CN1115203C - Multifunctional supersonic flame spraying method and its intelligent control system - Google Patents
Multifunctional supersonic flame spraying method and its intelligent control system Download PDFInfo
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- CN1115203C CN1115203C CN 01128773 CN01128773A CN1115203C CN 1115203 C CN1115203 C CN 1115203C CN 01128773 CN01128773 CN 01128773 CN 01128773 A CN01128773 A CN 01128773A CN 1115203 C CN1115203 C CN 1115203C
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Abstract
The present invention relates to a multifunctional supersonic flame spraying method and an intelligent control system. The method adopts the ways of burning under high pressure, atomizing ejecting flow, igniting by a spark plug, delivering radial pneumatic powder in a negative pressure region at the rear end of a Laval nozzle and cooling water by a refrigerating system. The whole control system comprises five subsystems and the connected relation among the subsystems uses respective control and concentrating installation. The present invention is matched with a flame spraying gun, has the advantages of excellent coating preparation quality, high binding strength, low porosity, high hardness, high abrasion resistance and good corrosion resistant properties, can be widely applied to the occasions of abrasion resistance, ablation resistance, erosion resistance, heat resistance, component reinforcement, etc., and has a wide application foreground.
Description
Technical field
The invention belongs to technical field of hot, relate to a kind of multifunctional supersonic flame spraying method and intelligence control system.
Background technology
HVAF (HVOF) is a kind of heat spraying method that grows up the eighties, this spraying method is since exploitation, because its excellent coating performance has obtained using widely in industry, particularly in Aeronautics and Astronautics and some other field that coating performance is had relatively high expectations.In recent years, HVAF development becomes in the thermal spraying one of the most great-hearted spraying method rapidly.Before the present invention, in the ground prior art, multiple supersonic flame spraying method is arranged, and experienced three developing stage.The HVOF spraying method of the first generation is representative with " Jet-Kote ", adopting propane, propylene or hydrogen is combustion gas, oxygen is as combustion adjuvant, the handle type combustion chamber, axial powder feed, about spray efficiency 1.5Kg/h, combustion chamber and gun barrel all adopt water-cooled, and the speed of powder particle and temperature can reach 450m/s and about 2000 ℃.Second generation supersonic flame spraying method is representative with Dimaond Jet, Top-Gun and the CDS of appearance in 1989, use combustion gas and oxygen, about spray efficiency 2Kg/h, the employing wikipedia type burning that has, the employing combustion chambers burn that has, obtain particle rapidity and be about about 500m/s about 2500 ℃ of temperature.Third generation supersonic flame spraying method is representative with the JP-5000 paint finishing, these systems have high chamber pressure mostly, can produce than the higher particle rapidity of second generation HVOF spray gun, and particle's velocity can reach 600-650m/s, what have surpasses 1000m/s, and spray efficiency reaches 6～8Kg/h.Simultaneously, because high particle rapidity can make and produce compression in the coating, can prepare thicker coating.
In the existing three generations HVOF spraying method, the power in first and second generation is less than normal, and powder sending quantity is restricted, and is about 3Kg/h, causes the sedimentation rate of coating low; Particle rapidity is lower, has only about 400～500m/s, causes the overall performance of coating on the low side, and bond strength is on the low side, and porosity is higher, has limited their application.The third generation is significantly improved in design, the particle rapidity height, and coating quality is superior, and the bond strength height can reach more than the 90Mpa, and porosity is low, is about about 1%, and the coating hardness height can reach HV1490.But third generation spraying method is when WC (tungsten carbon alloy) metal-cermic coating of the tool using value of preparation HVOF, spraying particle is in the hot flame stream, be difficult to avoid WC to decompose, easily cause undue decarburization, reduce the performance of coating, and, when preparing some metals and alloy powder, coating quality is not very superior, and when spraying some oxide powder, coating quality is not high.In addition, the control system prior art before the present invention, the in fact just burner of a band monitoring.And the present invention needs be one with the corresponding intelligence control system of supersonic flame spraying method, its control system control object is many, except that fuel, oxygen, air, powder, the carrier gas that also has powder feeder to use, the cooling water that spray gun is used; Its control procedure complexity comprises conveying adjustment, powder feeding process, the cooling procedure of fuel and combustion adjuvant; The technological parameter of its monitoring is many, comprises flow, the pressure of kerosene, the liquid level of kerosene fuel tank, oxygen and compressed-air actuated flow, pressure, the going into rifle and go out rifle water temperature, pressure of spray gun combustion chamber or the like of cooling water.Therefore, many for the control object, the process complexity, the inventive method that monitoring parameter is many, the burner control system of prior art can not be finished.
Summary of the invention
At above-mentioned supersonic flame spraying method and existing technology status deficiency, the objective of the invention is to: a kind of new multifunctional supersonic flame spraying method is provided, make it both to possess third generation HVOF paint finishing coating quality height, the bond strength height, porosity is low, coating hardness height, spray efficiency advantages of higher, decomposition decarburization difficult problem when overcoming spraying WC metal ceramic powder again possesses good coating performance when making spray metal, alloy and oxide ceramics.Simultaneously, develop a kind of supporting with it multifunctional supersonic flame spraying intelligence control system, require this control system precise control, highly sensitive, effective monitoring, treatment measures are proper.Can finish the various control functions of paint finishing automatically.
Now design of the present invention and technical solution are described below:
The present invention utilizes kerosene to be fuel, oxygen and compressed air are combustion adjuvant, it is characterized in that: use intelligence control system of the present invention kerosene and oxygen (compressed air, or oxygen and compressed-air actuated gaseous mixture) with certain flow, after being mixed into combustion mixture, the atomizing of high performance atomization nozzle sprays into the spray gun combustion chamber; Gaseous mixture forms the combustion gas of HTHP after the plug ignition burning, by the Laval nozzle in the spray gun it is accelerated to supersonic speed; Powder feed system is sent the negative pressuren zone of dusty spray Laval nozzle from spray gun into supersonic jet, from the spout ejection, sprays to the surface of the work deposition at a high speed and forms coating after jet is heated acceleration.Key of the present invention is to enter speed and the temperature that the flow of kerosene, the combustion adjuvant (oxygen and compressed-air actuated mist) of spray gun is regulated flame stream by adjusting, thereby the heating and the acceleration of control dusty spray, avoid the decomposition decarburization of WC metal ceramic powder to prepare high performance metal coating, alloy coat and oxide ceramic coating.
Mode of the inventive method and technical parameter are:
Fuel and combustion adjuvant: kerosene and oxygen (state 1), kerosene and compressed air (state 2)
Combustion system: high compression combustion chamber
Atomizing type: high-performance jet atomization nozzle
Sparking mode: plug ignition
Automatic powder feeding system: radially powder feeding of Laval nozzle rear end negative pressuren zone
Powder feeding carrier gas: nitrogen
The type of cooling: refrigeration system water-cooled
Chamber pressure: (state 1) 0.7～1.0Mpa, (state 2) 0.4～0.8Mpa
Oxygen pressure: 1.2-1.6Mpa
Oxygen flow: 22～24g/s
Compressed air pressure: 0.6～1.0Mpa
Compressed air require: 22～24g/s
Kerosene pressure: 1.3～1.7Mpa
Kerosene oil flow: 1～3g/s
According to above-mentioned multifunctional supersonic flame spraying method, the present invention has designed corresponding intelligence control system.The effect of control system is various control functions such as feed adjustment, cooling, igniting, spraying, monitoring, warning of finishing fuel and combustion adjuvant according to certain procedure, whole spraying process is carried out effective intelligent monitoring, and can take measures areput.Require this system's precise control, highly sensitive, effective monitoring, treatment measures are proper.Control system of the present invention has this control circuit and control piper, and all kinds of Pressure gauges, magnetic valve and pump machanism are housed on the control piper, it is characterized in that: whole system comprises the kerosene supply, and oxygen-air is supplied with, igniting, water-cooled, five subsystems of powder feeding; Kerosene is supplied with subsystem and is made up of fuel tank, liquid level gauge, pump, flowmeter, flow control valve, liquid level gauge is converted to the signal of telecommunication with the liquid level of fuel tank, Pressure gauge and flowmeter show the pressure and the flow of kerosene respectively, control circuit and piping flow control valve by intelligence control system of the present invention are implemented Flow-rate adjustment, to finish the conveying of required kerosene; Oxygen-air is supplied with to subsystem and is made up of source of oxygen, air source, magnetic valve, oxygen regulating valve, air control valve, Pressure gauge shows bleed pressure, flow control valve is finished Flow-rate adjustment, blender is finished oxygen and is mixed with compressed-air actuated, with the conveying of finishing oxygen, air and the formation of gaseous mixture.The water-cooled subsystem is made up of refrigeration unit, pump, valve, refrigeration unit is lowered the temperature into chilled water with the high-temperature water that spray gun flows back to, pump is delivered to spray gun with the chilled water high pressure, and Pressure gauge and flow control valve show hydraulic pressure respectively and regulate flow, with the cooling of finishing spray gun and the monitoring that passes in and out the spray gun water temperature.The core component of powder feeding subsystem is a powder feeder, and it is carrier gas with nitrogen, and dusty spray and carrier gas are mixed into fluidised form, delivers to the negative pressuren zone of spray gun with certain pressure and flow, and the powder feeding rate is adjustable, to satisfy the needs of spraying coating process.The igniting subsystem is made up of transformer, igniter, ignition coil, spark plug, and during ignition system work, the secondary induction of ignition coil goes out high-tension electricity, arcing between two electrodes of spark plug, light flammable gaseous mixture, to finish the spray gun igniting of spraying incipient stage, igniting requires reliable.What parts that each subsystem is used and the connection relational table between them were understood control system implementation of the present invention is to control, install concentratedly the embodiment in console respectively.Console current collection, oil, gas, water management guarantee each subsystem by the certain time sequence operate as normal, and the running parameter in display monitoring paint finishing when work.The console circuit design security alarm circuit, when system works exceeds the normal process parameter area, can automatically report to the police, and make corresponding processing, guarantee system's operate as normal.
Description of drawings
Now the present invention and control system are described further in conjunction with the most preferred embodiment accompanying drawing:
Fig. 1: fundamental diagram of the present invention
Fig. 2: fluid piping system control principle figure of the present invention
Fig. 3: Circuits System control principle figure of the present invention
Fig. 4: console panel schematic diagram of the present invention
Above-mentioned the 1,2,3, the 4th, most preferred embodiment accompanying drawing of the present invention
Among Fig. 1, parts that each subsystem is used and the connection relational table between them are understood the embodiment of the inventive method, and what also shown control system implementation of the present invention simultaneously is the embodiment that each subsystem is controlled respectively, installed concentratedly.
Among Fig. 2,1DT blows the rifle magnetic valve, and 2DT is the oxygen magnetic valve, and 3DT is the air magnetic valve, and 4DT is an oil return solenoid valve, and 5DT is the fuel feeding magnetic valve, and t is a temperature sensor, and h is a liquid level sensor, and p is a combustion chamber pressure sensor.Each subsystem is implemented control to system by the Pressure gauge in each fluid circuit, magnetic valve, pressure regulator valve, high pressure relief device, flow control valve, flowmeter under the control of control circuit.
Among Fig. 3, the control system electrical schematic diagram comprises the annexation between various switches, intelligence instrument, magnetic valve and other components and parts.Chamber pressure p among the figure, go into rifle water temperature T 1, go out rifle water temperature T 2, kerosene liquid level H is intelligence instrument, they are monitored shown parameter, after carrying out analysis and judgement, deal with, when the operating mode of paint finishing exceeds normal range of operation, system alarm, the failure cause of prompt system, and stop spraying, and after fault is got rid of, restarting systems.Among the figure QS be battery main switch, K0 be power switch, KM0 be power supply A.C. contactor, KM (oil) for Oil pump electrical machinery A.C. contactor, K2 be gas circuit inspection, K3 be oil circuit inspection, K4 for supply water, K5 is air feed, K6 for igniting, K7 be fuel feeding, K8 for spraying, K9 for blow rifle, ET for suddenly stop, t1, t2 be that water temperature is reported to the police, h is that liquid level warning, P gas are that air pressure alarm, P water are the hydraulic pressure warning, (1-5) DT is each magnetic valve, JS relay.
Among Fig. 4, manometer and flow control valve have been installed on the console, system have respectively been controlled object show and regulate; The intelligent monitoring instrument has been installed, the running parameter of system is monitored and dealt with; The operation of system comprises the systems inspection that spraying is preceding, manually controls and control automatically two kinds of modes of operation, and in addition, system also has warning and emergency stop switch.
The specific embodiment
Working procedure of the present invention is such: check before the spray: according to checking module before the spray on the console, press corresponding switch, carry out the oil circuit inspection, gas circuit inspection and water route are checked, check whether each road work is normal.Spraying: being coated with two kinds of modes of operation, is respectively manual and automatic, when manually spraying, by the operation in tandem of water supply, air feed, fuel feeding, igniting, spraying, when spraying automatically, by the operation in tandem of lighting a fire, spraying.When spraying stops, by the operation in tandem opposite with spraying.
The present invention has compared following advantage with prior art:
1, particle flying speed height, the impact kinetic energy height, the particle associativity is good, the anchoring strength of coating height of spraying, porosity is low, the coating densification.
2, the flight time weak point of particle in atmosphere, oxide content is little in the coating.
3, particle efficiency of heating surface height, the heating same effect is good, and powder is short in the time of staying of high-temperature region, and its chemical composition and phase composition are stable.
4, the spray-on coating residual stress is little, can prepare thick coating.
5, coating hardness height, wear-corrosion resistance is good.
6, paint finishing uses kerosene and oxygen to act as a fuel, and good economy performance is safe.
7, the dusty spray particle size range is wide, spray rate height, deposition efficiency height.
8, can be used for oxygen-kerosene spraying, also can be used for air-kerosene spraying, can also under the situation that oxygen, air are supplied with simultaneously, regulate speed and the temperature that flame flows by the flow of regulating the two, to satisfy different spraying requirements.
9, system's design philosophy novelty, monitoring intelligentization, easy and simple to handle, maintaining is convenient.
The present invention has successfully designed the multifunctional supersonic flame spraying intelligence control system, has satisfied the needs of multifunctional supersonic flame spraying system.Show through spray test, the precise control of this control system, highly sensitive, intelligent degree height, workable, and meet the ergonomics requirement, Control System Design thought also can be used in other relative combustion field.The present invention and multifunctional supersonic flame spraying spray gun are supporting, can prepare metal, alloy, metal-cermic coating, coating quality is superior, the bond strength height, porosity is low, the hardness height, and wear-corrosion resistance is good, can be widely used in wear-resistant, anti-ly ablate, fields such as occasion, particularly Aero-Space, electric power, iron and steel, chemical industry, automobile such as anti-impact erosion, heat-resisting, parts reinforcement.Simultaneously because the coating quality height, and use kerosene to be fuel, oxygen, compressed air are combustion adjuvant, compare with other HVAF, the fuel combustion supporting agent is cheap, have the very high ratio of performance to price,, in industrial or agricultural, have broad application prospects producing huge economic benefit, social benefit and military benefit.
Claims (4)
1, a kind of multifunctional supersonic flame spraying method utilizes kerosene to be fuel, and oxygen and compressed air are combustion adjuvant, it is characterized in that: fuel and combustion adjuvant with certain flow, are sprayed into the spray gun combustion chamber after the spraynozzle atomizing is mixed into combustion mixture; Gaseous mixture forms the combustion gas of HTHP after the plug ignition burning, by the Laval nozzle in the spray gun it is accelerated to supersonic speed; Powder feed system is sent the negative pressuren zone of the Laval nozzle of dusty spray from spray gun into supersonic jet, from the spout ejection, sprays to the surface of the work deposition at a high speed and forms coating after jet is heated acceleration; Combustion system is a high-pressure combustion; Atomizing type is a jet atomization; Sparking mode is a plug ignition; Automatic powder feeding system is the radially carrier gas powder feeding of Laval nozzle rear end negative pressuren zone; The type of cooling is the refrigeration system water-cooled.
2, a kind of multifunctional supersonic flame spraying method according to claim 1, enter speed and the temperature that the flow of fuel, the combustion adjuvant of spray gun is regulated flame stream by adjusting, thereby the heating and the acceleration of control dusty spray, it is characterized in that: chamber pressure is 0.7～1.0Mpa or 0.4～0.8Mpa; Oxygen pressure is 1.2～1.6Mpa; Oxygen flow is 22～24g/s; Compressed air pressure is 0.6～1.0Mpa; Compressed air require is 22～24g/s; Kerosene pressure is 1.3～1.7Mpa; Kerosene oil flow is 1～3g/s.
3, a kind of intelligence control system of according to claim 1 and the supporting design of multifunctional supersonic flame spraying method, have control circuit and control piper, Pressure gauge, magnetic valve and pump machanism are housed on the control piper, it is characterized in that: whole system comprises kerosene supply, oxygen-air supply, igniting, water-cooled, five subsystems of powder feeding; Kerosene is supplied with subsystem and is made up of fuel tank, liquid level gauge, pump, flowmeter, flow control valve; Oxygen-air is supplied with subsystem and is made up of source of oxygen, air source, magnetic valve, oxygen pressure regulator valve, air pressure regulator valve; The water-cooled subsystem is made up of refrigeration unit, pump, valve; The core component of powder feeding subsystem is a powder feeder, with certain pressure and flow dusty spray and carrier gas is mixed into the negative pressuren zone that fluidised form is delivered to spray gun with carrier gas; The igniting subsystem is made up of transformer, igniter, ignition coil, spark plug.
4, the intelligence control system of the according to claim 3 and supporting design of multifunctional supersonic flame spraying method is characterized in that: the annexation between each system is carried out and is controlled respectively, installs concentratedly; Console current collection, oil, gas, water management, the control circuit system comprises switch, A.C. contactor, magnetic valve, warning circuit; The control fluid piping system comprises Pressure gauge, magnetic valve, pressure regulator valve, high pressure relief device, flow control valve, flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01128773 CN1115203C (en) | 2001-08-31 | 2001-08-31 | Multifunctional supersonic flame spraying method and its intelligent control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01128773 CN1115203C (en) | 2001-08-31 | 2001-08-31 | Multifunctional supersonic flame spraying method and its intelligent control system |
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| CN1342525A CN1342525A (en) | 2002-04-03 |
| CN1115203C true CN1115203C (en) | 2003-07-23 |
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| CN 01128773 Expired - Fee Related CN1115203C (en) | 2001-08-31 | 2001-08-31 | Multifunctional supersonic flame spraying method and its intelligent control system |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI114854B (en) * | 2003-02-11 | 2005-01-14 | Liekki Oy | A method of supplying liquid to a flame spraying apparatus |
| CN100351420C (en) * | 2005-11-17 | 2007-11-28 | 广州有色金属研究院 | Method for supersonic flame spraying crystallizer brass plate |
| CN101736279B (en) * | 2008-11-05 | 2012-07-18 | 沈阳黎明航空发动机(集团)有限责任公司 | Hypersonic flame spraying process for self-lubricating wear-resistant coating |
| US9062354B2 (en) * | 2011-02-24 | 2015-06-23 | General Electric Company | Surface treatment system, a surface treatment process and a system treated component |
| CN102212776A (en) * | 2011-05-24 | 2011-10-12 | 江苏金石油气井口科技有限公司 | Method for spraying wolfram carbide alloy on seal surface of valve plate (seat) at supersonic speed |
| CN102903943B (en) * | 2012-10-18 | 2014-09-24 | 浙江科技学院 | Preparation technology and used equipment for catalyst layer of proton exchange membrane fuel cell |
| CN103521379A (en) * | 2013-10-21 | 2014-01-22 | 芜湖鼎恒材料技术有限公司 | Quantitative control type supersonic speed processing device |
| ITBO20130619A1 (en) * | 2013-11-12 | 2015-05-13 | Ibix Srl | METHOD AND EQUIPMENT FOR FLAME SPRAYING OF THERMOPLASTIC POWDERS |
| CN104233176B (en) * | 2014-09-12 | 2017-01-11 | 芜湖鼎瀚再制造技术有限公司 | Supersonic flame spraying system |
| CN104233177B (en) * | 2014-09-12 | 2016-08-24 | 芜湖鼎瀚再制造技术有限公司 | A kind of supervisory circuit of HVAF control system |
| CN104498862B (en) * | 2015-01-04 | 2017-01-25 | 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 |
| CN105256269A (en) * | 2015-11-11 | 2016-01-20 | 无锡清杨机械制造有限公司 | Spraying method |
| CN117626163B (en) * | 2024-01-25 | 2024-06-07 | 成都飞机工业（集团）有限责任公司 | Safety spraying control system and control method for conductive aluminum layer on surface of composite part |
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2001
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