CN106016258A - Novel hypersonic flame spraying gun - Google Patents
Novel hypersonic flame spraying gun Download PDFInfo
- Publication number
- CN106016258A CN106016258A CN201610466204.3A CN201610466204A CN106016258A CN 106016258 A CN106016258 A CN 106016258A CN 201610466204 A CN201610466204 A CN 201610466204A CN 106016258 A CN106016258 A CN 106016258A
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- CN
- China
- Prior art keywords
- gun barrel
- cavity
- gun
- coaxial
- chamber shell
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- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/24—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space by pressurisation of the fuel before a nozzle through which it is sprayed by a substantial pressure reduction into a space
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D11/00—Burners using a direct spraying action of liquid droplets or vaporised liquid into the combustion space
- F23D11/36—Details, e.g. burner cooling means, noise reduction means
- F23D11/40—Mixing tubes or chambers; Burner heads
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2209/00—Safety arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D2214/00—Cooling
Abstract
The invention relates to a novel hypersonic flame spraying gun. The novel hypersonic flame spraying gun mainly comprises a combustor shell body, a gun barrel shell body, a coaxial tail base, a combustor, a gun barrel, two high-pressure oxygen input pipes, two high-pressure liquid fuel input pipes, a catalysis ceramic chip, an ignition needle, power feeding needles, a water cooling sleeve and the like, wherein the gun barrel shell body and the coaxial tail base are coaxially fixed to the front end and the back end of the combustor shell body correspondingly; the combustor is arranged in the combustor shell body; and the gun barrel is arranged in the gun barrel shell body. Compared with traditional hypersonic flame spraying guns, the jet speed and the particle speed are significantly increased through the unique structural design of the novel hypersonic flame spraying gun, jetting of eleven mach cones can be achieved, the jet speed reaches 3500 m/s, and the particle speed reaches 1500 m/s.
Description
Technical field
The present invention relates to a kind of superelevation velocity of sound flame gun, particularly relate to a kind of there is the novel super of high effluxvelocity and particle rapidity
High velocity of sound flame gun.
Background technology
Superelevation velocity of sound flame heat spray technology is widely used in industrial every field, has been increasingly becoming numerous engineering goods
One requisite technique in manufacture process, such as turbine blade, valve, gate, piston rod, steel structure bridge etc., energy
It is effectively improved the performances such as wear-resisting, corrosion-resistant, the endurance of equipment surface, plays raising serviceability, the effect such as increase the service life.
Along with development in recent years, the most both at home and abroad on the superelevation velocity of sound flame heat spray technology that is applied in Practical Project be broadly divided into
Three major types: the first kind is the superelevation velocity of sound plasma spray technology using gaseous fuel (such as propane etc.) with oxygen combustion, such as U.S. METCO
The DJ-2700 etc. that company develops, it is 500-600m/s that this technology can realize particle rapidity.Owing to particle rapidity is relatively low, obtained
The coating porosity obtained is higher, and adhesion is not enough, is easily caused coating localized delamination and relatively low particle rapidity can increase coating
Oxidation and affect coating quality；Equations of The Second Kind is that gaseous fuel (such as propane etc.) improves with atmospheric combustion and by pressure-air
The superelevation velocity of sound plasma spray technology of effluxvelocity, the advantage of this technology applies to the material spraying of low melting point, if material melting point
Improve, then can produce " fecula ", although very trace, but have impact on the abrasion resistance of coating material to a great extent, especially
It is anti-erosion performance；3rd class is the superelevation velocity of sound plasma spray technology of liquid burning (such as aerial kerosene etc.) and oxygen combustion,
Owing to the fluid combustion thermal sprayings such as aerial kerosene are far above gaseous fuels such as propane, the most this technology can realize higher
Effluxvelocity, its particle rapidity reaches 1100m/s.But owing to liquid fuel is abundant not with the mixing of oxygen and burning,
Easily producing carbon distribution, carbon distribution is injected into coating surface, affects coating quality, and under this effluxvelocity, powder particle is still
Can be aoxidized, particularly such as the metal-cermic coating of WC class, coating can be adversely affected by oxidation and decarbonization.
Above superelevation velocity of sound flame heat spray technology classification depends primarily on design and the structure of spray gun, it can be seen that spray gun is super
The part of most critical in high velocity of sound flame heat spray system, the design level of spray gun and version etc. determine the property of whole system
Can, and then determine the performance of coating.The superelevation velocity of sound flame gun both domestic and external that retrieves at present (as
The superelevation velocity of sound flame gun that CN200920265424.5, CN01246986.6, CN03211072.3 etc. introduce) all fail at grain
Burning adequacy, the reasonable structure of sub-speed, liquid fuel and oxygen, install and use the aspects such as convenience and conscientiously make a breakthrough.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that it is new that a kind of effluxvelocity and particle rapidity are all greatly improved
Type superelevation velocity of sound flame gun.
The novel super-high velocity of sound flame gun of the present invention, including burning chamber shell and to be the most coaxially fixed on burning chamber shell forward and backward
The gun barrel housing at two ends and coaxial tailstock, be provided with coaxial combustor in combustion chamber shell body, forms therebetween the first airtight water
Cold cavity, is provided with coaxial gun barrel in barrel casing body, form therebetween the second airtight water-cooled cavity, and barrel casing is external fixing
There is coaxial water collar, form therebetween the first airtight backwater cavity, the second water-cooled cavity and the connection of the first backwater cavity,
Between first and second water-cooled cavity, connection forms water-cooled path, and burning chamber shell also has the second backwater cavity, first and second backwater
Cavity connection forms backwater path；
Combustor internal cavity is Laval configuration, keeps sealing in combustor is inserted in coaxial tailstock front end and with Inner Wall of Combustion Chamber, with
Axle tailstock front end face has annular groove, is provided with catalytic ceramics sheet and is placed on the metallic sheath on catalytic ceramics sheet in groove, catalysis pottery
The periphery of ceramics inner headed face and metallic sheath all keeps sealing with coaxial tailstock, the annular groove face of catalytic ceramics sheet and coaxial tailstock
Form space, coaxial tailstock is provided with and leads to the two-way high pressure oxygen input pipe in this space and divide with two-way high pressure oxygen input pipe
The two-way high pressure liquid fuel input pipe not connected, ignition electrode inserts in chamber cavity from axle center through coaxial tailstock, described
Having some through holes around axle center annular spread on catalytic ceramics sheet, powder feeding pin is inserted into chamber front end cavity through burning chamber shell,
Powder feeding pin shell and burning chamber shell form confined space, this space and backwater communication；
Burning chamber shell is provided with coolant intake and cooling water outlet mouth, coolant intake and the connection of the first water-cooled cavity bottom, cold
But outlet and the connection of the second backwater cavity bottom.
In technique scheme, the described through hole on catalytic ceramics sheet is the oblique through hole towards combustor axle center.
Described water-cooled path is provided with many places hole sizer, and described hole sizer is arranged on burning chamber shell and gun barrel housing, by around burning
Some apertures that axle center, room is distributed ringwise are constituted.
Between described water collar with gun barrel housing, between coaxial tailstock and burning chamber shell, all adopt between gun barrel housing and burning chamber shell
Lock with metal swivel nut.
Described coolant intake and cooling water outlet mouth may be contained within the rear end of burning chamber shell.
A kind of novel super-high velocity of sound flame spray coating device, including above-mentioned novel super-high velocity of sound flame gun.
The beneficial effects of the present invention is:
(1) compared with conventional ultra high velocity of sound flame gun, the structure design of the novel super-high velocity of sound flame gun uniqueness of the present invention is real
Having showed effluxvelocity, being greatly improved of particle rapidity, can realize the jet of 11 Mach cones, effluxvelocity reaches 3500m/s,
Particle rapidity reaches 1500m/s.
(2) present invention eliminates the connector between combustor and gun barrel in conventional ultra high velocity of sound flame gun, use band Lavalle
The combustor of pipe is directly connected with gun barrel so that the structure of spray gun is simpler, and stability is more preferable, and is obtained in that higher
Bore pressure, can promote the raising of effluxvelocity.
(3) using two-way oxygen and liquid fuel input, liquid fuel enters in oxygen pipeline with certain pressure, and high pressure
Oxygen also has certain siphonage to liquid fuel so that liquid fuel enters in oxygen pipeline smoothly, prevents from flowing backwards.
(4) in oxygen pipeline, liquid fuel can preferably mix with oxygen, and by catalytic ceramics sheet and coaxial tail
Can obtain further behind the space that the annular groove face of seat is formed and be sufficiently mixed, well-mixed oxygen-fuel passes through catalytic ceramics again
On sheet, the aperture (especially tiltedly through hole) of annular spread enters in combustor, carries out substantially stabilized burning, it is possible to obtain higher,
More stable, burning capacity more fully, and avoid producing carbon distribution, it is thus achieved that cleaner coating, improves coating quality.
(5) backwater of current superelevation velocity of sound flame gun mainly uses two kinds of forms: arrange backwater holster, backwater holster one end
Be arranged on gun barrel front end, be inserted in burning chamber shell by a water pipe metal tube, need during installation by gun barrel, backwater holster with
And the relative position adjustment of this three of installing hole, to mating completely, just can complete to install on burning chamber shell, this brings to installation
Inconvenience；Cancel this root metal tube on backwater holster, water return outlet is set directly at gun barrel housing forward end, and water will be cooled down
Pipe is connected on water return outlet, and this water return pipeline easily interferes with workpiece and frock etc. during spraying, collides；
And the present invention uses the form of cold water jacket as the backwater of cooling water, and use swivel nut to fix, have stable, install convenient
Etc. feature, it is to avoid the backwater holster that conventional lance uses exists the problems such as installation difficulty, and also solve some spray guns due to
Water return pipeline is easily and workpiece and frock such as interfere at the problem in spraying process to use gun barrel front end backwater.
(6) many places hole sizer is set on water-cooled path, chilled water flow velocity can be made more uniform, with connecing of combustor and gun barrel outer surface
Touch more uniform such that it is able to realize more preferable cooling effect, additionally, powder feeding pin can also be carried out by the backwater path of cooling water
Cooling, prevents powder feeding pin from causing damage due to high temperature.
Accompanying drawing explanation
Fig. 1 is superelevation velocity of sound flame gun structural representation；
Fig. 2 is coaxial tailstock and catalytic ceramics chip architecture schematic diagram；
Fig. 3 is A-A profile；
Fig. 4 is B enlarged drawing；
Fig. 5 is F-F profile；
Fig. 6 is C enlarged drawing；
Fig. 7 is D enlarged drawing；
Fig. 8 is E enlarged drawing.
Detailed description of the invention
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further.
Fig. 1 show a kind of preferably case study on implementation of novel super-high velocity of sound flame gun of the present invention, but is not limited only to this.Such as Fig. 1
Shown in, including two-way high pressure oxygen input pipe 1, two-way high pressure liquid fuel input pipe 2, coaxial tailstock 3, catalytic ceramics sheet 4,
Ignition electrode 5, combustor 6, gun barrel 7, powder feeding pin 8, burning chamber shell 9, gun barrel housing 10, water collar 11, cooling water inlet
Mouth 12, cooling water outlet mouth 13, water-cooled path 14, backwater path 15, lock swivel nut 16,17,18.
Coaxial tailstock 3 is arranged on the caudal end of spray gun, and fore-end injects combustor 6, and keeps sealing with Inner Wall of Combustion Chamber.
Coaxially locked by locking swivel nut 18 between tailstock 3 and burning chamber shell 9.
It is illustrated in figure 2 the structural representation of coaxial tailstock 3 and catalytic ceramics sheet 4, two-way high pressure oxygen input pipe 1, two-way
High pressure liquid fuel input pipe 2 and catalytic ceramics sheet 4 are installed on coaxial tailstock.
Hyperbaric oxygen trachea inserts from coaxial tailstock rear portion, and high pressure oxygen pipeline is provided with an aperture, with high pressure liquid fuel pipe
Road connects, and high pressure liquid fuel enters in oxygen pipeline and mixes with oxygen, enters of annular catalyst potsherd 4 together
The space of the annular that end face is formed with the groove of coaxial tailstock front end face obtains and mixes further, and by being arranged on coaxial tailstock
During on catalytic ceramics sheet 4 in the annular groove of 3 front ends, the some oblique through hole (such as Fig. 3) of annular spread enters combustor, liquid
The mixture of burning and oxygen obtains sufficiently mixing when by catalytic ceramics sheet, and by the oblique through hole on catalytic ceramics sheet
Uniformly enter in combustor, and keep the direction in axle center.
Being cased with metallic sheath at catalytic ceramics sheet periphery, catalytic ceramics sheet 4 inner headed face and coaxial tailstock keep sealing, outside metallic sheath
Disc also keeps sealing with coaxial tailstock 3, it is ensured that will not cause tempering.
After the mixture of well-mixed fuel and oxygen enters the center of combustor 6, by from coaxial tailstock rear end axle
The heart inserts the ignition electrode 5 of combustor and lights, and liquid fuel fully burns with oxygen and produces jet-flow at a high speed, jet-flow warp
Crossing after the further speeding up of the Laval configuration in combustor and gun barrel 7 from gun barrel outlet ejection, effluxvelocity can reach
3500m/s。
Powder feeding pin 8 enters chamber front end horn mouth region through burning chamber shell 9, and powder is uniformly delivered to the center of flame stream,
As shown in Figure 6, through high temperature, high-speed jet melted and after accelerating, powder particle can be ejected into work with the speed of 1500m/s
Part surface, forms coating.
Spray gun is cooled down by the mode using recirculated water cooling, comprises the water-cooled part by water inlet to spray gun front end and by spray gun
Front end is to the backwater part of outlet.
Forming confined space that is first water-cooled cavity between burning chamber shell 9 and combustor 6, cooling water intake 12 is arranged on combustion
Burning and connect with this cavity on room housing 9, combustor 6 and powder feeding pin 8 front end are cooled down by the cooling water in this cavity
In the rear cavity (the second water-cooled cavity) continuing to move forward between gun barrel 7 and gun barrel housing 10, gun barrel is cooled down, so
The cavity (the first backwater cavity) between gun barrel housing 10 and water collar 11 is entered afterwards by the looping pit of gun barrel housing 10 front end
In, the second backwater cavity that the direction toward burning chamber shell 9 is back on burning chamber shell, powder feeding pin 8 shell and combustion chamber shell
Forming confined space between body, with backwater communication, the latter half of powder feeding pin 8 is cooled down by the cooling water of backflow simultaneously,
Finally flow out from outlet 13.
Water-cooled path is provided with many places hole sizer, as shown in Fig. 4,5,7,8, i.e. at burning chamber shell 9, gun barrel housing 10
On be provided with some apertures of annular spread, these apertures are in water-cooled path, little by these annular spread of cooling water
Hole, flow velocity can keep more uniform, more uniform with contacting of combustor 6 and gun barrel 7 outer surface surface, it is possible to realizes more preferably
Cooling effect.
Water inlet 12 and outlet 13 are arranged on burning chamber shell 9, are in the rear portion of spray gun, it is to avoid the pipeline of water-cooled
Interference is caused during spraying.
Water collar 11 can be arranged on gun barrel housing 10 easily by metal swivel nut 16, it is to avoid backwater rifle in conventional lance
The situation of installation difficulty between set and burning chamber shell.
Coaxial tailstock 3 and the contact site of combustion chamber shell 9, gun barrel housing 10 and the contact site of burning chamber shell 9, water collar
11 are respectively adopted metal swivel nut 15,16,17 with the contact site of gun barrel housing 10 locks.
Claims (6)
1. a novel super-high velocity of sound flame gun, it is characterised in that include burning chamber shell (9) and be the most coaxially fixed on
The gun barrel housing (10) at burning chamber shell (9) forward and backward two ends and coaxial tailstock (3), coaxial in combustion chamber shell body be provided with combustion
Burn room (6), form therebetween the first airtight water-cooled cavity, the coaxial gun barrel (7) that is provided with in gun barrel housing (10), two
Forming the second airtight water-cooled cavity between person, gun barrel housing (10) extenal fixation has coaxial water collar (11), shape therebetween
Becoming the first airtight backwater cavity, the second water-cooled cavity and the connection of the first backwater cavity, between first and second water-cooled cavity, connection is formed
Water-cooled path (14), burning chamber shell (9) also has the second backwater cavity, and first and second backwater cavity connection forms backwater
Path (15)；
Combustor internal cavity is Laval configuration, protects in combustor (6) is inserted in coaxial tailstock (3) front end and with Inner Wall of Combustion Chamber
Holding sealing, coaxial tailstock front end face has annular groove, is provided with catalytic ceramics sheet (4) and is placed on catalytic ceramics sheet in groove
Metallic sheath, the periphery of catalytic ceramics sheet inner headed face and metallic sheath all keeps sealing with coaxial tailstock (3), catalytic ceramics sheet (4)
With the formation space, annular groove face of coaxial tailstock, coaxial tailstock is provided with two-way high pressure oxygen input pipe (1) leading to this space
And two-way high pressure liquid fuel input pipe (2) being respectively communicated with two-way high pressure oxygen input pipe, ignition electrode (5) passes from axle center
Coaxial tailstock inserts in chamber cavity, and described catalytic ceramics sheet (4) has some through holes, powder feeding around axle center annular spread
Pin (8) is inserted into chamber front end cavity through burning chamber shell, and powder feeding pin shell forms confined space with burning chamber shell, should
Space and backwater communication；
Burning chamber shell (9) is provided with coolant intake (12) and cooling water outlet mouth (13), coolant intake (12) and the
One water-cooled cavity bottom connection, cooling water outlet mouth (13) connects with the second backwater cavity bottom.
Novel super-high velocity of sound flame gun the most according to claim 1, it is characterised in that described catalytic ceramics sheet (4)
On through hole be the oblique through hole towards combustor axle center.
Novel super-high velocity of sound flame gun the most according to claim 1, it is characterised in that described water-cooled path (14)
Being provided with many places hole sizer, described hole sizer is arranged on burning chamber shell (9) and gun barrel housing (10), and often place's hole sizer is by around combustion
Burn some apertures composition that axle center, room is distributed ringwise.
Novel super-high velocity of sound flame gun the most according to claim 1, it is characterised in that described water collar (11) with
Between gun barrel housing (10), between coaxial tailstock (3) and burning chamber shell (9), gun barrel housing (10) and burning chamber shell (9)
Between all use metal swivel nut to lock.
Novel super-high velocity of sound flame gun the most according to claim 1, it is characterised in that described coolant intake (12)
And cooling water outlet mouth (13) may be contained within the rear end of burning chamber shell (9).
6. a novel super-high velocity of sound flame spray coating device, it is characterised in that this device includes such as any one of claim 1-5 institute
The novel super-high velocity of sound flame gun stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610466204.3A CN106016258B (en) | 2016-06-23 | 2016-06-23 | A kind of superelevation velocity of sound flame gun |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610466204.3A CN106016258B (en) | 2016-06-23 | 2016-06-23 | A kind of superelevation velocity of sound flame gun |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106016258A true CN106016258A (en) | 2016-10-12 |
| CN106016258B CN106016258B (en) | 2018-06-19 |
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ID=57086639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610466204.3A Active CN106016258B (en) | 2016-06-23 | 2016-06-23 | A kind of superelevation velocity of sound flame gun |
Country Status (1)
| Country | Link |
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| CN (1) | CN106016258B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916389A (en) * | 2017-11-16 | 2018-04-17 | 西北工业大学 | A kind of micron order supersonic speed suspension plasma spray apparatus and spraying method |
| CN112126887A (en) * | 2020-09-14 | 2020-12-25 | 水利部杭州机械设计研究所 | Novel air gas type supersonic flame spray gun, spraying device and method for preparing metal ceramic coating |
| CN113909016A (en) * | 2021-11-03 | 2022-01-11 | 水利部杭州机械设计研究所 | Multi-combustion-chamber high-power high-efficiency supersonic flame thermal spraying spray gun and thermal spraying device thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6245390B1 (en) * | 1999-09-10 | 2001-06-12 | Viatcheslav Baranovski | High-velocity thermal spray apparatus and method of forming materials |
| CN1519057A (en) * | 2003-01-21 | 2004-08-11 | 王泰兴 | Axial sending-off powder type flame gun in supersonic speed using liquid fuel as energy sources |
| CN201043190Y (en) * | 2007-06-14 | 2008-04-02 | 中国民航大学 | Mixed combustion-supporting superspeed flame spraying gun in liquid fuel-oxygen-air gun |
| CN104498862A (en) * | 2015-01-04 | 2015-04-08 | 中国人民解放军装甲兵工程学院 | High-speed gas-electric arc composite thermal spraying method and spray gun used in same |
| CN205746820U (en) * | 2016-06-23 | 2016-11-30 | 水利部杭州机械设计研究所 | Novel super-high velocity of sound flame gun |
-
2016
- 2016-06-23 CN CN201610466204.3A patent/CN106016258B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6245390B1 (en) * | 1999-09-10 | 2001-06-12 | Viatcheslav Baranovski | High-velocity thermal spray apparatus and method of forming materials |
| CN1519057A (en) * | 2003-01-21 | 2004-08-11 | 王泰兴 | Axial sending-off powder type flame gun in supersonic speed using liquid fuel as energy sources |
| CN201043190Y (en) * | 2007-06-14 | 2008-04-02 | 中国民航大学 | Mixed combustion-supporting superspeed flame spraying gun in liquid fuel-oxygen-air gun |
| CN104498862A (en) * | 2015-01-04 | 2015-04-08 | 中国人民解放军装甲兵工程学院 | High-speed gas-electric arc composite thermal spraying method and spray gun used in same |
| CN205746820U (en) * | 2016-06-23 | 2016-11-30 | 水利部杭州机械设计研究所 | Novel super-high velocity of sound flame gun |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107916389A (en) * | 2017-11-16 | 2018-04-17 | 西北工业大学 | A kind of micron order supersonic speed suspension plasma spray apparatus and spraying method |
| CN107916389B (en) * | 2017-11-16 | 2019-11-22 | 西北工业大学 | A kind of micron order supersonic speed suspension plasma spray apparatus and spraying method |
| CN112126887A (en) * | 2020-09-14 | 2020-12-25 | 水利部杭州机械设计研究所 | Novel air gas type supersonic flame spray gun, spraying device and method for preparing metal ceramic coating |
| CN112126887B (en) * | 2020-09-14 | 2022-07-08 | 水利部杭州机械设计研究所 | Air-gas type supersonic flame spray gun, spraying device and method for preparing metal ceramic coating |
| CN113909016A (en) * | 2021-11-03 | 2022-01-11 | 水利部杭州机械设计研究所 | Multi-combustion-chamber high-power high-efficiency supersonic flame thermal spraying spray gun and thermal spraying device thereof |
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| Publication number | Publication date |
|---|---|
| CN106016258B (en) | 2018-06-19 |
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