EP1351278A2 - Lampe à halogénure métallique avec enveloppe céramique - Google Patents

Lampe à halogénure métallique avec enveloppe céramique Download PDF

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Publication number
EP1351278A2
EP1351278A2 EP03006301A EP03006301A EP1351278A2 EP 1351278 A2 EP1351278 A2 EP 1351278A2 EP 03006301 A EP03006301 A EP 03006301A EP 03006301 A EP03006301 A EP 03006301A EP 1351278 A2 EP1351278 A2 EP 1351278A2
Authority
EP
European Patent Office
Prior art keywords
metal halide
halide lamp
diameter
discharge vessel
wire
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.)
Granted
Application number
EP03006301A
Other languages
German (de)
English (en)
Other versions
EP1351278B1 (fr
EP1351278A3 (fr
Inventor
Roland Hüttinger
Stefan Dr. Juengst
Ruediger Dr. Klam
Dieter Lang
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.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
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 Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1351278A2 publication Critical patent/EP1351278A2/fr
Publication of EP1351278A3 publication Critical patent/EP1351278A3/fr
Application granted granted Critical
Publication of EP1351278B1 publication Critical patent/EP1351278B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/02—Details
    • H01J61/36—Seals between parts of vessels; Seals for leading-in conductors; Leading-in conductors
    • H01J61/366—Seals for leading-in conductors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J61/00—Gas-discharge or vapour-discharge lamps
    • H01J61/82—Lamps with high-pressure unconstricted discharge having a cold pressure > 400 Torr
    • H01J61/827—Metal halide arc lamps

Definitions

  • the invention is based on a metal halide lamp with a ceramic Discharge vessel according to the preamble of claim 1 in particular lamps with an output of at least 70 W, preferably from 100 W up to powers over 1000 W.
  • EP-A 587 238 describes a metal halide lamp with a ceramic discharge vessel known, in which a two-part implementation in an elongated Stopper capillary by means of glass solder at the end of the Plug is sealed.
  • the outer part of the bushing is permeable Material (niobium stick), the inner part made of halide-resistant material (for example a pen made of tungsten or molybdenum).
  • the inner part 8 can have an envelope by the pin with a Spiral part is wrapped.
  • the concept presented in this document however, it is only suitable for smaller outputs up to 150 W. poor adaptation of the thermal expansion coefficient leads at high outputs and correspondingly high temperature changes often to cracks in the wall of the ceramic capillary tube. This Cracks increase with increasing diameter of the molybdenum stick.
  • a Similar solution is also described in WO 95/28732.
  • the discharge vessel has two ends, which are closed with ceramic plugs are (underneath is a separate part or an integral part of the discharge vessel trained part to understand), each an elongated capillary tube (hereinafter called stopper capillary), and by this Plug capillary is an electrically conductive two-part bushing that is covered on the discharge from an inner part and an outer pin-shaped Part exists, is led through vacuum-tight.
  • the implementation is sealed on the outside of the stopper by glass solder. Implementation is inside an electrode with its shaft attached to the inside of the discharge vessel protrudes.
  • the inner part of the bushing contains a pin made of a halide resistant Metal (preferably molybdenum or tungsten or their alloys), whose diameter is a maximum of 0.5 mm, and that of one multilayer spiral, preferably a double layer, the same or equivalent material is encased.
  • the material is preferably molybdenum for both the core pin and the multi-layer spiral.
  • the bottom line is that all of these helix geometries cool down after the melting process due to the different expansion coefficients the implementation, especially the spiral, and the surrounding ceramics, i.e. the capillary and the one that passes on its pressure Enamel ceramic / glass solder, come under pressure.
  • This Tensions have to be reduced by a single plastic deformation, by pushing the spiral into the core pin. It is advantageous here the smallest possible contact area.
  • a similarly effective stress relief is conveyed if instead of several Layers a wound spiral wire is used. In this case arises even a particularly high pressure in the area of the contact surfaces on Core wire and on the inner wire because of the diameter of the core wire slightly smaller than that of the helical inner wire can.
  • the diameter w of the wrapping wire is preferably 30 to 70% of the diameter W of the helix wire.
  • the outer part of the feedthrough is located in the stopper capillary Length sealed with glass solder.
  • the maximum diameter of the core pin is less than or equal to 0.5 mm and that the diameter of the layers of the helix wire corresponds to the diameter of the core pin.
  • the diameter of each layer is preferably smaller than that of the core pin. The diameters of the two layers do not have to be the same.
  • the lamp power is preferably between 100 and 1000 W, however also larger powers (2000 W and more) as well as smaller powers (for example 70 W) are possible.
  • d 1 + d 2 2 d.
  • the diameter of the core pin should preferably be at most 0.35 mm.
  • a well-coordinated relationship between spiral wire and core pin lies in the area (0.90 K - D) / 4 ⁇ d ⁇ (0.96 K - D) / 4.
  • the present invention uses a two-part implementation, consisting of an outer part which is adapted to the (aluminum oxide) ceramic in terms of its thermal expansion and is permeable to H 2 and O 2 (in particular a pin or tube made of niobium, but the use of tantalum is also possible) which is covered and sealed with glass solder, and an inner part which is halide-resistant and which is only partially covered and sealed with glass solder at its outer end.
  • the inner part is a very thin wire made of molybdenum or of the higher melting tungsten.
  • the tungsten can have a rhenium additive, either as an alloy or as a surface plating. The rhenium increases the high temperature resistance and corrosion resistance of the tungsten. While molybdenum is particularly suitable for fillings containing mercury, W is advantageously used for fillings free of mercury. In particular, W is also suitable for relatively small watt lamps from 70 W.
  • the inner part is on one side with the outer part (niobium stick or tube) and connected to the electrode on the other side.
  • the stopper can be made in one part, but also in several parts. For example can in a manner known per se a stopper capillary from an annular Be part of the plug.
  • the outer part is inserted deep into the capillary. It's just one Minimum depth of 2 mm necessary for a reliable seal. The maximum insertion depth should preferably be 50% of the thermal reasons Do not exceed the length of the capillary.
  • the outer part is over its length located in the stopper capillary completely melted into the glass solder, the inner part over a length from about 1 to 2 mm at its outer end. It is important that the niobium stick due to the corrosive attack of the filling on niobium completely by glass solder is covered.
  • FIG. 1 shows schematically a metal halide lamp with an output of 150 W shown. It consists of a lamp axis defining cylindrical outer bulb 1 made of quartz glass, squeezed on two sides (2) and is socketed (3).
  • the axially arranged discharge vessel 4 made of A1203 ceramic is cylindrical or bulbous in shape and has two ends 6. It is by means of two power leads 7, which with the base parts 3 over foils 8 are connected, held in the outer bulb 1.
  • the power supply lines 7 are welded to bushings 9, 10, each in an end plug 12 are fitted at the end 6 of the discharge vessel.
  • the plug part is as an elongated capillary tube 12 (capillary) executed.
  • the end 6 of the discharge vessel and the stopper capillary 12 are, for example, together sintered directly.
  • the bushings 9, 10 each consist of two parts.
  • the outer part 13 is designed as a niobium stick and extends up to about a quarter of the Length of the capillary tube 12 into this.
  • the inner part 14 extends within the capillary tube 12 towards the discharge volume. It stops on the discharge side Electrodes 15, consisting of an electrode shaft 16 Tungsten and one pushed onto the discharge end of the shaft Spiral 17.
  • the inner part 14 of the implementation, specifically the core pin, is in each case with the electrode shaft 15 and with the outer Part 13 of the bushing welded.
  • the discharge vessel is filled, e.g. Argon, from mercury and additives to metal halides.
  • a metal halide filling without Mercury, preferably xenon and in particular a high ignition gas Pressure well above 1.3 bar can be selected.
  • FIG. 2 An end region of the discharge vessel is shown in detail in FIG. 2.
  • 10 serves a system consisting of a niobium stick (or also tube) as outer part 13 with a diameter A and a thin one Molybdenum pin 18 (diameter B, see table below) 1) as part of the inner part 14, over the two layers of a molybdenum coil 20 are each pushed with a wire diameter C.
  • the total length of the capillary tube 12 is about 17 mm, that of the niobium stick 13 D, and that of the inner part 14 is E, with an inner diameter of the stopper capillary from F.
  • the niobium pin 13 is on the discharge side with the core pin 18 made of molybdenum butt welded.
  • the core pin 18 is the same on the discharge side Way welded to the electrode shaft 16.
  • the niobium pin 13 is inserted approximately 3 mm deep into the capillary 12 and sealed by means of glass solder 19. It is important that the glass solder completely covers this niobium stick and that the beginning of the inner part (1 to 2 mm) is still covered by the glass solder.
  • Nb pin diameter (mm) A 0.88 1.00 1.30 Diameter of Mo core pin (mm) B 0.25 0.30 0.30 Diameter of Mo coil (mm) C 0.15 0.18 0.25 Length of Nb pin (mm) D 8th 10 12 Inner part length (mm) e 10 13 17 Min. Inner diameter of capillary tube (mm) F 0.90 1.05 1.35
  • Tab. 2 shows the typical inside diameter of the capillary tube as well as the minimum and maximum permissible diameters of the core pin 18 (D) and the helix 20 (d) for different performance levels.
  • the same diameter is assumed for both layers, which is often the simplest and best solution.
  • the diameter of the two layers can also be different, in particular the diameter of the outer layer can be selected to be significantly smaller (30% and more) than that of the inner layer. power stage typ.
  • Table 3 is a preferred one for different power levels Range given for the values discussed in Table 2.
  • Table 4 shows an optimal value for D and d for specific wattages.
  • the core wire has a diameter of 0.35 mm and the coiled wire a diameter of 0.29 mm.
  • a double-spiral spiral (cc) is used in single or double position.
  • the simple location a double helix corresponds to approximately three times Location of a single helix.
  • the core wire of the spiral which acts formally as a middle layer, usually a larger diameter than the wire spun on it, the inner and outer layer forms.
  • the molybdenum core wire 25 has a diameter of 0.35 mm for a 1000 W lamp.
  • the cc coil (one layer) applied thereon has an inner pin 26 (core wire of the coil) with a diameter of 0.35 mm (formally middle layer) and a wire spun thereon with a diameter of 0.25 mm, which thus formally inner and outer layer 27 and 28 forms.
  • the double layer of a double helix corresponds approximately a formal sixfold layer of a simple spiral. It is in each case the diameter of the layers varies.
  • each layer is a double helix (cc) with core wire.
  • the Dimensions of the two layers can be different.
  • the first layer has a first core pin 31 (formally it forms the second layer) around which one Coil is wound, which formally form the first and third layers 32, 33.
  • the second layer has a second core pin 34 (formal fifth layer), around which a coil is wound, which formally is the fourth and sixth layer 35, 36 forms.
  • Table 8 shows the dimensions of the core pin and the wound coil (one layer of a cc coil) for 150 - 400 W. The latter is only one layer on the core pin in these embodiments.
  • a concrete example is a 150 W lamp with a feedthrough that has a Mo part, in which the core wire has a diameter of 0.3 mm, while the helical wire has an inner winding wire of 0.13 mm diameter, which with a thin wire of 0.07 mm diameter is wound. Formally, this results in a three-layer spiral with any number of crossing points.
  • the advantage of this embodiment is in particular that the core wire also has only contact points with the coil, while in the sc versions the innermost layer has a continuous contact surface on the core wire. This example corresponds to the illustration in FIG. 4.

Landscapes

  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
EP03006301A 2002-04-03 2003-03-19 Lampe à halogénure métallique avec enveloppe céramique Expired - Lifetime EP1351278B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10214777 2002-04-03
DE10214777A DE10214777A1 (de) 2002-04-03 2002-04-03 Metallhalogenidlampe mit keramischem Entladungsgefäß

Publications (3)

Publication Number Publication Date
EP1351278A2 true EP1351278A2 (fr) 2003-10-08
EP1351278A3 EP1351278A3 (fr) 2006-06-07
EP1351278B1 EP1351278B1 (fr) 2007-05-09

Family

ID=27816122

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03006301A Expired - Lifetime EP1351278B1 (fr) 2002-04-03 2003-03-19 Lampe à halogénure métallique avec enveloppe céramique

Country Status (7)

Country Link
US (1) US20030189406A1 (fr)
EP (1) EP1351278B1 (fr)
JP (1) JP4299039B2 (fr)
CN (1) CN100426449C (fr)
AT (1) ATE362195T1 (fr)
CA (1) CA2424099A1 (fr)
DE (2) DE10214777A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009085421A1 (fr) 2007-12-26 2009-07-09 General Electric Company Lampe à halogénure métallique céramique miniature, ayant des pattes fines
US7952284B2 (en) 2005-01-19 2011-05-31 Koninklijke Philips Electronics N.V. High-pressure discharge lamp

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003220991A1 (en) * 2002-03-29 2003-10-13 Matsushita Electric Industrial Co., Ltd. Discharge lamp and method for producing the same, and lamp unit
JP4929961B2 (ja) * 2006-10-06 2012-05-09 ウシオ電機株式会社 高圧水銀ランプ
US8089212B2 (en) * 2008-08-08 2012-01-03 General Electric Company Lower turn per inch (TPI) electrodes in ceramic metal halide (CMH) lamps
US20150084501A1 (en) * 2013-09-25 2015-03-26 General Electric Company Electrode design in a ceramic metal halide (cmh) lamp

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0926703A2 (fr) * 1997-12-26 1999-06-30 Matsushita Electronics Corporation Lampe à décharge à vapeur métallique
EP1037256A1 (fr) * 1999-03-16 2000-09-20 Matsushita Electronics Corporation Lampe à halogénure métallique
DE10026802A1 (de) * 2000-05-31 2002-01-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidlampe mit keramischem Entladungsgefäß
EP1220296A1 (fr) * 2000-12-28 2002-07-03 General Electric Company Conducteur d'alimentation permettant une isolation thermique pour les électrodes d'une lampe en matériau céramique à halogénure métallique

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US4742269A (en) * 1984-11-09 1988-05-03 Ngk Insulators, Ltd. Ceramic envelope device for high-pressure discharge lamp
DE3923589A1 (de) * 1989-07-17 1991-01-24 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe
US5424609A (en) * 1992-09-08 1995-06-13 U.S. Philips Corporation High-pressure discharge lamp
DE4242123A1 (de) * 1992-12-14 1994-06-16 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Hochdruckentladungslampe mit einem keramischen Entladungsgefäß
JP3638719B2 (ja) * 1996-06-10 2005-04-13 ハリソン東芝ライティング株式会社 セラミックス放電ランプ，ランプ装置，点灯装置および液晶プロジェクター
JPH10188901A (ja) * 1996-12-26 1998-07-21 Ushio Inc セラミック製放電ランプ
JPH10284003A (ja) * 1997-03-31 1998-10-23 Toshiba Lighting & Technol Corp 高圧放電ランプおよび照明装置
DE19727430A1 (de) * 1997-06-27 1999-01-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidlampe mit keramischem Entladungsgefäß
DE19727428A1 (de) * 1997-06-27 1999-01-07 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidlampe mit keramischem Entladungsgefäß
WO1999054906A1 (fr) * 1998-04-16 1999-10-28 Toshiba Lighting & Technology Corporation Lampe a decharge electrique a haute pression et dispositif d'eclairage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0926703A2 (fr) * 1997-12-26 1999-06-30 Matsushita Electronics Corporation Lampe à décharge à vapeur métallique
EP1037256A1 (fr) * 1999-03-16 2000-09-20 Matsushita Electronics Corporation Lampe à halogénure métallique
DE10026802A1 (de) * 2000-05-31 2002-01-03 Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh Metallhalogenidlampe mit keramischem Entladungsgefäß
EP1220296A1 (fr) * 2000-12-28 2002-07-03 General Electric Company Conducteur d'alimentation permettant une isolation thermique pour les électrodes d'une lampe en matériau céramique à halogénure métallique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7952284B2 (en) 2005-01-19 2011-05-31 Koninklijke Philips Electronics N.V. High-pressure discharge lamp
WO2009085421A1 (fr) 2007-12-26 2009-07-09 General Electric Company Lampe à halogénure métallique céramique miniature, ayant des pattes fines

Also Published As

Publication number Publication date
JP2003297288A (ja) 2003-10-17
CN1450589A (zh) 2003-10-22
ATE362195T1 (de) 2007-06-15
CN100426449C (zh) 2008-10-15
EP1351278B1 (fr) 2007-05-09
CA2424099A1 (fr) 2003-10-03
US20030189406A1 (en) 2003-10-09
DE50307213D1 (de) 2007-06-21
JP4299039B2 (ja) 2009-07-22
DE10214777A1 (de) 2003-10-16
EP1351278A3 (fr) 2006-06-07

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