The graphite rotor for vacuum pump is made of high purity graphite, and the structure of the nozzle, in addition to considering that the air bubbles should be broken up, also uses the centrifugal force generated by stirring the aluminum alloy melt to make the melt enter the nozzle and mix evenly with the gas ejected horizontally, forming a gas/liquid flow to eject, increasing the contact area and contact time between the air bubbles and the aluminum alloy liquid to improve the degassing and purification effect.
The rotational speed of the graphite rotor of the vacuum pump can be steplessly adjusted by frequency converter speed control. The graphite rotor for high purity antioxidant vacuum pump has the characteristics of high strength, high temperature resistance and aluminum flow corrosion resistance. In the purification and degassing process, the surface of aluminum alloy liquid inside the box is protected by nitrogen gas cover, so that the part of the graphite rotor for vacuum pump exposed to aluminum alloy liquid is in inert gas to prevent the rotor from high temperature oxidation and prolong the service life of the rotor.
The surface of the graphite rotor for vacuum pump is treated with special anti-oxidation treatment, and the service life is about 5 times that of ordinary products, which is widely used in aluminum alloy casting industry.