Ceramic Insert Cooling Groove for Synthetic Yarn
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Solution Overview
Problem
Existing cooling devices for synthetic threads in texturing zones face challenges in achieving intensive cooling due to the twisted thread structure, which leads to insufficient cooling, especially for larger yarn deniers, and excessive residual cooling liquid, resulting in inefficient heat transfer and friction issues.
Innovation Solution
The cooling device incorporates ceramic inserts with a corrugated groove base within the cooling groove, allowing for continuous and metered supply of cooling liquid, reducing friction, and preventing liquid evaporation and dripping, while maintaining stable yarn guidance through a combination of corrugated and smooth groove sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling fluid is applied directly to the twisted yarn in a conventional cooling groove, then cooling intensity is improved, but the twisted yarn structure prevents effective penetration and the liquid is merely carried along and flung off, resulting in insufficient cooling
Solution Approach 1:
A ceramic insert with a grooved groove base is introduced as an intermediary between the cooling fluid and the twisted yarn. The grooves in the ceramic insert capture and distribute the cooling fluid along the yarn path, ensuring continuous contact and effective heat transfer while preventing the liquid from being flung off by the yarn's motion
Solution Approach 2:
The ceramic insert material provides a porous or grooved structure that retains the cooling fluid along the groove base, allowing gradual evaporation and heat transfer to the yarn rather than direct application that would cause the liquid to be carried away
2Temperature
If the yarn is guided with contact on the groove base to improve cooling, then cooling efficiency is improved, but friction increases and twist transfer is impeded
Solution Approach 1:
The groove base is designed with localized grooves only in specific areas where cooling is needed, while other areas maintain a smooth surface. This allows contact cooling where required without creating excessive friction along the entire yarn path
Solution Approach 2:
The groove base is segmented into multiple grooves rather than a single continuous groove, allowing the yarn to be supported at multiple points while maintaining adequate contact for cooling without excessive friction anywhere along the path
3Temperature
If a long cooling section is used to achieve adequate cooling with ambient air, then cooling effectiveness is improved, but the texturing machine requires a multi-level design, increasing device complexity
Solution Approach 1:
A cooling fluid (liquid or gas) is introduced into the cooling groove to replace or supplement ambient air cooling. This enables intensive cooling in a compact space, eliminating the need for long cooling sections and multi-level machine designs
Solution Approach 2:
The cooling mechanism is changed from passive ambient air cooling to active fluid-based cooling, dramatically increasing the heat transfer coefficient and enabling compact cooling section design
4Temperature
If cooling fluid is applied to the yarn, then cooling intensity is improved, but excessive residual coolant remains on the yarn after exiting the cooling groove
Solution Approach 1:
The ceramic insert with grooved groove base acts as an intermediary that controls fluid release. The grooves retain the cooling fluid and release it gradually through evaporation and controlled contact, preventing excessive liquid from adhering to the yarn
Solution Approach 2:
The cooling fluid is applied in a liquid state and then evaporates during the cooling process. This phase transition from liquid to vapor provides cooling through latent heat of vaporization while leaving minimal residual liquid on the yarn
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 cooling efficiency by distributing the cooling liquid effectively, minimizing friction, and ensuring uniform cooling without excessive thread contact, allowing for compact texturing zones and reduced residual liquid, thus improving the overall cooling performance.
Implementation Method 1
the twisted thread is heated to a temperature of approximately 200°C and then cooled again
Implementation Method 2
the grooves of the groove base, filled with coolant, counteract the strong evaporation of the liquid from the yarn
Data Source
Figure 1
Figure 2.1~2.2
Figure 3
AI summary
A cooling device for a synthetic yarn, particularly a twisted yarn within a texturing zone, is described. The device comprises an elongated cooling element with an open cooling groove for guiding the yarn. The cooling groove is connected via a metering orifice to a metering device for supplying a cooling fluid. To ensure uniform wetting and intensive cooling due to the yarn's dynamic nature, the cooling element has at least one ceramic insert at the yarn entry point. This insert forms a grooved base within the cooling groove, and the yarn can be guided in contact with its surface. The metering orifice is located adjacent to the ceramic insert. This allows the cooling fluid to be continuously supplied to the yarn over a longer distance.