Coriolis Flow Meter Coupler Tuning Opening
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Solution Overview
Problem
Coriolis mass flow and density measuring devices (CMDs) face significant performance degradation due to energy dissipation and disturbance oscillations from the environment, particularly in connected fluid lines, which affect accuracy and reliability.
Innovation Solution
The design incorporates mirror-symmetric bent measuring tubes with plate-shaped couplers featuring tuning openings to minimize cross-sensitivity to environmental vibrations and dissipate oscillatory energy, optimizing oscillator characteristics and reducing mechanical stresses through strategic positioning and symmetry differences in couplers and tuning openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional couplers are used to connect measuring tubes, then the oscillator can be formed with defined oscillation characteristics, but oscillatory energy dissipates to the environment and disturbing oscillations are in-coupled into the oscillator
Solution Approach 1:
The coupler is designed with an asymmetric structure featuring a through-opening that breaks the symmetry of the conventional solid coupler. This asymmetric design creates specific oscillation nodes at the edges of the through-opening, which effectively decouple the oscillator from environmental vibrations while maintaining defined oscillation characteristics for accurate measurement.
Solution Approach 2:
The coupler incorporates a through-opening that creates a porous-like structure, allowing the oscillator to have defined oscillation characteristics while reducing the coupling of environmental disturbances. The opening enables the system to filter out harmful vibrations while maintaining measurement accuracy.
2Loss of energy
If the coupler position is optimized to reduce energy dissipation, then oscillatory energy loss is minimized, but cross-sensitivity to environmental vibrations cannot be fully eliminated
Solution Approach 1:
The asymmetric through-opening design in the coupler creates specific oscillation nodes that simultaneously address both energy dissipation and vibration sensitivity. The opening edges serve as nodes that reduce energy loss while the asymmetric configuration provides additional degrees of freedom to minimize cross-sensitivity to environmental vibrations.
Solution Approach 2:
The invention changes the structural parameters of the coupler by introducing a through-opening with specific dimensions and positioning. This parameter change creates new oscillation characteristics with nodes at the opening edges, enabling simultaneous optimization of energy dissipation and vibration resistance.
3Stability of the object's composition
If solid couplers are used to rigidly connect measuring tubes, then structural stability is achieved, but mechanical stresses concentrate and oscillatory energy transfers to collectors
Solution Approach 1:
The asymmetric through-opening design distributes mechanical stresses more evenly across the coupler structure. The opening creates stress relief zones at the edges while maintaining overall structural stability, preventing stress concentration that would occur in solid couplers.
Solution Approach 2:
The through-opening creates a porous-like structure that reduces mechanical stress concentration while maintaining structural integrity. The opening allows the coupler to flex and distribute stresses more evenly, preventing the stress concentration that occurs in solid rigid couplers.
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 approach effectively suppresses the out-coupling of oscillatory energy and in-coupling of disturbing oscillations, enhancing the long-term stability and reproducibility of measurements while reducing the risk of leakage and downtime.
Implementation Method 1
the actuator arrangement is adapted to excite a bending oscillation wanted mode between the two measuring tubes of the oscillator
Implementation Method 2
the sensor arrangement is adapted to register oscillations of the oscillator
Implementation Method 3
inlet end and outlet end, in each case, at least one coupler has, between the measuring tubes connected by the couplers a tuning opening surrounded by a closed edge for influencing the oscillation characteristics of the oscillator
Data Source
AI summary
A Coriolis mass flow measuring device and/or density measuring device includes two bent measuring tubes, which extend mirror symmetrically to a first mirror plane between the measuring tubes, an actuator arrangement and at least one sensor arrangement. At the inlet end and at the outlet end, a collector, with which the measuring tubes are joined, wherein the collectors each fulfill the functionality of a node plate. A support body, which connects the collectors rigidly with one another; and inlet end and outlet end, in each case, at least one plate-shaped coupler, which connect the measuring tubes pairwise with one another, in order to form an oscillator. The couplers have tube openings for measuring tubes, wherein the measuring tubes are connected at least sectionally with the couplers, wherein inlet end and outlet end, in each case, at least one coupler has, between the measuring tubes, a tuning opening for influencing the oscillation characteristics of the oscillator.