CN1215618C - Tube-sheet type discharge electrode of wide-strip anode - Google Patents
Tube-sheet type discharge electrode of wide-strip anode Download PDFInfo
- Publication number
- CN1215618C CN1215618C CN 03129603 CN03129603A CN1215618C CN 1215618 C CN1215618 C CN 1215618C CN 03129603 CN03129603 CN 03129603 CN 03129603 A CN03129603 A CN 03129603A CN 1215618 C CN1215618 C CN 1215618C
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- Prior art keywords
- anode
- tube
- discharge
- wide
- cathode tube
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- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 abstract description 3
- 230000004913 activation Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 1
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Abstract
A tube-plate discharge electrode with wide anode is composed of wide anode blocks arranged along cathode tubes, and a group of needles arranged at the upstream of cathode above anode blocks for pre-discharge between them. The electrode structure can effectively increase the discharge length in the laser cavity, improve the uniformity and stability of discharge and increase the power density of body discharge. Die selection CO particularly suitable for cutting and welding2The laser can fully utilize the activation volume and improve photoelectric conversionAnd (4) changing efficiency.
Description
Technical field
The present invention is relevant with crossing current discharge-type gas laser, particularly a kind of crossing current CO that is applicable to cutting, welding usefulness
2The tube-sheet type sparking electrode of wide anode of laser.
Background technology
Crossing current gas CO
2Direct current gas discharge electrode structure in the laser generally adopts needle plate electrode structure and tube sheet electrode structure, and is fairly simple, practical.Present tube sheet electrode structure, see that accompanying drawing 1 is described, cathode tube 2 places the top of anode block 1, the upstream position of air-flow, at the bottom of cathode tube 2 arranged upstream one discharging acusector 3, every at answering an anode block, and anode block is rectangular flat metal piece along airflow direction, anode block 1 rearranges anode along negative electrode 2 direction arrays, and spacing is d between the anode block 1.There is following shortcoming in this tube-sheet type electrode structure:
1, in limited chamber is long, because the large percentage that the ratio of anode block 1 spacing d and anode block width accounts for, actual effectively discharge length utilance is lower, has limited the output of laser power.
2, plate electrode discharge uniformity depends on that preionization distributes, owing to be the most advanced and sophisticated pre-arcing of single needle, adds that anode block at interval, is very big at anode surface along discharge current density skewness on the cathode direction.
3, in the electric current distribution inequality, along with injecting electric power increases, discharge is easy to carry out the transition to arc light, has limited the increase of operating air pressure and body electrical power density.
4, be rectangular in anode block along airflow direction, cause along airflow direction discharge cross section greatlyyer that this mode volume utilance for the modeling laser is too low.
Summary of the invention
Order CO of the present invention
2The tube-sheet type sparking electrode that provides a kind of wide anode, with the cross-flow laser that is applicable to that China produces, improve in the chamber the effectively injecting electric power of discharge length and unit volume, improve medium gain in the chamber, improvement discharge uniformity and stability.
Technical solution of the present invention is as follows:
A kind of tube-sheet type sparking electrode of wide anode, formed by anode, water-cooled cathode tube and pre-arcing pin group, described anode is to be arranged along the cathode tube direction by some metal anode pieces to form, and be parallel to cathode tube, the spacing between the anode block is d, in the upstream of cathode tube, be arranged with pre-arcing pin group corresponding to anode block, the long limit that it is characterized in that described anode block is parallel to cathode tube, and minor face is along airflow direction, and anode block cools off indirectly by water cooling tube.
The metal needle of described pre-arcing pin group is positioned at air-flow updrift side, suitable anode block length direction, uniformly-spaced arrangement and tangent with the bottom surface of cathode tube, and the spacing of metal needle is 8-10mm.
The tube-sheet type sparking electrode of wide anode of the present invention is through probationary certificate: be specially adapted to the cutting welding with crossing current CO
2Laser can make full use of mode volume and region of discharge coupling, can improve electro-optical efficiency.
Description of drawings:
Fig. 1 is the tube-sheet type discharge electrode structure schematic diagram of prior art.
Fig. 2 is the tube-sheet type discharge electrode structure schematic diagram of wide anode of the present invention.
Fig. 3 is the circuit diagram of the tube-sheet type sparking electrode of wide anode of the present invention.
Embodiment
See also Fig. 2 and Fig. 3 earlier, the tube-sheet type sparking electrode of wide anode of the present invention is that wide anode block array 1, water-cooled cathode tube 2 and row's pre-arcing pin group 3 are formed.
Described anode 1 is to be rearranged along cathode direction by some wide anode blocks 11, and anode block 11 spacings are d.Each anode block 11 is rectangular planar metal pieces, and its long limit is parallel to cathode tube 2, and minor face is consistent with airflow direction, is cooled off indirectly by water cooling tube 4 at anode block 11 back sides.
The length on described anode block 11 long limits in principle can be very long.But because the gas negative resistance charactertistic, the steady glow discharge of anode block need seal in a current-limiting resistance, and current-limiting resistance power is
P＝(σ
a×l×w)
2?R
σ in the formula
aBe anode block 11 glow discharge maximum current density (A/cm
2), l and w are respectively the length and the width of anode block 11, and R is current-limiting resistance resistance (Ω).Therefore anode block 11 length need suitably to select.
Described cathode tube 2 is metal tubes of water flowing cooling, and it is positioned at the top of anode, the upstream position of air-flow and be parallel to anode.
Described pre-arcing pin group 3 is to be arranged along cathode tube 2 by row's metal needle 31 to form, and its position is tangent in the upstream and cathode tube 2 bottoms of cathode tube 2, and needle point is d from the cathode tube distance
pThe corresponding anode block of pre-arcing pin 31 11 is uniform, pin close help discharging uniformity and stability, and its spacing is generally got 8～10mm for well.
The tube sheet electrode structure of the present invention and prior art relatively has following advantage:
1, in identical electrode length, effective discharge length of the present invention (gain length)---slightly refer to the length on anode block surface on cathode direction, obtain bigger raising, the increase multiple is
n＝(l
1+d)l/(l+d)l
1
Here l is an anode block length of the present invention, l
1For primary electrode structure anode block along cathode direction length, d be anode block at interval.
2, owing to the strong preionization of spininess, the discharge uniformity on positive plate obtains to improve, and along with discharging current increases, discharge can be full of whole anode surface, and the input electric power density under the steady glow discharge also significantly improves.
3, anode width can be determined according to the laser needs, and as basic mode vibration or low-order mode vibration, anode width is a bit larger tham spot size, and the fine coupling of region of discharge and mode volume improves photoelectric conversion efficiency like this.
The present invention is at the HJ CO that flows over
2Test on the laser, concrete parameter is as follows:
Brass anode block 11 is of a size of 40 * 20mm, and spacing is 4mm, amounts to 25, and cathode tube 2 diameters are φ 8mm water-cooled copper, and cathode bottom is 20mm to the anode height, every anode block correspondence pre-arcing pin 31 totally 4, pin and pin spacing 10mm.In laser, charge into the CO of 80 * 133.3Pa
2+ N
2+ He mist, gas ratio are CO
2: N
2: He=1: 8: 11, the gas flow rate that flows through region of discharge was that 30～50M/S is adjustable.Flow through the electric current average out to 300mA of every anode block, maximum discharge current density can reach 38mA/cm
2, be 2 times of former tube sheet electrode.We have also carried out laser test, and effect is fine.
Claims (2)
1, a kind of tube-sheet type sparking electrode of wide anode, by anode (1), water-cooled cathode tube (2) and pre-arcing pin group (3) are formed, described anode (1) is to be arranged along cathode tube (2) direction by some metal anode pieces (11) to form, and be parallel to cathode tube (2), spacing between the anode block (11) is d, upstream in cathode tube (2), be arranged with pre-arcing pin group (3) corresponding to anode block, the long limit that it is characterized in that described anode block (11) is parallel to cathode tube (2), and minor face is along airflow direction, and anode block (11) is by water cooling tube (4) cooling indirectly.
2, according to tube-sheet type sparking electrode according to described wide the anode of claim 1, the metal needle (31) that it is characterized in that described pre-arcing pin group (3.) is positioned at air-flow updrift side, suitable anode block (11) length direction, equidistantly arrangement and tangent with the bottom surface of cathode tube (2), and the spacing of metal needle is 8-10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03129603 CN1215618C (en) | 2003-06-27 | 2003-06-27 | Tube-sheet type discharge electrode of wide-strip anode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03129603 CN1215618C (en) | 2003-06-27 | 2003-06-27 | Tube-sheet type discharge electrode of wide-strip anode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1477737A CN1477737A (en) | 2004-02-25 |
| CN1215618C true CN1215618C (en) | 2005-08-17 |
Family
ID=34153607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03129603 Expired - Fee Related CN1215618C (en) | 2003-06-27 | 2003-06-27 | Tube-sheet type discharge electrode of wide-strip anode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1215618C (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100341210C (en) * | 2005-02-23 | 2007-10-03 | 中国科学院上海光学精密机械研究所 | High efficiency low order mode cross flow CO2Laser device |
| CN112739837A (en) * | 2018-09-20 | 2021-04-30 | 西默有限公司 | Long-life laser cavity electrode and laser with same |
-
2003
- 2003-06-27 CN CN 03129603 patent/CN1215618C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1477737A (en) | 2004-02-25 |
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Owner name: SHANGHAI OPTICS AND PRECISION MECHANICS INSTITUTE Free format text: FORMER OWNER: SHANGHAI OPTICS AND PRECISION MECHANICS INSTITUTE, CHINESE ACADEMY OF SCIENCES Effective date: 20080912 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080912 Address after: Shanghai city 800211 postal zip code: 201800 Co-patentee after: Shanghai Zhong Zhong Ou laser equipment Co., Ltd. Patentee after: Shanghai Institute of Optics and Fine Mechanics.CAS, Chinese Academy of Sciences Address before: Shanghai city 800211 postal zip code: 201800 Patentee before: Shanghai Optical Precision Machinery Inst., Chinese Academy of Sciences |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050817 Termination date: 20130627 |