9 each comprising an opening making the inside of the casing 8 communicate with the inside of the duct 1, so that metal may flow between the casing 8 and the duct 1.
  • the section of metal situated between the end pieces 9, 9' has the alternating current generated in the coil 7 passing through it.
  • the coil 7 is arranged so that the direct current flowing between the end pieces 9 and 9 be orthogonal to the magnetic field set up in the air gap 2 and to the axis of the duct 1.
  • the end pieces 9 and 9' are situated on either side of the part of the duct 1 arranged in the air gap 2, and the casing 8 comprises a plane part situated facing that part of the duct arranged in the air gap 2, also arranged in the air gap 2.
  • the spire 7 is arranged at an appreciably lower level than the windings 4 and 6, so that these windings 4 and 6 be situated appreciably above the liquid metal bath when the coil 7, as well as the part of the duct 1 situated below that coil are immersed in the metal bath. It is thus possible, to protect the said windings 4 and 6 against any accidental rise in temperature which would make good operation of the pump impossible.
  • FIG. 2 shows diagrammatically a conductive coil 17, constituted by a casing 18 containing liquid metal. That coil has a rectangular cross-section and is connected to the duct 1 by two end pieces 19 and 19' each provided with a rectangular opening and 10'.
  • FIG. 3 is a first variant of a coil 27 constituted by a casing 28 containing liquid metal and ended by two end pieces 29 and 29' connecting that coil 27 to the flow channel 1.
  • the end piece 29 comprises n openings of equal cross-section, arranged one below another, such as a, 20b Likewise, the end piece 29' comprises n openings having an equal surface, such as 20a, 20b
  • the openings 20a, 20b 20'a, 20b of the end pieces are extended by horizontal partitions such as 2l'a, 2lt situated inside the end pieces and the coil 27. These partitions separate that coil and these end pieces into n parallel channels 22a, 22b and they are constituted by insulating or conductive refractory materials, they prevent any interference flow of the liquid metal from top to bottom in the end pieces 29 and 29 and in the coil 27.
  • FIG. 4 is a second variant of the conductive coil 37 whose casing 38 is connected to the duct 1 by two end pieces 39 and 39'.
  • Each end piece 39, 39' comprises n equal openings, situated one below another, such as 30a, 30b and 30a, 30'b These openings are extended over the length of the end pieces only by horizontal partitions 31a, 31b and 3la, 31b dividing the end pieces into n parallel channels 32a, 32b and 32'a, 32'b
  • These partitions are made of refractory materials and prevent any parasite flow of liquid metal from top to bottom in the end pieces 30 and 39.
  • FIG. 5 is an end piece 49 comprising n openings a, 40b whose cross-sections decrease from the lower part of the end piece to the upper part, following the metal flow in the duct, to take into account the possible variant of the field along the duct.
  • the openings 40 are extended by horizontal partitions. End pieces of that type give excellent results and enable the electrical resistance of the coil on the end of which they are installed to be reduced as much as possible.
  • the applicant has manufactured end pieces whose openings were extended by inclined partitions, this having, in certain cases, improved the metal flow in the duct.
  • end pieces and the coil are manufactured separately, it is possible, in certain cases, to make this manufacturing easier, to manufacture simultaneously the end pieces, the casing of the coil and also the partitions, for example, by moulding in a same mould, so that the coil and end pieces then form only a single part.
  • liquid metal conduction pump which may be immersed in said metal and which includes:
  • a first magnetic circuit provided at its upper part with a first feed winding and at its lower part with an air gap within which a horizontal magnetic field is set up by energization of a first feed winding, a rectilinear duct extending vertically within said air gap for confining the liquid metal flow along a vertical axis crossing said air gap, a second magnetic circuit provided at its upper part with a second supply winding and a coil carried by said second magnetic circuit having an electrical current induced therein and having a middle plane portion extending through said air gap of said first magnetic circuit with the direction of the current being horizontal and orthogonal to the magnetic field in the section of liquid metal situated in said air gap.
  • said coil comprises a closed refractory casing intersecting said rectilinear duct and terminating at its ends in open end pieces sealingly overlying said openings within respective sides of said rectilinear duct with said refractory casing containing said liquid metal,
  • a continuous loop of liquid metal flowing in said duct at the level of said air gap acts as a low impedance closed loop conductor for causing a large current to flow across the flow path of the liquid metal passing axially within the rectilinear duct and at right angles to the magnetic flux path across the air gap.
  • each end piece of said casing is constituted by an extension of said casing.
  • each end piece comprises n openings separated by partitions dividing that end piece into n parallel channels.
  • each end piece of said casing is constituted by an extension of said casing.
  • each end piece of said casing is constituted by an extension of said casing.
  • each end piece comprises n openings separated by partitions dividing the coil and the end pieces into n parallel channels.
  • each end piece of said casing is constituted by an extension of said casing.
  • each end piece of said casing is to claim 7, wherein: the cross-section of the openings 5 constituted by an extension of Said Casingdecreases from the lower part of each end piece to the

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
US00317842A 1971-12-22 1972-12-22 Liquid metal conduction pump Expired - Lifetime US3837763A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7146211A FR2164493B1 (enrdf_load_stackoverflow) 1971-12-22 1971-12-22

Publications (1)

Publication Number Publication Date
US3837763A true US3837763A (en) 1974-09-24

Family

ID=9087903

Family Applications (1)

Application Number Title Priority Date Filing Date
US00317842A Expired - Lifetime US3837763A (en) 1971-12-22 1972-12-22 Liquid metal conduction pump

Country Status (10)

Country Link
US (1) US3837763A (enrdf_load_stackoverflow)
AU (1) AU448170B2 (enrdf_load_stackoverflow)
CH (1) CH564877A5 (enrdf_load_stackoverflow)
DE (2) DE7246814U (enrdf_load_stackoverflow)
FR (1) FR2164493B1 (enrdf_load_stackoverflow)
GB (1) GB1389860A (enrdf_load_stackoverflow)
IT (1) IT972584B (enrdf_load_stackoverflow)
NO (1) NO138963C (enrdf_load_stackoverflow)
SE (1) SE394349B (enrdf_load_stackoverflow)
SU (1) SU503565A3 (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973878A (en) * 1974-02-21 1976-08-10 Groupement pour les Activities Atomiques et Avancees "GAAA" Method and device for electromagnetic pumping by conduction of liquid metals having low electrical conductivity
US4143997A (en) * 1976-07-30 1979-03-13 Novatome Industries Electromagnetic induction pump for molten metal including impurities
US4286926A (en) * 1978-11-15 1981-09-01 Novatome Conduction pump for liquid metal
US4392786A (en) * 1980-10-16 1983-07-12 Merenkov Jury F Electromagnetic induction pump
US4818185A (en) * 1987-10-13 1989-04-04 The University Of Tennessee Research Corporation Electromagnetic apparatus operating on electrically conductive fluids
US5993164A (en) * 1995-05-18 1999-11-30 Diaz; Rodolfo E. Method and apparatus for an electromagnetic propulsion system

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2572867A1 (fr) * 1984-11-05 1986-05-09 Charykov Leonid Pompe electromagnetique

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756678A (en) * 1954-11-22 1956-07-31 Gen Electric Electromagnetic pump
US3115837A (en) * 1961-04-14 1963-12-31 Gen Dynamics Corp Electromagnetic pump
US3442217A (en) * 1967-05-19 1969-05-06 Atomic Energy Commission On-off switch for electromagnetic pump

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE837579C (de) * 1949-09-27 1952-04-28 Ver Leichtmetall Werke Ges Mit Verfahren und Vorrichtung zur Erzeugung von Druecken in Metallschmelzen, insbesondere zum Pumpen von Metallschmelzen
FR1336683A (fr) * 1962-04-27 1963-09-06 Pompe électromagnétique à induction
SU176184A1 (ru) * 1963-01-21 1965-10-26 В. П. Полищук , М. Р. Цин Электромагнитный индукционный насос

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2756678A (en) * 1954-11-22 1956-07-31 Gen Electric Electromagnetic pump
US3115837A (en) * 1961-04-14 1963-12-31 Gen Dynamics Corp Electromagnetic pump
US3442217A (en) * 1967-05-19 1969-05-06 Atomic Energy Commission On-off switch for electromagnetic pump

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973878A (en) * 1974-02-21 1976-08-10 Groupement pour les Activities Atomiques et Avancees "GAAA" Method and device for electromagnetic pumping by conduction of liquid metals having low electrical conductivity
US4143997A (en) * 1976-07-30 1979-03-13 Novatome Industries Electromagnetic induction pump for molten metal including impurities
US4286926A (en) * 1978-11-15 1981-09-01 Novatome Conduction pump for liquid metal
US4392786A (en) * 1980-10-16 1983-07-12 Merenkov Jury F Electromagnetic induction pump
US4818185A (en) * 1987-10-13 1989-04-04 The University Of Tennessee Research Corporation Electromagnetic apparatus operating on electrically conductive fluids
US5993164A (en) * 1995-05-18 1999-11-30 Diaz; Rodolfo E. Method and apparatus for an electromagnetic propulsion system
US6200102B1 (en) 1995-05-18 2001-03-13 Rodolfo E. Diaz Method and apparatus for an electromagnetic propulsion system

Also Published As

Publication number Publication date
CH564877A5 (enrdf_load_stackoverflow) 1975-07-31
AU5024272A (en) 1974-05-09
AU448170B2 (en) 1974-05-09
FR2164493B1 (enrdf_load_stackoverflow) 1975-02-21
SE394349B (sv) 1977-06-20
DE2262803A1 (de) 1973-06-28
DE7246814U (de) 1976-01-02
FR2164493A1 (enrdf_load_stackoverflow) 1973-08-03
NO138963C (no) 1978-12-13
GB1389860A (en) 1975-04-09
DE2262803B2 (de) 1975-02-06
IT972584B (it) 1974-05-31
NO138963B (no) 1978-09-04
SU503565A3 (ru) 1976-02-15
DE2262803C3 (de) 1975-09-11

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