High temperature and wear resistant graphite rotor

Key features:

- High-Temperature Resistance: Graphite has a high melting point of 650°C, which makes graphite rotors resistant to temperatures far exceeding the operational limits of many applications. Even if it works for a long time in a high-temperature environment, there will be no structural or performance changes.

- Wear Resistance: Graphite rotors are self-lubricating and resistant to wear. The layered structure of the graphite grains within this material contributes to its low coefficient of dynamic friction (COF), which ranges from about 0.10 to 0.5. This property, along with the ability of graphene layers to slide over each other and deposit a burnished film between the graphite and its counter face, optimizes dry wear resistance.

- Self-Lubricating: Graphite rotors are self-lubricating, meaning they do not require constant application of oil or grease lubrication. This is particularly beneficial in severe conditions where most lubrication would likely burn up shortly after being applied.

- High Thermal Conductivity: Graphite can dissipate heat from locations such as the interface between a bearing and a shaft due to its high thermal conductivity. This helps prevent bearing friction from creating localized hot spots in an already hot environment that ultimately degrades bearing performance.

These unique properties make graphite rotors an essential component for efficient and reliable operations in various applications, such as the degassing of aluminum alloys⁵ and in vacuum pumps.

High-temperature and wear-resistant graphite rotors have a wide range of applications due to their unique properties. 

1. Aluminum Alloy Smelting: Graphite rotors are critical components used in aluminum alloy smelting equipment, playing a vital role in the degassing and fluxing operations of the smelting process. They are designed to withstand high temperatures and harsh chemical environments, making them essential for efficient and effective aluminum degassing.

2. Automotive Applications: In the automotive industry, graphite rotors are widely recognized for their exceptional heat dissipation capabilities, which contribute to improved braking performance, reduced wear and tear, and overall enhanced safety.

3. Power Generation and Industrial Sectors: Graphite rotors have revolutionized power generation and industrial sectors by offering efficient and cost-effective solutions. Their ability to withstand high temperatures and resist corrosion makes them ideal for use in turbines, compressors, and various heavy machinery applications.

4. Vacuum Pumps: Graphite rotor vanes are highly corrosion-resistant and non-reactive to most acids, gases, and other corrosive chemicals that are commonly present in pumps’ working processes. It ensures the service life and reliability of rotor blades in various industrial environments.

5. Metallurgical Applications: It is used to make high-temperature crucibles and graphite saggers in smelting, wear-resistant components in the mechanical industry, graphite electrodes for electrolysis and chemical industry, advanced refractory materials and coatings in metallurgical industry.