Axial Flow Meter Spindle Axial Constraint Design
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Solution Overview
Problem
Axial flow meters face accuracy issues during erratic or stop-and-go flow conditions due to floating spindles, which affect measurement precision.
Innovation Solution
The axial flow meter design incorporates fixed bearings and plugs to prevent axial movement of spindles, ensuring accurate rotation detection and measurement by engaging the spindles with plugs that abut and close the openings of the bearings, thereby stabilizing the spindles and maintaining precision during varying flow rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If spindles are mounted to rotate freely in axial flow meters, then flow rate measurement is enabled, but axial movement occurs during erratic flow conditions causing measurement inaccuracy
Solution Approach 1:
The patent applies local quality by providing different axial constraints at different locations along the spindle. The first bearing is freely movable axially to accommodate flow variations, while the second bearing is fixed axially to prevent excessive movement. This localized differentiation of constraint conditions resolves the contradiction by allowing necessary rotation freedom while preventing harmful axial displacement during erratic flow.
Solution Approach 2:
The patent implements dynamics by making the first bearing axially movable while keeping the second bearing axially fixed, creating a dynamic constraint system that adapts to flow conditions. The first bearing can move axially in response to flow variations, while the second bearing maintains a fixed position to limit the overall axial movement of the spindle assembly, thereby maintaining measurement precision under varying flow conditions.
2Measurement precision
If spindles are constrained axially to prevent movement, then measurement accuracy improves, but spindle rotation freedom is reduced affecting flow measurement capability
Solution Approach 1:
The patent applies local quality by providing different axial constraints at different locations along the spindle. The first bearing is freely movable axially to accommodate flow variations, while the second bearing is fixed axially to prevent excessive movement. This localized differentiation of constraint conditions resolves the contradiction by allowing necessary rotation freedom while preventing harmful axial displacement during erratic flow.
Solution Approach 2:
The patent implements dynamics by making the first bearing axially movable while keeping the second bearing axially fixed, creating a dynamic constraint system that adapts to flow conditions. The first bearing can move axially in response to flow variations, while the second bearing maintains a fixed position to limit the overall axial movement of the spindle assembly, thereby maintaining measurement precision under varying flow conditions.
3Measurement precision
If fixed bearings are used to stabilize spindles, then axial movement is prevented, but manufacturing complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the bearing system into two distinct parts: a first bearing that is freely movable axially and a second bearing that is fixed axially. This segmentation allows each bearing to be manufactured and installed independently with different degrees of freedom, simplifying the overall manufacturing process while achieving the desired stabilization effect through the coordinated action of the two bearings.
Solution Approach 2:
The patent implements dynamics by making the first bearing axially movable while keeping the second bearing axially fixed, creating a dynamic constraint system that adapts to flow conditions. The first bearing can move axially in response to flow variations, while the second bearing maintains a fixed position to limit the overall axial movement of the spindle assembly, thereby maintaining measurement precision under varying flow conditions.
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 design enhances measurement accuracy by preventing axial movement of spindles, resulting in higher spindle rotation counts and more accurate flow rate measurements, even during erratic flow conditions.
Implementation Method 1
The sensor unit includes a magnet positioned at or near an end of a spindle and a detector unit adapted to detect changes in magnetic field output by the magnet
Data Source
AI summary
An axial flow meter includes a housing including a generally elongated body with a continuous internal bore. Two spindles are mounted parallel to one another in the housing. Each spindle has a blade on the exterior surface of the spindle. Blades on each of the two spindles engage with each other. Bearings at each end of both spindles engage the spindles. At least one of the bearings engaging each one of the spindles is fixed in a position relative to the elongated body thereby preventing axial movement of the two spindles while allowing rotational movement of the two spindles.