Stirring Body Aperture Positioning for Liquid Circulation Efficiency
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Solution Overview
Problem
Existing devices for circulating wastewater in tanks consume relatively low electrical energy but have room for efficiency improvement to save more energy.
Innovation Solution
The geometric center of gravity of the aperture area is positioned between the centerline and transport ribs, with transport ribs curving towards the shaft and apertures extending radially, increasing efficiency by optimizing the arrangement and shape of the stirring body.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the aperture area is positioned at the centerline of the stirring body, then the structure is symmetric and simple to manufacture, but the energy efficiency is suboptimal
Solution Approach 1:
The patent applies asymmetry by deliberately positioning the aperture area not at the centerline but shifted toward one of the two transport ribs. This asymmetric arrangement optimizes the interaction between the aperture and transport ribs, improving energy efficiency by enhancing liquid circulation patterns while maintaining manufacturing simplicity through a clear geometric definition of the shifted position.
2Use of energy by moving object
If the transport ribs are straight and uniform, then the manufacturing is simple, but the efficiency of the stirring body is reduced
Solution Approach 1:
The patent applies curvature by defining transport ribs that are not straight but have a specific curved profile. The ribs are designed to be convexly curved when viewed from the upper side of the stirring body, which optimizes their hydrodynamic performance and interaction with the aperture area, thereby improving energy efficiency while remaining manufacturable through standard forming processes.
3Productivity
If the aperture area is elongate in the radial direction with greater width at the peripheral edge, then the liquid circulation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The patent applies local quality by defining an aperture area with non-uniform width distribution along its radial extension. The aperture is elongate in the radial direction with greater width at the peripheral edge and smaller width near the shaft, creating optimized local flow characteristics at different positions. This graduated geometry improves liquid circulation efficiency while using clear geometric definitions that facilitate manufacturing.
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 configuration significantly enhances the energy efficiency of the device, with additional improvements from the combination of aperture and transport rib designs, leading to enhanced energy savings.
Implementation Method 1
a device for circulating a liquid received in a container
Implementation Method 2
circulate the wastewater received in the tank
Data Source
AI summary
A device for circulating a liquid received in a container, in particular for circulating wastewater received in a tank, has a hyperboloid-like or truncated cone-like stirring body mounted on a vertical shaft, wherein a plurality of transport ribs extending from the peripheral edge in the direction of the shaft are provided on an outer side of the stirring body, a centerline between two adjacent transport ribs is defined by points of equal minimum distance from each crest line of the two adjacent transport ribs, an aperture is provided in the stirring body between the two transport ribs, and an aperture area delimited by the edge of the aperture has a geometric center of gravity. The geometric center of gravity of the aperture area is disposed in a region between the centerline and the crest line of one of the two transport ribs.