SU1043764A1 - Gas-discharge high-pressure lamp sealed current lead-in - Google Patents

Abstract

HERMETIC CURRENT IN A HIGH-PRESSURE GAS DISTRIBUTIVE LAMP, containing a cap with a holder / electrical housing for the cap, tightly connected to a polycrystalline or monocrystalline lamp casing. . using an inorganic solder located between the surfaces of the shell and facing each other. cap, about tl and h and y and i with the fact that, in order to turn around its reliability, on the specified surface of the cap is discharged at least two annular grooves, the ratio of the total width of which to the length of the surface is contiguous. with a shell of 0.1-0.5.

Description

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iu The invention relates to high pressure lamps with alkaline tanks, in particular, to the construction of a current input into a ceramic or monocrystalline tube. Known discharge lamps with high-pressure metal cages in which the ceramic shell has a sealing element in the form of a ceramic ring fixed in the shell by sintering, the gap between the sealing element protruding above the edge of the discharge shell and the current lead filled with solder glass f 1 . The disadvantage of the described construction is the need to preliminarily fix the ceramic ring in the shell by sintering, and then seal the current lead with the help of solder glass. Separating the process of soldering the electrode assembly into two operations increases the TE capacity, increases the energy consumption and, apart from the implementation of such a construction with a single-crystal tube, is impossible due to the absence of its shrinkage when heated. Sealed current leads are known in a high pressure gas discharge lamp containing a cap connected to an electrode holder. The cap is sealed to the polycrystalline or single-crystal sheath of the lamp by means of inorganic solder located between the surfaces of the sheath and the cap C 2} facing each other. The disadvantage of this design is the unreliability of the connection of the niobium cap with the shell. The diameter of the niobium cap is usually made slightly smaller than the diameter of the hole in the ceramic tube. An inorganic solder suspension is applied to the cap surface, after which the cap with the shell is assembled. Due to the fact that the gap is usually made small, a portion of the solder slurry may not get into with. a continuous layer between the cap and the ceramic tube, and after melting the solder, through pores may remain. Applying excess inorganic solder to the outside of the seam also does not always lead to the desired result (vacuum tightness), since when the lamp is soldered, the end of the current lead is always in the tilted position. Therefore, inevitably run-off of excess solder current leads and violation of vacuum tightness. The aim of the invention is to improve the reliability of the sealed current lead. The goal is achieved by the fact that on the surface of the cap facing the surface of the shell. At least two annular grooves are made, the ratio of the total width of which to the length of the surface of contact between the cap and the lug is 0.1-0.5. The drawing shows a current lead, a partial section. The cap 1 is connected to the sapphire sheath 2 using an inorganic solder 3. The cap is made of niobium alloy and is welded to the electrode holder 4. On the surface of the cap.packa facing the surface of the sapphire shell / there are three grooves, each 1 in width. The ratio is D - nt x where n is the number of grooves, our case. Before soldering the cap with sapphire shell, a suspension of inorganic solder is applied to the cap, and the suspension in the grooves is fully preserved when the cap with the tube is assembled. This allows internal spas. And at a great distance. SRI-OT of the shell end, since with a conventional cap design (without grooves on the surface, contact through solder with the shell) apply evenly the solder suspension into the gap between the shell and the cap (usually 0.05 mm), which is at a great depth and impossible. The suspension is applied in a thin, even layer onto the surface of the cap. It is inserted into the shell. and is inserted into the shell. In this part of the suspension is removed from the surface of the cap due to friction against the wall of the shell and remains on it. walls outside the spa area. As a result, discontinuities in the spa may occur. In the presence of grooves when assembling the current lead with a shell, the suspension is soldered: in canals, completely / and when made by soldering, due to the action of capillary forces, it is pulled out of the grooves having - hubble h, and is distributed evenly in the ring -. vom gap n. between the shell and cap. The limits of permissible values are due to the following: a minimum of 0.1 is determined not to be sufficient to provide grooves sufficient to place an inorganic solder in them (Enough to form a solid gap over the gap). From this it follows LH The upper limit, 5 is determined by the need for ensure sufficient.

3 D0437644 ...

the total working width of the spa available with the K-Rb filling, which is osvaizazor. D. | s in production. Specified

The proposed node design is 2-2.5 times more efficient.

fastening the current lead in a leucosap. as compared to those used in the shell, krypton lamps were implemented at a current time

pumping) continuous mode lasers5 with a shell of quark glass.

Claims (1)

SEALED CONDUCTOR TO A GAS DISCHARGE LAMP OF HIGH PRESSURE, 'containing a cap connected to the holder / electrode, hermetically connected to the polycrystalline or single crystal shell of the lamp c. using inorganic solder located between the surfaces of the shell and cap facing one another, with the exception that, in order to increase its reliability, at least two annular grooves are made on said surface of the cap, the ratio of the total width of which to the length of the contact surface of the cap with the shell is 0.1-0.5 ..