SU936090A1 - High-intensity gas-discharge lamp - Google Patents

Description

(5) DISCHARGE HIGH-INTENSITY LAMP

one

This invention relates to gas-discharge sources of high-intensity light and can be used in production. continuous and pulsed emission lamp.

High-intensity discharge lamps are known that contain an optically transparent flask in which electrodes are mounted, mounted on rod holders, by means of sealed current leads connected to external leads l.

High-intensity gas-discharge lamps with cylindrical foil current leads are also known, in which the gas absorbers, mainly made of sintered titanium 2}, are located in the electrode areas of the bulb.

Owing to the absorption properties of the gas absorber, the gas filling of the lamp is maintained for a long time, which is accompanied by an increase in the life of the lamp.

lamp service. However, a certain temperature range is required for efficient operation of the getter, for example, for sintered

5 titanium is 200-800C, therefore the limiting power of the known lamps should be limited so that the getter located behind the hot electrode does not overheat above the allowable

10 values.

The closest to the technical essence of the invention is a high-intensity discharge gas discharge lamp, containing an optically transparent flask, for example a tubular quartz one, in which electrodes are installed, by means of cylindrical foil current leads connected to external leads, and a gas absorber is installed behind the end surface of each electrode. of sintered titanium, and between the end surfaces of the electrode and gas-gas 39360904

The thermal screen is installed in the Simultaneously Zoom

the form of corrugated metal dis-diameter is not less than 1.5 times

forks whose diameter does not exceed the excess diameter of the getter

diameters of the electrode and gas absorption, protects the gas absorption more reliably. These discs block the path of the cable as from heating effect

the radiant flux from the end of the electrode-beam flux of the electrode and the plasma

to the getter, which reduces the discharge, so that from its dusting the temperature of the latter and ensuring the erosion of the electrode, which preserves its effective operation when its absorption properties improve

power of the lamp zd. Surfaces, which contributes to an increase in this structure, however, does not affect longevity. Stability is tive when the getter of lamp hardening is provided with a bullet on the power supply rod, by creating conditions for a selective electrode that has an electrode installed, since the gas absorption for which the cylinder is in this case most of the heat,. t $ gas getters occupy the precipitate portion of the holder coming from the gas absorber from the heat dissipated electrode to 1500–2000 ° C, the vivifying disk to the hermetic zone is transferred to the specified metal-inlet. In this case, the gas-absorbing zones are heated to the rastema rod having significant individual temperatures thermal conductivity. Therefore, the body is absorbed by various kinds of gaseous gas absorber, most effectively absorbed farther from the electrode, but also with the gas absorber material, in particular, since the space in the titanium in the atmosphere, with different tempere parts, is limited within the optimum gas absorber that not out of range. Reliable thermal contact is heated above the optimum values, the disks with the holder are simply too small to be effectively absorbed when the disks fit tightly or when the lamp rods of the holders come off when burning, while the gases are harmful. In this case, the lamp is burning, the coefficient of thermal expansion is unstable, and the reliability with an ekstreshni equal to or greater than the same operation without a forced oh-coefficient of the disk, reliable heat recovery is small. Your contact is maintained throughout the whole range of the invention. and durability of the lampgo knot.

while simplifying the technology The drawing shows the principle of the design of the proposed lamp.

Claims (3)

The goal is achieved by the fact that in a gas tube in a tubular quartz flask 1 discharge high-intensity lamp, electrodes containing an optically transparent count-2 are placed on both sides, mounted on a rod holder, for example, a tubular quartz bulb, in which 3 are installed on electrodes electrodes, co-.2 tightly mounted heat dissipating dined by means of sealed metal discs 4, protruding covods located in a lamp in a flask above the electrodes and gas vapor, with external leads, and interlocking 5 on derda with electrodes and current leads installed by consumers 3 behind disks 4. Holders 3 are cylindrical getters welded to flat foil current-predominantly from sintered titanium, inputs 6, in turn welded and between the electrodes and gas-absorber to external terminals 7. Gas cylinders at least the popglotite 5 is located pressed from a titanium-metal metal disk, the setting powder, the electrodes 2 are made to a folded square perpendicular to the axis of the leg, the tungsten-based and activating disks have a central opening These are alkaline-earth metals, the electrode is connected to the current lead with holder 3 made of tungsten or with a rod holder, on co-molybdenum, and the disks “—the specified absorbent gas-absorbing metal-absorbing material is installed from the high thermometer, and the outer, mainly from tantalum and its disc meter is larger than the diameters of the electro-alloys. Number of drives but it is less experimentally determined by the condition of the inner diameter of the bulb foot to create the most optimal utilization of the getter 5. The lamp is filled with xenon under a pressure of less than 100 mm Hg, st. When turned on, the lamp is ignited by means of low-power high-voltage pulses, and after heating the electrodes to a significant thermal emission, it continues to burn due to a pulsed voltage of variable polarity (50 Hz) supplied from a powerful power source. During lamp burning, the electrodes are heated to ISOO-ZOGO C, however, due to the presence between the discharge area of the flask where the electrodes are located, and there is also a hot discharge plasma, and an over-electrode area where the titanium getters absorb, there are larger diameter disks made of tantalum alloy, at the same time serving as heat dissipating radiators, high-temperature getters and screens from the effect of the radiant flux of plasma and electrodes, the temperature of the titanium getters remains at optimum for their effect. objective work limits. Therefore, even with overheating of the lamp, which is observed without forced cooling, all the harmful gases emitted by the parts are effectively absorbed. Thus, the causes of the increase in the ignition voltage of the lamp when it is burning are eliminated; therefore, it works stably when powered with a pulsed TQKOM of alternating polarity without additional triggering of the interelectrode gap. The proposed design of the gas discharge. Noah high-intensity lamp ensures a stable lamp burning during the entire service life, which is more than in the known. The burning stability is ensured when the lamp is supplied with a pulsed current of alternating polarity without additional initiation of discharge. Unlike commercially available lamps, the proposed lamp also stably burns without forced cooling at elevated ambient temperatures, which simplifies the apparatus in which it is used. With increased reliability, lamps are more technologically known in the assembly, and the percentage of usable products during mass production increases. Claim 1. A gas discharge lamp is a high-intensity lamp containing an optically transparent flask, for example, a quartz tube, in which electrodes are mounted on opposite komts, each of which is connected to an external outlet by means of a current-supply at least one cylindrical the gas absorber located in the over-electrode area and at least one metal disk located perpendicular to the axis of the leg between the ends (electrode and gas-absorber surfaces) In order to increase reliability and durability while simplifying the lamp manufacturing technology, these metal discs are made with central holes, and the electrode is connected to the current lead with a rod holder, on which these discs and getters are installed, and the outer diameter of the discs greater than the diameters of the electrodes and getters, but less than the inner diameter of the lamp leg.; 2. The lamp according to claim 1, about ton l and h - y, and a. the fact that the disks are made of high-temperature gas absorption metal, mainly tantalum and its alloys. 3. The lamp according to claim 1 and 2, characterized in that the cylindrical getters occupy the entire area of the holder from the disk to the zone of entry of the holder into the material of the leg. k. Lamp on PP. 1-3, about t l and that the diameter of the discs is not less than 1.5 times the diameter of the gas absorbers. 5. Lamp Popp. I-, characterized in that the disks are tightly mounted on the rod holder, while the coefficient of thermal expansion of the material of the disk does not exceed the coefficient of thermal expansion of the material of the holder. Sources of information, rintye taken into account during the examination 1.G.Rokhlin. Gas-discharging sources of light, M.-L., Energie, 19bЗ. 2. Author's testimony of the USSR f 760239, cl. H 01 J 61/36, 1978. 3. USSR author's certificate of application No. 2883 U, l. H 01 J 61/36, 1980. 2 3