Yarn Cooler Porous Plate Flow Adjustment
Solution Overview
Problem
Existing yarn coolers with multiple porous plates fail to actively improve flow adjustment and suffer from time variations in cooling air flow, leading to uneven yarn quality.
Innovation Solution
A yarn cooler design featuring a first porous plate with a thickness ratio of 0.7 to 1.6 and a second porous plate with a smaller thickness ratio, positioned to adjust and further uniformize the cooling air flow, preventing clogging and ensuring smooth airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple porous plates are provided in the buffer chamber, then the effect of preventing clogging is improved, but the effect of flow adjustment is not actively improved compared to a single porous plate configuration
Solution Approach 1:
The single porous plate is segmented into multiple porous plates (first porous plate and second porous plate) arranged in sequence in the cooling air flow path. Each porous plate has different thickness ratios, allowing them to perform different functions: the first porous plate primarily prevents clogging while the second porous plate actively adjusts the flow, thereby resolving the contradiction between preventing clogging and improving flow adjustment effect.
Solution Approach 2:
Different portions of the porous plate system are given different local qualities through varying thickness ratios. The first porous plate has a larger thickness ratio optimized for clogging prevention, while the second porous plate has a smaller thickness ratio optimized for flow adjustment. This local differentiation allows each component to excel at its specific function, resolving the contradiction between reliability and device complexity.
2Manufacturing precision
If there is a time variation in the flow of cooling air entering into the yarn running space, then unevenness in cooling is caused in the yarns, but increasing flow adjustment complexity may worsen device complexity
Solution Approach 1:
The thickness ratio parameter of the porous plates is changed and optimized to achieve better flow adjustment. By setting the first porous plate with a larger thickness ratio and the second porous plate with a smaller thickness ratio, the system achieves superior flow uniformity and reduced time variations compared to conventional single-plate designs, thereby improving manufacturing precision without excessive complexity.
3Device complexity
If a single porous plate is used, then the device complexity is reduced, but the flow adjustment effect is insufficient leading to time variations in cooling air flow
Solution Approach 1:
Instead of using a single porous plate, the system segments the flow adjustment function into multiple porous plates with different thickness ratios. This segmentation enables the system to achieve superior flow uniformity and reduce time variations in cooling air flow, while the modular design keeps the overall device complexity manageable.
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 effectively restrains time variations in cooling air flow, enhancing flow uniformity and reducing yarn quality unevenness, resulting in improved yarn quality and production efficiency.
Implementation Method 1
a first porous plate disposed in a supply passage where the cooling air supplied through the supply portion flows upward along the impassable section, the first porous plate being configured to adjust the flow of the cooling air
Implementation Method 2
a second porous plate disposed above and apart from the first porous plate in the supply passage, the second porous plate being configured to further adjust the flow of the cooling air having been adjusted by the first porous plate
Implementation Method 3
yarns are cooled by the cooling air entering from the buffer chamber to the yarn running space
Data Source
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AI summary
An object is to actively improve the effect of flow adjustment in a yarn cooler including a plurality of porous plates, as compared with the configuration where a single porous plate is provided, and to effectively restrain a time variation in the flow of cooling air entering into a yarn running space. The yarn cooler includes: a first porous plate 36 disposed in a supply passage 35 where cooling air flows upward along an impassable section 34 of a cooling cylinder 31, the first porous plate 36 being configured to adjust the flow of the cooling air; and a second porous plate 37 disposed above and apart from the first porous plate 36 in the supply passage 35, the second porous plate 37 being configured to further adjust the flow of the cooling air having been adjusted by the first porous plate 36, and the thickness ratio of the second porous plate 37 is designed to be smaller than the thickness ratio of the first porous plate 36.