CN104810707A - Working gas circulating guiding method of fast axial flow CO2 (carbon dioxide) laser - Google Patents
Working gas circulating guiding method of fast axial flow CO2 (carbon dioxide) laser Download PDFInfo
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- CN104810707A CN104810707A CN201510261880.2A CN201510261880A CN104810707A CN 104810707 A CN104810707 A CN 104810707A CN 201510261880 A CN201510261880 A CN 201510261880A CN 104810707 A CN104810707 A CN 104810707A
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Abstract
The invention discloses a working gas circulating guiding method of a fast axial flow CO2 (carbon dioxide) laser. The working gas circulating guiding method of the fast axial flow CO2 laser comprises a first step of judging a direction; a second step of judging an angle [theta]; a third step of adopting a 45-degree bevel pipe wall at the corner of a pipeline if the angle [theta] is 90 degrees; designing the angle of a reflecting surface according to the size of the angle [theta] if the angle [theta] is not 90 degrees; a fourth step of manufacturing a side heat exchanger and the pipeline; a fifth step of carrying out mounting and connection. According to the working gas circulating guiding method of the fast axial flow CO2 laser, which is provided by the invention, by improving a driving gas circulating method of a Roots pump or a Roots blower in an existing fast axial flow CO2 laser, a corresponding scheme of the pipeline is designed according to a position relation among the original flow direction and the target flow direction of a gas and the reflecting surface, so that the energy, which is lost due to the collision in a directional movement process, of the molecules of a working gas is decreased furthest, so that the flow speed of the working gas of the fast axial flow CO2 laser in a discharge tube can be further improved effectively.
Description
Technical field
The present invention relates to a kind of gas flow guidance method, particularly a kind of axle flows CO soon
2the guidance method of laser works gas circulation.
Background technology
Axle flows CO soon
2laser is a kind of gas laser, and the laser that it sends is by exciting CO
2again to produce during low-lying level transition after gas molecule to high level, except CO in working gas
2, generally also have the assist gass such as He, N2; CO
2the electrical efficiency of laser generally can reach 20 ~ 25%, namely the electrical power of input service gas about has 20 ~ 25% can be converted into Laser output, remaining 75 ~ 80% then mainly discharges with the form of heat energy, its direct result is exactly the rapid rising of working gas temperature, and the rising of working gas temperature can weaken condition---the population inversion that laser produces, power output is reduced, until there is no power stage completely.For reducing working gas temperature, axle flows CO soon
2laser manufacturer all can adopt Roots vacuum pump or roots blower produce high velocity air and carry out cooling by heat exchanger to working gas, working gas in the discharge vessel speed generally needs to reach more than 200m/s, so just need to reduce circulation line to the resistance of working gas, particularly in the place that airflow direction changes as far as possible; The guiding scheme generally adopted in the place that airflow direction changes at present is right-angled bend guiding and circular arc turning guidance method, and inventor thinks that these two kinds of universal methods have weak point.We illustrate the deficiencies in the prior art for mutual vertical (namely 90o turns) these special circumstances of the former flow direction of gas and target flow direction below.
As shown in Figure 1, for right-angled bend guide duct schematic diagram, in figure, 9 is the amplifier section of right angle guiding 90o turning pipeline 8, we can see wherein, direction air-flow to the right runs into tube wall and is directly mirrored, obviously they can bump against with follow-up gas molecule to the right, shock herein has various ways, if the diagram 11 in Fig. 1 is to heart central collision, diagram 10 is upper and lower oblique impact, diagram 12 and diagram 13 are left and right oblique impact, the gas molecule that the result bumped against can make participation clash into is the motion of front and back all directions vertically and horizontally, wherein only having is upwards the direction of motion that we expect, it can only account at most 1/6th (this be all obliquely be all classified as upwards calculate), and remaining gas molecule can only participate in collision next time, by Thermodynamics & Statistical Physics principle, even if do not consider that the impact of molecular thermalmotion is (for distinguish with molecular thermalmotion, we call the directed movement of gas the motion that speed above-mentioned is 200m/s), only calculate by macroscopical directed movement, each gas molecule on average at least collides and is not less than six ability acquisitions direction of motion upwards, someone can say that these collisions only have just can make gas gross energy have loss with the collision of chamber wall, but according to the crash analysis between real gas molecule, collision between gas molecule can make the kinetic energy of the random motion of gas molecule increase, namely the kinetic energy of warm-up movement increases, so gas temperature can raise because of the increase of collision frequency, and simultaneously the directed movement kinetic energy of gas molecule reduces, namely the speed of the directed movement of gas molecule reduces, this is also the result of the conservation of energy, certainly, the directed movement kinetic energy lost with the collision of chamber wall also can become the heat energy of gas molecule and wall molecule, in a word, no matter be collide the collision between wall or gas molecule, collision frequency is more, and the energy of the directed movement of gas molecule just reduces more, and the speed of the directed movement of gas molecule is less, and this is obviously unfavorable for that improving axle flows CO soon
2laser works gas speed in the discharge vessel.CO is flowed soon from being conducive to improving axle
2this target of laser works gas speed is in the discharge vessel set out, and we just should reduce the collision frequency in working gas molecular orientation motion process as far as possible.
As shown in Figure 2, for circular arc turning guide duct schematic diagram, in figure, 15 is the amplifier section of circular arc guiding 90o turning pipeline 14, we can see wherein, after direction air-flow to the right runs into the reflection of circular arc tube wall, its direction is (gas molecule wherein only in pipeline axle center may be just vertically upward after reflection) obliquely upward, this makes great progress compared with right-angled bend, but the gas molecule of these oblique tops flows to not parallel, the various collisions of some must be had like this between them in directed movement process, even if there is the gas molecule touched individually less than other gas molecule also finally will encounter tube wall, although compare right-angled bend collision frequency to reduce to some extent, still have the leeway of lifting.
Summary of the invention
For above problem, the present invention is that a kind of axle flows CO soon
2laser works gas circulation guidance method, this guidance method is by flowing CO soon to existing axle
2in laser, lobe pump or roots blower driving gas round-robin method are improved, according to the former flow direction of gas, position relationship between target flow direction and reflecting surface, design corresponding pipeline solution, the energy that working gas molecule is lost because of the collision in directed movement process drops to minimum, and then can effectively improve axle and flow CO soon
2laser works gas flow velocity in the discharge vessel, for reaching this object, the invention provides a kind of axle and flowing CO soon
2laser works gas circulation guidance method, concrete guidance method is as follows:
The first step, judge that axle flows CO soon
2the former flow direction of working gas of the pipeline be connected with lobe pump or roots blower in laser and working gas target flow direction;
Second step, judge angle θ between the former flow direction of working gas and working gas target flow direction;
If angle θ is 90 ° between the former flow direction of the 3rd step working gas and working gas target flow direction, tubing corner place is adopted 45 ° of inclined-plane tube walls;
If angle θ is not 90 ° between the former flow direction of working gas and working gas target flow direction, design reflectivity face, according to the former flow direction of working gas and working gas target flow direction and reflector situation, ensure that the former flow direction of working gas could flow out along target flow direction after reflective surface, adopt corresponding reflecting face to design at tubing corner place;
4th step, after pipe design completes, makes high-pressure side heat exchanger and pipeline and low-pressure side heat exchanger and pipeline;
5th step, by high-pressure side heat exchanger and pipeline, the lobe pump of discharge tube and lobe pump or roots blower or roots blower air outlet to be connected, by low-pressure side heat exchanger and pipeline, the lobe pump of discharge tube and lobe pump or roots blower or roots blower air inlet to be connected.
Improve further as the present invention, the conducting cross section that conducting cross section that is consistent with non-guide place or described reflecting surface place, the conducting cross section at described reflecting surface place is greater than non-guide place or described reflecting surface place is less than non-guide place, and the present invention can design the conducting cross section at conducting cross section and non-guide place according to actual conditions.
The present invention is as shown in Fig. 3 slant reflection guide duct schematic diagram, in figure, 17 is the amplifier section of 45o slant reflection guiding 90o turning pipeline 16, we can see wherein, direction air-flow to the right run into 45o inclined-plane tube wall 18 reflect after its direction be upwards, these gas molecules upwards flow to parallel, and it is parallel with duct wall upwards, like this in directed movement process between them and they and duct wall do not collide in theory, namely only have the direction just achieving directed movement with the primary collision of 45o inclined-plane tube wall 18 to change at turning, energy that such working gas molecule loses because of the collision in directed movement process just drops to minimum, this can effectively improve axle and flow CO soon
2laser works gas flow velocity in the discharge vessel.
Except above we solve the former flow direction of gas and target flow direction is orthogonal special circumstances, for ordinary circumstance, namely the former flow direction of gas and target flow direction are not orthogonal, but have a certain degree, as shown in Figure 4, the former flow direction of working gas 22 is into θ angle with target flow direction 23, dotted line 20 is the angular bisector at θ angle, diagram 21 is reflecting surface, known by plane geometry knowledge, only have when the angular bisector 20 of reflecting surface 21 perpendicular to θ angle that (reflecting surface 21 all becomes (90o-QUOTE with the former flow direction 22 of working gas with target flow direction 23
θ) angle), the former flow direction 22 of working gas could flow out along target flow direction 23 after reflecting surface 21 reflects, after being aware of the former flow direction 22 of gas, position relationship between target flow direction 23 and reflecting surface 21, just required guide duct can be designed, if the design in Fig. 4 is exactly wherein a kind of design, the conducting cross section that this design maintains guiding reflecting surface place is consistent with non-guide place, certainly we are also greater than the scheme at non-guide place in the conducting cross section can according to circumstances designed in Fig. 4 shown in Figure 24, also can design the scheme counted out in Fig. 4 and illustrate the conducting cross section shown in 25 and be less than non-guide place.
Accompanying drawing explanation
Fig. 1 right-angled bend guide duct 90o turning schematic diagram;
Fig. 2 circular arc turning guide duct 90o turning schematic diagram;
Fig. 3 slant reflection guide duct 90o turning schematic diagram;
Fig. 4 slant reflection guide duct θ angle turning schematic diagram;
Concrete component names is as follows:
1, lobe pump or roots blower; 2, lobe pump or roots blower air outlet;
3, high-pressure side heat exchanger and pipeline; 4, discharge tube;
5, low-pressure side heat exchanger and pipeline; 6, lobe pump or roots blower air inlet;
7, the desirable flow line of gas; 8, right angle guiding 90o turning pipeline;
9, right angle guide turning pipeline enlarged fragmentary portion; 10, the upper and lower oblique impact part of gas molecule;
11, gas molecule is to heart central collision part; 12, a kind of form left and right oblique impact part of gas molecule;
13, the another kind of form left and right oblique impact part of gas molecule; 14, circular arc guiding 90o turning pipeline;
15, circular arc guide turning pipeline enlarged fragmentary portion; 16,45o slant reflection guiding 90o turning pipeline;
17, slant reflection turning pipeline enlarged fragmentary portion; 18,45o slant reflection face;
19, the guiding scheme that reflection place cross section is constant; 20, θ angle angular bisector;
21, reflecting surface; 22, the former flow direction of working gas;
23, working gas target flow direction; 24, reflection place cross section becomes large guiding scheme;
25, the guiding scheme that diminishes of reflection place cross section.
Embodiment
Below in conjunction with drawings and Examples, invention is described in detail:
The present invention is that a kind of axle flows CO soon
2laser works gas circulation guidance method, this guidance method is by flowing CO soon to existing axle
2in laser, lobe pump or roots blower driving gas round-robin method are improved, according to the former flow direction of gas, position relationship between target flow direction and reflecting surface, design corresponding pipeline solution, the energy that working gas molecule is lost because of the collision in directed movement process drops to minimum, and then can effectively improve axle and flow CO soon
2laser works gas flow velocity in the discharge vessel.
As an embodiment of the present invention, a kind of axle flows CO soon
2laser works gas circulation guidance method, is characterized in that: concrete guidance method is as follows:
The first step, judge that axle flows CO soon
2the former flow direction 22 of working gas of the pipeline be connected with lobe pump or roots blower 1 in laser and working gas target flow direction 23;
Second step, judge angle θ between the former flow direction 22 of working gas and working gas target flow direction 23;
If angle θ is 90 ° between the former flow direction 22 of the 3rd step working gas and working gas target flow direction 23, tubing corner place is adopted 45 ° of inclined-plane tube walls 18;
If angle θ is not 90 ° between the former flow direction 22 of working gas and working gas target flow direction 23, design reflectivity face 21, according to the former flow direction 22 of working gas and working gas target flow direction 23 and reflecting surface 21 situation, ensure that the former flow direction 22 of working gas could flow out along target flow direction 23 after reflecting surface 21 reflects, (namely reflecting surface 21 all becomes (90o-QUOTE with the former flow direction 22 of working gas with target flow direction 23 tubing corner place to be adopted corresponding reflecting surface 21 angle
θ) angle) design;
4th step, after pipe design completes, makes high-pressure side heat exchanger and pipeline 3 and low-pressure side heat exchanger and pipeline 5;
5th step, by high-pressure side heat exchanger and pipeline 3, the lobe pump of discharge tube 4 and lobe pump or roots blower 1 or roots blower air outlet 2 to be connected, by low-pressure side heat exchanger and pipeline 5, the lobe pump of discharge tube 4 and lobe pump or roots blower 1 or roots blower air inlet 6 to be connected.
In shaping-orientation mode process as Fig. 4 in diagram 19 shown in, the conducting cross section of described reflecting surface is consistent with non-guide place, as illustrated shown in 24 in Fig. 4, the conducting cross section of described reflecting surface is greater than non-guide place, as illustrated shown in 25 in Fig. 4, the conducting cross section of described reflecting surface is less than non-guide place, and the present invention can according to the size in conducting cross section, actual conditions design reflectivity face place.
The above is only preferred embodiment of the present invention, is not restriction the present invention being made to any other form, and any amendment done according to technical spirit of the present invention or equivalent variations, still belong to the present invention's scope required for protection.
Claims (4)
1. an axle flows CO soon
2laser works gas circulation guidance method, is characterized in that: concrete guidance method is as follows:
The first step, judge that axle flows CO soon
2the former flow direction of working gas (22) of the pipeline be connected with lobe pump or roots blower (1) in laser and working gas target flow direction (23);
Second step, judge angle θ between the former flow direction of working gas (22) and working gas target flow direction (23);
If angle θ is 90 ° between the former flow direction of the 3rd step working gas (22) and working gas target flow direction (23), tubing corner place is adopted 45 ° of inclined-plane tube walls (18);
If angle θ is not 90 ° between the former flow direction of working gas (22) and working gas target flow direction (23), design reflectivity face (21), according to the former flow direction of working gas (22) and working gas target flow direction (23) and reflecting surface (21) situation, ensure that the former flow direction of working gas (22) could flow out along target flow direction (23) after reflecting surface (21) reflection, tubing corner place is adopted corresponding reflecting surface (21) angle design, namely reflecting surface (21) all becomes (90o-QUOTE with the former flow direction of working gas (22) with target flow direction (23)
θ) angle,
4th step, after pipe design completes, makes high-pressure side heat exchanger and pipeline (3) and low-pressure side heat exchanger and pipeline (5);
5th step, by high-pressure side heat exchanger and pipeline (3), the lobe pump of discharge tube (4) and lobe pump or roots blower (1) or roots blower air outlet (2) to be connected, by low-pressure side heat exchanger and pipeline (5), the lobe pump of discharge tube (4) and lobe pump or roots blower (1) or roots blower air inlet (6) to be connected.
2. a kind of axle according to claim 1 flows CO soon
2laser works gas circulation guidance method, is characterized in that: the conducting cross section of described reflecting surface (21) is consistent with non-guide place.
3. a kind of axle according to claim 1 flows CO soon
2laser works gas circulation guidance method, is characterized in that: the conducting cross section of described reflecting surface (21) is greater than non-guide place.
4. a kind of axle according to claim 1 flows CO soon
2laser works gas circulation guidance method, is characterized in that: the conducting cross section of described reflecting surface (21) is less than non-guide place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510261880.2A CN104810707A (en) | 2015-05-21 | 2015-05-21 | Working gas circulating guiding method of fast axial flow CO2 (carbon dioxide) laser |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510261880.2A CN104810707A (en) | 2015-05-21 | 2015-05-21 | Working gas circulating guiding method of fast axial flow CO2 (carbon dioxide) laser |
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|---|---|
| CN104810707A true CN104810707A (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510261880.2A Pending CN104810707A (en) | 2015-05-21 | 2015-05-21 | Working gas circulating guiding method of fast axial flow CO2 (carbon dioxide) laser |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573162A (en) * | 1983-07-02 | 1986-02-25 | Messer Griesheim Gmbh | Gas laser, particularly fast axial flow gas transport laser |
| GB2219889A (en) * | 1985-12-19 | 1989-12-20 | Spectra Physics | "fast axial flow laser circulating system" |
| CN2654562Y (en) * | 2003-09-16 | 2004-11-10 | 齐善成 | Multiturning elbow for delivering fast speed liquid |
| EP2196719A2 (en) * | 2008-12-12 | 2010-06-16 | BSH Bosch und Siemens Hausgeräte GmbH | Flow-optimised pipe elbow |
| CN104103998A (en) * | 2013-04-15 | 2014-10-15 | 北京开天科技有限公司 | Electrode block and fast axial flow laser |
-
2015
- 2015-05-21 CN CN201510261880.2A patent/CN104810707A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4573162A (en) * | 1983-07-02 | 1986-02-25 | Messer Griesheim Gmbh | Gas laser, particularly fast axial flow gas transport laser |
| GB2219889A (en) * | 1985-12-19 | 1989-12-20 | Spectra Physics | "fast axial flow laser circulating system" |
| CN2654562Y (en) * | 2003-09-16 | 2004-11-10 | 齐善成 | Multiturning elbow for delivering fast speed liquid |
| EP2196719A2 (en) * | 2008-12-12 | 2010-06-16 | BSH Bosch und Siemens Hausgeräte GmbH | Flow-optimised pipe elbow |
| CN104103998A (en) * | 2013-04-15 | 2014-10-15 | 北京开天科技有限公司 | Electrode block and fast axial flow laser |
Non-Patent Citations (2)
| Title |
|---|
| 崔静等: "高功率轴快流CO2激光器气体循环系统的研究进展", 《应用激光》 * |
| 左都罗等: "快轴流CO2激光器评述", 《激光技术》 * |
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Application publication date: 20150729 |
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