Variable Cross-Section Suction Nozzle for Textile Thread Looping
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Solution Overview
Problem
Existing suction air nozzles for textile machines suffer from inadequate suction power and a high risk of thread twisting or knotting, especially with longer thread loops, which disrupts the operation of work stations.
Innovation Solution
A suction air nozzle design with a nozzle body whose clear cross-section increases continuously from the inlet to the outlet opening, featuring diverging tubular edge regions and a guide contour with curved side walls to ensure stable thread positioning and reduce knotting risks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the clear cross section of the nozzle body is constant from inlet to outlet opening, then the suction air nozzle structure is simple, but the suction power is insufficient and thread loops cannot be reliably positioned
Solution Approach 1:
The nozzle body transitions from a static constant cross-section design to a dynamic variable cross-section design where the clear cross section increases continuously from inlet to outlet opening. This dynamic geometric progression optimizes suction power distribution along the thread loop path, enabling reliable positioning of longer thread loops while maintaining operational simplicity.
2Reliability
If the inlet opening has greatest extension in the yarn direction, then the nozzle can accommodate thread loops, but twisting or knotting of the yarn occurs disrupting operation
Solution Approach 1:
The geometric parameters of the nozzle body are changed by implementing a continuous increase in clear cross section from inlet to outlet opening. This parameter transformation creates a gradient suction force distribution that gently guides the thread loop through the nozzle, preventing twisting and knotting while maintaining reliable operation stability.
3Reliability
If the nozzle body has constriction or curved sections to reduce knotting, then thread positioning is improved, but suction power distribution becomes insufficient for longer thread loops
Solution Approach 1:
Instead of using constrictions or curved sections that limit suction power, the invention employs a continuous dimensional expansion of the clear cross section along the axial direction from inlet to outlet. This dimensional approach provides both adequate suction power distribution and reliable thread loop positioning for longer threads without the limitations of constricted designs.
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
The design enhances suction power distribution and thread tension, preventing knotting and ensuring reliable storage of longer thread loops, thereby maintaining operational stability.
Implementation Method 1
a suction air nozzle which has a nozzle body (12) whose clear cross section increases from an inlet opening (7) in the axial direction to an end outlet opening (10)
Data Source
Figure 1
Figure 2~4
AI summary
The invention relates to a suction-air nozzle (5) for a textile machine for storing a length of a continuous thread passing through the nozzle opening, having an elongate nozzle body which has a clear cross section (QR) which is narrower in the region of its longitudinal centre axis (11) than in its tube-like peripheral regions (16, 18), and having an inlet opening which has its greatest extent in the direction in which the thread runs. The invention provides for the clear cross section (Q) of the nozzle body (12) of the suction-air nozzle (5) to increase in the axial direction from the inlet opening (7) of the nozzle body (12) towards an end-side exit opening (10).