JP2016048632A - Water cooling type light source device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve downsizing of a light source device and provide a structure in which a joint between a sealing part and a cooling mechanism is secure in a water cooling type light source device including a light emitting pipe, which comprises a light emitting part and a sealing part, and a water cooling mechanism which water-cools the sealing part of the light emitting pipe.SOLUTION: The water cooling mechanism comprises: a sealing cap which is sealed by a low melting metal at an exterior part of the sealing part and extends in the sealing part to be sealed in a tip part; a coolant lead-out pipe extending into the sealing cap; a water cooling jacket formed separately from the sealing cap and fitting on an outer peripheral part of the sealing part, the water cooling jacket through which the lead-out pipe penetrates; and a coolant introduction pipe connected with the water cooling jacket. A coolant from the introduction pipe flows in the outer peripheral part of the sealing part and is introduced into the sealing cap to be flown out from the lead-out pipe.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a water-cooled light source device used for a solar simulator light source, and more particularly to a water-cooled light source device having a cooling water channel in a sealing portion.

Conventionally, water-cooled light source devices have been used as light source devices for solar simulators and the like.
For example, in Japanese Utility Model Publication No. 48-19499 (Patent Document 1) and Japanese Patent No. 3075094 (Patent Document 2), a hollow path is provided in the sealing portion of the arc tube, and the light source device is operated during the operation. By circulating cooling water through the hollow path, a technology that can suitably cool the sealing portion and the electrode, suppress deterioration due to high heat, and provide a light source device with high output and long life is disclosed.

The specific structure is shown in FIG. In this light source device, a cooling water introduction tube 54 is inserted into an electrode 53 in the sealing portion 52 of the arc tube 51, and a cooling water channel 55 is formed in the electrode 53. In addition, a cap cap 56 is provided at an end of the sealing portion 52, and a cooling water channel 57 is formed therein.
The cooling water flows from the cooling water introduction pipe 54 through the cooling water path 55, flows through the cooling water path 57 in the base cap 56, and is discharged from the cooling water outlet pipe 58.
During this time, the sealing portion 52 and the electrode 53 of the arc tube 51 are cooled, and the bonding layer 59 provided between the sealing portion 52 and the cap 56 is prevented from being melted by heat during operation. doing.

In the water-cooled light source device according to the above-described prior art, both members are joined with a joining layer interposed between the sealing portion and the cap. And in the said light source device, since it is necessary to form a cooling water channel in the inside of a cap, the size must be designed large, and it will increase in size and weight. This increases the load on the bonding layer (bonding interface), and there is a problem that it becomes difficult to maintain the airtightness by peeling off the bonding surface.
On the other hand, the joining means of the sealing part, which is a glass member, and the base cap, which is a metal member, is limited, and it has been difficult to firmly join them.
In particular, the light source device requires not only maintenance of airtightness in the arc tube but also maintenance of a water cooling mechanism inside the cap, and there is also a problem that a stress load accompanying a difference in thermal expansion between both members must be taken into consideration. .

Japanese Utility Model Publication No. 48-19499 Japanese Patent No. 3075094

  The problem to be solved by the present invention is a water-cooled type equipped with a light-emitting tube composed of a light-emitting portion and a sealing portion, and a water-cooling mechanism for water-cooling the sealing portion of the light-emitting tube, in view of the problems of the prior art. In the light source device, the light source device is miniaturized and a structure in which the sealing portion and the water cooling mechanism are firmly joined is provided.

  In order to solve the above-described problems, a water-cooled light source device according to the present invention includes a water-cooling mechanism sealed with a low-melting-point metal outside the sealing portion, and extending to the inside of the sealing portion. A sealing cap hermetically sealed with, a cooling water lead-out pipe extending to the inside of the sealing cap, and the sealing cap, which are separate from each other and fitted on the outer peripheral portion of the sealing portion and the lead-out A water cooling jacket through which the pipe penetrates and a cooling water introduction pipe connected to the water cooling jacket. Cooling water from the introduction pipe flows through the outer periphery of the sealing portion and is introduced into the sealing cap. And flowing out from the outlet pipe.

Further, the water-cooling jacket is attached to the sealing portion with a sealing member interposed by a sealing ring externally fitted to the sealing portion.
In addition, a buffer member is provided between the sealing cap and the water cooling jacket on an end surface orthogonal to the axial direction of the sealing cap.
Further, the water-cooling jacket attached to both end sealing portions of the arc tube is provided with a connecting fixture for compressing the water-cooling jackets in the axial direction.
Further, a metallized layer is formed on the outer peripheral surface of the sealing portion at a portion where the sealing cap is sealed with a low melting point metal.

  According to the water-cooled light source device of the present invention, the sealing cap extends to the inside of the sealing portion and is sealed at the tip portion, and the cooling water lead-out tube extends to the inside, and is separate from the sealing cap. Since the water cooling jacket of the body is externally fitted to the outer peripheral portion of the sealing portion, the cooling water outlet pipe is penetrated through the jacket, and the cooling water introduction pipe is connected to the water cooling jacket. Water flows through the outer peripheral portion of the sealing portion, is introduced into the sealing cap, and flows out from the outlet pipe. The water cooling mechanism is extremely compact, and the sealing portion is effectively cooled. Become. In addition, since the cooling water directly flows and cools the joint portion between the sealing portion and the sealing cap, the joint portion does not peel off due to a temperature rise.

Sectional drawing of the water cooling type light source device of this invention. The exploded view (A) of the principal part of FIG. 1, the elements on larger scale (B) of the B part, and the fastening structure figure (C) of the C part. FIG. 3 is an enlarged perspective view of a portion (connection member) in FIG. 2. The perspective view of the part (connection fixing tool) of FIG. Sectional drawing of a prior art example.

1 is a cross-sectional view of a water-cooled light source device of the present invention, and FIG. 2 is an exploded view (A) of a main part of FIG. 1, a partially enlarged view of a B part (B), and a tightening structure diagram of a C part (C ).
The water-cooled light source device 1 of the present invention includes an arc tube 2 including a light-emitting unit 3 in which a luminescent gas is sealed and sealing units 4 and 4 extending at both ends thereof, and a water-cooling mechanism 10 that cools the sealing unit 4. Consists of.
The water cooling mechanism 10 is sealed outside the sealing portion 4, extends into the sealing portion 4, and is sealed at the tip portion; and cooling water extends to the inside of the sealing cap 11. The lead-out pipe 15 includes: a water-cooling jacket 20 that is fitted on the outer periphery of the sealing portion 4 and through which the lead-out pipe 15 passes; and a cooling water introduction pipe 26 that is connected to the water-cooling jacket 20.

Hereinafter, the water cooling mechanism 10 will be described in detail.
As shown in FIG. 2A, a metal sealing cap 11 is inserted into the sealing portion 4 of the arc tube 3, and its tip end faces the light emitting portion 3 and is sealed. In this embodiment, the electrode 5 is attached to the tip.
And while the collar part 11a of the sealing cap 11 contact | abuts to the rear-end surface of the sealing part 4, the cylindrical edge part 11b extended along the outer peripheral surface of the sealing part 4 from the peripheral part of this collar part 11a, The sealing part 4 is sealed with a low melting point material.

The details are shown in FIG. 2B, and the thin cylindrical edge portion 11b of the sealing cap 11 is sealed by a bonding layer 12 such as a solder alloy, a low melting point alloy based on indium or tin. Sealed to the stop 4.
At this time, it is desirable that a metallized layer 13 is formed on the outer periphery of the sealing portion 4 made of glass such as quartz glass at a portion where the sealing cap 11 is sealed.
It is possible to use frit glass or the like as the bonding layer 12, but a form using a low melting point metal is desirable. This is a problem that often causes a load due to a difference in thermal expansion in joining a glass member and a metal member. However, a low melting point metal has a role as a stress buffer because it is a material that is relatively plastically deformed. This is because the load accompanying the thermal expansion difference can be suppressed.

The sealing cap 11 is inserted with a cooling water outlet pipe 15 extending to the tip of the inside, and a connecting member 16 is attached to the outer periphery of the sealing cap 11 by welding or the like.
Details of the connecting member 16 are shown in FIG. The connecting member 16 includes a cylindrical main body portion 17 through which the cooling water outlet pipe 15 is inserted, and a flange portion 18 including a large-diameter flange portion 18a and a small-diameter flange portion 18b. 19, one end opening 19 b is opened in the sealing cap 11, and the other end opening 19 a is opened in a water cooling jacket 20, which will be described later. 20 is communicated.
The connecting member 16 fixed to the outer periphery of the cooling water outlet pipe 15 is inserted into the sealing cap 11 at the small diameter flange 18b, and the large diameter flange 18a contacts the flange 11a of the sealing cap 11 for positioning. Is done.

The connecting member 16 is inserted and fixed to the water cooling jacket 20. The water cooling jacket 20 includes a cylindrical casing 21 and a cylindrical partition member 22 incorporated therein, and the partition member 22 includes a cylindrical member 22a and a fixed plate 22b. An attachment opening 23 is formed in the partition member 22, and the cylindrical main body portion 17 of the connecting member 16 is penetrated and fixed to the attachment opening 23.
At this time, a buffer member 25 is provided between the connecting member 16 and the water cooling jacket 20 on the end surface orthogonal to the axial direction of the sealing cap 11. It is in contact with the direction and is in a watertight state. A cooling water introduction pipe 26 is attached to the fixed plate 22 b of the water cooling jacket 20.
That is, the mounting opening 23 of the water cooling jacket 20 is fitted into the cylindrical main body portion 17 of the connecting member 16 attached to the cooling water outlet pipe 15 so that both are attached in a watertight state. 18 b is inserted into the sealing cap 11 and fixed.

Further, as shown in FIG. 2C, a sealing ring 27 is externally mounted on the sealing portion 4, and the water cooling jacket 20 is attached to the sealing ring 27. That is, the male screw 21a engraved on the outer periphery of the cylindrical casing 21 of the water cooling jacket 20 and the female screw 27a engraved on the inner periphery of the sealing ring 27 are fastened and fixed to each other by screwing together. The At this time, a sealing member 28 such as an O-ring is interposed between the sealing ring 27 and the water cooling jacket 20, and the water cooling jacket 20 is attached to the sealing portion 4 in a watertight state from the outside.
Thereby, the cooling water W introduced from the cooling water introduction pipe 26 flows through the outer periphery of the partition member 22 to reach the inside thereof, flows along the outer peripheral part of the sealing portion 4 of the arc tube 3, and is further connected to the connecting member. The 16 communicating holes 19 reach the inside of the sealing cap 11 and are introduced to the tip side. Thereby, the sealing part 4 is cooled and the electrode 5 at the tip of the sealing cap 11 is cooled.
Then, the cooling water W is led out of the system from the cooling water outlet pipe 15 inserted up to the tip of the sealing cap 11.

Further, as shown in FIG. 1, the water-cooling jackets 20 and 20 attached to the sealing portions 4 and 4 on both sides are attached with connecting fixtures 30 so that they are compressed in the axial direction and pulled toward each other. ing.
As shown in FIG. 4, the connection fixture 30 includes a pair of holding portions 31, 31 and connection portions 32, 32 that connect them. The holding part 31 is in contact with the rear end side of the water-cooling jacket 20, and is compressed so that the water-cooling jackets 20, 20 are attracted to each other by screwing the connecting part 32. Thereby, the water cooling jackets 20 and 20 are firmly attached to the sealing portions 4 and 4.
In addition, in FIG. 4, although the thing of a different structure was described as a pair of holding | maintenance part 31, 31, it is needless to say that the same structure may be sufficient.

In this embodiment, the electrode 5 is described at the tip of the sealing cap 11. However, the electrode 5 may be applied to an arc tube of an electrodeless lamp. The tip of the sealing cap 11 only needs to be sealed.
Further, the one inserted into the sealing cap 11 is the cooling water outlet pipe 15 and the one attached to the water cooling jacket 20 is the cooling water inlet pipe 26. That is, the sealing cap 11 side may be a cooling water introduction pipe, and the water cooling jacket 20 side may be a cooling water outlet pipe.

As described above, according to the water-cooled light source device according to the present invention, the sealing cap in the water-cooling mechanism and the water-cooling jacket are configured as separate structures, and these are assembled, so that the inside of the cap cap as in the conventional case. Compared with the case where the cooling water channel is configured, the overall size of the apparatus can be reduced.
In addition, since a sealing cap separate from the water-cooled jacket may be joined to the sealing portion, it can be sealed outside the sealing portion using a low melting point metal as its joining structure, and the water tightness is improved. Bonding strength is strong.

DESCRIPTION OF SYMBOLS 1 Water-cooled light source device 2 Light-emitting tube 3 Light-emitting part 4 Sealing part 5 Electrode 10 Water-cooling mechanism 11 Sealing cap 12 Joining layer 13 Metallization layer 15 Cooling water lead-out pipe 16 Connecting member 17 Cylindrical main-body part 18 Gutter part 19 Communication hole 20 Water cooling jacket 21 Cylindrical housing 22 Partition member 23 Mounting opening 25 Buffer member 26 Cooling water introduction pipe 27 Sealing ring 28 Sealing member 30 Connection fixture 31 Holding part 32 Connection part W Cooling water

Claims (5)

In a water-cooled light source device comprising a light-emitting tube composed of a light-emitting portion and a sealing portion, and a water-cooling mechanism for water-cooling the sealing portion of the light-emitting tube
The water-cooling mechanism is sealed with a low melting point metal outside the sealing portion, and extends to the inside of the sealing portion and sealed at the tip portion;
A cooling water outlet pipe extending to the inside of the sealing cap;
A water cooling jacket that is separate from the sealing cap and is fitted on the outer periphery of the sealing portion and through which the lead-out pipe penetrates;
A cooling water introduction pipe connected to the water cooling jacket,
The water-cooled light source device characterized in that the cooling water from the introduction tube flows through the outer periphery of the sealing portion, is introduced into the sealing cap, and flows out from the outlet tube.
2. The water-cooled light source device according to claim 1, wherein the water-cooling jacket is attached to the sealing portion with a sealing member interposed by a sealing ring externally mounted on the sealing portion.
The sealing cap and the water cooling jacket are attached by a connecting member, and a buffer member is provided between the connecting member and the water cooling jacket on an end surface perpendicular to the axial direction of the sealing cap. The water-cooled light source device according to claim 1 or 2.
The connection fixture which compresses these water cooling jackets to an axial direction is attached to the said water cooling jacket attached to the both ends sealing part of the said arc_tube | light_emitting_tube. The water-cooled light source device described.
5. The water-cooled type according to claim 1, wherein a metallized layer is formed on a portion where the sealing cap is sealed with a low melting point metal on the outer peripheral surface of the sealing portion. Light source device.

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