Spinneret Core With Movable Capillary for Precise Center Flow
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Solution Overview
Problem
Existing spinnerets lack precise control over the volume flow of center fluid and have a bulky design, making it difficult to adjust and protect the throttle mechanism.
Innovation Solution
A spinneret core with a movable capillary insert and actuator system that allows for precise control of center fluid flow, reducing space requirements and enabling easy adjustment of pressure and flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If long tubes are used as throttle to control center fluid flow, then flow control precision is improved, but device volume increases and mechanical protection becomes difficult
Solution Approach 1:
The throttle tube is nested within the spinneret core structure, with the tube positioned inside the hollow fiber precursor. This nesting approach allows the throttle function to be integrated into the existing spinneret geometry, providing precise flow control without increasing overall device volume. The tube is protected by the surrounding spinneret structure, eliminating the need for external protective containers.
2Measurement precision
If long tubes are used as throttle, then flow control precision is improved, but ease of operation deteriorates due to protection requirements
Solution Approach 1:
The throttle tube is pre-positioned and fixed within the spinneret core at the correct location and orientation before operation. This preliminary positioning eliminates the need for external protection containers and complex adjustment mechanisms during operation. The flow control is achieved simply by adjusting the tube dimensions or position, making the system easy to operate while maintaining precise flow control.
3Stress or pressure
If throttle tube length is increased for pressure control, then pressure increase is improved, but device complexity increases
Solution Approach 1:
Instead of increasing device complexity with additional components, the solution changes the parameters of the existing throttle tube - specifically its length, inner diameter, or wall thickness. By adjusting these geometric parameters, the desired pressure increase is achieved without adding complex mechanisms. The throttle tube remains a simple cylindrical component, maintaining device simplicity while providing effective pressure control.
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
Enables precise control of center fluid flow with reduced space requirements, allowing for compact and flexible operation of spinnerets.
Implementation Method 1
The threaded sections and the inner wall surface of the spinneret core body together define a spiral capillary
Implementation Method 2
The capillary insert is configured to create a pressure increase in a liquid flow through the spinneret core
Data Source
AI summary
The present disclosure relates to a spinneret for producing hollow fiber membranes in a phase inversion process.