CN2894003Y - Air cold cathode insulation box for gas laser and laser thereof - Google Patents
Air cold cathode insulation box for gas laser and laser thereof Download PDFInfo
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- CN2894003Y CN2894003Y CN 200620095797 CN200620095797U CN2894003Y CN 2894003 Y CN2894003 Y CN 2894003Y CN 200620095797 CN200620095797 CN 200620095797 CN 200620095797 U CN200620095797 U CN 200620095797U CN 2894003 Y CN2894003 Y CN 2894003Y
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Abstract
An air-cooled cathode insulation box and laser of a gas laser comprises a casing, a blower, a heat exchanger, a circular cavity, an electrode, an operation airflow, a reflector and an output mirror, wherein the overall circular cavity of the laser has several sections where inlet interval channels of all sections are distributed on the circumference of the circular cavity in stagger form, the central line of interval channel of inlet in circular cavity is not intersected with the cavity shaft, the central line of the interval channel of the outlet in the circular cavity turns one degree for the central line of the interval channel of the inlet, which is characterized in that: the cathode of the laser has multiple air-cooled cathode insulation box, the cathode piece and the metal radiator in the air-cooled insulation box are installed together to form a cathode unit, the head of piece is exposed on the radiator, the air-cooled interval channel is arranged in the radiator mounted in the insulation box, and the lifetime of the air-cooled cathode exceeds 15000 hours.
Description
Technical field
The utility model belongs to gas stream ejector half laser, particularly carbon dioxide laser.
Background technology
Laser has multiple use, and laser processing is one of its important use.Laser processing is meant and utilizes laser cutting, welding, heat treatment, boring and mark etc. that wherein laser cutting accounts for more than 70%.Laser cutting, particularly multidimensional precise laser cutting needs the quality of light beam good, the circular laser beam that promptly diameter is little, the angle of divergence is little, power shaft is symmetrically distributed.The carbon dioxide laser that now is used for laser processing both at home and abroad, mainly be crossing current, axial flow and the diffusion cooling laser device that occurs in recent years, the gain profiles of crossflow CO 2 laser is not axisymmetric, though adopt many foldings chamber can obtain the little laser beam of the angle of divergence, the distribute power of light beam is not complete axial symmetry.Therefore it is mainly used in heat treatment and welding.The gain profiles that the glass tubular axis flows carbon dioxide laser soon is axisymmetric, and the angle of divergence of light beam is little, and distribute power also is axisymmetric.Therefore it is widely used in laser cutting.But it needs Lodz system or turbofan, and volume is big, cost is high.Diffusion cooled carbon dioxide laser.Volume is very little, and light beam is not that circle has certain ovality, and power is not that axial symmetry distributes.
On core technology, has China's independent intellectual property right in order to research and develop, be mainly used in the carbon dioxide laser of cutting, I proposed eddy flow (Helical flow) laser (Chinese invention patent 98113603.6) in 98 years, the intracavity gas of this laser flows and is three-dimensional spiral shape, the volume of its laser reduces greatly, improved the hot spot uniformity of gas laser and the quality of light beam, and manufacturing expense has reduced on the contrary.This laser volume is little, cost is low, can obtain the high-quality laser beam of hectowatt grade to the myriawatt level.
2003, I have further improved the structure of gas laser again on the basis of eddy flow (Helical flow) laser scheme, turn of tidal stream (Rotation flow) laser (Chinese invention patent 2003125325.3) is proposed, the intracavity gas of this laser flows and is the two dimension rotation, make laser on the basis that volume reduces greatly, its inner structure to simplify, is convenient to the batch machining manufacturing again.
But circular metal cavity turn of tidal stream laser (Chinese invention patent 2003125325.3) still has the place that requires further improvement though it has the high-quality laser beam.1, the life-span of its negative electrode is less than 10000 hours, and this is that it is bad to dispel the heat because negative electrode is that needle-like metal is inserted on the insulated ceramic plates, and negative electrode long term high temperature working life is shorter; 2, the laser overall volume also will reduce, but because the air-flow rotation direction of its each section is identical, thereby whole volume is still bigger, and if volume can be compact again, the materials of laser also can reduce, these promotion and application for product have very big benefit.
Summary of the invention
The purpose of this utility model is further to improve the structure of two-dimentional turn of tidal stream (Rotation flow) laser, propose a kind of cooling cathode insulation box of gas and laser thereof of improved gas laser, improve useful life, improve luminous efficiency, further reduced volume is saved material and processing charges.
The technical solution of the utility model is: the cooling cathode insulation box of gas of gas laser is characterized in that: cathode sheets and heat dissipation metal body are fitted together the formation cathode electrode unit, and head are exposed at outside the radiator, and the cold air runner is arranged in the radiator, and radiator is contained in the insulation booth.
Aforesaid cooling cathode insulation box of gas is characterized in that: the material of insulation booth is pottery or crystallite.
Aforesaid cooling cathode insulation box of gas is characterized in that: several little lattice are arranged in the insulation booth, adorn a cathode electrode unit in each little lattice.
Circular metal cavity turn of tidal stream laser, it has casing, blower fan, heat exchanger, cylindrical cavity, electrode, working air current, speculum, outgoing mirror, the whole cylindrical cavity of laser is divided into plurality of sections, the entrance channel of each section is dislocatedly distributed on the circumference of cylindrical cavity, the entrance channel center line of cylindrical cavity does not intersect with the chamber axle, the outlet flow center line of cylindrical cavity is with respect to angle of entrance channel center line deflection, it is characterized in that: the negative electrode of laser has a plurality of cooling cathode insulation box of gas, cathode sheets in the cooling cathode insulation box of gas and heat dissipation metal body are fitted together the formation cathode electrode unit, head are exposed at outside the radiator, the cold air runner is arranged in the radiator, and radiator is contained in the insulation booth.
Aforesaid circular metal cavity turn of tidal stream laser is characterized in that: the material of insulation booth is pottery or crystallite.
Aforesaid circular metal cavity turn of tidal stream laser is characterized in that: several little lattice are arranged in the insulation booth, adorn a cathode electrode unit in each little lattice.
Aforesaid circular metal cavity turn of tidal stream laser, it is characterized in that: the working air current direction in each section of cylindrical cavity is respectively clockwise and is counterclockwise, the blower fan outlet is positioned in the middle of the casing, the working air current of each section of cylindrical cavity entrance channel flows to identical, the cathode electrode unit of clockwise section is positioned at the right of clockwise section entrance channel in the cylindrical cavity, and the cathode electrode unit of section is positioned at the left side of counterclockwise section entrance channel counterclockwise.
Aforesaid circular metal cavity turn of tidal stream laser is characterized in that: it is characterized in that the diameter of the width of cylindrical cavity entrance channel less than cylindrical cavity.
Aforesaid circular metal cavity turn of tidal stream laser is characterized in that: the water-cooled sheet is housed on the motor casing of described blower fan, on the water-cooled sheet water cooling tube is housed.
The utlity model has following advantage:
1, the good heat dissipation of cathode electrode unit, long service life has improved the luminous efficiency of laser.Existing needle-like negative electrode heat radiation is bad, and the negative electrode long term high temperature life-span was shorter, less than 10000 hours; Negative electrode of the present utility model is a sheet, is furnished with heat dissipation metal body (as copper, aluminium, or its alloy etc.) again, and the runner in the radiator is connected with refrigerating gas, and its heat conduction, thermal diffusivity improve greatly, can reach useful life more than 15000 hours; The temperature of working gas reduces the luminous efficiency that can improve laser.
2, laser integral body is more compact, and beam quality is still fine.The outlet of employing blower fan is positioned at the intermediate structure of casing, and the whole discharge length of laser cavity is divided into several sections, the outlet flow inclined left of half, second half outlet flow inclined right, two-part air-flow is respectively clockwise and is counterclockwise, make the interior gain profiles of whole discharge length epicoele even, reach the purpose that improves beam quality; And the working air current of each section of cylindrical cavity entrance channel flows to identical, the cathode electrode unit of clockwise section is positioned at the right of clockwise section entrance channel in the cylindrical cavity, the cathode electrode unit of section is positioned at the left side of counterclockwise section entrance channel counterclockwise, and each section working air current flow velocity is even, and the laser overall structure is more compact.
Description of drawings
Fig. 1 is the utility model laser embodiment structural representation of section (section 1) clockwise.Wherein, cylindrical cavity 1, anode 2, water-cooled runner 3, cathode sheets 4, cold air runner 5, copper core 6, ceramic box 7, heat exchanger 8, air deflector 9, blower fan 10, casing 11, entrance channel 12, outlet flow 13.Arrow is represented airflow direction.
Fig. 2 is the utility model laser embodiment section (section 2) structural representation counterclockwise.
Fig. 3 is the structural representation of the utility model gas-cooled cathode ceramic box embodiment.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the working air current rotation direction figure of the utility model laser embodiment.Wherein, Fig. 5 a is that each section rotation direction is identical, and Fig. 5 b is each section rotation direction difference; F1, F2 airflow direction.
Fig. 6, Fig. 7 are the utility model laser fan electromotor water-cooled schematic diagrames.Wherein, screw hole 14, copper pipe 15, copper coin 16, motor stator 17, screw 18, water 19.
Concrete execution mode
Referring to Fig. 3, be the cooling cathode insulation box of gas embodiment of gas laser of the present utility model, it has cathode electrode unit and insulation booth, it is characterized in that: cathode sheets 4 is fitted together the formation cathode electrode unit with heat dissipation metal body copper core 6, head are exposed at outside the copper core 6, cold air runner 5 is arranged in the copper core 6, and copper core 6 is contained in the ceramic box 7.
The material of cathode sheets has the tungsten sheet, molybdenum sheet, or their alloy; Radiator has copper, aluminium, or their alloy; Box body has insulators such as pottery, crystallite; The heat radiation fluid is a gas.
In the present embodiment, cathode sheets 4 is a sheet tungsten sheet, and lamellar body is embedded in the copper core 6 (also can be pressed in the surface of copper core 6), and head are exposed at outside the copper core 6, and cold air runner 5 is arranged in the copper core 6, and copper core 6 is contained in the little cell of ceramic box 7.Cathode sheets 4 is the discharge generation heat when laser works, and the heat on the negative electrode tungsten sheet is passed to copper core 6 with the contact-making surface of sheet, is most ofly then taken away from copper core 6 by the cold air in the cold air runner 5, has only small part to distribute from the head of cathode sheets 4 and enters cylindrical cavity.Cathode sheets 4 is embedded in the copper core 6, contact-making surface is bigger than traditional pin, and heat transfer will be got well a lot, adds to feed heat radiation gas, the heat dissipating state of cathode electrode unit is greatly improved, and the life-span of negative electrode can be of the present utility model more than 15000 hours from bringing up to less than 10000 hours of needle-like.Cooling cathode insulation box of gas of the present utility model is applicable to carbon dioxide and CO (carbon monoxide converter) laser eddy flow, crossing current.
The circular metal cavity turn of tidal stream laser embodiment that uses cooling cathode insulation box of gas of the present utility model as shown in Figure 1 and Figure 2.
It has casing 11, blower fan 10, heat exchanger 8, cylindrical cavity 1, anode 2, working air current, speculum, outgoing mirror, the whole cylindrical cavity of laser is divided into two sections, two sections entrance channel is dislocatedly distributed on the circumference of cylindrical cavity, the entrance channel center line of cylindrical cavity does not intersect with the chamber axle, the outlet flow center line of cylindrical cavity is with respect to angle of entrance channel center line deflection, it is characterized in that: the cooling cathode insulation box of gas of laser is by cathode sheets 4, copper core 6 and ceramic box 7 constitute, cathode sheets 4 is a sheet, lamellar body is embedded in the copper core 6, head are exposed at outside the copper core 6, cold air runner 5 is arranged in the copper core 6, and copper core 6 is connected on the ceramic box 7.
When the working air current in the cylindrical cavity 1 is the rotation direction shown in Fig. 5 a when identical (turning clockwise), the inlet air flow F1 of section 1 from bottom to top, more from the top down, the entrance channel of section 1 is up; Section 2 inlet air flow F2 from bottom to top, the entrance channel of section 2 below.Inlet air flow F1 manys turning round of two 90 degree than F2, has influenced the flow velocity of F1, makes gain inhomogeneous, and luminous efficiency descends.
Two sections rotation direction difference among the utility model embodiment is seen Fig. 5 b (F1 is counterclockwise, and F2 is clockwise).Section 1 inlet air flow F1 from bottom to top, the entrance channel of section 1 below; Section 2 inlet air flow F2 also is from bottom to top, the entrance channel of section 2 also below; Flowing to of two sections working air current is identical.Below F1, F2 coexist, its flow velocity equalization, gain is even, and luminous efficiency improves; The structure of laser is also compact, and materials are greatly saved, and helps reducing cost.
All arrows are represented airflow direction among the figure.Air-flow is produced by blower fan 10, enters cylindrical cavity 1 through air deflector 9.Carry heat,, circulate, make cavity temperature stable by getting back to blower fan 10 behind the heat exchanger 8 because of discharge generation in the chamber.
In order to improve the stability of laser works, water-cooled sheet 16 is installed on the shell of fan electromotor, cold water pipe 15 is housed on the water-cooled sheet, feed cold water and cool off.Its structure as shown in Figure 6 and Figure 7.
The circular metal cavity turn of tidal stream laser of the utility model embodiment has following feature:
1, the chamber wall is a metal, helps heat radiation cooling in the chamber.
2, cavity is circular, helps the uniformity of interacvity gain circular distribution.
3, adopt the center line of cylindrical cavity entrance channel not intersect with the chamber axle, the cylindrical cavity outlet flow is its entrance channel deflection certain angle relatively, makes air-flow at chamber intrinsic deflection certain angle, forms turn of tidal stream, to improve the uniformity of interacvity gain circle distribution.
4, the outlet of employing blower fan is positioned at the centre of casing, and whole discharge length is divided into two sections, one section outlet flow inclined left, the outlet flow inclined right of another section, two sections air-flow is respectively clockwise and is counterclockwise, improve the uniformity of gain profiles in the whole discharge length epicoele, reach the purpose that improves beam quality.
5, adopt the gas-cooled cathode ceramic box, reduce the negative electrode working temperature, improve cathode life.Reduce temperature rise in the chamber of improving simultaneously because of the negative electrode heating.Each ceramic box has the cathode electrode unit of several mutually insulateds, and each cathode electrode unit is made up of sheet hot metal electrode and copper core, and each copper core has the cold air runner.
6, in order to prevent to cause the pollution of gain media because of the fan electromotor coil heating, not to adopt punching or raising motor capacity on the motor stator subshell, but adopt fan electromotor shell dress water-cooled sheet, realize the good heat radiating of motor.
Above-mentioned six innovative technologies are applicable to eddy flow carbon dioxide and CO (carbon monoxide converter) laser.Wherein the blower fan outlet is positioned in the middle of the casing, and three technologies such as gas-cooled cathode ceramic box and fan electromotor water-cooled sheet also are applicable to crossflow CO 2 laser.
The laser of the utility model embodiment, volume is little, cost is low, can obtain hectowatt grade to the myriawatt level, is mainly used in the high-quality laser beam of cutting and welding.
Claims (9)
1, the cooling cathode insulation box of gas of gas laser is characterized in that: cathode sheets and heat dissipation metal body are fitted together the formation cathode electrode unit, and head are exposed at outside the radiator, and the cold air runner is arranged in the radiator, and radiator is contained in the insulation booth.
2, cooling cathode insulation box of gas as claimed in claim 1 is characterized in that: the material of insulation booth is pottery or crystallite.
3, cooling cathode insulation box of gas as claimed in claim 1 is characterized in that: several little lattice are arranged in the insulation booth, adorn a cathode electrode unit in each little lattice.
4, circular metal cavity turn of tidal stream laser, it has casing, blower fan, heat exchanger, cylindrical cavity, electrode, working air current, speculum, outgoing mirror, the whole cylindrical cavity of laser is divided into plurality of sections, the entrance channel of each section is dislocatedly distributed on the circumference of cylindrical cavity, the entrance channel center line of cylindrical cavity does not intersect with the chamber axle, the outlet flow center line of cylindrical cavity is with respect to angle of entrance channel center line deflection, it is characterized in that: the negative electrode of laser has a plurality of cooling cathode insulation box of gas, cathode sheets in the cooling cathode insulation box of gas and heat dissipation metal body are fitted together the formation cathode electrode unit, head are exposed at outside the radiator, the cold air runner is arranged in the radiator, and radiator is contained in the insulation booth.
5, circular metal cavity turn of tidal stream laser as claimed in claim 4, it is characterized in that: the material of insulation booth is pottery or crystallite.
6, circular metal cavity turn of tidal stream laser as claimed in claim 4 is characterized in that: several little lattice are arranged in the insulation booth, adorn a cathode electrode unit in each little lattice.
7, as claim 4 or 5 or 6 described circular metal cavity turn of tidal stream lasers, it is characterized in that: the working air current direction in each section of cylindrical cavity is respectively clockwise and is counterclockwise, the blower fan outlet is positioned in the middle of the casing, the working air current of each section of cylindrical cavity entrance channel flows to identical, the cathode electrode unit of clockwise section is positioned at the right of clockwise section entrance channel in the cylindrical cavity, and the cathode electrode unit of section is positioned at the left side of counterclockwise section entrance channel counterclockwise.
8, as claim 4 or 5 or 6 described circular metal cavity turn of tidal stream lasers, it is characterized in that the diameter of the width of cylindrical cavity entrance channel less than cylindrical cavity.
9, as claim 4 or 5 or 6 described circular metal cavity turn of tidal stream lasers, it is characterized in that: the water-cooled sheet is housed on the motor casing of described blower fan, on the water-cooled sheet water cooling tube is housed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620095797 CN2894003Y (en) | 2006-03-24 | 2006-03-24 | Air cold cathode insulation box for gas laser and laser thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620095797 CN2894003Y (en) | 2006-03-24 | 2006-03-24 | Air cold cathode insulation box for gas laser and laser thereof |
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| Publication Number | Publication Date |
|---|---|
| CN2894003Y true CN2894003Y (en) | 2007-04-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620095797 Expired - Lifetime CN2894003Y (en) | 2006-03-24 | 2006-03-24 | Air cold cathode insulation box for gas laser and laser thereof |
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| CN (1) | CN2894003Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438234C (en) * | 2006-03-21 | 2008-11-26 | 李再光 | Gas cooling cathode insulation box of gas laser and its laser |
-
2006
- 2006-03-24 CN CN 200620095797 patent/CN2894003Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100438234C (en) * | 2006-03-21 | 2008-11-26 | 李再光 | Gas cooling cathode insulation box of gas laser and its laser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081126 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |