EP0479088B1 - High pressure discharge lamp and method for producing the same - Google Patents
High pressure discharge lamp and method for producing the same Download PDFInfo
- Publication number
- EP0479088B1 EP0479088B1 EP91116146A EP91116146A EP0479088B1 EP 0479088 B1 EP0479088 B1 EP 0479088B1 EP 91116146 A EP91116146 A EP 91116146A EP 91116146 A EP91116146 A EP 91116146A EP 0479088 B1 EP0479088 B1 EP 0479088B1
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- European Patent Office
- Prior art keywords
- hollow
- cylindrical
- tubes
- discharge space
- tube
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- 238000004519 manufacturing process Methods 0.000 title description 3
- 238000007789 sealing Methods 0.000 claims description 30
- 239000011888 foil Substances 0.000 claims description 26
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 22
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 11
- 229910052750 molybdenum Inorganic materials 0.000 claims description 11
- 239000011733 molybdenum Substances 0.000 claims description 11
- 229910001507 metal halide Inorganic materials 0.000 claims description 9
- 150000005309 metal halides Chemical class 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 claims description 2
- 229910052753 mercury Inorganic materials 0.000 claims description 2
- 229910000679 solder Inorganic materials 0.000 claims description 2
- 239000000654 additive Substances 0.000 claims 1
- 229910052756 noble gas Inorganic materials 0.000 claims 1
- 210000003739 neck Anatomy 0.000 description 24
- 238000002844 melting Methods 0.000 description 7
- 230000008018 melting Effects 0.000 description 7
- 230000004907 flux Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000000155 melt Substances 0.000 description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 229910052721 tungsten Inorganic materials 0.000 description 2
- 239000010937 tungsten Substances 0.000 description 2
- 240000007817 Olea europaea Species 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000004031 devitrification Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000010327 methods by industry Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000010618 wire wrap Methods 0.000 description 1
Images
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
- H01J61/368—Pinched seals or analogous seals
Definitions
- the invention relates to a high-pressure discharge lamp for lamp currents greater than 20 A according to the preamble of claim 1.
- High-pressure discharge lamps of this type with a metal halide filling are used in particular for illuminating stages or for film and television recordings, where high luminous fluxes with daylight-like color temperature and very good color rendering are required.
- Other high-pressure discharge lamps of this type with a mercury gas filling are used in particular in the production of electronic components.
- Such a lamp with a metal halide filling is e.g. known from DE-PS 34 27 280.
- the high-pressure discharge lamp from this patent has a metal halide filling and, at an operating current of 65 A and a power consumption of 12,000 W, produces a luminous flux of 1,100,000 lm.
- the two pin-shaped electrodes are melted gas-tight into the lamp necks by means of a molybdenum sealing film.
- a high-pressure discharge lamp is known from EP-A-0 115 921, the electrode melts of which each have a plurality of sealing foils.
- the sealing foils are melted between the outer bulb neck and an inner quartz glass tube, the end of which faces the discharge space is sealed off.
- the discharge-side ends of the sealing foils are welded to the electrode shaft and are wrapped in a tungsten wire in the area of this welding transition. Due to the wire wrapping, fractures are prevented at these points during cooling despite the quartz glass being strongly pressed on.
- a flash gas discharge lamp for laser pumping is listed under application number SU-A-1092-608-A.
- the gas-tight melting of the electrodes takes place in this lamp by means of a molybdenum foil cylinder, in which three to eight sealing foils are embedded like corkscrews between the outer surface of a quartz glass insert and the outer bulb neck.
- the object of the invention is to provide a high-pressure discharge lamp, the electrode melts can be loaded with high operating currents without damage.
- the electrode seals should have a simple process engineering structure in accordance with the requirements.
- a high-pressure discharge lamp which has a structure in accordance with the characterizing features of claim 1. Further advantageous features of the lamp can be found in the subclaims.
- the construction of the piston necks from two nested hollow cylindrical quartz glass tubes, between which at least two, advantageously four, elongate sealing foils are melted in a gas-tight manner, results in a significantly lower current load for the individual sealing foil. If the sealing foils are arranged at equal intervals over the circumference of the inner hollow cylindrical quartz glass tube parallel to the longitudinal axis of the bulb neck, the neck is heated up evenly over the circumference during operation of the lamp. In this way, overloads in the melting due to large temperature differences can be prevented.
- the interior of the piston necks is hollow and, because the bases attached to the ends of the necks have a corresponding opening, air can flow through them. This enables additional heat dissipation from the bulb neck during lamp operation. This heat dissipation can be further reinforced by a rod made of heat-dissipating material, which protrudes in isolation into the hollow cylindrical opening of the piston neck.
- the structure of the lamp necks allows operating currents of up to 130 A without damaging the melts and thus reducing the average lamp life. With these high currents and power consumption of up to 24,000 W, high-pressure discharge lamps can be built that emit luminous fluxes of over 2 million lm with a metal halide fill.
- the invention also relates to a method for producing a high-pressure discharge lamp, as claimed in the claims.
- a hollow cylindrical outer tube made of quartz glass is first melted at the two ends lying in the axis after the rotationally symmetrical discharge space has been produced.
- a hollow cylindrical inner tube made of quartz glass is now pushed into each melted outer tube, which is closed at its end facing the discharge space and widens in an olive shape at its end facing away from the discharge space.
- This inner tube can now turn consist of two nested quartz glass tubes, the inner of the two tubes having the features listed above and the outer of the two tubes is open to the discharge space and is closed at its other end by fusion with the inner tube.
- the construction of the inner tube from two tubes offers the advantage that when the sealing films are subsequently melted, a visual check of the melting quality is made possible.
- the films are only melted well if the quartz glass of the two inner tubes has softened to such an extent that the outer contours of the tubes are no longer visible.
- the metal disc with the electrode and the sealing foils attached to it is placed on the end of the tube facing the discharge space.
- the outer edge of the olive-shaped end is fused to the inner wall of the outer tube.
- the sealing foils are melted gas-tight between the two tubes, a vacuum of 20 mbar argon being generated in the space between the two tubes and air pressure of 1 bar being generated in the interior of the hollow cylindrical inner tube.
- the end of the piston neck is separated with the olive-shaped end of the inner tube and the sealing foils are electrically connected to the base attached to the end of the neck.
- the lamp bulb 1 made of quartz glass consists of a largely cylindrical, rotationally symmetrical discharge space 2, at the two ends of which lie in the axis, a cylindrical bulb neck 3, 4 is melted.
- the two pin electrodes 5, 6 made of tungsten protrude into the discharge space 2 and are inserted with their shaft ends into a central hole in a circular cylindrical disk 7, 8 made of molybdenum and soldered firmly with platinum solder.
- the electrical connection of the pin electrodes 5, 6 with the bases 9, 10 of the type s 30x70, which are attached to the free ends of the piston necks 3, 4, is made by four band-shaped molybdenum sealing foils, of which only three each 11 to 16 are visible.
- the sealing foils 11 to 16 are welded at one end to the respective panes 7, 8 and at their other ends to the ones here not visible power supplies connected, which make electrical contact with the bases 9,10.
- the sealing foils 11 to 16 are sealed in a gas-tight manner between two hollow cylindrical quartz glass tubes from which the piston necks 3, 4 are composed.
- the two piston necks 3, 4 have a central bore 17, 18, which extends to just in front of the molybdenum disks 7, 8 and enables air convection in the piston necks 3, 4 through openings (not visible here) in the bases 9, 10.
- the piston neck consists of a hollow cylindrical outer tube 19 which is fused to the rotationally symmetrical discharge space 2.
- a hollow cylindrical inner tube made of quartz glass is pushed into the outer tube 19, which in turn consists of two tubes 20, 21 pushed into one another.
- the inner 20 of the two tubes 20, 21 is provided with a seal 22 at its end facing the discharge space 2 and has an olive-shaped extension 23 at its end facing away from the discharge space 2.
- the outer wall of the olive-shaped extension 23 touches the inner wall of the outer tube 19.
- the outer 21 of the two inner tubes is open to the discharge space 2 and is fused to the inner tube 20 at its end facing away from the discharge space 2 near the olive-shaped extension 23.
- the disc 8 made of molybdenum with the tungsten electrode 6 attached to it and the four welded molybdenum sealing foils, of which only two 14, 16 are visible, is placed on the inner tube consisting of the two tubes 20, 21 pushed into one another.
- the sealing foils 14, 16 run parallel to the axis of the piston neck between the outer tube 19 and the outer tube 20 of the inner tube.
- a hollow cylindrical tube piece 24 made of quartz glass is placed over the shaft of the pin electrode 6 and, after melting, provides a seal between the discharge space 2 and the molybdenum disk 8.
- the piston neck is shown in cross-section at point AB before the melting, looking in the direction of the discharge space.
- the figure shows the hollow cylindrical outer tube 19 and the two hollow cylindrical inner tubes 20, 21. In between, part of the molybdenum washer 8 and the four molybdenum sealing foils 14, 15, 16, 25 evenly distributed over the circumference of the inner tube 21 can be seen.
Landscapes
- Vessels And Coating Films For Discharge Lamps (AREA)
Description
Die Erfindung betrifft eine Hochdruckentladungslampe für Lampenströme größer 20 A gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a high-pressure discharge lamp for lamp currents greater than 20 A according to the preamble of claim 1.
Hochdruckentladungslampen dieser Art mit einer Metallhalogenidfüllung dienen insbesondere zur Beleuchtung von Bühnen oder bei Film- und Fernsehaufnahmen, wo hohe Lichtströme mit tageslichtähnlicher Farbtemperatur und sehr guter Farbwiedergabe benötigt werden. Andere Hochdruckentladungslampen dieser Art mit einer Quecksilber-Gas-Füllung werden insbesondere bei der Herstellung von elektronischen Bauteilen eingesetzt. Eine solche Lampe mit einer Metallhalogenidfüllung ist z.B. aus der DE-PS 34 27 280 bekannt. Die Hochdruckentladungslampe aus dieser Patentschrift besitzt eine Metallhalogenid-Füllung und erzeugt bei einer Betriebsstromstärke von 65 A und einer Leistungsaufnahme von 12 000 W einen Lichtstrom von 1 100 000 lm. Die beiden stiftförmig ausgeführten Elektroden sind mittels jeweils einer Molybdän-Dichtungsfolie gasdicht in die Lampenhälse eingeschmolzen.High-pressure discharge lamps of this type with a metal halide filling are used in particular for illuminating stages or for film and television recordings, where high luminous fluxes with daylight-like color temperature and very good color rendering are required. Other high-pressure discharge lamps of this type with a mercury gas filling are used in particular in the production of electronic components. Such a lamp with a metal halide filling is e.g. known from DE-PS 34 27 280. The high-pressure discharge lamp from this patent has a metal halide filling and, at an operating current of 65 A and a power consumption of 12,000 W, produces a luminous flux of 1,100,000 lm. The two pin-shaped electrodes are melted gas-tight into the lamp necks by means of a molybdenum sealing film.
Untersuchungen an einer solchermaßen aufgebauten Metallhalogenid-Hochdruckentladungslampe, die zur Erzielung höherer Lichtströme noch stärker belastet wurde, haben gezeigt, daß diese Art der Einschmelzung höchstens Betriebsströme von 100 A zuläßt. Höhere Betriebsströme führen zu einer so starken Erhitzung der Einschmelzung, daß eine Folienkorrosion einsetzt und Folienabhebungen auftreten. Durch die Metallhalogenid-Füllung der Lampe wird außerdem eine Entglasung in Gang gesetzt, so daß sich eine sehr kurze mittlere Lebensdauer für die Lampe ergibt.Investigations on a metal halide high-pressure discharge lamp constructed in this way, which was subjected to even greater stress in order to achieve higher luminous fluxes, have shown that this type of melting allows a maximum operating current of 100 A. Higher operating currents lead to such a strong heating of the Melting that film corrosion begins and film lifting occurs. The metal halide filling of the lamp also initiates devitrification, so that the lamp has a very short average life.
Aus der EP-A- 0 115 921 ist eine Hochdruckentladungslampe bekannt, deren Elektrodeneinschmelzungen jeweils mehrere Dichtungsfolien aufweisen. Die Dichtungsfolien sind dabei zwischen den äußeren Kolbenhals und ein inneres Quarzglasrohr, dessen dem Entladungsraum zugewandtes Ende abgeschlossen ist, eingeschmolzen. Die entladungsseitigen Enden der Dichtungsfolien sind auf den Elektrodenschaft geschweißt und im Bereich dieses Schweißübergangs von einem Wolframdraht umwickelt. Durch die Drahtumwicklung werden bei der Abkühlung Bruchstellen trotz starken Anpressens des Quarzglases an diesen Stellen verhindert.A high-pressure discharge lamp is known from EP-A-0 115 921, the electrode melts of which each have a plurality of sealing foils. The sealing foils are melted between the outer bulb neck and an inner quartz glass tube, the end of which faces the discharge space is sealed off. The discharge-side ends of the sealing foils are welded to the electrode shaft and are wrapped in a tungsten wire in the area of this welding transition. Due to the wire wrapping, fractures are prevented at these points during cooling despite the quartz glass being strongly pressed on.
In den Soviet Inventions Illustrated, Section El von Dervent vom 20.2.1985 ist unter der Anmeldenummer SU-A-1092-608-A eine Blitz-Gasentladungslampe zum Laserpumpen aufgeführt. Die gasdichte Einschmelzung der Elektroden erfolgt bei dieser Lampe mittels eines Molybdänfolien-Zylinders, bei dem drei bis acht Dichtungsfolien korkenzieherartig zwischen die Mantelfläche eines Quarzglaseinschubs und den äußeren Kolbenhals eingebettet sind.In the Soviet Inventions Illustrated, Section El by Dervent from February 20, 1985, a flash gas discharge lamp for laser pumping is listed under application number SU-A-1092-608-A. The gas-tight melting of the electrodes takes place in this lamp by means of a molybdenum foil cylinder, in which three to eight sealing foils are embedded like corkscrews between the outer surface of a quartz glass insert and the outer bulb neck.
Aufgabe der Erfindung ist es, eine Hochdruckentladungslampe zu schaffen, dessen Elektrodeneinschmelzungen ohne Schaden mit hohen Betriebsströmen belastet werden können. Die Elektrodeneinschmelzungen sollten dabei einen den Anforderungen entsprechend verfahrenstechnisch einfachen Aufbau besitzen.The object of the invention is to provide a high-pressure discharge lamp, the electrode melts can be loaded with high operating currents without damage. The electrode seals should have a simple process engineering structure in accordance with the requirements.
Die Aufgabe wird durch eine Hochdruckentladungslampe, die einen Aufbau gemäß den kennzeichnenden Merkmalen des Anspruchs 1 besitzt, gelöst. Weitere vorteilhafte Merkmale der Lampe sind den Unteransprüchen zu entnehmen.The object is achieved by a high-pressure discharge lamp which has a structure in accordance with the characterizing features of claim 1. Further advantageous features of the lamp can be found in the subclaims.
Durch den Aufbau der Kolbenhälse aus zwei ineinandergeschobenen hohlzylindrischen Quarzglasrohren, zwischen die mindestens zwei, vorteilhaft vier längliche Dichtungsfolien gasdicht eingeschmolzen sind, ergibt sich für die einzelne Dichtungsfolie eine wesentlich geringere Strombelastung. Werden die Dichtungsfolien mit gleichen Abständen über den Umfang des inneren hohlzylindrischen Quarzglasrohrs parallel zur Längsachse des Kolbenhalses angeordnet, so wird der Hals im Betrieb der Lampe völlig gleichmäßig über den Umfang aufgeheizt. Dadurch können Überlastungen in der Einschmelzung aufgrund großer Temperaturunterschiede verhindert werden. Die Metallscheibe, mit dessen Rand die Dichtungsfolien elektrisch verbunden sind und an der der Elektrodenschaft befestigt ist, verleiht der gesamten Konstruktion eine sehr große Stabilität.The construction of the piston necks from two nested hollow cylindrical quartz glass tubes, between which at least two, advantageously four, elongate sealing foils are melted in a gas-tight manner, results in a significantly lower current load for the individual sealing foil. If the sealing foils are arranged at equal intervals over the circumference of the inner hollow cylindrical quartz glass tube parallel to the longitudinal axis of the bulb neck, the neck is heated up evenly over the circumference during operation of the lamp. In this way, overloads in the melting due to large temperature differences can be prevented. The metal disc, with the edge of which the sealing foils are electrically connected and to which the electrode shaft is attached, gives the whole Construction a very great stability.
Der Innenraum der Kolbenhälse ist hohl und kann, da die an den Enden der Hälse angebrachten Sockel eine entsprechende Öffnung aufweisen, von Luft durchströmt werden. Dadurch wird im Lampenbetrieb eine zusätzliche Wärmeableitung vom Kolbenhals ermöglicht. Diese Wärmeableitung kann durch einen Stab aus wärmeabführendem Material, der isoliert in die hohlzylindrische Öfnnung des Kolbenhalses hineinragt, noch weiter verstärkt werden.The interior of the piston necks is hollow and, because the bases attached to the ends of the necks have a corresponding opening, air can flow through them. This enables additional heat dissipation from the bulb neck during lamp operation. This heat dissipation can be further reinforced by a rod made of heat-dissipating material, which protrudes in isolation into the hollow cylindrical opening of the piston neck.
Der Aufbau der Lampenhälse erlaubt Betriebsströme von bis zu 130 A, ohne daß dabei eine Schädigung der Einschmelzungen und damit die mittlere Lebensdauer der Lampe verkürzt wird. Mit diesen hohen Strömen und Leistungsaufnahmen von bis zu 24 000 W lassen sich so Hochdruckentladungslampen bauen, die mit einer Metallhalogenid-Füllung Lichtströme von über 2 Millionen lm abgeben.The structure of the lamp necks allows operating currents of up to 130 A without damaging the melts and thus reducing the average lamp life. With these high currents and power consumption of up to 24,000 W, high-pressure discharge lamps can be built that emit luminous fluxes of over 2 million lm with a metal halide fill.
Die Erfindung betrifft außerdem ein Verfahren zur Herstellung einer Hochdruckentladungslampe, wie sie in den Sachansprüchen beansprucht ist.The invention also relates to a method for producing a high-pressure discharge lamp, as claimed in the claims.
Bei dem Verfahren wird zuerst nach Herstellung des rotationssymmetrischen Entladungsraumes an den beiden in der Achse liegenden Enden je ein hohlzylindrisches Außenrohr aus Quarzglas angeschmolzen. In jedes angeschmolzene Außenrohr wird nun ein hohlzylindrisches Innenrohr aus Quarzglas geschoben, das an seinem dem Entladungsraum zugewandten Ende verschlossen ist und sich an seinem dem Entladungsraum abgewandten Ende olivenförmig erweitert. Dieses Innenrohr kann nun wiederum aus zwei ineinandergeschobenen Quarzglasrohren bestehen, wobei das innere der beiden Rohre die oben aufgeführten Merkmale aufweist und das äußere der beiden Rohre zum Entladungsraum hin offen ist sowie an seinem anderen Ende durch Verschmelzung mit dem innerren Rohr verschlossen ist.In the method, a hollow cylindrical outer tube made of quartz glass is first melted at the two ends lying in the axis after the rotationally symmetrical discharge space has been produced. A hollow cylindrical inner tube made of quartz glass is now pushed into each melted outer tube, which is closed at its end facing the discharge space and widens in an olive shape at its end facing away from the discharge space. This inner tube can now turn consist of two nested quartz glass tubes, the inner of the two tubes having the features listed above and the outer of the two tubes is open to the discharge space and is closed at its other end by fusion with the inner tube.
Der Aufbau des Innenrohres aus zwei Rohren bietet den Vorteil, daß beim späteren Einschmelzen der Dichtungsfolien eine optische Überprüfung der Einschmelzqualität ermöglicht wird. Eine gute Einschmelzung der Folien ist nur gegeben, wenn das Quarzglas der beiden Innenrohre sich soweit erweicht hat, daß optisch keine Außenkonturen der Rohre mehr sichtbar sind.The construction of the inner tube from two tubes offers the advantage that when the sealing films are subsequently melted, a visual check of the melting quality is made possible. The films are only melted well if the quartz glass of the two inner tubes has softened to such an extent that the outer contours of the tubes are no longer visible.
Vor dem Einschub des hohlzylindrischen Innenrohres wird auf das dem Entladungsraum zugewandte Ende des Rohres die Metallscheibe mit der daran befestigten Elektrode und den Dichtungsfolien gesteckt. Nach dem Einschub des Innenrohres wird der äußere Rand des olivenförmig erweiterten Endes mit der Innenwand des Außenrohres verschmolzen. Dann erfolgt eine mehrmalige Spülung mit Argon über den Entladungsraum und anschließend eine Evakuierung des Raumes zwischen dem Außen- und dem Innenrohr. Nach der Evakuierung werden die Dichtungsfolien gasdicht zwischen die beiden Rohre eingeschmolzen, wobei im Raum zwischen den beiden Rohren ein Unterdruck von 20 mbar Argon und im Inneren des hohlzylindrischen Innenrohres Luftdruck von 1 bar erzeugt wird. Zum Schluß des Verfahrens wird das Ende des Kolbenhalses mit dem olivenförmig erweiterten Ende des Innenrohres abgetrennt und die Dichtungsfolien mit dem am Ende des Halses befestigten Sockel elektrisch verbunden.Before the insertion of the hollow cylindrical inner tube, the metal disc with the electrode and the sealing foils attached to it is placed on the end of the tube facing the discharge space. After insertion of the inner tube, the outer edge of the olive-shaped end is fused to the inner wall of the outer tube. Then there is repeated flushing with argon over the discharge space and then an evacuation of the space between the outer and the inner tube. After the evacuation, the sealing foils are melted gas-tight between the two tubes, a vacuum of 20 mbar argon being generated in the space between the two tubes and air pressure of 1 bar being generated in the interior of the hollow cylindrical inner tube. At the end of the process, the end of the piston neck is separated with the olive-shaped end of the inner tube and the sealing foils are electrically connected to the base attached to the end of the neck.
Die Erfindung ist anhand der nachfolgenden Figuren näher veranschaulicht
- Figur 1
- zeigt eine Seitenansicht einer erfindungsgemäßen Hochdruckentladungslampe
Figur 2- zeigt einen Längsschnitt durch einen Kolbenhals der Hochdruckentladungslampe gemäß Figur 1 vor der Einschmelzung der Dichtungsfolien
Figur 3- zeigt einen Querschnitt durch einen Kolbenhals der Hochdruckentladungslampe gemäß
Figur 2 an der Stelle AB vor der Einschmelzung der Dichtungsfolien.
- Figure 1
- shows a side view of a high-pressure discharge lamp according to the invention
- Figure 2
- shows a longitudinal section through a bulb neck of the high-pressure discharge lamp according to FIG. 1 before the sealing films are melted down
- Figure 3
- shows a cross section through a bulb neck of the high-pressure discharge lamp according to FIG. 2 at position AB before the sealing films melt.
In Figur 1 ist eine erfindungsgemäße Metallhalogenid-Hochdruckentladungslampe mit einer Leistungsaufnahme von 24 000 W dargestellt. Der Lampenkolben 1 aus Quarzglas besteht aus einem größtenteils zylinderförmigen, rotationssymmetrischen Entladungsraum 2, an dessen beiden in der Achse liegenden Enden je ein zylindrischer Kolbenhals 3,4 angeschmolzen ist. In den Entladungsraum 2 ragen die beiden Stiftelektroden 5,6 aus Wolfram, die mit ihrem Schaftende in ein zentrales Loch in einer kreiszylindrischen Scheibe 7,8 aus Molybdän gesteckt und mit Platinlot fest eingelötet sind. Die elektrische Verbindung der Stiftelektroden 5,6 mit den Sockeln 9, 10 vom Typ s 30x70, die auf die freien Enden der Kolbenhälse 3,4 aufgesteckt sind, erfolgt durch je vier bandförmige Molybdän-Dichtungsfolien, von denen hier nur jeweils drei 11 bis 16 sichtbar sind. Die Dichtungsfolien 11 bis 16 sind mit ihrem einen Ende mit den jeweiligen Scheiben 7,8 verschweißt und mit ihren anderen Enden mit den hier nicht sichtbaren Stromzuführungen verbunden, die den elektrischen Kontakt mit den Sockeln 9,10 herstellen. Die Dichtungsfolien 11 bis 16 sind gasdicht zwischen zwei hohlzylindrische Quarzglasrohre, aus denen die Kolbenhälse 3,4 zusammengesetzt sind, eingeschmolzen. Die beiden Kolbenhälse 3,4 weisen eine zentrale Bohrung 17,18 auf, die bis kurz vor die Molybdän-Scheiben 7,8 reicht und über hier nicht sichtbare Öffnungen in den Sockeln 9,10 eine Luftkonvektion in den Kolbenhälsen 3,4 ermöglicht.1 shows a metal halide high-pressure discharge lamp according to the invention with a power consumption of 24,000 W. The lamp bulb 1 made of quartz glass consists of a largely cylindrical, rotationally
In Figur 2 ist der Aufbau eines Kolbenhalses vor der Einschmelzung der Dichtungsfolien dargestellt. Der Kolbenhals besteht aus einem hohlzylindrischen Außenrohr 19, das mit dem rotationssymmetrischen Entladungsraum 2 verschmolzen ist. In das Außenrohr 19 ist ein hohlzylindrisches Innenrohr aus Quarzglas geschoben, das wiederum aus zwei ineinandergeschobenen Rohren 20, 21 besteht. Das innere 20 der beiden Rohre 20,21 ist an seinem dem Entladungsraum 2 zugewandten Ende mit einer Abdichtung 22 versehen und weist an seinem dem Entladungsraum 2 abgewandten Ende eine olivenförmige Erweiterung 23 auf. Die Außenwand der olivenförmigen Erweiterung 23 berührt dabei die Innenwand des Außenrohrs 19. Das äußere 21 der beiden Innenrohre ist zum Entladungsraum 2 hin offen und an seinem vom Entladungsraum 2 abgewandten Ende nahe der olivenförmigen Erweiterung 23 mit dem inneren Rohr 20 verschmolzen. Auf das aus den zwei ineinandergeschobenen Rohren 20,21 bestehende Innenrohr ist auf seinem entladungsseitigen Ende die Scheibe 8 aus Molybdän mit der daran befestigten Wolframelektrode 6 und den vier verschweißten Molybdän-Dichtungsfolien gesteckt, von denen hier nur zwei 14,16 sichtbar sind.In Figure 2, the structure of a piston neck is shown before the sealing films melt. The piston neck consists of a hollow cylindrical
Die Dichtungsfolien 14,16 verlaufen parallel zur Achse des Kolbenhalses zwischen dem Außenrohr 19 und dem äußeren Rohr 20 des Innenrohres. Zusätzlich ist über den Schaft der Stiftelektrode 6 ein hohlzylindrisches Rohrstück 24 aus Quarzglas gesteckt, das nach der Einschmelzung für eine Abdichtung zwischen dem Entladungsraum 2 und der Molybdän-Scheibe 8 sorgt.The sealing foils 14, 16 run parallel to the axis of the piston neck between the
In Figur 3 ist der Kolbenhals vor der Einschmelzung im Querschnitt an der Stelle AB in Blickrichtung auf den Entladungsraum dargestellt. Die Figur zeigt das hohlzylindrische Außenrohr 19 und die beiden hohlzylindrischen Innenrohre 20,21. Dazwischen sind ein Teil der Molybdän-Scheibe 8 und die vier gleichmäßig über den Umfang des Innenrohres 21 verteilten Molybdän-Dichtungsfolien 14, 15, 16, 25 zu sehen.In FIG. 3, the piston neck is shown in cross-section at point AB before the melting, looking in the direction of the discharge space. The figure shows the hollow cylindrical
In der nachfolgenden Tabelle sind die technischen Daten der Metallhalogenid-Hochdruckentladungslampe, wie sie in Figur 1 dargestellt ist, zusammengestellt:
Claims (15)
- High-pressure discharge lamp for lamp currents greater than 20 A having a quartz-glass lamp bulb (1) on whose rotationally symmetrical discharge space (2) a cylindrical bulb neck (3, 4) comprising at least two mutually inserted, hollow-cylindrical quartz-glass tubes (19, 20, 21) fused together is in each case mounted at the two axially situated ends, at least two strip-type sealing foils (11 to 16; 25) being gastightly fusion-sealed in between the quartz-glass tubes (19, 21) parallel to the longitudinal axis of the bulb neck (3, 4) at equal spacings over the circumference of the inner hollow-cylindrical quartz-glass tube (21), one end of the sealing foils (11 to 16; 25) being electrically connected to the shank of the respective electrode (6, 7) and the other end of the sealing foils being electrically connected to the current supply lead and that end of the inner hollow-cylindrical quartz-glass tube (20) that is adjacent to the discharge space (2) being sealed and the lamp bulb (1) having a filling of at least one noble gas and, optionally, further additives such as mercury and/or metal halides, characterized in that the ends of the sealing foils (11 to 16, 25) on the discharge side are each electrically connected to the rim of a metal disc (7, 8) which is fusion-sealed into the bulb neck (3, 4) near the discharge space (2) and to which the free end of the respective electrode shank is attached.
- High-pressure discharge lamp according to Claim 1, characterized in that the metal disc (7, 8) has a circular-cylindrical shape.
- High-pressure discharge lamp according to Claim 1, characterized in that the free end of the electrode shank is connected to the metal disc by a solder joint.
- High-pressure discharge lamp according to Claim 1, characterized in that the free end of the electrode shank is inserted through a central hole in the metal disc (7, 8) and is soldered to the latter.
- High-pressure discharge lamp according to Claim 1, characterized in that a rod composed of heat-dissipating material is attached in an insulating manner near the free end of the bulb neck and projects into the hollow-cylindrical opening of the bulb neck.
- High-pressure discharge lamp according to Claim 1, characterized in that the metal disc (7, 8) comprises molybdenum.
- Method of producing a high-pressure discharge lamp having the features cited in Claims 1 to 6, characterized in that a hollow-cylindrical quartz-glass outer tube (19) is fused in each case onto the two axially situated ends only after the rotationally symmetrical discharge space (2) has been produced.
- Method according to Claim 7, characterized in that a hollow-cylindrical quartz-glass inner tube which is sealed at its end adjacent to the discharge space and has an olive-shaped widened section at its end remote from the discharge space is inserted into each fused-on outer tube.
- Method according to Claim 7, characterized in that a hollow-cylindrical quartz-glass inner tube which comprises two mutually inserted quartz-glass tubes (20, 21) is inserted into each fused-on outer tube (19), the inner (20) of the two tubes (20, 21) being sealed at its end adjacent to the discharge space (2) and having an olive-shaped widened section at its end remote from the discharge space (2) and the outer (21) of the two tubes (20, 21) being fused to the inner tube (20) near the olive-shaped widened section (23).
- Method according to Claim 8 or 9, characterized in that, before the hollow-cylindrical inner tube is inserted, a metal disc (8) with the electrode (6) attached thereto and the sealing foils (14, 15, 16, 25) is mounted on that end of the tube that is adjacent to the discharge space (2).
- Method according to Claim 8 or 9, characterized in that after the hollow-cylindrical inner tube has been inserted, the outer rim of the olive-shaped widened end (23) is fused to the inner wall of the hollow-cylindrical outer tube (19).
- Method according to Claim 11, characterized in that, after the end (23) of the inner tube (20) has been fused to the outer tube (19), the space between the two tubes (19, 20, 21) is repeatedly flushed with argon via the discharge space and then evacuated.
- Method according to Claim 12, characterized in that, after the space between the two tubes (19, 20, 21) has been evacuated, the sealing foils (14, 15, 16, 25) are gastightly fusion-sealed in between the two tubes (19, 20, 21).
- Method according to Claim 13, characterized in that, during the operation of sealing-in the sealing foils (14, 15, 16, 25), an underpressure of 20 mbar of argon is generated in the space between the two tubes (19, 20, 21) and an air pressure of 1 bar is generated in the inner space of the hollow-cylindrical inner tube (21).
- Method according to Claim 14, characterized in that, after the sealing foils (14, 15, 16, 25) have been fusion-sealed in, the free end of the bulb neck (4) with that end (23) of the inner tube (20) which is widened in an olive-shaped fashion is removed.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4031116A DE4031116A1 (en) | 1990-10-02 | 1990-10-02 | High pressure discharge lamp and method for producing the lamp |
| DE4031116 | 1990-10-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0479088A1 EP0479088A1 (en) | 1992-04-08 |
| EP0479088B1 true EP0479088B1 (en) | 1995-12-20 |
Family
ID=6415413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91116146A Expired - Lifetime EP0479088B1 (en) | 1990-10-02 | 1991-09-23 | High pressure discharge lamp and method for producing the same |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5264759A (en) |
| EP (1) | EP0479088B1 (en) |
| JP (1) | JPH04262361A (en) |
| DE (2) | DE4031116A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19603301C2 (en) * | 1996-01-30 | 2001-02-22 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electric lamp with molybdenum foil bushings for a lamp vessel made of quartz glass |
| DE19603300C2 (en) * | 1996-01-30 | 2001-02-22 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electric lamp with molybdenum foil bushings for a lamp vessel made of quartz glass |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5486737A (en) * | 1994-04-12 | 1996-01-23 | Osram Sylvania Inc. | Heavily loaded double-ended arc lamp |
| US5793160A (en) * | 1996-11-15 | 1998-08-11 | Superior Quartz Products, Inc. | Platform-based multiple foil high current electrode attachment for medium pressure quartz lamps |
| DE19825004A1 (en) | 1998-04-24 | 1999-10-28 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | High pressure discharge lamp |
| DE19961551A1 (en) * | 1999-12-20 | 2001-06-21 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Melting film and associated lamp with this film |
| US20060170361A1 (en) * | 2005-01-31 | 2006-08-03 | Osram Sylvania Inc. | Single-ended Arc Discharge Vessel with a Divider Wall |
| DE102006026940A1 (en) * | 2006-06-09 | 2007-12-13 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH | High pressure discharge lamp |
| US7728495B2 (en) * | 2007-08-01 | 2010-06-01 | Osram Sylvania Inc. | HID lamp with frit seal thermal control |
| CN108251887A (en) * | 2016-12-29 | 2018-07-06 | 上海亚尔光源有限公司 | A kind of production method of super-pressure point light source sealing-in molybdenum sheet |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB663309A (en) * | 1948-05-01 | 1951-12-19 | British Thomson Houston Co Ltd | Improvements relating to the production of quartz-to-metal seals |
| US2786882A (en) * | 1951-01-25 | 1957-03-26 | Krefft Hermann Eduard | Lead-in seal for electrical discharge devices |
| US3351803A (en) * | 1964-11-12 | 1967-11-07 | Westinghouse Electric Corp | Seal and lead-in conductor assembly for gaseous discharge lamps |
| US3675068A (en) * | 1970-09-10 | 1972-07-04 | Duro Test Corp | Seal structures for electric discharge lamps |
| GB2072937B (en) * | 1980-03-27 | 1984-05-02 | Ilc Technology Inc | High intensity discharge lamps |
| GB8303074D0 (en) * | 1983-02-04 | 1983-03-09 | Gen Electric Co Plc | Electric discharge lamps |
| DE3427280C2 (en) * | 1984-07-24 | 1986-06-12 | Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, 8000 München | Metal halide high pressure discharge lamp |
| US4959587A (en) * | 1989-01-13 | 1990-09-25 | Venture Lighting International, Inc. | Arc tube assembly |
-
1990
- 1990-10-02 DE DE4031116A patent/DE4031116A1/en not_active Withdrawn
-
1991
- 1991-09-23 EP EP91116146A patent/EP0479088B1/en not_active Expired - Lifetime
- 1991-09-23 DE DE59107117T patent/DE59107117D1/en not_active Expired - Fee Related
- 1991-09-26 US US07/766,005 patent/US5264759A/en not_active Expired - Fee Related
- 1991-10-01 JP JP3282275A patent/JPH04262361A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19603301C2 (en) * | 1996-01-30 | 2001-02-22 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electric lamp with molybdenum foil bushings for a lamp vessel made of quartz glass |
| DE19603300C2 (en) * | 1996-01-30 | 2001-02-22 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Electric lamp with molybdenum foil bushings for a lamp vessel made of quartz glass |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0479088A1 (en) | 1992-04-08 |
| DE4031116A1 (en) | 1992-04-09 |
| US5264759A (en) | 1993-11-23 |
| DE59107117D1 (en) | 1996-02-01 |
| JPH04262361A (en) | 1992-09-17 |
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