Vibration Measuring Transducer Tube Layout for Balanced Mass Flow
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Solution Overview
Problem
Existing measuring transducers exhibit significant deviations in partial flow resistances and mass flows due to structural symmetry and fluid dynamics, particularly influenced by Reynolds number, leading to inaccuracies in mass flow measurement.
Innovation Solution
The design of a measuring transducer with specific tube configurations, including varying tube lengths and segment arrangements, ensures minimal deviation in partial flow resistances and mass flows, independent of Reynolds number, by using identical tube segments and symmetrical arrangements to stabilize vibration frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If tubes are made structurally identical only in pairs with varying lengths, then manufacturing precision and flow resistance balance improve, but device complexity increases
Solution Approach 1:
The tube assembly is segmented into four distinct tubes with different length configurations (two longer tubes and two shorter tubes). This segmentation allows each tube to have optimized flow resistance characteristics, achieving better overall flow balance while maintaining manufacturability through modular construction.
Solution Approach 2:
The patent employs asymmetric tube length configuration where tubes are not all identical but come in paired groups with different lengths. This asymmetry creates balanced flow resistance across parallel paths without requiring all tubes to be manufactured to the same exact specifications, thus improving flow balance while controlling manufacturing complexity.
2Measurement precision
If tube lengths are varied to balance flow resistance, then measurement precision improves, but manufacturing complexity increases
Solution Approach 1:
Different sections of the tube assembly have different lengths optimized for their specific flow paths. The longer tubes compensate for higher flow resistance in certain paths, while shorter tubes balance other paths, creating local optimizations that collectively improve overall measurement precision without requiring complete redesign of the entire system.
Solution Approach 2:
The patent changes the length parameter of tubes to optimize flow resistance balance. By varying tube lengths (creating two longer and two shorter tubes), the system achieves balanced mass flow distribution across parallel paths, improving measurement accuracy while keeping the number of different tube designs limited to maintain manufacturing simplicity.
3Stability of the object's composition
If symmetrical tube arrangements are used, then vibration frequency stability improves, but flow resistance balance deteriorates
Solution Approach 1:
The patent breaks complete symmetry by implementing two longer tubes and two shorter tubes in the assembly. This controlled asymmetry compensates for flow resistance imbalances in parallel paths while maintaining sufficient geometric symmetry to preserve vibration frequency stability, thus resolving the contradiction between flow balance and vibration stability.
Solution Approach 2:
Instead of using identical symmetric tubes that create flow resistance imbalances, the patent inverts the approach by deliberately creating length differences. This inversion allows the system to achieve flow resistance balance through asymmetric configuration while maintaining vibration stability through overall geometric symmetry and balanced mass distribution.
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 deviation in partial mass flows less than 2% of the largest flow, with fluctuations limited to 1% within specified Reynolds number ranges, maintaining measurement accuracy and compactness.
Implementation Method 1
vibration-type measuring transducer which is electrically connected to said transformer circuit and through which the medium to be measured flows during operation
Implementation Method 2
Coriolis mass flow meters
Data Source
AI summary
A measuring transducer includes a tube assembly including two pair of structurally identical tubes, each connected at their respective ends to each of two flow dividers, thereby forming four parallel flow paths, and each including alternating, adjoining straight and arcuate segments, wherein each of the first and third arcuate segments has a segment length corresponding to an extended length of a virtual center line of the segment, an arc radius corresponding to a radius of the virtual center line and a center point angle corresponding to a ratio between the segment length and the arc radius, such that each of the first arcuate segments are identical in both shape and size, and such that each of the third arcuate segments are identical in both shape and size, wherein the measuring transducer further includes an exciter assembly and a sensor assembly, each connected to the tube assembly.