Zhengzhou Lijia HV-80M internal hole spray gun is a high-performance thermal spraying equipment, suitable for multi-field internal hole surface treatment. It is based on thermal spraying technology, fuel and oxygen are mixed in the combustion chamber to produce high temperature and high pressure flame, the spraying material is melted by the flame under the carrier gas transportation, and then sprayed to the inner hole of the workpiece at high speed, and the key parameters of the spray gun and the selection of appropriate materials can accurately control the coating performance. The gun body is made of special materials, high temperature resistance, good heat dissipation, stable structure, unique combustion chamber design, radial powder feeding to melt the material, good covering effect, and can also meet different hole types by changing the connector angle. Technically, it is suitable for all kinds of powders, and the thickness can be increased many times, the particle flight speed is fast, the combustion chamber pressure is high, and the spraying quality is excellent.
1.Structural advantages: The gun body is made of special materials, with high strength, high temperature resistance, good heat dissipation, long-term stable operation, compact internal structure, and stable connection of components. The combustion chamber borrows the principle of rocket engine, and the radial powder feeding makes the powder evenly distributed and fully melted in the flame, and improves the efficiency and quality of coating coverage. The angle between the connector and the axial direction can be changed, 90 degrees for through holes, small angles (such as 60 degrees, 45 degrees) for blind hole spraying, and a wide range of applications.
2.Performance parameter advantages: Particles fly at speeds of up to 1100 m/s, far exceeding comparable HVOF systems, with high spraying efficiency, short time-consuming, high coating bond strength and low porosity.
3.Advantages of spraying effect and material adaptation: Adapt to a variety of metals, ceramics and cermet powders, meet different thickness requirements for many times, and accurately control the coating performance. The patented kerosene atomization nozzle and combustion chamber are used to burn without carbon deposit, and the barrel does not stick when spraying low melting point alloys or small particle size powders. The cooling system is perfect, the cooling is sufficient, and it supports continuous long-term work, reduces equipment loss, and improves efficiency.
The appearance of the spray gun is smaller, suitable for spraying the inner hole with a diameter of 45-60mm, the fuel used: oxygen, kerosene, hydrogen, nitrogen, carrier gas, the spray gun is innovative, and has obtained the invention patent.
The flame direction of the nozzle is designed to be angled, and the flame of the spray gun can be directly perpendicular to the internal surface of the workpiece.
Two rotation modes: (1) the spray gun does not move, the workpiece rotates, (2) the spray gun rotates, the workpiece does not move.
The main body of the spray gun can be made of lightweight high-temperature resistant material as an extension rod, and the extension rod can be customized with a range of 0.6-3 meters
The spray gun is equipped with a full closed-loop control system and adopts a mass flow controller to ensure the stability of spraying.
Project | Parameter
| |
HV-80M kerosene supersonic flame inner hole spray gun
| Recommended spray inner | 45-60mm |
Gun body length | Standard 600mm, can be customized, up to 3000mm | |
Flame speed | 2000m/s | |
Flame temperature | 3000℃ | |
Spray rate | 0.5-1.5kg/h(tungsten carbide) | |
Coating porosity | ≤1% | |
Coating bonding strength | > 60Mpa | |
Spray powder particle size | 1~9μm,2~10μm | |
Cooling method | Water cooling | |
Cooling water flow | 1.3m³/h |
1.Machinery manufacturing: It can spray the inner hole of mechanical parts such as hydraulic cylinder barrel and gear shaft hole to improve wear resistance and seizure resistance, prolong the life of parts, and reduce equipment maintenance costs and downtime.
2.3Automobile industry: It can spray the surface of the inner hole of the automobile engine cylinder barrel and piston ring groove to enhance wear resistance, corrosion resistance and heat dissipation, improve engine performance and reliability, and reduce fuel consumption and exhaust emissions
3.Aerospace: It is suitable for the surface strengthening of key components such as the tongue and groove of the turbine blades and the inner hole of the landing gear of the aircraft engine, enhance the high temperature resistance, wear resistance and fatigue resistance, ensure the safe and stable operation of the engine, and improve the reliability and life of the aircraft.
4.Petrochemical industry: Spraying drilling pump cylinder liners and reactor bores in petroleum exploitation and chemical production equipment to improve corrosion resistance and erosion resistance, resist medium erosion and erosion, prolong equipment life, reduce replacement frequency and reduce costs.
5.Mold manufacturing: Spraying the surface of the inner hole of the mold such as the core hole of the injection mold and the cavity hole of the die-casting mold to improve the hardness, wear resistance and release of the mold, reduce the coefficient of friction, reduce the adhesion, and improve the life and production efficiency of the mold
1.Equipment inspection: Check whether the spray gun is damaged or deformed, the parts should be firmly connected, the powder feeding system should be smooth, the powder should be sufficient, there should be no moisture agglomeration, the coolant of the cooling system should be sufficient, the water pipe should be no problem, and the circulating pump should operate normally.
2.Material preparation: Select suitable materials according to spraying needs, such as specific metals, ceramic powders, etc., and mix appropriate additives according to the process to ensure stable performance.
3.Environmental preparation: The operating environment should be well ventilated, clean up debris, prevent dust accumulation and foreign body interference, and ensure the respiratory health of personnel.
4.Safety protection: Operators wear protective glasses, masks, and high-temperature resistant gloves, and do not touch spray guns, workpieces and high-temperature parts.
5.Process monitoring: Pay attention to the operation of the spray gun, and check the corresponding problems when the temperature of flame, powder and cooling water is abnormal.
6.Spraying environment: Keep the environment clean, and prevent moisture from materials and equipment when wet.
7.Equipment maintenance: After operation, turn off the system and power supply, clean up the residue of the spray gun, especially the nozzle, regularly maintain the system, and replace the wearing parts.
Q1: How do I check if the spray gun is working properly?
A: It is necessary to comprehensively check the appearance of the spray gun, whether there is damage or deformation caused by bumps, and ensure that the parts are tightly connected and not loose. Check the powder feeding system to see that the amount of spraying material in the powder barrel should be sufficient, and there should be no damp hardening and agglomeration, so as to ensure smooth powder transportation. Carefully check the cooling system, the coolant should be sufficient, the water pipe should not leak or bend, and the circulating pump can start and run normally.
Q2. How to choose the right coating material?
A: According to the specific spraying needs, if you pay attention to wear resistance, you can consider high-hardness metal powder; If high temperature resistance and corrosion resistance are required, ceramic powder is more suitable. At the same time, it is necessary to pay attention to the particle size of the material, fine-grained powder is conducive to the formation of a smoother coating, and coarse-grained powder may enhance the adhesion of the coating, which needs to be weighed according to the actual working conditions and coating requirements.
Q3. What are the specific requirements for the operating environment?
A: The operating environment must be well ventilated to avoid the accumulation of dust from spraying, prevent the risk of explosion, and protect the respiratory health of the operator. Clean up the operation area in advance, remove irrelevant debris, keep the site tidy, and prevent foreign objects from entering the spray gun or interfering with the spraying process.