CN102376523A - Discharge lamp - Google Patents
Discharge lamp Download PDFInfo
- Publication number
- CN102376523A CN102376523A CN2011102092998A CN201110209299A CN102376523A CN 102376523 A CN102376523 A CN 102376523A CN 2011102092998 A CN2011102092998 A CN 2011102092998A CN 201110209299 A CN201110209299 A CN 201110209299A CN 102376523 A CN102376523 A CN 102376523A
- Authority
- CN
- China
- Prior art keywords
- anode
- melanism
- discharge lamp
- lamp according
- suppresses
- 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
Links
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
- H01J61/04—Electrodes; Screens; Shields
- H01J61/06—Main electrodes
- H01J61/073—Main electrodes for high-pressure discharge lamps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/12—Selection of substances for gas fillings; Specified operating pressure or temperature
- H01J61/16—Selection of substances for gas fillings; Specified operating pressure or temperature having helium, argon, neon, krypton, or xenon as the principle constituent
Landscapes
- Discharge Lamp (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
The present invention provides a discharge lamp which can prevent blackening of a discharge container under the situation without complicated operation processes. Through shoot blasting, aluminum oxide is sprayed on the periphery (side surface)(30C) of an anode (30), then the aluminum oxide (26)is adhered to the periphery (30C)under the dispersive state. The anode (30) is then treated through vacuum heating under the melting point of the aluminum oxide (26), and foreign gas is eliminated. When the lamp is lighted and started, as the temperature of the anode (30) rises, the aluminum oxide (26) is fused and evaporated, and the evaporated aluminum oxide is adhered to the inner surface of a luminotron.
Description
Technical field
The present invention relates in luminous tube, dispose the discharge lamp of electrode, the surface structure of the electrode that particularly in the high-intensity discharge lamp (HID lamp) of short arc discharge lamp etc., uses.
Background technology
In short arc discharge lamp, in the discharge tube of quartz glass system, dispose negative electrode and anode relatively, through producing arc discharge, carry out Discharge illuminating from negative electrode anode ejected electron.As electrode material,, generally use dystectic tungsten (W) for the electrode fusion in preventing to light.
And, as for the negative electrode that in high-intensity discharge lamp, uses, emit ability and carry out high brightness luminescent in order to improve electronics, using the lower electronic emission property material (electronics is emitted material) of working temperature that mixing is thorium oxide (ThO
2) tungsten cathode (being commonly referred to as thoriated-tungsten cathode) (for example with reference to patent documentation 1,2).
Carry out arc discharge during because ejected electron, the rising of the temperature of cathode portion and anode leading section.When temperature rises near the fusing point of electrode material, cathode portion and the fusion of anode leading section, evaporation, consumption of electrode.The metal of evaporation is attached to the discharge tube inwall, thus, and luminous tube inwall melanism.That is, metal adhere to the reduction that causes transmissivity, the light output of lamp reduces.And then when luminous tube inwall melanism, the part part of melanism becomes high temperature, thus, in luminous tube, accumulates thermal deformation, causes lamp to break sometimes.
As for thoriated-tungsten cathode, thorium forms monoatomic layer owing to reduction at electrode surface, and still, isolated oxygen combines with the tungsten of anode leading section from thorium oxide, and this can make the fusing point of anode leading section reduce, and makes consumption of electrode.In order to prevent kind electrode consumption, for example after thoriated-tungsten cathode is formed, near cathode surface, form layer (taking off the thorium layer) (with reference to the patent documentation 3) that does not comprise thorium oxide through vacuum heating treatment.
Perhaps, applying transparent polycrystal at the luminous tube inner surface is aluminium oxide (Al
2O
3), thus, can prevent the melanism (with reference to patent documentation 4,5) of luminous tube.Compare with the quartz glass of discharge tube material, the chemical and the physical property of aluminium oxide are more stable, not with light in reactions such as charged particle, compound such as the metal, ion of emitting from electrode, prevent the melanism of luminous tube.
[patent documentation 1] japanese kokai publication sho 57-9044 communique
[patent documentation 2] TOHKEMY 2003-22780 communique
[patent documentation 3] TOHKEMY 2003-257365 communique
[patent documentation 4] japanese kokai publication sho 61-294752 communique
[patent documentation 5] TOHKEMY 2002-157974 communique
Near cathode surface, forming the operation of taking off this particulate metal layer of thorium layer is miscellaneous flow chart, and the production efficiency of lamp is reduced.And in arc discharge, if do not form the thorium layer of appropriateness at cathode surface, melanism or brightness that then can the guiding discharge pipe reduce.For example, when because ejected electron and at cathode surface when the thorium of crystallization is too much again, because electrode temperature rises, thorium evaporation and be attached to discharge tube.On the contrary, when thorium is very few, can't improves the electronics of negative electrode and emit ability.
On the other hand, the operation that applies aluminium oxide etc. at the discharge tube inner surface also is miscellaneous flow chart, and production efficiency is worsened.And even apply, the discharge tube self that heating is shaped also has heat, so, can't satisfy sufficient coating performance owing to the influence of heat, transmissivity reduces.
Summary of the invention
Discharge lamp of the present invention is the discharge lamp that does not need miscellaneous flow chart and can prevent the melanism of discharge vessel, anode and negative electrode that this discharge lamp has discharge vessel and in discharge vessel, disposes relatively.For example, the discharge lamp of the light of output such as short arc discharge lamp high brightness, its electrode is under the condition of high temperature.But, also can be applied to the electrode of the discharge lamp beyond the short arc discharge lamp.Discharge vessel is made up of quartz glass of transmitted light etc. and gets final product, and electrode is made up of the metal material of tungsten etc. and gets final product.And, also can make anode contain potassium.
In the present invention, be formed with at anode surface at least small concavo-convex.For example, can form small concavo-convex through implementing surface treatment.The small concavo-convex lusterless coarse state (pears skin state) that for example is meant here is meant concavo-convex about tens μ m.As surface treatment, can carry out Surface Finishing through the inject process of shot-peening, wet shotcrete technology, sandblast etc.Perhaps, can the method beyond the surface treatment through machine finishing, laser processing, edm etc. form micro concavo-convex (about hundreds of μ m concavo-convex), that is, make rough surface.Melanism suppresses the body entering, and these are small concavo-convex, thus, are attached to anode surface easily.
And, in the present invention, prevent that the material (below be called melanism suppress body) of discharge vessel melanism from disperseing and being attached to be formed with small concavo-convex anode surface.Here, " melanism inhibition body " is meant not composition material (for example quartz glass) reaction (not producing melanism) with discharge vessel, even be attached to particulate matter, the constituent that the discharge vessel inner surface can not reduce the optical transmission rate as much as possible yet.And " dispersion " is meant that sporadicly (under homodisperse state) scatters from the teeth outwards, and for example suppressing body with melanism, to cover the state of anode surface fully different.Melanism suppresses style and constitutes like the aggregate by this small piece of particle, powder, and its size is unqualified.The small concavo-convex degree (size) of anode surface also can be confirmed according to the size that melanism suppresses body.
When temperature of anode was risen, the melanism that is attached to anode surface suppressed body fusion, evaporation.Because anode surface is coarse, melanism suppresses body and evaporates easily.Because the thermal convection that in discharge vessel, produces, the melanism of evaporation suppress body and contact with the discharge vessel inner surface, become solid and adhere to.Melanism suppresses body and is scattered in anode surface, so, evaporate at random from anode surface, be attached to discharge vessel through thermal convection.Like this, in the present invention, through the action of lighting after the lamp manufacturing, along with the process of the time of lighting, as the processing of the protection applying is implemented on the discharge vessel inner surface.
When electrode was heated, the metal melting as electrode material, the evaporation of tungsten, thorium etc. in the time of in it is attached to discharge vessel, caused the melanism of discharge vessel inner surface.Especially, under the situation of short arc discharge lamp, negative electrode, anode leading section rise near the high temperature 2000 ℃, and electrode metal evaporates easily.
But in the present invention, when after the lamp manufacturing, lighting starting, the melanism that is attached to anode surface in advance suppresses evacuator body and is attached to discharge vessel.The melanism that is attached to the discharge vessel inner surface suppresses body does not react with discharge vessel, can not reduce the optical transmission rate, so, can not make the discharge vessel melanism.
On the other hand, when melanism suppresses body and is attached to the discharge vessel inner surface, the metal of the electrode material that from electrode, evaporates of tungsten etc. or mercury etc. for luminous and enclose in the discharge tube metal not with glass reaction.That is, obstruction causes the metal of melanism to be attached to discharge vessel.As a result, even use lamp for a long time, also can not produce melanism, lamp continues to light with stable illumination.
As not making before the beginning melanism suppress body to peel off and make its method that is fixed in anode surface reliably, preferably implement surface treatment to lighting from lamp manufacturing process.Make anode surface become coarse through surface treatment; So; Melanism suppresses body and is attached to anode surface securely, and in the process of the lamp manufacturing process of heated by electrodes processing etc., melanism suppresses body and can not peel off from anode surface; After the manufacturing before light lamp for the first time, melanism suppresses body and is firmly fixed at anode surface.
Especially, suppress body, can implement inject process so that melanism suppresses body and impact anode surface in order to utilize simple and easy method to adhere to melanism reliably.State anode jet surface melanism with high compression suppresses body, thus, forms concavo-convex state (pears skin state) at anode surface, and on the other hand, the melanism of impact suppresses the part subsidence on one side of body and in anode surface, impacts fixing on one side.Owing to be inject process, therefore, melanism suppresses body and is attached to anode surface with the state that disperses.
And; Make melanism suppress the recess that body is attached to anode surface, thus, it is outstanding from anode surface to prevent that melanism from suppressing body; Even in the vacuum exhaust processing of the lamp manufacturing process of vacuum exhaust processing etc. etc., in luminous tube, produce air-flow, melanism suppresses body and also can not peel off.
When the electrode metal evaporation of tungsten etc., the metal of evaporation swims in discharge vessel.In order after lighting beginning, to make melanism suppress evacuator body and be attached to the discharge vessel inner surface, better uses the melanism inhibition body that likens to the metal evaporation earlier of the electrode material of anode as early as possible.
And, in discharge vessel, enclose under the situation of mercury the discharge vessel of quartz etc. and mercury or mercury oxide reaction.In mercury got into the composition material of discharge vessel, it helped luminous mercury amount to reduce, and illumination can reduce.In order to prevent this situation, it is that following melanism suppresses body that preferred melanism suppresses body: compare with the composition material (quartz glass etc.) of discharge vessel, not with metal or metallic compound generation chemical reaction.
Suppress body as melanism, the metallic compound melanism of using the metal melanism to suppress body or metal oxide etc. suppresses body and gets final product.For example, the preferred aluminium oxide that uses not with quartz glass reaction.Aluminium oxide is the polycrystal of physical property and chemical stabilization, for example uses transparent alumina.
According to after the lamp starting, making melanism suppress the purpose of body fusion, evaporation as early as possible,, can confirm that melanism suppresses the zone of body fusion the most efficiently, evaporation about adhering to the anode surface zone that melanism suppresses body.
On the other hand, so that anode be above and be provided with under the situation of discharge lamp along the form of vertical direction configured electrodes, the Temperature Distribution of anode surface is distinctive.That is,, compare temperature step-down in the anode end face of electrode support rod side with electrode leading section near cathode side because from the negative electrode ejected electron, the anode leading section becomes the very state of high temperature.And, in discharge tube, produce convection current along anode outer peripheral face (side).
Therefore, adhere to melanism through outer peripheral face (side) and suppress body, thus, can make melanism inhibition body fusion in advance and be attached to the discharge tube inner surface along anode.Can also adhere to along circumferential part, can also make melanism suppress body and be attached to circumferential front surface.For example, under the situation that anode is made up of taper leading section and columnar body portion, the outer peripheral face that makes melanism inhibition body be attached to said main part gets final product.Especially, can analyze, can confirm in view of the above to suppress the zone that body evaporates the most easily, make melanism suppress concentrated this zone that is attached to of body along the axial melanism of electrode to the temperature of anode in lighting.
In order to make aluminium oxide be attached to anode surface reliably, preferred (for example along circumferential) forms and makes melanism suppress the fine groove (the for example groove of μ m degree) that body embeds.Melanism suppresses body and embeds in this fine groove, thus, is attached to anode surface easily.And when melanism suppressed evacuator body, fine groove was brought into play function as heat-dissipating structure.For example, forming fine groove according to the Temperature Distribution of anode at best region gets final product.
In order to increase the adhesion amount that melanism suppresses body, preferably forming the cross section along circumferential outer peripheral face at anode is the groove of wave (wavy).This groove is the groove (for example mm degree) that size is far longer than above-mentioned fine groove, forms the inclined plane at anode surface.As a result, can adhere to more melanism through surface treatment etc. and suppress body.For example, account temperature distributes, and is that the groove of wave gets final product in formation cross section, only zone.
When forming the micro concavo-convex of anode surface, in lamp manufacturing process, be easy to generate peeling off of protuberance, and foreign matters such as dust are attached to anode surface easily.In order to prevent this situation, at anode the external diameter reducing diameter part littler than anode external diameter is set, the surface that makes said melanism inhibition body be attached to said reducing diameter part gets final product.Being formed with under the situation of groove that fine groove, cross section are wave at anode surface, particularly outer peripheral face, also is effective.
On the other hand, for the melanism that makes evaporation suppresses body when the convection current in the discharge tube and be attached to the zone that is easy to generate melanism of discharge tube inner surface rapidly, end face forms recess and gets final product in the electrode support rod rear flank of anode.(cathode side) becomes ascending air along the air-flow that electrode support rod descends with the recess impact towards the below from vertical top; So, can transport melanism inhibition body to the zone that is easy to generate melanism of discharge tube inner surface by emphasis along the ascending air of anode outer peripheral face (side).The distortion of the discharge vessel that thus, can suppress to cause owing to melanism.For example, along the bigger groove of circumferential formation.
Method for producing discharge lamps of the present invention is characterised in that; Suppress body through inject process anode surface projection melanism; Make said melanism inhibition body dispersion and be attached to said anode surface; Through the temperature below the fusing point of said melanism inhibition body, antianode is used to remove the heat treated of impurity.
According to the present invention, can prevent the melanism of discharge vessel under the situation of miscellaneous flow chart.And accumulating of the thermal deformation of the discharge vessel that can suppress to cause owing to melanism prevents the breakage of discharge vessel.
Description of drawings
Fig. 1 is the summary section of the short arc discharge lamp of the 1st execution mode.
Fig. 2 is from the observed amplification view of the side of anode.
Fig. 3 is the amplification profile of the anode surface of the 2nd execution mode.
Fig. 4 is the anode planes figure of the 3rd execution mode.
Fig. 5 is the anode planes figure of the 4th execution mode.
Fig. 6 is the anode profile of the 5th execution mode.
Fig. 7 is before the inject process and the electron microscope enlarged photograph of the anode sides after the inject process.
Fig. 8 is the electron microscope enlarged photograph of the anode surface of the discharge lamp of observation present embodiment from the top.
Fig. 9 is an electron microscope enlarged photograph of observing anode surface from incline direction.
Label declaration
10: short arc discharge lamp; 12: luminous tube (discharge vessel); 20: negative electrode; 26: aluminium oxide; 30: anode.
Embodiment
Below, with reference to description of drawings execution mode of the present invention.
Fig. 1 is the summary section of the short arc discharge lamp of the 1st execution mode.
Short arc discharge lamp 10 has the luminous tube 12 of transparent quartz glass system, and in luminous tube 12, negative electrode 20 disposes with the mode with predetermined distance with anode 30 relatively.In the both sides of luminous tube 12, the sealed tube 13A of quartz glass system, 13B are connected setting and integrally formed with luminous tube 12.Enclose the inert gas of mercury and argon gas etc. among the discharge space S in luminous tube 12.
Be equipped with electrode support rod 17A, the 17B of the conductivity of supporting negative electrode 20 and anode 30 in the inside of sealed tube 13A, 13B.Electrode support rod 17A, 17B are connected with wire rod 15A, the 15B of conductivity via metal forming 16A, 16B respectively.The two ends of sealed tube 13A, 13B are blocked by lamp holder 19A, 19B, and sealing pipe 13A, 13B and be located at inner glass tube 21, glass bar (not shown) welding thus, seal luminous tube 12.
Fig. 2 is the amplification view of the observed anode of side from the side.
At outer peripheral face (side) 30C of the constant main part 30B of external diameter, transparent polycrystal is aluminium oxide 26 (Al
2O
3) disperse and attached in the adhering zone R.Adhering zone R is confirmed as the width that has regulation along the electrode axis directions X, spreads all over circumferentially all zones.In addition, confirm the width of adhering zone R along the anode surface Temperature Distribution of electrode axis X in can considering to light, can confirm as at least to comprise becomes the leading section of high temperature side anode surface and gets final product.
After oxidized aluminium knocked, the adhering zone R of the outer peripheral face 30C of anode 30 formed pears skin shape, concavo-convex.That is, become and have small concavo-convex rough surface.And the part of the aluminium oxide that impacts with outer peripheral face 30C penetrates (nipping) under the state of subsidence in outer peripheral face 30C, because the impact of self makes outer peripheral face 30C depression, and impacts and is fixed on the outer peripheral face 30C.
And, when shot-peening, outward side face 30C jet paraffin oxidation aluminium powder equably.Therefore, it is all that the aluminium oxide that adhere to is scattered in outer peripheral face 30C, sparsely disperses to exist.In carrying out surface-treated injection apparatus (not shown), set expulsion pressure, so that aluminium oxide directly adheres to after impacting outer peripheral face 30C.
After carrying out inject process, antianode 30 heats under vacuum environment.Low-melting temperature with ratio aluminum oxide is carried out heat treated, prevents alumina evaporation.For example, with about 1600 ℃ of antianodes, 30 heating a few minutes～dozens of minutes.Thus, the aluminium oxide and the outer peripheral face 30C that are attached to anode 30 fuse and fix, and, in the operation when electrode is assembled, remove the impurity that comprises in the electrode.
When after the lamp manufacturing, lighting start light, the temperature of anode 30 reaches near the fusing point (about 2000 ℃) of aluminium oxide.As a result, aluminium oxide 26 fusions, evaporation.Along with the process of the time of lighting, aluminium oxide 26 evaporates successively, and is final, and the almost whole aluminium oxide that are attached to anode 30 all separate from anode 30.The aluminium oxide of evaporation is through the thermal convections in the luminous tube 12 in the regulation zone attached to the inner surface of luminous tube 12.This zone becomes the zone that makes the metal geometric ratio be easier to adhere to through thermal convection.
Be attached to all aluminium oxide performances and coated film identical functions of inner surface of luminous tube 12.Promptly; Evaporation and the tungsten that swims, thorium or the mercury oxide that produces owing to Discharge illuminating and other impurity etc. can not be attached to the zone that is attached with aluminium oxide of the inner surface of luminous tube 12 in luminous tube 12; But be attached to the zone of not adhering to aluminium oxide, perhaps continue to swim.
Like this, according to this execution mode,, make aluminium oxide 26 under the state that disperses, be attached to side 30C through the outer peripheral face 30C jet paraffin oxidation aluminium of shot-peening anode 30.Then, carry out vacuum heating treatment, remove foreign gas at the following antianode 30 of the fusing point of aluminium oxide 26.When lighting start light, follow the temperature of anode 30 to rise aluminium oxide 26 fusions, evaporation.Then, the aluminium oxide of evaporation is attached to the inner surface of luminous tube 12.
The fusing point of tungsten is very high, still, when target front end face and anode front end face extremely heat, the tungsten evaporation.And, to enclose interior mercury of luminous tube and oxygen reaction and generate mercury oxide, this mercury oxide is attached to the luminous tube inner surface.The melanism that makes luminous tube of adhering to of this mercury oxide, tungsten is made progress.
On the other hand, aluminium oxide is transparent polycrystal, is that quartz glass is compared with the material of luminous tube 12, does not react with tungsten, mercury, the foreign gas that perhaps in Discharge illuminating, produces, charged particle etc., and is very stable.
In this execution mode, after the lamp manufacturing, light starting in the near future, alumina evaporation and be attached to luminous tube 12 inner surfaces.Adhering to of this aluminium oxide is more Zao than the evaporation of tungsten in time, and period is roughly the same with the thorium evaporation from the evaporation of cathode portion.As a result, the aluminium oxide 26 that is attached to anode sides 30C moves to earlier on the inner surface of luminous tube 12, to prevent melanism.
Therefore,, can not be attached to luminous tube 12 in luminous tube 12 yet, can prevent on the whole that tungsten, mercury oxide are attached to the luminous tube inner surface and make luminous tube melanism (transmissivity reduction) even tungsten, mercury oxide swim.And, in luminous tube 12, produce thermal convection, so the aluminium oxide emphasis of evaporation is attached to the zone that is easy to generate melanism of the inner surface of discharge tube 12, prevent luminous tube 12 melanism.
In lamp manufacturing process, do not carry out coating work and just can realize this defencive function based on coating, so, in lamp manufacturing process, do not need to be provided with especially miscellaneous operation.And then, as the Surface Finishing of electrode surface, carry out inject process, can adhere to aluminium oxide thus, do not need to be provided for especially adhering to the operation of aluminium oxide.
Aluminium oxide make anode surface coarse and be provided with under the concavo-convex state penetrate, nip or subsidence under the state on surface, adhere to, so aluminium oxide 26 is attached to anode surface reliably.Therefore, can prevent that lighting prestarting manufacturing process at lamp peels off midway.And then after anode was integrally formed, aluminium oxide adhered to and is fixed on anode surface.That is, compare with the situation of sneaking into anode interior, aluminium oxide can not form firm combination with anode surface, so in the time of near electrode temperature rises to the aluminium oxide fusing point, aluminium oxide evaporates from anode surface easily.
In discharge tube lighting, anode arrangement is in the negative electrode top, because the thermal convection in the discharge space produces upwelling along anode sides.In this execution mode, aluminium oxide is attached to anode sides, so aluminium oxide evaporates in early days, and, in discharge space, move fast owing to the convection current above electrode axis, be attached in the luminous tube.And then, distribute to confirm the adhering zone R of aluminium oxide according to the temperature of anode in lighting, so, can make alumina evaporation reliably.
In this execution mode, aluminium oxide is attached in discharge space easily when convection current and mobile anode sides still, also can make aluminium oxide be attached to anode surface part in addition.And, also can antianode jet paraffin oxidation aluminium powder, particle in addition.As the particle that will spray; So long as do not reduce the crystal with transparency of the transmissivity of luminous tube, promptly do not get final product with the material at the luminous tube internal convection, the physical property of compound generation chemical reaction and the particle (metallic particles, metal oxide etc.) of chemical stabilization of the luminous tube material of quartz glass etc. or tungsten, mercury, discharge gas etc.
As inject process, can utilize any means in sandblast, wet shotcrete technology (hydro-abrasion), the shot-peening to carry out.And, also can constitute and carry out Surface Machining through the method antianode beyond spraying and handle aluminium oxide is adhered to.And then the method beyond also can handling through Surface Machining (for example brute force push particle make it get into inside etc. from anode surface) makes Dispersion of Particles and is attached to anode surface.
Then, use Fig. 3 that the discharge lamp of the 2nd execution mode is described.In the 2nd execution mode, circumferentially be formed with fine groove along anode surface.In addition structure is identical with the 1st execution mode in fact.
Fig. 3 is the amplification profile of the anode surface of the 2nd execution mode.
At the surperficial 130C of anode 130,, form a series of groove with the mode that has Rack at direction of principal axis through the groove 130N (being called fine groove here) along circumferential formation fine pitch such as laser processing, blade processing, edm.
The recess 130G of fine groove 130N forms wedge-like (acute angle-shaped), when inject process, with the spacing 130J formation groove of micron (μ m) degree, so that aluminium oxide embeds among the recess 130G.The anode surface zone that is formed with fine groove 130N is a part or all zone of the adhering zone R shown in the execution mode 1, especially, confirms as the zone of the easy evaporation of aluminium oxide in lighting.
In order to prevent that the surperficial protuberance 130T that alternately occurs with fine groove 130N from peeling off (disappearance) and embed among the recess 130G of self, the spacing J of fine groove 130N confirms as relatively large.That is, the width of protuberance 130T is far longer than the width of recess 130G.
Through forming this fine groove, thus, through blasting treatment, aluminium oxide is attached to the surface more reliably, when lamp is made, also fits tightly.And, according to along the axial Temperature Distribution of electrode, form fine groove 130N in the zone of realizing alumina evaporation the most efficiently, so aluminium oxide reliably evaporates.And then behind alumina evaporation, the function of fine groove 130N performance radiating fin can prevent electrode overheating.
In addition, also can make aluminium oxide be attached to fine groove through the processing beyond the inject process.For example, can it be adhered to through anode pressed aluminium oxide.And, also can make the aluminium oxide adhering zone concentrate on specific zone more.
Then, use Fig. 4 that the discharge lamp of the 3rd execution mode is described.In the 3rd execution mode, be formed with the groove of wavy (cross section is a wave) at anode surface.In addition structure is identical with the 1st execution mode.
Fig. 4 is the anode planes figure of the 3rd execution mode.
At the outer peripheral face 230C of anode 230, be that regional W is formed with wavy groove 230W in the part of the adhering zone R of aluminium oxide.Wavy groove 230W is the groove that forms a series of serrated crosssection waveform along the electrode axis direction, is formed with the recess that is far longer than aluminium oxide particles (can visual identification).Here, through cut etc., circumferentially be formed with groove 230W along outer peripheral face 230C with millimeter (mm) degree.
Through along the wavy groove 230W of circumferential formation, thus, the enlarged areas of anode surface.Therefore, the adhesion amount of aluminium oxide increases, and through carrying out sandblast from incline direction, adhering to of aluminium oxide becomes easy.
In addition, same with the 2nd execution mode, also can make aluminium oxide be attached to fine groove through the processing beyond the inject process.And, also can constitute and on wavy groove, further form the fine groove of explaining in the 2nd execution mode.
Then, use Fig. 5 that the discharge lamp of the 4th execution mode is described.In the 4th execution mode, be formed with the less small diameter part of external diameter at anode surface.In addition structure is identical with the 3rd execution mode in fact.
Fig. 5 is the anode planes figure of the 4th execution mode.Be formed with small diameter part 330B with width Z at anode 330, compare with the external diameter of the end 330A electrode support rod near, the external diameter of this small diameter part 330B is less relatively.And, in a part of region R of anode surface 330C, be attached with aluminium oxide through blasting treatment.And then, along circumferentially being formed with wavy groove 330W at regional W.
Through form this small diameter part at anode, thus, can prevent that the aluminium oxide that adheres to from peeling off when lamp is made.And, prevent that aluminium oxide is attached to anode surface with the foreign matter of tiny dust etc.And then, prevent that the fine convex portion or the convex portion of fine groove that are formed on the surface through blasting treatment from peeling off, prevent that perhaps foreign matter from adhering to together.
In addition, also can aluminium oxide be adhered to through the method beyond the surface treatment of sandblast etc.And, also can not form wavy groove, can also not form fine groove.
Then, use Fig. 6 that the discharge lamp of the 5th execution mode is described.In the 5th execution mode, be formed with recess in the electrode rear side.In addition structure is identical with the 3rd execution mode in fact.
Fig. 6 is the anode profile of the 5th execution mode.To be formed with groove 430M in the electrode support rod side end face of anode 430 along the mode of circumferentially describing circle.Aluminium oxide is attached to region R, along circumferentially being formed with wavy groove 430W at regional W.
Through this recess that becomes depression being set in anode end face side, thus, the down current that in lamp is lighted, produces impact with electrode and with ascending air to above flow.The aluminium oxide that is equipped in this down current moves to easy the to be floating part in the discharge tube in advance, can concentrate on the zone that adhere to aluminium oxide in advance, improves to apply effect.
Below, the embodiment of discharge lamp is described.
[embodiment 1]
The discharge lamp of present embodiment is equivalent to the discharge lamp explained in the 1st execution mode.
Fig. 7 is before the inject process and the electron microscope enlarged photograph of the anode sides after the inject process.Shown in Fig. 7 (A), before inject process, anode sides is roughly level and smooth.On the other hand, the anode sides after the inject process becomes lusterless coarse state (pears skin state), becomes fine concaveconvex shape.In the enlarged photograph of Fig. 7 (B), part, the part that is attached with the electrode fragment and the aluminium oxide that has penetrated impacts anode sides and the part of under the state of nipping, fixing with having taken the sharp keen shape of aluminium oxide.
[embodiment 2]
Present embodiment is equivalent to the discharge lamp of the 2nd execution mode.
Fig. 8 is the electron microscope enlarged photograph of the anode surface of the discharge lamp of observation present embodiment from the top.Fig. 9 is an electron microscope enlarged photograph of observing anode surface from incline direction.
Can know according to Fig. 8, Fig. 9, along circumferentially being formed with the separation fine groove bigger than well width at anode surface.And a large amount of aluminium oxide embed, are attached to the part of fine groove securely.
[embodiment 3]
The discharge lamp of present embodiment is equivalent to the discharge lamp explained in the 5th execution mode.
Suppress the experiment of the effect of luminous tube melanism when being used to confirm to make aluminium oxide be attached to anode surface.The short arc discharge lamp of embodiment has the luminous tube that is made up of quartz glass of external diameter 121mm, volume 885cc.In luminous tube, enclose the mercury of about 30mg/cc.And, enclose argon gas so that be approximately 190kPa during normal temperature.
Anode is the tungsten electrode that comprises the potassium of percentage by weight about 0.002%.Negative electrode is the thorium oxide (ThO of percentage by weight about 2% of having mixed
2) tungsten cathode, interelectrode distance approximately is set at 12mm.Shape shown in anode and cathode shape and the above-mentioned execution mode is roughly the same.Be formed with the taper leading section at negative electrode.
Jet paraffin oxidation aluminium (Al is carried out in the side that is formed with wavy groove of antianode
2O
3) inject process, Surface Machining is carried out in the antianode side.Use the alumina powder of the about 115 μ m of particle diameter, make alumina powder impact the regulation zone of anode sides, carry out Surface Finishing with the expulsion pressure of gas-pressurized, and, aluminium oxide adhered to.
On the other hand, as comparative example,, prepare short arc discharge lamp with the present embodiment same structure except the adhering to of aluminium oxide.
Then, carry out the affirmation experiment of alumina evaporation.Here, antianode carries out heat treated under vacuum environment, produces the electrode temperature environment (more than 1500 ℃) when in fact lamp is lighted, with the high electrode temperature investigation aluminium oxide residual quantity of the low-melting electrode temperature of ratio aluminum oxide, ratio aluminum oxide fusing point.
During with heated by electrodes to 1500 ℃, aluminium oxide is residual, and still, when being heated to 2200 ℃, aluminium oxide is not residual.
Then, carry out through making aluminium oxide be attached to the affirmation experiment that anode surface prevents melanism.Here, to the short arc discharge lamp of the foregoing description, light with the power of 12kW, the melanism state of the luminous tube inner surface after 1000 hours is lighted in inspection.
Measure the illumination sustainment rate through near the illuminance meter that 350nm, has photosensitivity.Do not form wavy groove, the illumination sustainment rate that does not carry out the existing lamp that the aluminium oxide based on blasting treatment adheres to is 67%, and relative therewith, the illumination sustainment rate of this lamp of embodiment is 75%, has confirmed to suppress the melanism of luminous tube.
Claims (16)
1. a discharge lamp is characterized in that, this discharge lamp has:
Discharge vessel; And
The anode and the negative electrode that in said discharge vessel, dispose relatively,
At least be formed with at anode surface small concavo-convex,
Melanism suppresses the body dispersion and is attached to said anode surface, evaporation when lighting.
2. discharge lamp according to claim 1 is characterized in that,
Said melanism suppresses body and likens the metal evaporation earlier into the electrode material of said anode to.
3. discharge lamp according to claim 1 and 2 is characterized in that,
Compare with the composition material of said discharge vessel, said melanism suppresses metal or the metallic compound generation chemical reaction that body does not swim when lighting in said discharge vessel.
4. discharge lamp according to claim 1 and 2 is characterized in that,
It is metallic particles or metal compound particles that said melanism suppresses body.
5. discharge lamp according to claim 1 and 2 is characterized in that,
Said melanism suppresses body and comprises aluminium oxide.
6. discharge lamp according to claim 1 and 2 is characterized in that,
Said melanism suppresses the recess that body is attached to said anode surface.
7. discharge lamp according to claim 1 and 2 is characterized in that,
Through making said melanism suppress the inject process that body impacts said anode surface, said anode is carried out surface treatment,
Said melanism suppresses body and in said anode surface, impacts fixing in subsidence.
8. discharge lamp according to claim 1 and 2 is characterized in that,
Said melanism suppresses body and is attached to the anode outer peripheral face.
9. discharge lamp according to claim 1 and 2 is characterized in that,
Said anode has taper leading section and columnar body portion,
Said melanism suppresses the outer peripheral face that body is attached to said main part.
10. discharge lamp according to claim 1 and 2 is characterized in that,
Outer peripheral face at said anode is formed with fine groove, embeds so that melanism suppresses body.
11. discharge lamp according to claim 10 is characterized in that,
The groove of said fine groove is spaced apart more than the size of said melanism inhibition body.
12. discharge lamp according to claim 1 and 2 is characterized in that,
Outer peripheral face at said anode is formed with the groove that the cross section is a wave.
13. discharge lamp according to claim 1 and 2 is characterized in that,
Said anode has the external diameter reducing diameter part littler than anode external diameter,
Said melanism suppresses the surface that body is attached to said reducing diameter part.
14. discharge lamp according to claim 1 and 2 is characterized in that,
Said anode contains potassium.
15. discharge lamp according to claim 1 and 2 is characterized in that,
End face is formed with recess in the electrode support rod rear flank of said anode.
16. a method for producing discharge lamps is characterized in that,
Suppress body through inject process anode surface projection melanism, make said melanism inhibition body dispersion and be attached to said anode surface,
Under the temperature below the fusing point of said melanism inhibition body, antianode is used to remove the heat treated of impurity.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-180050 | 2010-08-11 | ||
| JP2010180050A JP5580136B2 (en) | 2010-08-11 | 2010-08-11 | Discharge lamp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102376523A true CN102376523A (en) | 2012-03-14 |
| CN102376523B CN102376523B (en) | 2016-01-20 |
Family
ID=45794950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110209299.8A Active CN102376523B (en) | 2010-08-11 | 2011-07-25 | Discharge lamp |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5580136B2 (en) |
| KR (1) | KR101753408B1 (en) |
| CN (1) | CN102376523B (en) |
| TW (1) | TWI500069B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6483020B2 (en) * | 2013-07-22 | 2019-03-13 | 株式会社オーク製作所 | Discharge lamp, discharge lamp manufacturing method, and discharge lamp electrode |
| JP6294901B2 (en) * | 2015-03-31 | 2018-03-14 | Ｈｏｙａ Ｃａｎｄｅｏ Ｏｐｔｒｏｎｉｃｓ株式会社 | Mercury discharge lamp |
| JP7198611B2 (en) * | 2018-08-28 | 2023-01-04 | 株式会社オーク製作所 | Discharge lamp and method for producing electrode for discharge lamp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57158941A (en) * | 1981-03-27 | 1982-09-30 | Toshiba Corp | Metal halide lamp |
| JP2004259639A (en) * | 2003-02-27 | 2004-09-16 | Allied Material Corp | Discharge lamp and its electrode structure |
| CN101271820A (en) * | 2007-03-23 | 2008-09-24 | 株式会社Orc制作所 | Discharge lamp and method for manufacturing electrode of the same |
| CN101271819A (en) * | 2007-03-23 | 2008-09-24 | 株式会社Orc制作所 | Discharge lamp |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6369502B1 (en) * | 1999-11-29 | 2002-04-09 | General Electric Company | Low pressure mercury vapor discharge lamp with doped phosphor coating |
| JP2009104865A (en) * | 2007-10-23 | 2009-05-14 | Seiko Epson Corp | Discharge lamp, light source device, projection type display device |
| JP4650562B2 (en) * | 2008-12-03 | 2011-03-16 | ウシオ電機株式会社 | Short arc type discharge lamp |
| JP2009105059A (en) * | 2009-01-05 | 2009-05-14 | Allied Material Corp | Electrode structure for discharge lamp |
| JP5325615B2 (en) * | 2009-03-12 | 2013-10-23 | 株式会社オーク製作所 | Discharge lamp |
-
2010
- 2010-08-11 JP JP2010180050A patent/JP5580136B2/en active Active
-
2011
- 2011-06-07 TW TW100119749A patent/TWI500069B/en active
- 2011-07-08 KR KR1020110067852A patent/KR101753408B1/en active IP Right Grant
- 2011-07-25 CN CN201110209299.8A patent/CN102376523B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57158941A (en) * | 1981-03-27 | 1982-09-30 | Toshiba Corp | Metal halide lamp |
| JP2004259639A (en) * | 2003-02-27 | 2004-09-16 | Allied Material Corp | Discharge lamp and its electrode structure |
| CN101271820A (en) * | 2007-03-23 | 2008-09-24 | 株式会社Orc制作所 | Discharge lamp and method for manufacturing electrode of the same |
| CN101271819A (en) * | 2007-03-23 | 2008-09-24 | 株式会社Orc制作所 | Discharge lamp |
Also Published As
| Publication number | Publication date |
|---|---|
| TW201222621A (en) | 2012-06-01 |
| JP2012038674A (en) | 2012-02-23 |
| JP5580136B2 (en) | 2014-08-27 |
| KR101753408B1 (en) | 2017-07-04 |
| CN102376523B (en) | 2016-01-20 |
| KR20120015262A (en) | 2012-02-21 |
| TWI500069B (en) | 2015-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20200156153A1 (en) | Method and system for manufacturing of three dimensional objects | |
| KR100670688B1 (en) | Short-arc high-pressure discharge lamp | |
| CN101047105B (en) | High-pressure discharge lamp | |
| KR101326331B1 (en) | Short arc type discharge lamp | |
| US8400060B2 (en) | Short arc type discharge lamp | |
| US20120001542A1 (en) | Short arc type discharge lamp | |
| CN1783416A (en) | Discharge lamp | |
| CN102376523A (en) | Discharge lamp | |
| US6437508B1 (en) | Short-arc discharge lamp | |
| US8497632B2 (en) | Short arc type discharge lamp | |
| JP5325615B2 (en) | Discharge lamp | |
| CN102034672A (en) | Discharge lamp | |
| US20100045185A1 (en) | Cathode for discharge lamp and discharge lamp using the same | |
| KR101997296B1 (en) | Ultraviolet light generating target, electron-beam-excited ultraviolet light source, and method for producing ultraviolet light generating target | |
| JP2007287705A (en) | Short arc type high pressure discharge lamp | |
| JP5584093B2 (en) | Cathode for short arc discharge lamp and method for producing the same | |
| JP2006244859A (en) | Field electron emission type lamp | |
| RU2597447C2 (en) | Laser method for production of functional coatings | |
| WO2012007146A1 (en) | Method of improving the operation efficiency of a euv plasma discharge lamp | |
| CN1362591A (en) | Luminescent structural body, light-emitting method and lighting source | |
| JP2008047548A (en) | Short-arc type high-pressure discharge lamp | |
| JP5765953B2 (en) | Cathode for short arc discharge lamp and arc discharge method | |
| JP2009115326A (en) | Plasma melting device and method, and crucible | |
| JP2017157299A (en) | Laser-driven light source | |
| JP2002270135A (en) | Light emitting structure, method of light emission and illuminator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |