Drainage Pump Blade Water Flow Regulation
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Solution Overview
Problem
Existing drainage pumps generate noise due to turbulent water flows and bubble mixing at the corners of the rotating blades, leading to vibrations and increased noise levels, which are not adequately addressed by current designs.
Innovation Solution
The introduction of a water flow direction regulation portion on the outer circumferential side of the rotating blade, specifically designed to align water flow vectors and prevent turbulence, using cylindrical or eggplant-shaped features to guide water flows and minimize vector variations at critical corners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional rotating blade design is used, then pump structure is simple, but turbulent water flows and bubble mixing occur at blade corners causing noise and vibration
Solution Approach 1:
The rotating blade is divided into multiple functional regions: a leading edge portion, a trailing edge portion, and corner portions connecting them. Each region is designed with specific curvature characteristics to control water flow separately, preventing turbulence at the corners while maintaining overall blade functionality.
Solution Approach 2:
Different portions of the blade are given different geometric properties. The leading edge has a specific curvature radius, the trailing edge has a different curvature radius, and the corner portions have optimized curvature to guide water flow smoothly. This local differentiation eliminates turbulence without requiring complete redesign of the entire blade.
2Object-affected harmful factors
If blade corners are rounded to reduce turbulence, then noise is reduced, but blade strength and structural integrity may be compromised
Solution Approach 1:
The blade corners are designed with optimized curvature radii that balance flow smoothness and structural strength. The curvature is sufficient to guide water flow smoothly and prevent turbulence, yet maintains adequate material thickness and geometric strength to preserve blade integrity under operational loads.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design suppresses turbulence and bubble mixing, resulting in reduced noise generation and enhanced quietness during operation by ensuring water flows have consistent vector directions, thereby minimizing noise and vibration.
Implementation Method 1
turbulent water flows are generated, the surrounding air becomes bubbles and is mixed thereinto
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3A~3E
AI summary
[Object] Provided is a drainage pump which achieves a further improvement in quietness during an operation. [Solving Means] A rotating blade (50) used in a drainage pump (1) includes: large-diameter blades (60) provided with paddle surfaces (61) formed in a plurality of plate shapes extending in a radial direction from a shaft portion (52) connected to an output shaft of a motor; a plurality of plate-shaped small-diameter blades (54) connected to lower end edge portions of the large-diameter blades (60); and auxiliary blades (70) which are provided with paddle surfaces (71) and are provided between the adjacent large-diameter blades (60). Hitherto, water scraped by the paddle surfaces (61) and (71) of the large-diameter blades (60) and the auxiliary blades (70) becomes a water flow in a yz direction by an upper edge portion (62) and a water flow in an xy direction by a side edge portion (63), and the water flows collide with each other at rear surfaces of the paddle surfaces, generate turbulence, and cause noise. However, the water flows can be suppressed to become water flows in the xy direction by a water flow direction regulation portion (101), and the generation of turbulence is suppressed by the collision of the water flows. Therefore, the generation of noise can be prevented.