The flow rate of a screw pump is linearly related to its rotational speed. Although high-speed screw pumps can increase flow and head, the power consumption significantly increases. High rotational speeds accelerate wear between the rotor and stator,  to premature wear of the screw pump. Moreover, the short length of the rotor and stator in high-speed screw pumps makes them particularly susceptible to wear, thereby shortening the pump's service life. To extend the lifespan of the screw pump, it is essential to enhance the wear resistance of the rotor and stator.

Solution: Conduct a comprehensive inspection and assessment of the rotor and stator to determine the areas and extent that require repair. Timely repairs with wear-resistant materials will enhance their durability. The worn rotor and stator can be repaired using thermal spraying techniques, such as plasma or flame spraying, with agglomerated ceramic powders made from metal oxides. After the coating cools, specialized tools and techniques are used for machining, grinding, and polishing the rotor and stator. Finally, rigorous testing and inspection of the repaired components are carried out to ensure their performance and quality meet the required standards.

The coatings made from agglomerated powders of metal oxides exhibit wear resistance against abrasive wear, hard surface wear, corrosive wear, and cavitation wear. Repairing the rotor of the screw pump with these coatings can significantly enhance its wear resistance and extend its service life.