EP0093397A1 - Ligne à retard hélicoidale pour tubes à propagation d'ondes et sa méthode de fabrication - Google Patents

Ligne à retard hélicoidale pour tubes à propagation d'ondes et sa méthode de fabrication Download PDF

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Publication number
EP0093397A1
EP0093397A1 EP83104124A EP83104124A EP0093397A1 EP 0093397 A1 EP0093397 A1 EP 0093397A1 EP 83104124 A EP83104124 A EP 83104124A EP 83104124 A EP83104124 A EP 83104124A EP 0093397 A1 EP0093397 A1 EP 0093397A1
Authority
EP
European Patent Office
Prior art keywords
ceramic
helix
inner mandrel
coil
core
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.)
Withdrawn
Application number
EP83104124A
Other languages
German (de)
English (en)
Inventor
Kuno Dipl.-Ing. Saatze
Richard Lauterbach
Aroon Sinha Roy
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.)
Siemens AG
Original Assignee
Siemens AG
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 Siemens AG filed Critical Siemens AG
Publication of EP0093397A1 publication Critical patent/EP0093397A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J23/00—Details of transit-time tubes of the types covered by group H01J25/00
    • H01J23/16—Circuit elements, having distributed capacitance and inductance, structurally associated with the tube and interacting with the discharge
    • H01J23/24—Slow-wave structures, e.g. delay systems
    • H01J23/26—Helical slow-wave structures; Adjustment therefor

Definitions

  • the invention relates to a helical delay line for traveling wave tubes, which is accommodated within a metallic vacuum envelope of the tube and is electrically insulated from it, and methods for its production.
  • the helical delay line is accommodated within the vacuum envelope with the aid of a number of dielectric holding rods arranged parallel to one another along surface lines of the line, in the interest of good heat dissipation from the coil to the vacuum envelope of the tube frequently the dielectric holding rods surrounding the coil can be in direct contact with the vacuum envelope of the tube.
  • the manufacturing tolerances of the helix, the holding rods and the vacuum envelope the difficulty of a vibration-insensitive fixed mounting of the helix arrangement arises.
  • the invention has for its object to provide a helical delay line that is simpler in construction and also easier to manufacture. Furthermore, a simple manufacturing process is to be specified.
  • the delay line according to the invention is characterized in that a coil consisting of metal wire or metal band is embedded in a hollow cylindrical ceramic body which is surrounded by a metallic vacuum envelope.
  • a simple method for producing such a helical delay line consists in that the hollow cylindrical ceramic body is formed by extrusion coating, pouring in or casting around the ceramic mass of the helix attached to a removable mandrel or core.
  • the helix is applied to a rotatable inner mandrel, the ceramic mass being sprayed in layers on the helix into a ceramic body by rotating the inner mandrel and relative movement between the spray nozzle and inner mandrel in the axial direction. So that no layer can grow on the inner mandrel, spraying is carried out at a certain angle, which depends on the wire diameter and the pitch of the coil.
  • the inner mandrel is preferably made of a non-wetting plastic or the inner mandrel is coated with a releasable agent before the filament is applied, which prevents the innermost ceramic layer from adhering to it.
  • the inner mandrel carries a thread adapted to the shape of the helix, which is provided with a suitable release agent and in the grooves of which the metal wire or the metal strip is wound, and that the inner mandrel is removed by turning after the extrusion coating of the helix.
  • the inner mandrel is at least partially designed as a lost core, which is removed by turning, loosening, melting or evaporating after the helix is coated with ceramic material.
  • the metal jacket forming the metallic vacuum envelope can be glued to the outside of the ceramic body.
  • a particularly good heat transfer results from the fact that the surface of the hollow cylindrical ceramic body is ground and a copper layer is sprayed onto it and that a tubular solid copper sheet is shrunk onto this copper layer as a metallic vacuum envelope.
  • a simple method for encapsulation is characterized in that the metal wire or the metal strip is wound on a thread core adapted to the shape of the helix, which is coated with a separating agent or consists of a non-wetting material, that the thread core carrying the helix is set up vertically and from a metal tube forming the metallic vacuum envelope is surrounded concentrically and that the space between the threaded core and the metal tube is poured out with a pourable ceramic mass.
  • the metal tube to the thread core is preferably centered by a lower sealing and centering ring.
  • the hollow cylindrical ceramic body is formed from a soaked ceramic paper by wrapping the. Coil on a removable core or mandrel.
  • Figure 1 shows in the lower part a section through a delay line with a coil 1, which is housed within a metallic vacuum envelope 2.
  • the coil for example made of copper wire, is embedded in a thermally sprayed hollow cylindrical ceramic body 3.
  • the coil can also consist of molybdenum or tungsten, the surface being covered with a good electrical conductor, for example Cu, Ag, Au, Al and Al alloys.
  • the overmolding results in a and positive connection between coil 1 and ceramic body 3, so that good heat transfer is guaranteed.
  • the heat dissipation into the vacuum envelope 2 can be further improved by thermally spraying a copper layer 4 onto the ceramic body 3, which is connected to the vacuum envelope 2 either with a material fit or with a force fit.
  • the vacuum envelope 2 is formed, for example, by shrinking on a copper sleeve or the like.
  • the prefabricated coil 1 is applied to an inner mandrel 5 during manufacture.
  • the surface of the helix 1 is expediently sandblasted for the time being and then provided with an adhesive layer 6 made of Ni / NiAl. This can be done with the aid of a device shown in FIG.
  • this adhesive layer 6 a cover layer is injected basis of Al203 at an angle of about 30 0 7 so can grow a layer on the inner mandrel. 5
  • the spray angle ⁇ depends on the wire thickness and the helix pitch.
  • the inner mandrel 5 must be coated with an agent which prevents the spray layer from sticking.
  • This means can also consist of a removable material.
  • the cover layer growing on the base cover layer 7 can then be sprayed at an angle of 90 ° to the axis of rotation, with relative movement between the inner mandrel 5 and the spray nozzle ensuring that the ceramic layer grows in a uniform layer.
  • the cylindrical surface is ground and then the copper layer 4 is sprayed on to improve the heat transfer with the aid of the device according to FIG. 2, on which a tube is then placed shaped solid copper sheet is shrunk as a metallic vacuum envelope 2.
  • FIG. 2 shows, the part of the helix 1 that is not to be coated is covered with a disk-shaped cover 11.
  • the other end of the helix 1 is covered with the aid of a sliding sleeve 8 which can be moved on a receiving star 9.
  • the outer surfaces of the disk-shaped cover 7 and the sliding sleeve 8 are expediently covered with adhesive tapes 10.
  • the metal wire being wound into the grooves of the thread of the inner mandrel 12.
  • the grooves and the pitch of the thread of the inner mandrel 12 are adapted to the shape of the helix 1, the surface between the individual turns of the helix 1 being able to be determined by using trapezoidal or rectangular grooves of the thread in cross section.
  • two rings 13 are attached, which limit the lateral shape of the ceramic body 3 to be sprayed.
  • the layers described in connection with FIGS. 1 and 2 are then applied with the aid of a plasma spray gun 15 movable in the direction of arrow 14, so that the ceramic body 3 according to FIG. 3 is finally produced.
  • the inner mandrel 12 can consist, for example, of a non-wetting plastic. However, it can also be coated with a releasable agent which prevents the innermost ceramic layer from sticking before the filament 1 is applied. Preferably, however, the inner mandrel 5 is at least partially formed as a lost core, which is removed by turning, loosening, melting or evaporating after the helix 1 has been coated with ceramic material.
  • the surface of the ceramic body 3 is indicated in FIG. 4 with a dashed line. It may be possible to dispense with processing this surface if the metal shell forming the vacuum envelope 2 is glued on. However, this jacket can also be shrunk on as in the exemplary embodiment according to FIG. 2, it being expedient that the surface of the ceramic body 3 is then provided with a corresponding, highly heat-conducting metal layer.
  • FIG. 5 shows a further production method for the delay line shown in FIG. 3, the same reference numerals as previously provided for parts having the same effect.
  • the helix 1 is cast around with ceramic mass 17 and thus the ceramic body 3 according to FIG. 3 is achieved.
  • a thread core 18 is used, which is held in a base 19.
  • the copper wire forming the helix 1 is wound into the grooves of the thread core 18.
  • the thread core 18 is around the shaft a sealing or centering ring 20, and then placed inverted on the vacuum envelope 2 forming metal pipe, the sealing or centering ring 20 not only seals but also to center the V a kuumhülle 2 is used.
  • the space between the helix 1 or thread core 18 and the vacuum envelope 2 is then filled with pourable ceramic, as indicated by a vessel 21 in FIG. 5.
  • the threaded core 18 is unscrewed, for example, or else removed in another way if it is designed as a lost core. If the thread core is to be unscrewed, it must be coated with a release agent before the metal wire is wound up.
  • a castable ceramic based on A1 2 0 3 is also used.
  • FIGS. 6 and 7 show another manufacturing method, namely a thread core 22 is again used, the effective area of which is limited by rings 23 applied to it.
  • the area between the rings 23 is then filled with ceramic paper lamenate by wrapping the coil 1.
  • the surface between the individual turns can be designed accordingly, as shown in particular in FIG. 7.
  • the thread of the thread core 22 is preferably provided with a separating film 25 before the metal wire is wound up. Instead of a release film 25 or in addition, any other release agent can also be used.
EP83104124A 1982-05-03 1983-04-27 Ligne à retard hélicoidale pour tubes à propagation d'ondes et sa méthode de fabrication Withdrawn EP0093397A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3216532 1982-05-03
DE19823216532 DE3216532A1 (de) 1982-05-03 1982-05-03 Wendelfoermige verzoegerungsleitung fuer wanderfeldroehren und verfahren zu ihrer herstellung

Publications (1)

Publication Number Publication Date
EP0093397A1 true EP0093397A1 (fr) 1983-11-09

Family

ID=6162601

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104124A Withdrawn EP0093397A1 (fr) 1982-05-03 1983-04-27 Ligne à retard hélicoidale pour tubes à propagation d'ondes et sa méthode de fabrication

Country Status (3)

Country Link
EP (1) EP0093397A1 (fr)
JP (1) JPS58204442A (fr)
DE (1) DE3216532A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115155730A (zh) * 2022-07-26 2022-10-11 安徽爱生中药饮片有限公司 一种苍耳加工装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR984595A (fr) * 1949-02-14 1951-07-09 Csf Tube à propagation d'onde comportant une ligne à retard en forme d'hélice enrobée de verre ou quartz
US2706366A (en) * 1950-11-25 1955-04-19 Bell Telephone Labor Inc Method of constructing a helix assembly
FR1100060A (fr) * 1955-03-11 1955-09-15 Thomson Houston Comp Francaise Structure de ligne de transmission à retard pour tubes à ondes progressives
FR1138421A (fr) * 1954-11-03 1957-06-13 Sylvania Electric Prod Tube de précision en matière vitreuse et son procédé de fabrication
US3519964A (en) * 1968-07-26 1970-07-07 Microwave Ass High power slow wave circuit
GB1205928A (en) * 1966-11-30 1970-09-23 Standard Telephones Cables Ltd Method of manufacturing a travelling wave tube helix
FR2451642A1 (fr) * 1979-03-16 1980-10-10 Hughes Aircraft Co Procede de fabrication d'une ligne a retard a structure en helice, et cette ligne a retard
US4268778A (en) * 1969-12-10 1981-05-19 Louis E. Hay Traveling wave device with unific slow wave structure having segmented dielectric support

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR984595A (fr) * 1949-02-14 1951-07-09 Csf Tube à propagation d'onde comportant une ligne à retard en forme d'hélice enrobée de verre ou quartz
US2706366A (en) * 1950-11-25 1955-04-19 Bell Telephone Labor Inc Method of constructing a helix assembly
FR1138421A (fr) * 1954-11-03 1957-06-13 Sylvania Electric Prod Tube de précision en matière vitreuse et son procédé de fabrication
FR1100060A (fr) * 1955-03-11 1955-09-15 Thomson Houston Comp Francaise Structure de ligne de transmission à retard pour tubes à ondes progressives
GB1205928A (en) * 1966-11-30 1970-09-23 Standard Telephones Cables Ltd Method of manufacturing a travelling wave tube helix
US3519964A (en) * 1968-07-26 1970-07-07 Microwave Ass High power slow wave circuit
US4268778A (en) * 1969-12-10 1981-05-19 Louis E. Hay Traveling wave device with unific slow wave structure having segmented dielectric support
FR2451642A1 (fr) * 1979-03-16 1980-10-10 Hughes Aircraft Co Procede de fabrication d'une ligne a retard a structure en helice, et cette ligne a retard

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115155730A (zh) * 2022-07-26 2022-10-11 安徽爱生中药饮片有限公司 一种苍耳加工装置
CN115155730B (zh) * 2022-07-26 2023-08-04 安徽爱生中药饮片有限公司 一种苍耳加工装置

Also Published As

Publication number Publication date
DE3216532A1 (de) 1983-11-03
JPS58204442A (ja) 1983-11-29

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19831213

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Effective date: 19850924

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SAATZE, KUNO, DIPL.-ING.

Inventor name: SINHA ROY, AROON

Inventor name: LAUTERBACH, RICHARD