Jet Loom Relay Nozzle Control for Yarn Characteristic Adaptation
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Solution Overview
Problem
Current jet loom control systems do not efficiently manage energy and fluid consumption, leading to suboptimal productivity due to a lack of dynamic control based on the local characteristics of the weft yarn.
Innovation Solution
The method involves detecting the local distribution of characteristics within the weft yarn section before insertion into the fluid feed conduit and actuating relay nozzles to produce time-staggered fluid pulses, optimizing control for each individual yarn section by assigning measured parameter values to specific locations, thereby minimizing fluid consumption and ensuring uninterrupted weaving.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If conventional jet loom control systems use uniform fluid pulses for all yarn sections, then the system operation is simple, but energy and fluid consumption are high due to lack of optimization
Solution Approach 1:
The control system divides the weft yarn into discrete sections and applies individualized fluid pulses to each section based on its specific characteristics. This segmentation allows optimized fluid consumption for each yarn section rather than using a uniform high-energy pulse for the entire yarn, directly reducing overall energy and fluid loss.
Solution Approach 2:
The control system dynamically adjusts the fluid pulse characteristics (timing, duration, intensity) based on real-time detection of yarn characteristics. This dynamic adaptation enables the system to optimize energy and fluid consumption for each yarn section while maintaining operational effectiveness, resolving the contradiction between simplicity and energy efficiency.
2Productivity
If the loom operates with standard control parameters, then productivity is maintained at baseline levels, but energy efficiency is suboptimal
Solution Approach 1:
The system incorporates detection means that continuously monitor yarn characteristics and provide feedback to the control system. This feedback loop enables real-time optimization of fluid pulse parameters, allowing the system to maintain high productivity by adapting to yarn variations while simultaneously reducing energy and fluid consumption through precise, needs-based actuation.
Solution Approach 2:
The control system dynamically changes fluid pulse parameters (timing, duration, intensity) based on detected yarn characteristics. By adjusting these parameters to match actual yarn needs rather than using fixed standard parameters, the system achieves both high productivity and improved energy efficiency.
3Manufacturing precision
If uniform actuation is used for all yarn sections, then the control system is simple to operate, but fabric quality suffers due to inability to address local yarn characteristics
Solution Approach 1:
The control system applies different fluid pulse characteristics to different sections of the weft yarn based on their specific local characteristics detected by the sensing means. This local quality approach ensures that each yarn section receives precisely what it needs for optimal insertion, thereby improving fabric quality without requiring complex manual intervention or operation.
Solution Approach 2:
The system automatically detects yarn characteristics and adjusts fluid pulse parameters without requiring manual intervention or complex operation. The control system serves itself by using integrated detection means to guide the actuation process, improving fabric quality while maintaining ease of operation through automated decision-making.
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 approach reduces energy and fluid consumption while maintaining productivity by adapting the weaving process to the unique characteristics of each weft yarn section, enhancing fabric quality and preventing yarn defects.
Implementation Method 1
The relay nozzles are actuated so as to eject time-staggered fluid pulses which produce a fluid flow in the fluid feed conduit. The weft yarn is conveyed by the fluid flow through the fluid feed conduit.
Data Source
Figure 1
Figure 2
Figure 3(a)~3(c)
AI summary
A method for controlling a jet loom (1) is proposed. The jet loom (1) contains a plurality of relay nozzles (33) arranged along a fluid feed conduit (8). A weft yarn (93) is introduced into the fluid feed conduit (8), the relay nozzles (33) are actuated so as to eject time- staggered fluid pulses which produce a fluid flow in the fluid feed conduit (8), and the weft yarn (93) is conveyed by the fluid flow through the fluid feed conduit (8). The relay nozzles (33) are actuated based on a local distribution of characteristics within the respectively conveyed weft yarn section (93). Thus, the energy and air consumption of the jet loom (1) are reduced and the productivity of the jet loom (1) is increased