Rectifying Module with Stacked Mesh Members for Flow Uniformity
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Solution Overview
Problem
Existing flow meters require complex assembly operations and lack advanced rectifying effects due to the separate installation of mesh and spacer elements, which complicates the process and does not effectively suppress flow disturbances.
Innovation Solution
Integration of mesh members with concentrically arranged small holes and ring-shaped spacers, where the mesh members are alternately stacked in an axial direction, providing a phase angle difference to create overlapping convex lens-shaped passages that decrease fluid passage area and enhance rectifying effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a plurality of spacers and metal meshes are alternately installed along the inner wall surface of the flow passage, then the rectifying effect can be achieved, but the assembly operation becomes complicated
Solution Approach 1:
The patent combines multiple spacers and metal meshes into a single integrated rectifying element. This rectifying element includes a body with multiple through-holes that incorporate both the spacing function and the mesh rectifying function in one component, eliminating the need for separate assembly of multiple alternating parts and significantly simplifying the assembly operation.
Solution Approach 2:
The integrated rectifying element serves multiple functions simultaneously: it provides spacing between components, creates flow rectification through its mesh structure, and maintains structural support. This multi-functional design replaces what would otherwise require multiple separate components, resolving the contradiction between achieving rectifying effect and maintaining ease of assembly.
2Reliability
If conventional lattice-shaped meshes are used, then the structure is simple, but the rectifying effect is insufficient
Solution Approach 1:
The patent employs irregularly shaped through-holes with non-uniform cross-sectional areas and irregular contours instead of conventional uniform lattice structures. This local variation in hole geometry creates different flow resistance characteristics in different regions, enhancing the rectifying effect by better controlling and uniformizing the flow distribution, while the overall structure remains relatively simple.
Solution Approach 2:
The through-holes are designed with asymmetric and irregular shapes rather than symmetric lattice patterns. This asymmetry creates more effective flow disturbance and mixing, improving the rectifying effect. The irregular geometry prevents straight-through flow paths and promotes better flow uniformization across the passage.
Data Source
AI summary
A rectifying module is arranged on an upstream side of a flow passage containing a flow velocity sensor. The rectifying module includes mesh members each having a plurality of circular small holes and ring-shaped spacers, wherein the mesh members and the spacers are alternately stacked in an axial direction and integrally joined to one another by means of thermal diffusion bonding. The mesh members have identical structures, in which the plurality of small holes are arranged concentrically at angles of separation of 60 degrees in the circumferential direction about the center of a reference small hole. The small holes are formed over the entire surface of the mesh member continuous with adjoining other small holes. The small holes of one mesh member and another mesh member adjacent thereto in the axial direction are arranged so as to have a phase angle difference of 90 degrees in the circumferential direction.