Non-clogging Pump Impeller Groove Design
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Solution Overview
Problem
Conventional submersible pumps face issues with low passage performance due to foreign matter getting stuck in the impeller's vane spaces, leading to potential clogging, especially with longer debris.
Innovation Solution
The design incorporates a central protruding portion and groove structure between the vane and central protruding portion, creating a clear flow path that prevents foreign matter from getting stuck and enhances passage performance by adjusting groove depth and width for efficient water flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a vacant space having a circular shape is provided on the inner peripheral side of the vane portion, then the impeller structure is simple, but foreign matter stays in the space and gets caught in a U-shaped bent form causing clogging
Solution Approach 1:
The impeller is segmented into multiple functional zones: the central protruding portion, the groove portion, and the vane portion. This segmentation creates distinct flow paths that guide foreign matter from the suction port through the groove to the discharge port, preventing accumulation in any single area and eliminating the U-shaped bending problem.
Solution Approach 2:
The groove portion acts as an intermediary flow path between the suction port and the vane portion. It receives foreign matter from the suction port and transports it to the discharge port, serving as a mediator that prevents foreign matter from directly contacting and getting caught by the vane portion's inner peripheral end.
2Reliability
If foreign matter is allowed to pass through the impeller, then passage performance improves, but foreign matter may get caught in the vane portion causing clogging
Solution Approach 1:
The groove portion is designed to preliminarily capture and guide foreign matter before it can reach the vane portion. By providing this preliminary flow path, foreign matter is directed toward the discharge port before it has an opportunity to get caught in the vane portion's inner peripheral end, preventing clogging before it occurs.
Solution Approach 2:
The groove portion extends in the radial direction from the central protruding portion to the outer periphery, creating a three-dimensional flow path structure. This dimensional approach allows foreign matter to be transported along the groove's length and depth, providing a clear escape route that avoids the two-dimensional trapping zone at the vane's inner peripheral end.
Data Source
AI summary
A non-clogging pump (100, 200, 300) includes: a pump casing (3); an impeller (4, 204) including a main plate portion (41), a vane portion (43), and a central protruding portion (42); and a rotating shaft (1), in which an end portion (431) on an inner peripheral side of the vane portion (43) is connected to an outer periphery of the central protruding portion (42) when viewed from the suction port (33a) side, and the impeller (4, 204) is provided with a groove portion (45) extending from an inner peripheral side to an outer peripheral side of the impeller (4, 204), between the central protruding portion (42) and the vane portion (43), when viewed from the suction port (33a) side.