Centrifugal Pump Cutting Head Profiled Blades Clogging Prevention

The patent extracts the flow-generation function from the cutting head structure by removing the ribs and instead using the impeller blades themselves to generate the necessary partial flow. This separates the cutting function (performed by the cutting head) from the flow generation function (performed by the impeller blades), thereby preventing clogging without adding structural complexity to the cutting head.

Instead of adding elements (ribs) to the cutting head to generate flow, the patent inverts the approach by using the existing impeller blades to perform the flow-generation function. The impeller blades are designed with specific characteristics (number, arrangement, profile) to generate partial flow that prevents admixture deposition, thereby solving the clogging problem without modifying the cutting head structure.

The patent merges the shredding function with the main impeller by designing the impeller blades to perform both pumping and shredding functions. The impeller blades are configured to interact with solid matter in the pumped liquid, shredding it while conveying it forward. This eliminates the need for a separate pre-shredder device, thereby maintaining productivity while reducing device complexity and eliminating additional blockage risks.

The impeller is designed as a multi-functional component that simultaneously performs pumping, shredding, and flow generation functions. The impeller blades are specifically designed to handle solid matter by shredding it while maintaining the pumping action, thereby making the single component universal and eliminating the need for separate dedicated shredding equipment.

The patent applies local quality by designing the impeller blades with varying characteristics at different locations. The blades have specific profiles, thickness variations, and angles optimized for their local position to maintain effective cutting interaction with the cutting head while minimizing adverse flow effects and energy losses. This localized optimization allows the cutting edges to remain effective without compromising overall power balance.

The patent introduces dynamics by designing the impeller blades with three-dimensional profiles that vary along their length and radius. The blades are not simple flat plates but have complex curved surfaces that adapt to the local flow conditions and cutting requirements at different positions, thereby maintaining cutting effectiveness while optimizing flow transition and energy efficiency throughout the impeller disk.