The Design On Specified Plasma Small Diameter Spraying System

The plasma spraying device is growing towards the huge power, the purpose of which is to obtain a high quality of painting and improve the efficiency of work. The spraying system mentioned here is a small power system and aimed at the wall of aluminum cylinder whose diameter is above 40mm.To deal with the wearing and eroding, small power engine centers on the chrome plate .The liquor of chrome plate is constituted by CrO₃ which is easy to oxidate, it will be harmful for the health and the environment; it is one of the substances which can cause the cancer. Things will be different if we introduce the thermal spraying instead of chrome plate. It will decrease the damage to the human and environment.The wall of engine cylinder needs the performance that is anti-wearing and anti-eroding. The molybdenum metal alloy has a high quality of anti-wearing and the skill of lubrication. Choosing it as the spraying material to the wall of engine cylinder can achieve not only the demand of the wall of cylinder, but also can avoid the damage to human and the air; at the same time, it will simplify the skill to manage the wall of aluminum armor cylinder.The power supply used for plasma mainly centres on the silicon commutating the saturation electricity anti-machine power supply and silicon-controlled power supply and direct current generator power supply. In this text we designed a type power supply which has abrupt declination to output characteristic of going against to change power supply as to plasma spraying. As to the choice of the main electric circuit topological structure and variable frequency device, rectified filter circuit, and the rectified output diode, we put forward a concrete project.Using the PLC programmable controller to the craftwork of the plasma spraying makes the sprays system brief and easy, plait distance conveniente, particularly to the check and modification the procedure easy, work credible, and the ability of anti-interference is better.According to the basic request of body design of the plasma gun, to make an improvement to the original gun body structure, based on the plasma gun with main characteristics of stingy body discharge (change a pair of roads to enter spirit for the single road enter spirit), single anode, powder sent inside.