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The high-efficiency supersonic plasma spray gun scientifically applies the single-anode Laval nozzle technology to obtain a supersonic plasma jet with high energy density and high stability at low energy consumption. The jet acceleration scheme is mainly based on mechanical compression and supplemented by aerodynamic compression. Relying on the strong compression effect on the initial section of the arc to force the anode spot to move forward to elongate the arc, the acceleration of the arc section is realized, which breaks through the traditional double anode structure to gradually elongate the arc and accelerate the flame flow area.
It adopts the structure design of internal powder feeding and dual temperature zone, which can directly send the sprayed powder to different temperature zones of plasma flame flow, which not only effectively improves the utilization rate of plasma arc heat energy and improves the coating deposition rate compared with the current general external powder feeding method at home and abroad, but also solves the technical problem of easy gag of ordinary internal powder feeding spray gun, and can prepare oxide ceramic coating with high melting point, cermet coating and self-melting alloy coating with low melting point, and can also prepare carbide coating that is easy to lose carbon at high temperature. The gun is compact and lightweight, with a small weight-to-power ratio (G/W), which is easy to assemble and adjust; Stable performance, long service life of electrodes and nozzles, strong maintainability, easy replacement of wearing parts; Motorized and manual operation are easily interchangeable, and there is no need to change the gun mount.
The main gas is argon and the auxiliary gas is hydrogen.
l The spray gun provides the following accessories: nozzles, powder feeding tubes and powder feeding racks, water cables, electrode heads, insulators, sealing rings, special tools, etc. This type of spray gun is used for production thermal spray operations and can work continuously for long periods of time.
Project | Parameter |
Spraying power | 60-100KW |
Max. operating voltage | 180 V |
Maximum operating current | 650 A |
Flow of main gas Ar | 100-200 l/min |
Flow of secondary gas H2 | 0-25 l/min |
Flow of pulverized gas N2 | 6-12 l/min |
Particle velocity, particle velocity | 240-800m/s |
Protection of key engine components: The plasma supersonic spray gun can be sprayed with nano zirconia, alumina and other ceramic coatings, which are used for thermal barrier protection of high-temperature components such as turbine blades and combustion chambers, significantly improving their high temperature resistance and oxidation resistance
Protection of thermal power generation equipment: In thermal power plants, plasma supersonic spraying is widely used for the wear-resistant and anti-corrosion of the "four tubes" of boilers (water wall, superheater, reheater, and economizer), as well as the repair and strengthening of the joint surface of the cylinder head of the steam turbine and the impeller of the exhaust fan.
Strengthened engine components
The wear resistance of key components such as automobile engine crankshafts, synchronous rings, and piston rings has been significantly improved after supersonic plasma spraying.
Corrosion-resistant coating: The steel structure of chemical storage tanks and offshore platforms is treated with aluminum spray sealer, and the anti-corrosion life can reach more than 15 years, which is far better than the traditional paint process
Biomedical applications: Hydroxyapatite (HA) coatings are deposited on the surface of metal implants by plasma supersonic spraying technology, and have been successfully applied to artificial bones and joints in more than 200 clinical cases, showing good biocompatibility and wear resistance
Paper & Printing Machinery: Dryers and anilox rollers are coated with stainless steel or ceramic to reduce the coefficient of friction and prevent slurry from sticking, extending equipment life
Textile & Chemical Fiber Equipment: Rollers, guide wire hooks and other components are sprayed with Al₂O₃ wear-resistant coatings, which significantly reduce fiber friction damage and improve production efficiency
Gas supply system: ensure that the purity of argon (Ar), nitrogen (N₂) or hydrogen (H₂) is ≥ 99.99%, and the air pressure is stable at 0.5-0.8MPa; The compressed air is dried and filtered for cooling and powder feeding at a pressure of 0.4-0.6MPa.
Cooling system: circulating water temperature ≤ 35°C, flow rate ≥ 15L/min, check that there is no leakage in the pipeline, and the water conductivity < 10μS/cm (deionized water is recommended).
Power supply system: Connected to three-phase 380V±10% power supply, ground resistance <4Ω, to ensure stable power supply to the voltage regulator or UPS.
Working environment: The spraying chamber needs to be equipped with a high-efficiency dust removal system (filtration efficiency ≥99%), and the ventilation rate ≥ 500m³/h; The humidity < 70% to avoid the risk of explosion caused by dust accumulation.
Q: What kind of support do you need for equipment installation and commissioning?
A: Provide Chinese and English installation manuals, water and electricity connection diagrams, can send engineers to guide the installation on site (appointment required, travel expenses are borne by customers), support remote video debugging and free operation training (1-2 technicians), free process parameter database.
Q: How about the payment method and delivery cycle?
A: The standard terms are 30% advance payment (T/T), 70% payment before shipment, support letter of credit, installment payment (need to evaluate credit qualification). 7-10 working days for spot orders and 4-6 weeks for custom orders.
