CN110302909A - A kind of high-power hot cathode supersonic plasma spray rifle - Google Patents
A kind of high-power hot cathode supersonic plasma spray rifle Download PDFInfo
- Publication number
- CN110302909A CN110302909A CN201910470222.2A CN201910470222A CN110302909A CN 110302909 A CN110302909 A CN 110302909A CN 201910470222 A CN201910470222 A CN 201910470222A CN 110302909 A CN110302909 A CN 110302909A
- Authority
- CN
- China
- Prior art keywords
- electrode
- hole
- jet pipe
- tip holder
- back segment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007921 spray Substances 0.000 title claims abstract description 49
- 239000004677 Nylon Substances 0.000 claims abstract description 30
- 229920001778 nylon Polymers 0.000 claims abstract description 30
- 230000002708 enhancing effect Effects 0.000 claims abstract description 27
- 239000000498 cooling water Substances 0.000 claims description 36
- 108091006146 Channels Proteins 0.000 claims description 28
- 239000000843 powder Substances 0.000 claims description 21
- 230000004323 axial length Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 2
- 238000004804 winding Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000010891 electric arc Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007750 plasma spraying Methods 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 241001149930 Protura <class> Species 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010494 dissociation reaction Methods 0.000 description 1
- 230000005593 dissociations Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 210000000548 hind-foot Anatomy 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 230000003019 stabilising effect Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/03—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying
- B05B5/032—Discharge apparatus, e.g. electrostatic spray guns characterised by the use of gas, e.g. electrostatically assisted pneumatic spraying for spraying particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/06—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means using electric arc
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/081—Plant for applying liquids or other fluent materials to objects specially adapted for treating particulate materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/08—Plant for applying liquids or other fluent materials to objects
- B05B5/087—Arrangements of electrodes, e.g. of charging, shielding, collecting electrodes
Landscapes
- Plasma Technology (AREA)
Abstract
A kind of high-power hot cathode supersonic plasma spray rifle, comprising: rear electrode tip holder, enhancing nylon jacket, rear electrode, preceding electrode, shell, field coil, jet pipe back segment and jet pipe leading portion；Electrode tip holder, rear electrode, preceding electrode, jet pipe back segment and jet pipe leading portion sequentially coaxially cooperate arrangement afterwards, enhance nylon jacket and shell is coaxially arranged with rear electrode tip holder from inside to outside, the front of electrode before field coil is coaxially wrapped in, electrode is hot cathode type electrode afterwards, preceding electrode and jet pipe are split type structure, and rear electrode tip holder front side wall is provided with tangential sonic nozzle.The present invention can be improved the service life of electrode, reduce anode use cost, and spray gun maximum power reaches 250kW, improves spray efficiency.
Description
Technical field
The invention belongs to arc plasma coating preparation fields, are related to a kind of high-power hot cathode supersonic plasma spray
Rifle.
Background technique
Plasma-spray technique is using the non-diverting plasma-arc of rigidity as heat source, by powder such as ceramics, alloy, metals
Material is heated to melting or semi-molten state, and high speed sprays to the surface for by pretreated workpiece surface and forming adhesion-tight
The method of layer.The technology is because the coating quality of its preparation is good, bond strength is high, small etc. excellent more than coat type and to matrix effect
It puts and is used widely.
Plasma spraying can be divided into subsonic speed plasma spraying and supersonic plasma spray according to spraying air velocity.Phase
Compared with subsonic speed plasma spraying, air velocity faster, carries sprayed particle and reaches higher under the conditions of supersonic plasma spray
Speed, reach matrix surface after flattening effect it is more preferable, keep the connection in coating between particle even closer, to reduce
Coating porosity increases the bond strength of coating, therefore supersonic plasma spray technology increasingly becomes plasma spray technology
One of prior development direction.
Supersonic plasma spray rifle is the core equipment of supersonic plasma spray system, is converted by its electric heating, real
The High Temperature And Velocity of existing gas.Since plasma flow to be made reaches supersonic speed condition, need that spray gun is made to generate enough energy
Amount and arc chamber pressure, but with the increase of arc chamber pressure, heat flow density increases, to the structure of spray gun each section, cooling, material,
More stringent requirements are proposed for control of electric arc etc..Existing supersonic speed plasma gun cathodic discharge area is mostly sharp cone distal, sun
Extremely Laval nozzle, the supersonic speed plasma gun of the structure easily occur that cathode conehead scaling loss is very fast, service life shorter problem,
Anode is as lossy structure simultaneously, as the continuous scaling loss of anode supersonic speed easily occurs so that the type face of jet pipe changes
The problems such as shock wave is generated in interference in air flow or jet pipe is needed in the process of anode to complicated nozzle contour at the same time
It is formed, so that the manufacturing cost and use cost of anode rises.Limitation based on conditions above, the power of spray gun all control substantially
At hundred kilowatts hereinafter, spray efficiency is also subject to certain restrictions.
Summary of the invention
The object of the present invention is to provide a kind of high-power hot cathode supersonic plasma spray rifle, rear electrode is hot cathode,
The service life of electrode is improved, anode use cost is reduced, spray gun maximum power reaches 250kW, improves spray efficiency.
The technical scheme adopted by the invention is that:
A kind of high-power hot cathode supersonic plasma spray rifle, comprising: rear electrode tip holder, enhancing nylon jacket, rear electrode, preceding
Electrode, shell, field coil, jet pipe back segment and jet pipe leading portion；
Electrode tip holder, enhancing nylon jacket, preceding electrode, jet pipe back segment and jet pipe leading portion sequentially coaxially cooperate arrangement afterwards, before described
Multiturn field coil is wound on electrode on the cylindrical structure outer wall of jet pipe hindfoot portion, shell is sleeved on the enhancing nylon
The outside of set and the preceding electrode, it is described after electrode tip holder towards being provided with rear electrode on the end face of the preceding electrode side, it is described
It is not contacted between preceding electrode and the rear electrode；The field coil connects external power supply power supply；The preceding electrode and it is described after
Electrode connects external spray rifle DC power supply；
The enhancing nylon jacket, preceding electrode, shell, be provided with inside jet pipe back segment and jet pipe leading portion it is circumferentially uniformly distributed cold
But water loops, the entrance of the cooling water loop are arranged radially on the cylindrical section of shell and preceding electrode suit, the cooling
The outlet of water loops is axially arranged on the rear electrode tip holder；
Working media channel is set inside the enhancing nylon jacket, and the rear electrode tip holder side wall is tangentially provided with to be sprayed as the velocity of sound
The through-hole of mouth, the preceding electrode interior are provided with central through hole, and it is logical to be provided with ladder inside the jet pipe back segment in the axial direction
Hole, the working media channel, sonic nozzle, the central through hole of preceding electrode interior, the ladder hole inside jet pipe back segment are successively
Connection；The jet pipe back segment is additionally provided with the powder channel being connected with the stepped hole inside jet pipe back segment, the powder channel
Axis for through-hole structure, the powder channel intersects with the axis of jet pipe back segment；
It is described after electrode tip holder and enhancing nylon jacket between clearance fit and be capable of later electrode tip holder axis be rotation axis revolve
Turn, between enhancing nylon jacket and the shell clearance fit and can using the axis of shell as rotation axis rotation；The preceding electrode
Between shell clearance fit and can using the axis of shell as rotation axis rotate；
It is fixedly connected between the shell and the jet pipe back segment by flange arrangement；The jet pipe back segment and the jet pipe
Leading portion is integrally welded.
The advantages of the present invention over the prior art are that:
1) rear electrode discharge region of the invention is column end face rather than tip, increases burning of the arc root on rear electrode
Area is lost, while the gas entered by tangential sonic nozzle passes through along cylindric rear electrode periphery rotation, so that arc root is rear
It is rotated on electrode end surface, improves the uniformity in scaling loss region, conducive to the service life of electrode after raising；
2) it is accelerated while the field coil of the front of electrode carries out magnetic confinement to electric arc before the present invention is coaxially wrapped in
The rotation of arc root on the front electrode, with cyclone stabilising arc collective effect, electrode erosion area before increasing, electrode makes before improving
Use the service life；
3) electrode and jet pipe are split type structure before the present invention, make the preceding electrode airflow channel shape as expendable structure
It is more simple, difficulty of processing and use cost are reduced, while preceding electrode axial length guarantees that arc root is fallen on the front electrode always
Without fall on jet pipe to type face generate scaling loss, therefore jet pipe as absolute construction only play the role of acceleration air-flow rather than
A part of expendable electrode reduces the requirement to its material；
4) present invention can be implemented in nozzle divergence cones into powder, improve dusty spray in high-temperature plasma flame stream when
Between and stroke, the fusing of powder can be strengthened, improve the speed of powder, for promoted the performance of coating of preparation have it is positive
Effect, while can effectively avoid the powder bonding and blocking in nozzle throat region.
Detailed description of the invention
Fig. 1 is the schematic diagram of apparatus of the present invention；
Fig. 2 is A-A diagrammatic cross-section in Fig. 1；
Fig. 3 is B-B diagrammatic cross-section in Fig. 1；
Fig. 4 is C-C diagrammatic cross-section in Fig. 1.
Specific embodiment
A kind of high-power hot cathode supersonic plasma spray rifle of the present invention includes: rear electrode tip holder 1, enhancing as shown in Figure 1
Nylon jacket 2, rear electrode 3, preceding electrode 4, shell 5, field coil 6, jet pipe back segment 7 and jet pipe leading portion 8.Electrode tip holder 1, enhancing Buddhist nun afterwards
From left to right sequentially coaxially cooperation is arranged for the actor playing a supporting role 2, preceding electrode 4, jet pipe back segment 7 and jet pipe leading portion 8, close to jet pipe on preceding electrode 4
Multiturn field coil 6 is wound on the cylindrical structure outer wall of 7 part of back segment, magnetic confinement is carried out to electric arc, while accelerating arc root preceding
Rotation on electrode, electrode erosion area before increasing, electrode life before improving.Winding the number of turns of specific field coil 6 is 5
~15 circles；It is axial that the maximum distance of the field coil 6 to 7 joint face of preceding electrode 4 and jet pipe back segment is no more than the preceding electrode 4
The 1/3 of length.Shell 5 is sleeved on the outside of the enhancing nylon jacket 2 and the preceding electrode 4, it is described after electrode tip holder 1 towards described
It is provided with rear electrode 3 on the end face of preceding 4 side of electrode, is not contacted between the preceding electrode 4 and the rear electrode 3；I.e. preceding electrode 4
The retention gap between the rear electrode 3, the value range of the clearance distance are 2-5mm.The field coil 6 connects outside
Power supply；The preceding electrode 4 and the rear electrode 3 connect external spray rifle DC power supply；Spray gun DC power supply electricity
The value range of stream is 100~1000A.
It is provided with inside the enhancing nylon jacket 2, preceding electrode 4, shell 5, jet pipe back segment 7 and jet pipe leading portion 8 circumferential equal
The cooling water loop of cloth, the entrance of the cooling water loop are arranged radially on the cylindrical section of shell 5 and preceding electrode 4 suit,
The outlet of the cooling water loop is axially arranged on the rear electrode tip holder 1；
Working media channel is set inside the enhancing nylon jacket 2, and rear 1 side wall of electrode tip holder is tangentially provided with as the velocity of sound
For controlling gas flow, according to gas characteristic, working gas air inlet can be realized by upstream supply gas pressure in the through-hole of nozzle
The calculating and control of amount, while the structure is conducive to the stabilization of arc room pressure, prevents pressure oscillation in arc chamber from upstream propagating.
The preceding electrode 4 is internally provided with central through hole, is provided with ladder hole in the axial direction inside the jet pipe back segment 7, described
Working media channel, sonic nozzle, the central through hole inside preceding electrode 4, the ladder hole inside jet pipe back segment 7 are sequentially communicated；
The jet pipe back segment 7 is additionally provided with the powder channel being connected with the stepped hole inside jet pipe back segment 7, and the powder channel is logical
The axis of pore structure, the powder channel intersects with the axis of jet pipe back segment 7；The axis and jet pipe back segment 7 of the powder channel
The angle value range of axis be 80 °~90 °, flowing to for the powder channel export direction and working media is identical.
It is described after electrode tip holder 1 and enhancing nylon jacket 2 between clearance fit and be capable of later electrode tip holder 1 axis be rotation axis
Rotation, between enhancing nylon jacket 2 and the shell 5 clearance fit and can using the axis of shell 5 as rotation axis rotation；Before described
Between electrode 4 and shell 5 clearance fit and can using the axis of shell 5 as rotation axis rotate；
It is fixedly connected between the shell 5 and the jet pipe back segment 7 by flange arrangement；The jet pipe back segment 7 with it is described
Jet pipe leading portion 8 is integrally welded.
As shown in Fig. 2, rear electrode tip holder 1 is the cylindrical structure for being provided with axial central through hole, rear electrode tip holder 1 is towards the preceding electricity
Front end of the one end of pole 4 as the rear electrode tip holder 1, rear end of the other end of rear electrode tip holder 1 as the rear electrode tip holder 1；Institute
The front end for stating rear electrode tip holder 1 is also provided with counterbore, and the aperture of the counterbore is greater than the aperture of central through hole described in rear electrode tip holder 1.Afterwards
Electrode 3 is multi-diameter shaft, and the multi-diameter shaft includes small end cylinder and big end cylinder, small end cylinder electrode tip holder 1 after described
Front end is inserted into the central through hole of the rear electrode tip holder 1, the central through hole of the outer diameter of the small end cylinder and the rear electrode tip holder 1
Apertures, the big end cylinder is provided with conical structure towards the preceding electrode 4, the end face of the small end cylinder；It is described
The outer diameter of big end cylinder is less than the aperture of counterbore described in rear electrode 3；3 material of electrode is electron work functon lower than 10eV's after described
Metal or alloy.
In conjunction with shown in Fig. 1 and Fig. 3, sonic nozzle is located at the counterbore section of the rear electrode tip holder 1, and n sonic nozzle is circumferentially equal
Cloth, the value range of the sonic nozzle diameter are 0.5~2mm, and the value range of n is 2~6.
As shown in Fig. 2, annular groove is provided on the outer wall that rear electrode tip holder 1 is contacted with the enhancing nylon jacket 2, it is electric after described
Electrode seat 1 is radially provided with multiple through-holes, it is described after the multiple through-holes of electrode tip holder 1 radially make the annular groove and
The central through hole connection of electrode tip holder 1 is used as cooling water loop afterwards；
The sectional area A of 3 small end cylinder of electrode after described1=(I/n1)2, wherein I is the electric current of spray gun DC power supply,
Current value after i.e. between electrode 3 and preceding electrode 4, n1Value range be 60~90；Electrode 3 is hot cathode type electricity after described
Pole.
As shown in Fig. 2, enhancing nylon jacket 2 is radially provided with multiple through-holes as cooling water loop, the through-hole
Position of opening with it is described after on electrode tip holder 1 outer wall the position of annular groove it is corresponding.Enhancing nylon jacket 2 is also provided with to be situated between as work
The through-hole in matter channel, entrance of the one end in the working media channel as working media, the working media channel it is another
The sonic nozzle of electrode tip holder 1 after end connection is described.
As shown in figure 3, shell 5 is the cylindrical structure for being provided with ladder hole, the barrel inner circumferential of the shell 5 is evenly equipped with work
For the pipeline of cooling water loop, one end of pipeline as the cooling water loop in water outlet link enhancement nylon jacket 2, pipeline it is another
One end is as the cooling water loop in water inlet connecting spray nozzle back segment 7.
Preceding 4 central through hole sectional area A of electrode2=I/n2, wherein I is the electric current of spray gun DC power supply, n2Value
Range is 5~10, and the axial length of the central through hole of the preceding electrode 4 isn3Value range be 6~8.
The preceding electrode 4 is cylindrical structure, and circumferentially uniformly distributed cooling water loop is provided in the cylindrical wall, electric before described
One end of 4 cooling water loop of pole passes through cooling outside 5 wall aperture of shell connection as cooling water inlet, the cooling water inlet
The other end of water lines, the preceding 4 cooling water loop of electrode is connected to the cooling water loop inside the jet pipe back segment 7.
The jet pipe back segment 7 is the cylindrical structure for being provided with ladder hole, and the ladder hole includes first be sequentially connected
Taper hole, circular hole and the second taper hole；The axial length of first taper hole is less than the axial length of second taper hole, and described the
The taper of one taper hole is greater than the taper of second taper hole；The miner diameter end of first taper hole is small towards second taper hole
The opening direction at diameter end, i.e., described first taper hole is opposite with the opening direction of second taper hole；As Figure 1 and Figure 4, described
Cooling water loop in jet pipe back segment 7 include feed line section, outflow line segments, one end of the feed line section and it is described before
The cooling water loop of electrode 4 is connected to, and one end of the outflow line segments is connected to the cooling water loop of the shell 5；The spray
Cooling water loop in pipe leading portion 8 is connected to the feed line section in the jet pipe back segment 7 with outflow line segments.
The value range of 7 circular hole portion axial length of jet pipe back segment is 1~3mm；The bigger diameter end of first taper hole with it is described
Preceding 4 central through hole dimensional fits of electrode, the path end cross-sectional area of the major diameter end cross-sectional area and the second taper hole of second taper hole
The value range of ratio is 1.05~4.2:1；Powder channel is provided on the hole wall of second taper hole.
It is 250kW that spray gun maximum power, which may be implemented, in the present invention, and working principle is as follows: producing between rear electrode 3 and preceding electrode 4
Raw electric arc, the gas entered from the tangential sonic nozzle of rear electrode tip holder 1 occur dissociation and ionization by electric arc, form high-temperature plasma
Body air-flow, air-flow reach supersonic speed behind face by the taper of jet pipe leading portion 7 contraction-short straight section-cone expansion type, intend the painting of spraying
Layer material powder enters from expansion segment, mixes with the supersonic speed plasma air-flow of high temperature, is heated fusing and acceleration.
The content that description in the present invention is not described in detail belongs to the common knowledge of professional and technical personnel in the field.
Claims (10)
1. a kind of high-power hot cathode supersonic plasma spray rifle characterized by comprising rear electrode tip holder (1), enhancing nylon
Cover (2), rear electrode (3), preceding electrode (4), shell (5), field coil (6), jet pipe back segment (7) and jet pipe leading portion (8)；
Electrode tip holder (1), enhancing nylon jacket (2), preceding electrode (4), jet pipe back segment (7) and jet pipe leading portion (8) sequentially coaxially cooperate afterwards
It arranges, winds multiturn field coil (6) on the cylindrical structure outer wall of jet pipe back segment (7) part on the preceding electrode (4), shell
Body (5) is sleeved on the outside of enhancing nylon jacket (2) and the preceding electrode (4), and the electrode tip holder (1) afterwards is towards the preceding electricity
It is provided with rear electrode (3) on the end face of pole (4) side, is not contacted between the preceding electrode (4) and the rear electrode (3)；It is described
Field coil (6) connects external power supply power supply；The preceding electrode (4) and the rear electrode (3) connect external spray rifle direct current
Power supply；
It is provided with inside the enhancing nylon jacket (2), preceding electrode (4), shell (5), jet pipe back segment (7) and jet pipe leading portion (8)
Circumferentially uniformly distributed cooling water loop, the entrance of the cooling water loop are arranged radially in shell (5) and preceding electrode (4) suit
On cylindrical section, the outlet of the cooling water loop is axially arranged on the rear electrode tip holder (1)；
Working media channel is set inside the enhancing nylon jacket (2), and described rear electrode tip holder (1) side wall is tangentially provided with as the velocity of sound
The through-hole of nozzle, the preceding electrode (4) are internally provided with central through hole, are arranged in the axial direction inside the jet pipe back segment (7)
There is ladder hole, the internal central through hole of the working media channel, sonic nozzle, preceding electrode (4), jet pipe back segment (7) are internal
Ladder hole be sequentially communicated；The jet pipe back segment (7) is additionally provided with the powder that the stepped hole internal with jet pipe back segment (7) is connected
Last channel, the powder channel are through-hole structure, and the axis of the powder channel intersects with the axis of jet pipe back segment (7)；
It is described after electrode tip holder (1) and enhancing nylon jacket (2) between clearance fit and be capable of later electrode tip holder (1) axis be rotate
Axis rotation, between enhancing nylon jacket (2) and the shell (5) clearance fit and can using the axis of shell (5) as rotation axis rotation
Turn；Between the preceding electrode (4) and shell (5) clearance fit and can using the axis of shell (5) as rotation axis rotate；
It is fixedly connected between the shell (5) and the jet pipe back segment (7) by flange arrangement；The jet pipe back segment (7) and institute
It is integrally welded to state jet pipe leading portion (8).
2. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 1, it is characterised in that: the powder
The angle value range of the axis of the axis and jet pipe back segment (7) in last channel is 80 °~90 °, the powder channel export direction
It is identical as flowing to for working media.
3. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 1, it is characterised in that:
Electrode tip holder (1) is the cylindrical structure for being provided with axial central through hole after described, and rear electrode tip holder (1) is towards the preceding electrode (4)
Front end of the one end as electrode tip holder (1) after described, the rear end of the other end of rear electrode tip holder (1) as electrode tip holder (1) after described；
The front end of electrode tip holder (1) is also provided with counterbore after described, and the aperture of the counterbore is greater than the hole of rear electrode tip holder (1) described central through hole
Diameter；
Electrode (3) is multi-diameter shaft after described, and the multi-diameter shaft includes small end cylinder and big end cylinder, and the small end cylinder is from described
After the front end insertion of electrode tip holder (1) is described afterwards in the central through hole of electrode tip holder (1), the outer diameter of the small end cylinder and the rear electricity
The end face of the apertures of the central through hole of electrode seat (1), the small end cylinder is provided with conical structure；Outside the big end cylinder
Diameter is less than the aperture of rear electrode (3) described counterbore；
The sonic nozzle is located at the counterbore section of the rear electrode tip holder (1), and n sonic nozzle is circumferentially uniformly distributed, the sonic nozzle
The value range of diameter is 0.5~2mm, and the value range of n is 2~6；
Annular groove, the rear electrode tip holder are provided on the outer wall that electrode tip holder (1) is contacted with enhancing nylon jacket (2) after described
(1) be radially provided with multiple through-holes, it is described after the multiple through-holes of electrode tip holder (1) radially make the annular groove and
The central through hole connection of electrode tip holder (1) is used as cooling water loop afterwards；
The sectional area A of electrode (3) small end cylinder after described1=(I/n1)2, wherein I is the electric current of spray gun DC power supply, n1
Value range be 60~90；Electrode (3) is hot cathode type electrode after described.
4. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 3, it is characterised in that: the increasing
Strong nylon jacket (2) is radially provided with multiple through-holes as cooling water loop, the position of opening of the through-hole and it is described after
The position of annular groove is corresponding on electrode tip holder (1) outer wall；
Enhancing nylon jacket (2) is also provided with the through-hole as working media channel, one end conduct in the working media channel
The entrance of working media, the sonic nozzle of electrode tip holder (1) after the other end connection in the working media channel is described.
5. a kind of high-power hot cathode supersonic plasma spray rifle, feature described according to claim 1~one of 4 exist
In: the shell (5) is the cylindrical structure for being provided with ladder hole, and the barrel inner circumferential of the shell (5) is evenly equipped with as cooling
The pipeline of water loops, one end of pipeline is as the cooling water loop in water outlet link enhancement nylon jacket (2), the other end of pipeline
As the cooling water loop in water inlet connecting spray nozzle back segment (7).
6. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 5, it is characterised in that:
Preceding electrode (4) the central through hole sectional area A2=I/n2, wherein I is the electric current of spray gun DC power supply, n2Take
Being worth range is 5~10, and the axial length of the central through hole of the preceding electrode (4) isn3Value range be 6
~8；
The preceding electrode (4) is cylindrical structure, is provided with circumferentially uniformly distributed cooling water loop, the preceding electrode in the cylindrical wall
(4) one end of cooling water loop passes through external cold in shell (5) wall aperture connection as cooling water inlet, the cooling water inlet
But the cooling water loop of water lines, the other end of preceding electrode (4) the cooling water loop and the jet pipe back segment (7) inside connects
It is logical；
The maximum distance of the field coil (6) to preceding electrode (4) and jet pipe back segment (7) joint face is no more than the preceding electrode
(4) the 1/3 of axial length.
7. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 6, it is characterised in that: the magnetic
Winding the number of turns of field coil (6) is 5~15 circles；
Electrode (3) material is the metal or alloy that electron work functon is lower than 10eV after described；
The value range of the spray gun DC power supply electric current is 100~1000A.
8. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 7, it is characterised in that: the spray
Pipe back segment (7) is the cylindrical structure for being provided with ladder hole, and the ladder hole includes the first taper hole being sequentially connected, circular hole and
Two taper holes；The axial length of first taper hole is less than the axial length of second taper hole, and the taper of first taper hole
Greater than the taper of second taper hole；Miner diameter end of the miner diameter end of first taper hole towards second taper hole；
Cooling water loop in the jet pipe back segment (7) include feed line section, outflow line segments, the one of the feed line section
End is connected to the cooling water loop of the preceding electrode (4), one end of the outflow line segments and the cooling water ring of the shell (5)
Road connection；
Cooling water loop in the jet pipe leading portion (8) makes feed line section and outflow line segments in the jet pipe back segment (7)
Connection.
9. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 8, it is characterised in that: the spray
The value range of pipe back segment (7) circular hole portion axial length is 1~3mm；
The bigger diameter end of first taper hole and preceding electrode (4) the central through hole dimensional fits, the bigger diameter end of second taper hole
The value range of the ratio of the path end cross-sectional area of sectional area and the second taper hole is 1.05~4.2:1；
Powder channel is provided on the hole wall of second taper hole.
10. a kind of high-power hot cathode supersonic plasma spray rifle according to claim 9, it is characterised in that: described
Retention gap between preceding electrode (4) and the rear electrode (3), the value range of the clearance distance are 2-5mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910470222.2A CN110302909B (en) | 2019-05-31 | 2019-05-31 | High-power hot cathode supersonic plasma spraying gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910470222.2A CN110302909B (en) | 2019-05-31 | 2019-05-31 | High-power hot cathode supersonic plasma spraying gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110302909A true CN110302909A (en) | 2019-10-08 |
| CN110302909B CN110302909B (en) | 2024-03-15 |
Family
ID=68075219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910470222.2A Active CN110302909B (en) | 2019-05-31 | 2019-05-31 | High-power hot cathode supersonic plasma spraying gun |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110302909B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517916A (en) * | 2020-11-23 | 2021-03-19 | 张爽 | Device and method for preparing spherical powder by using tubular electrode and spray welding |
| CN113677081A (en) * | 2021-08-13 | 2021-11-19 | 四川大学 | Reversed polarity plasma spraying gun for ultra-low pressure plasma spraying |
| CN114672758A (en) * | 2022-03-02 | 2022-06-28 | 郑州轻工业大学 | Magnetic field regulation and control supersonic speed plasma hot spraying device |
| CN116924821A (en) * | 2023-09-13 | 2023-10-24 | 上海康碳复合材料科技有限公司 | Carbon-carbon crucible with silicon carbide anaerobic coating and preparation method thereof |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04246160A (en) * | 1991-02-01 | 1992-09-02 | Matsushita Electric Ind Co Ltd | Thermal-spraying torch |
| ATA126097A (en) * | 1997-07-24 | 1998-06-15 | Hans Arthofer Ges M B H & Co K | METHOD AND DEVICE FOR METALLIC COATING OF A CARRIER MATERIAL BY PLASMA SPRAYING |
| CN2393303Y (en) * | 1999-09-17 | 2000-08-23 | 中国航天科技集团公司第七○一研究所 | Hot spraying supersonic electric arc plasma spray gun |
| DE10223865A1 (en) * | 2002-05-29 | 2003-12-24 | Plasmatreat Gmbh | Process for plasma coating workpieces, e.g. for applying barrier layers on plastics or elastomers, comprises using a coating material which is contained as a solid in an electrode of the plasma nozzle |
| CN1481939A (en) * | 2002-09-12 | 2004-03-17 | 中国科学院力学研究所 | Fistular cathodic axial powder feeding plasma painting gun |
| KR101041887B1 (en) * | 2010-05-14 | 2011-06-15 | 국방과학연구소 | Nontransferred plasma torch having constricted electrode |
| CN104470187A (en) * | 2014-11-13 | 2015-03-25 | 周开根 | Double-pole electric arc plasma torch used for water pyrolysis |
| CN107072027A (en) * | 2015-04-12 | 2017-08-18 | 衢州迪升工业设计有限公司 | Plasma gasification spray gun |
| DE102016104128A1 (en) * | 2016-03-07 | 2017-09-07 | Plasmatreat Gmbh | Method for coating a component surface, coated component and use of a precursor material |
| CN210474360U (en) * | 2019-05-31 | 2020-05-08 | 中国航天空气动力技术研究院 | High-power hot cathode supersonic speed plasma spraying gun |
-
2019
- 2019-05-31 CN CN201910470222.2A patent/CN110302909B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04246160A (en) * | 1991-02-01 | 1992-09-02 | Matsushita Electric Ind Co Ltd | Thermal-spraying torch |
| ATA126097A (en) * | 1997-07-24 | 1998-06-15 | Hans Arthofer Ges M B H & Co K | METHOD AND DEVICE FOR METALLIC COATING OF A CARRIER MATERIAL BY PLASMA SPRAYING |
| CN2393303Y (en) * | 1999-09-17 | 2000-08-23 | 中国航天科技集团公司第七○一研究所 | Hot spraying supersonic electric arc plasma spray gun |
| DE10223865A1 (en) * | 2002-05-29 | 2003-12-24 | Plasmatreat Gmbh | Process for plasma coating workpieces, e.g. for applying barrier layers on plastics or elastomers, comprises using a coating material which is contained as a solid in an electrode of the plasma nozzle |
| CN1481939A (en) * | 2002-09-12 | 2004-03-17 | 中国科学院力学研究所 | Fistular cathodic axial powder feeding plasma painting gun |
| KR101041887B1 (en) * | 2010-05-14 | 2011-06-15 | 국방과학연구소 | Nontransferred plasma torch having constricted electrode |
| CN104470187A (en) * | 2014-11-13 | 2015-03-25 | 周开根 | Double-pole electric arc plasma torch used for water pyrolysis |
| CN107072027A (en) * | 2015-04-12 | 2017-08-18 | 衢州迪升工业设计有限公司 | Plasma gasification spray gun |
| DE102016104128A1 (en) * | 2016-03-07 | 2017-09-07 | Plasmatreat Gmbh | Method for coating a component surface, coated component and use of a precursor material |
| CN210474360U (en) * | 2019-05-31 | 2020-05-08 | 中国航天空气动力技术研究院 | High-power hot cathode supersonic speed plasma spraying gun |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112517916A (en) * | 2020-11-23 | 2021-03-19 | 张爽 | Device and method for preparing spherical powder by using tubular electrode and spray welding |
| CN113677081A (en) * | 2021-08-13 | 2021-11-19 | 四川大学 | Reversed polarity plasma spraying gun for ultra-low pressure plasma spraying |
| CN113677081B (en) * | 2021-08-13 | 2022-06-03 | 四川大学 | Reversed polarity plasma spraying gun for ultra-low pressure plasma spraying |
| CN114672758A (en) * | 2022-03-02 | 2022-06-28 | 郑州轻工业大学 | Magnetic field regulation and control supersonic speed plasma hot spraying device |
| CN114672758B (en) * | 2022-03-02 | 2024-02-02 | 郑州轻工业大学 | Magnetic field regulating supersonic plasma thermal spraying device |
| CN116924821A (en) * | 2023-09-13 | 2023-10-24 | 上海康碳复合材料科技有限公司 | Carbon-carbon crucible with silicon carbide anaerobic coating and preparation method thereof |
| CN116924821B (en) * | 2023-09-13 | 2023-12-12 | 上海康碳复合材料科技有限公司 | Carbon-carbon crucible with silicon carbide anaerobic coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110302909B (en) | 2024-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110302909A (en) | A kind of high-power hot cathode supersonic plasma spray rifle | |
| JP3007895B2 (en) | Single cathode plasma gun and anode attachment for use therein | |
| JP5690891B2 (en) | Axial feed type plasma spraying equipment | |
| JPH04227879A (en) | Powder external feed type plasma spray device | |
| CN104955582B (en) | Apparatus for thermally coating a surface | |
| CN107124814A (en) | A kind of many negative electrode laminar flow plasma powder spheroidization devices | |
| CN207560425U (en) | A kind of hybrid plasma body generator for silica-base material processing | |
| CN105755421A (en) | Direct-current argon arc plasma powder spray gun and manufacturing method | |
| CN101954324B (en) | Plasma spray gun used for low-pressure plasma spraying | |
| CN104498862A (en) | High-speed gas-electric arc composite thermal spraying method and spray gun used in same | |
| CN111286693A (en) | Microporous anode for cluster plasma spray gun and cluster plasma spraying method | |
| CN103874313A (en) | Ultrasonic plasma gun feeding powder internally | |
| CN210474360U (en) | High-power hot cathode supersonic speed plasma spraying gun | |
| CN101289744A (en) | Supersonic reaction plasma spray gun | |
| CN212451593U (en) | Plasma spray gun | |
| CN1404925A (en) | Plasma spraying gun | |
| CN114481003A (en) | Hot cathode spray gun, nano plasma spraying device and method | |
| CN113713979A (en) | Electromagnetic induction heating auxiliary cold spraying spray gun device | |
| CN105327804B (en) | Novel supersonic electric arc spray gun, spray equipment and the method for preparing Fe-Cr-Ni composite coatings | |
| CN112695268B (en) | Annular powder feeding and gas focusing device for supersonic plasma spraying | |
| CN206894987U (en) | A kind of more negative electrode laminar flow plasma powder spheroidization devices | |
| CN210287470U (en) | Supersonic plasma spraying spray pipe capable of adjusting inner powder feeding position | |
| CN112647037A (en) | Four-cathode plasma spraying spray gun device | |
| CN110700947B (en) | Sliding arc plasma combustion-supporting exciter independent of external gas supply of combustion chamber | |
| CN201411486Y (en) | Plasma arc and powder particle flow protection device for plasma spray gun |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |