Coriolis Flowmeter Vibration Isolation via Embedded Base
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Solution Overview
Problem
Coriolis mass flowmeters struggle to accurately measure small flow rates due to sensitivity to external vibrations, which can interfere with measurement results.
Innovation Solution
The flow channel is designed to run entirely within a solid base, with the measuring tube bent in U- or V-shapes to form oscillating sections that oscillate in opposite phases, and the base serves as a reference ground to decouple external vibrations, allowing the measuring tube to protrude only at the inlet and outlet ends for secure pipeline integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the measuring tube is exposed to external vibrations from the pipeline system, then the flowmeter can be integrated into the pipeline system, but the measurement precision deteriorates due to vibration interference
Solution Approach 1:
The patent introduces a damping element as an intermediary component between the pipeline system and the measuring tube. This damping element acts as a mediator that absorbs and dissipates external vibrations from the pipeline, preventing them from reaching and interfering with the measuring tube's oscillation, thus protecting measurement precision while maintaining pipeline integration capability
Solution Approach 2:
The patent converts the harmful external vibrations into a beneficial effect by using the damping element to selectively absorb vibration frequencies. The damping element is designed to dissipate specific vibration frequencies while allowing the measuring tube's operational oscillations to pass through, thus transforming the harmful vibration environment into a condition that protects the measurement system
2Object-affected harmful factors
If the flow channel runs entirely within the base, then insensitivity to external vibrations is improved, but the device complexity increases due to the integrated base structure
Solution Approach 1:
The patent merges the base structure with the flow channel by designing the flow channel to run entirely within the base. This integration combines two separate components (base and flow channel) into a unified structure, reducing the number of separate parts and simplifying the overall device while maintaining vibration isolation properties
Solution Approach 2:
The base structure serves multiple functions simultaneously: it provides structural support for the flowmeter, houses the flow channel entirely within it, and acts as a vibration-isolating reference ground. This multi-functionality reduces the need for separate components, thereby reducing device complexity while achieving vibration insensitivity
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 enhances insensitivity to external vibrations, improves measurement accuracy, and eliminates the need for a flow divider, enabling precise measurement of small flow rates while maintaining a compact design.
Implementation Method 1
the measuring tube or tubes through which a medium can flow is excited by a vibration generator to oscillate, which preferably corresponds to a specific natural frequency in resonance frequency
Implementation Method 2
In mass flowmeters based on the Coriolis principle, the measuring tube or tubes through which a medium can flow is excited by a vibration generator to oscillate
Implementation Method 3
The base is preferably made of a material that has a high density and/or good damping properties
Data Source
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AI summary
A Coriolis mass flow meter is described and illustrated, comprising a measuring tube (2) for forming a flow channel, at least one vibration generator (not shown), and at least one vibration sensor (not shown). The measuring tube (2) has an inlet end (4), two vibration sections (3a, 3b), and an outlet end (5), and is bent at least partially such that two U- or V-shaped vibration sections (3a, 3b) extending in substantially parallel planes are formed. The vibration sections (3a, 3b) can be excited to vibration by the vibration generator (not shown). According to the invention, the flow channel—with the exception of the inlet end (4), the vibration sections (3a, 3b), and the outlet end (5)—extends within a base (6).