Arched Aluminum Filter for Diaphragm Pump Dust Conveying
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Solution Overview
Problem
Existing diaphragm pumps for conveying dusts, such as coal dust, face challenges in achieving uniform gas distribution and pressure resistance while maintaining filter fineness and complexity in production, leading to issues like smearing and non-uniform porosity, which affect the conveying efficiency and availability.
Innovation Solution
A diaphragm pump with an arched, three-dimensionally shaped filter element made of porous metal, ensuring uniform porosity and preventing dust invasion, combined with a design that minimizes dead volume and allows for reversible deformation of the diaphragm, enabling efficient gas distribution and reduced production complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If flat or plate-type filter structures are used, then pressure resistance and temperature resistance are achieved, but filter fineness is compromised and mechanical processing to other geometric shapes is not possible
Solution Approach 1:
The patent applies curvature by transforming the flat filter plate into an arched, three-dimensionally shaped filter element. This curved geometry allows the filter to maintain structural strength while enabling uniform porosity distribution and preventing dust particle invasion during diaphragm relaxation. The arched shape also facilitates better interaction with the diaphragm movement pattern.
Solution Approach 2:
The patent transitions from a two-dimensional flat filter structure to a three-dimensional arched filter element. This dimensional change enables the filter to achieve both the required mechanical strength and uniform porosity distribution, while also allowing mechanical processing to the required geometric shape without compromising filter fineness.
2Shape
If mechanical processing is applied to achieve arched shapes, then geometric shape requirements are met, but the porous filter structure is damaged or smeared
Solution Approach 1:
The patent changes the manufacturing approach by using casting processes instead of mechanical processing. This parameter change in the manufacturing method allows the porous filter structure to be formed in the required arched geometry without mechanical contact that would cause damage or smearing, thereby maintaining both shape requirements and structural integrity.
3Reliability
If non-uniform porosity occurs in the filter element, then dust particles can invade during relaxation, but uniform gas distribution cannot be achieved
Solution Approach 1:
The arched, three-dimensional shaping of the filter element creates a uniform distribution of porosity throughout the structure. This curved geometry ensures that during diaphragm relaxation, dust particles cannot invade the loosening face, while also enabling uniform gas distribution during the pressurizing procedure.
4Ease of operation
If the diaphragm chamber contour is not adapted to diaphragm deflection, then diaphragm wear increases, but dead volume increases
Solution Approach 1:
The patent applies local quality by adapting the diaphragm chamber contour specifically to match the diaphragm deflection pattern. This localized geometric adaptation ensures uniform and reversible diaphragm deformation with ideally low wear, while minimizing dead volume in the dust chamber.
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
The solution achieves a high conveying rate with minimal gas loss and reduced wear, ensuring continuous operation with low complexity and high diaphragm availability by ensuring uniform gas distribution and maintaining filter integrity.
Implementation Method 1
the gas-permeable loosening face (5)
Implementation Method 2
the finest dust particles cannot invade the loosening face during the relaxation procedure
Data Source
AI summary
A diaphragm pump for fluidizing, pressurizing, and conveying products in the form of dust, such as coal dust, using inert gas having pressures of up to 7 MPa has a porous, arched aluminum loosening element and optionally a dual diaphragm. The diaphragm pump ensures that fluidizing gas is supplied and distributed uniformly in the dust pump lower region, and the contour of the dust chamber may be adapted to the deflection of the diaphragm and possibly to the guide rod of the diaphragm. Uniform and reversible deformation of the diaphragm with as little wear as possible is thereby achieved. After the discharge operation of the diaphragm pump has ended, largely planar contact of the diaphragm on the arched, half-shell-shaped loosening surface and a small dead volume can be achieved, leading to a minimal dust chamber volume together with a high delivery rate and a small high-pressure gas loss.