Variable Depth Separating Rods for Fiber-Air Flow
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Solution Overview
Problem
Existing screen surfaces and separating rods in textile machinery suffer from air permeability reduction and fiber end twisting due to clogging, as fibers wrap around rods and air vortices cause entanglement, leading to reduced efficiency in fiber transport.
Innovation Solution
The design features separating rods with increasing depth in the fiber transport direction, allowing only the upper third to be free for fiber approach, which prevents initial twisting and ensures that subsequent fiber tufts pull apart formed twists, maintaining air permeability and fiber flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separating rods with constant depth are used, then device structure is simple, but air permeability decreases and fiber ends twist due to clogging
Solution Approach 1:
The separating rods are designed with varying depth along the fiber transport direction, where the upper third has smaller depth and the lower two thirds have larger depth. This local differentiation allows the upper portion to guide fibers smoothly while the lower portion provides structural support and prevents clogging, resolving the contradiction between structural simplicity and operational reliability.
Solution Approach 2:
The invention transitions from constant-depth rods to variable-depth rods by introducing a depth dimension variation along the fiber transport direction. This dimensional change enables the rods to maintain air permeability and prevent fiber twisting while keeping the overall structure relatively simple.
2Reliability
If separating rods increase in depth by at least 40%, then fiber end twisting is prevented, but device complexity increases
Solution Approach 1:
The varying depth configuration is applied locally to specific sections of the separating rods rather than uniformly throughout. The upper third maintains smaller depth for fiber guidance while the lower two thirds increase depth by at least 40% for structural stability and clogging prevention, achieving improved fiber transport efficiency with controlled complexity.
3Ease of manufacture
If separating rods have constant depth, then manufacturing is easy, but fibers wrap around rods and create air vortices causing twisting
Solution Approach 1:
The separating rods feature a two-zone depth structure where the upper third has smaller depth to reduce fiber wrapping and vortex formation, while the lower two thirds have larger depth (increased by at least 40%) to provide structural support. This local quality differentiation addresses fiber harmful effects while maintaining reasonable manufacturing simplicity.
Solution Approach 2:
The varying depth design proactively prevents fiber wrapping and vortex formation by creating a depth gradient that guides fibers smoothly through the upper section before they reach the lower section, eliminating the harmful effects before they can develop fully.
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 maintains good air permeability and prevents fiber end twisting, ensuring efficient fiber transport by allowing the depth of the separating rods to increase by at least 40% along the fiber flow direction, effectively addressing the clogging issue.
Implementation Method 1
the turbulence caused by sliding along the separating bar is eliminated
Data Source
AI summary
The bar (5) has a same thickness over an entire length in a fiber flow direction and an air passage direction. The thickness of the bar is widened in a fiber transport direction in a region in which fibers (6) are deposited, where the fibers slid along the bar in the transport direction. The thickness widening is increased around 40 percentage of a smallest thickness. An upper third of the bar is designed free for approaching of the fibers. A fiber column (3) is formed by passage of transport air.