WO2014170734A1 - 放電ランプ - Google Patents

放電ランプ Download PDF

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Publication number
WO2014170734A1
WO2014170734A1 PCT/IB2014/000524 IB2014000524W WO2014170734A1 WO 2014170734 A1 WO2014170734 A1 WO 2014170734A1 IB 2014000524 W IB2014000524 W IB 2014000524W WO 2014170734 A1 WO2014170734 A1 WO 2014170734A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
metal foil
discharge lamp
strip
sealing tube
Prior art date
Application number
PCT/IB2014/000524
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
稔 岡井
裕介 細木
武弘 林
Original Assignee
株式会社オーク製作所
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 株式会社オーク製作所 filed Critical 株式会社オーク製作所
Priority to CN201480021153.2A priority Critical patent/CN105122423B/zh
Priority to KR1020157027299A priority patent/KR102190649B1/ko
Priority to JP2015512191A priority patent/JP6371275B2/ja
Publication of WO2014170734A1 publication Critical patent/WO2014170734A1/ja

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/24—Manufacture or joining of vessels, leading-in conductors or bases
    • H01J9/32—Sealing leading-in conductors
    • H01J9/323—Sealing leading-in conductors into a discharge lamp or a gas-filled discharge device
    • 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
    • H01J61/84—Lamps with discharge constricted by high pressure
    • H01J61/86—Lamps with discharge constricted by high pressure with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection

Definitions

  • the present invention relates to a short arc type discharge lamp, and more particularly to a discharge lamp sealing structure.
  • a glass sealing tube is integrally formed at both ends of an arc tube sealed with an electrode, and an electrode support rod for supporting the electrode is held by a cylindrical glass tube in the sealing tube. Is done.
  • the diameter of the sealing tube is reduced by heat, and the sealing tube is welded to the glass tube.
  • metal foil is sealed and the inside of an arc_tube
  • a metal ring is fixed to the electrode support rod, and a plurality of metal foils are welded to the metal ring.
  • electric power is supplied through metal foil, a metal ring, and an electrode support rod (for example, refer patent document 1). If a crack occurs near the metal ring due to the difference in thermal expansion coefficient between the metal ring and the sealing tube while the lamp is lit, the metal ring in a high temperature state is oxidized by touching the outside air and the metal foil is blown out. Alternatively, the arc tube may be ruptured by the progress of the crack.
  • the amount of enclosed mercury may be extremely small in order to realize fine exposure. As a result, the peak half-value width is reduced, and a spectral distribution characteristic that stands out in the vicinity of the peak wavelength is obtained.
  • Such a discharge lamp with a small amount of enclosed mercury emits light at a low voltage and is in a stable lighting state.
  • the current that flows when the lamp is lit in a high-power (3 kW or more) discharge lamp has a high current value (for example, 130 A or more). More heat is generated by increasing the value of the current flowing through the metal foil and metal ring, and a large thermal stress acts on the seal tube, especially at the contact surface between the metal ring and metal foil and the seal tube. To do.
  • the discharge lamp of the present invention is provided in a sealed tube formed integrally with the arc tube, and an electrode support bar that supports the electrode in the arc tube, an electrical connection rod that is electrically connected to an external power source, A glass member into which the electrode support rod and the electrical connecting rod are inserted and welded to the sealing tube, a plurality of strip metal foils extending along an outer surface of the glass member, the strip metal foil, and the electrode support rod And a pair of annular members for electrically connecting the electrical connecting rods.
  • the annular member only needs to be a conductive member, and can be composed of, for example, a metal ring, and a plurality of metal foils are connected to the outer surface of the ring.
  • the glass member can be configured as a cylindrical glass having shaft holes formed at both ends.
  • the thickness of the strip metal foil is such that the rated power is 3 kW or more, the current value during stable lighting is 130 A or more, the mercury content in the arc tube is 7 mg / cc (cm 3 ) or less, and the following formula is satisfied. Is determined.
  • the thermal stress applied from the outer surface of the annular member to the inner surface of the sealing tube is ⁇ (Pa)
  • the outer surface temperature of the sealing tube is T (° C.)
  • the current value during stable lighting is I (A )
  • the number of the strip-shaped metal foil is n
  • the width of the strip-shaped metal foil is w (mm)
  • the thickness of the strip-shaped metal foil is d (mm).
  • the heat generated in the metal foil during lamp lighting is a conductive ring such as the inner surface of the sealed tube and the metal ring. It is found that the thermal stress applied to the contact surface with the outer surface of the member is affected, and the thickness of the metal foil is determined to be a specific thickness so that cracks do not occur even when a large current flows through the metal foil.
  • a discharge lamp having excellent durability can be realized. It is possible to effectively suppress the occurrence of cracks in a short type discharge lamp having a relatively small outer diameter of the sealing tube, and the sealing tube can be applied to a discharge lamp that satisfies the following expression. I / L ⁇ 5 If the outer surface temperature of the sealing tube is too low, thermal distortion occurs due to a large temperature difference between the sealing tube and the arc tube. On the other hand, if the outer surface temperature is too high, the cap portion and the sealing tube Thermal distortion occurs due to the large temperature difference. Therefore, it is preferable that the outer surface temperature of the sealing tube during stable lamp lighting satisfies the following formula.
  • a discharge lamp is provided in a sealing tube formed integrally with the arc tube, and is electrically connected to an electrode support bar for supporting the electrode in the arc tube and an external power source.
  • an annular member that electrically connects the electrical connecting rod, and the thickness of the strip-shaped metal foil is determined so as to satisfy the following expression.
  • the thermal stress applied from the outer surface of the annular member to the inner surface of the sealing tube is ⁇ (Pa).
  • FIG. 1 is a schematic cross-sectional view of a short arc type discharge lamp according to this embodiment.
  • the short arc type discharge lamp 10 is a lamp in which an anode 14 and a cathode 16 are opposed to each other in a spherical light emitting tube 12 made of quartz glass, and quartz glass sealing tubes 20 and 60 are provided at both ends of the light emitting tube 12. It is integrally formed so as to face each other. Both ends of the sealing tubes 20 and 60 are closed with caps 80A and 80B.
  • the short arc type discharge lamp 10 is a high output discharge lamp having a rated power of 3 kW or more, while the outer diameter of the sealed tube is relatively small, and the illumination light has a spectral distribution characteristic that stands out in the vicinity of the peak wavelength.
  • the amount of mercury enclosed in the issuance tube is set to 7 mg / cc or less.
  • FIG. 2 is a schematic cross-sectional view of the cathode side sealing tube.
  • the anode side sealing tube is configured similarly.
  • an electrode support bar 17B that supports the cathode 16 is provided inside the sealing tube 60 in which the mount component 18B is enclosed, and is disposed along the axial direction.
  • the electrode support rod 17 ⁇ / b> B is inserted through a shaft hole formed in a cylindrical thick glass tube (hereinafter referred to as an electrode side glass tube) 22 and is held by the electrode side glass tube 22.
  • the electrode support rod 17B does not extend to the end portion of the sealing tube 60, and a metal lead rod (electrical connection rod) 19B is coaxially disposed opposite to the electrode support rod 17B at a predetermined interval.
  • the electrode support bar 17B and the lead bar 19B are inserted into insertion holes provided at both ends of a thick cylindrical glass member (hereinafter referred to as an outer glass member) 26.
  • the outer glass member 26 is inserted into the electrode support bar 17B and the lead bar 19B. Hold.
  • the lead bar 19B is connected to an external lead wire (not shown) connected to a power supply unit (not shown).
  • Metal rings (annular members) 23 and 25 are arranged in close contact with both ends of the outer glass member 26, and the electrode support bar 17B and the lead bar 19B are inserted into the shaft holes of the metal rings 23 and 25 and welded. .
  • a metal ring (hereinafter referred to as an inner metal ring) 23 close to the arc tube 12 is in contact with the electrode-side glass tube 22, and the other metal ring (hereinafter referred to as an outer metal ring) 25 is inserted through the lead bar 19B. It contacts with the fixed thickness glass tube 28 to be held.
  • a plurality of strip-shaped metal foils 27 extend in the axial direction along the outer surface of the outer glass member 26, and are arranged at equal intervals along the circumferential direction. Yes. Further, both ends of each of the plurality of strip-shaped metal foils 27 are welded to the circumferential surfaces of the inner metal ring 23 and the outer metal ring 25.
  • the outer metal ring 25 electrically connects the lead bar 19B and the band-shaped metal foil 27, and the inner metal ring 23 electrically connects the band-shaped metal foil 27 and the electrode support bar 22, whereby the power supply unit Power is supplied to the cathode 16 from the lead bar 19B that is electrically connected to the cathode 16.
  • the sealing tube 60 is reduced in diameter by being heated by a gas burner or the like during the sealing process, and is welded to the electrode side glass tube 22, the outer glass member 26, and the fixed glass tube 28.
  • the inside of the sealing tube 60 is sealed, and the mounting component 18B including the electrode side glass tube 22, the inner metal ring 23, the outer metal ring 25, the outer glass member 26, and the fixed glass tube 28 moves in the axial direction. It is fixed so that there is no.
  • FIG. 3 is a graph showing the relationship between the outer surface temperature of the sealed tube and the thermal stress.
  • FIG. 4 is a graph showing the relationship between the current density of the current flowing through the metal foil and the outer surface temperature of the sealed tube.
  • the discharge lamp 10 is a short arc type discharge lamp, a low voltage, large current type discharge lamp, and has a relatively small outer diameter of the sealed tube. Therefore, the heat generated in the entire metal foil 27 during lamp lighting affects the thermal stress applied from the vicinity of the outer peripheral surface of the inner and outer metal rings 25 toward the sealing tube 60. The influence of this heat is very large compared to a discharge lamp having a large outer diameter of the sealed tube.
  • the thickness of the metal foil 27 related to the current density is determined to be equal to or greater than a predetermined thickness. As shown in FIGS.
  • the thermal stress ⁇ (Pa) applied from the outer peripheral surface of the outer metal ring 25 to the inner surface of the sealing tube 60 the outer surface temperature of the sealing tube 60 is T (° C.)
  • the current value during stable lighting is I (A)
  • the number of metal foils 27 is n
  • the width of the metal foil is w (mm)
  • the thickness of the metal foil is d (mm)
  • the thickness d (mm) of the metal foil, the width w (mm) of the metal foil, and the number n of the metal foils 27 are determined.
  • Equation (1) indicates that the outer surface temperature T of the sealed tube and the thermal stress ⁇ are in a proportional relationship (see FIG. 3). However, the surface temperature at the sealing tube point PT shown in FIG. Moreover, (2) Formula has shown that the sealing tube outer surface temperature T and current density (I / nwd) have a proportional relationship (refer FIG. 4). Equations (1) and (2) are equations that are clarified by actually measuring the outer surface temperature of the sealed tube with a thermocouple and measuring the thermal stress by simulation. Equation (3) is an empirical equation derived from experiments and the like.
  • the number n of metal foils 27, the width w, and the thickness so as to satisfy the above equation (3). d can be determined.
  • the same relationship applies to the inner metal ring 23.
  • the number and width of the metal foils 27 are generally the same as those of the conventional short arc type discharge lamp, and the degree of freedom is small due to restrictions and requirements in the manufacturing process. Therefore, in practice, the occurrence of cracks is prevented by adjusting the thickness of the metal foil 27.
  • the metal foil is thicker than the conventional one. However, if the thickness is too large, peeling of the foil occurs, so the thickness is set to 0.1 mm or less.
  • the rated power, the sealed tube diameter, and the like are determined so that the sealed tube outer surface temperature satisfies the following formula. 150 ⁇ T ⁇ 800 (4)
  • the outer surface temperature T of the sealing tube 150 ° or more thermal distortion due to the temperature difference with the arc tube is suppressed, and by making the outer surface temperature T of the sealing tube 800 ° or less, it depends on the temperature difference with the base part. Reduce thermal distortion.
  • a sealing structure that satisfies the above formula for a short arc type discharge lamp having a relatively small outer diameter L of the sealed tube, and here, the outer diameter L of the sealed tube that satisfies the following formula is adopted.
  • a discharge lamp is applied.
  • the outer shape L is set to 40 mm or less. I / L ⁇ 5 (5)
  • the number and width of the metal foils become very small. It must be extremely thick, increasing the risk of foil peeling.
  • the thickness of the sealing foil in the discharge lamp satisfying the expression (5), it is required to determine the thickness of the sealing foil so as to satisfy the expressions (1), (2), and (3).
  • the rated output is large (3 kW or more), and a large current (130 mmA or more) flows by lighting with a low voltage, the above (1 ) To (3) so that the thickness of the metal foil is determined.
  • the above (1 ) To (3) so that the thickness of the metal foil is determined.
  • a metal ring and a glass member it is also possible to make it another structure and shape.
  • the discharge lamp which is an Example is demonstrated.
  • the thickness of the metal foil was changed to examine the presence or absence of cracks.
  • the outer diameter of the sealing tube is 27 mm
  • the thickness of the sealing tube is 3.5 mm
  • the outer diameter of the cylindrical outer glass member is 20 mm
  • the number of metal foils is 5, and the width is 10 mm.
  • the rated power is 4.5 kW and the current value is 155 mA.
  • the thickness of the metal foil is set to 0.06 mm and 0.05 mm, the lamp is continuously lit for 1000 hours, and the temperature is measured by a thermocouple, while the thermal stress is calculated by a computer simulation and whether or not cracks are generated. I investigated.
  • Electrode support rod 19B Lead rod (electrical connection rod) 23 Inner metal ring (annular member) 25 Outer metal ring (annular member) 26 Outer glass member (glass member) 27 Metal foil 60 Sealed tube

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Vessels And Coating Films For Discharge Lamps (AREA)
  • Discharge Lamps And Accessories Thereof (AREA)
PCT/IB2014/000524 2013-04-15 2014-04-11 放電ランプ WO2014170734A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201480021153.2A CN105122423B (zh) 2013-04-15 2014-04-11 短弧型放电灯
KR1020157027299A KR102190649B1 (ko) 2013-04-15 2014-04-11 방전 램프
JP2015512191A JP6371275B2 (ja) 2013-04-15 2014-04-11 放電ランプ

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2013084929 2013-04-15
JP2013-084929 2013-04-15

Publications (1)

Publication Number Publication Date
WO2014170734A1 true WO2014170734A1 (ja) 2014-10-23

Family

ID=51730875

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2014/000524 WO2014170734A1 (ja) 2013-04-15 2014-04-11 放電ランプ

Country Status (5)

Country Link
JP (1) JP6371275B2 (zh)
KR (1) KR102190649B1 (zh)
CN (1) CN105122423B (zh)
TW (1) TWI608518B (zh)
WO (1) WO2014170734A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016207482A (ja) * 2015-04-23 2016-12-08 岩崎電気株式会社 ショートアーク型放電ランプ
JP2020107419A (ja) * 2018-12-26 2020-07-09 株式会社オーク製作所 放電ランプ及び照明装置
TWI798425B (zh) * 2018-05-10 2023-04-11 日商鷗爾熙製作所股份有限公司 放電燈及放電燈的製造方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7175228B2 (ja) * 2019-03-27 2022-11-18 株式会社オーク製作所 放電ランプおよびその製造方法
CN115148576A (zh) * 2022-08-05 2022-10-04 株式会社优美科思 箔密封型短弧汞灯

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003257364A (ja) * 2002-03-05 2003-09-12 Ushio Inc ショートアーク型水銀ランプ
JP2009238671A (ja) * 2008-03-28 2009-10-15 Orc Mfg Co Ltd ショートアーク型放電ランプ
JP2012174585A (ja) * 2011-02-23 2012-09-10 Koto Electric Co Ltd メタルハライドランプ

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4182900B2 (ja) * 2004-02-27 2008-11-19 ウシオ電機株式会社 高圧放電ランプ
JP5047483B2 (ja) * 2005-09-27 2012-10-10 株式会社オーク製作所 ショートアーク放電灯の封止構造
JP4963821B2 (ja) * 2005-10-18 2012-06-27 株式会社オーク製作所 放電灯の封止構造
JP5072665B2 (ja) * 2008-03-13 2012-11-14 株式会社オーク製作所 ショートアーク型放電ランプの封止部構造
JP5765625B2 (ja) * 2011-08-25 2015-08-19 ウシオ電機株式会社 ロングアーク型放電ランプ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003257364A (ja) * 2002-03-05 2003-09-12 Ushio Inc ショートアーク型水銀ランプ
JP2009238671A (ja) * 2008-03-28 2009-10-15 Orc Mfg Co Ltd ショートアーク型放電ランプ
JP2012174585A (ja) * 2011-02-23 2012-09-10 Koto Electric Co Ltd メタルハライドランプ

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016207482A (ja) * 2015-04-23 2016-12-08 岩崎電気株式会社 ショートアーク型放電ランプ
TWI798425B (zh) * 2018-05-10 2023-04-11 日商鷗爾熙製作所股份有限公司 放電燈及放電燈的製造方法
JP2020107419A (ja) * 2018-12-26 2020-07-09 株式会社オーク製作所 放電ランプ及び照明装置
JP7210269B2 (ja) 2018-12-26 2023-01-23 株式会社オーク製作所 放電ランプ及び照明装置

Also Published As

Publication number Publication date
CN105122423B (zh) 2017-03-29
KR20150140665A (ko) 2015-12-16
JP6371275B2 (ja) 2018-08-08
JPWO2014170734A1 (ja) 2017-02-16
CN105122423A (zh) 2015-12-02
TWI608518B (zh) 2017-12-11
KR102190649B1 (ko) 2020-12-14
TW201503219A (zh) 2015-01-16

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