Spun Yarn Drawing Guide Path for Heat Recovery and Swing Control
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Solution Overview
Problem
Existing spun yarn drawing apparatuses suffer from yarn swing issues due to airflow disturbances, which adversely affect yarn quality, and they also experience significant energy loss due to the outflow of high-temperature air.
Innovation Solution
The apparatus incorporates a guide path within the thermal insulation box, with its inlet positioned closer to the second heating roller and its outlet closer to the first heating roller, to efficiently direct high-temperature air from the second roller to the first roller, minimizing energy loss and reducing yarn swing by aligning airflow with the yarn running direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If high-temperature air is guided to the low-temperature air region using an air duct orthogonal to the roller axis, then heat energy utilization is improved, but yarn swing occurs due to airflow disturbance
Solution Approach 1:
The patent changes the guiding direction of high-temperature air from the axial direction (parallel to roller axis) to the radial direction (orthogonal to roller axis). The guide path directs air from the second heating roller toward the first heating roller in a direction orthogonal to the roller axes, thereby eliminating yarn swing while maintaining heat energy utilization efficiency.
2Temperature
If low-temperature air flows through the yarn inlet to cool the first heating roller, then yarn heating at the inlet is improved, but heat energy loss increases
Solution Approach 1:
The patent converts the harmful outflowing high-temperature air into a beneficial resource by guiding it through a guide path to the low-temperature air region near the first heating roller. This回收利用 (recycling) of waste heat energy prevents direct energy loss while providing necessary thermal conditions for yarn heating at the inlet.
Solution Approach 2:
The guide path acts as an intermediary structure that transfers high-temperature air from the second heating roller region to the first heating roller region. This mediator enables heat energy redistribution without direct contact between hot and cold zones, efficiently utilizing thermal energy while maintaining proper temperature gradients.
3Loss of energy
If the guide path inlet is positioned close to the yarn outlet, then heat energy recovery is improved, but yarn swing occurs at the outlet
Solution Approach 1:
The patent positions the guide path inlet close to the second heating roller (not the yarn outlet) and directs air flow along a path that avoids the yarn outlet region. This localized positioning strategy ensures heat energy recovery from the second roller while preventing airflow-induced yarn swing at the outlet, achieving both goals simultaneously through spatial differentiation.
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 effectively suppresses yarn swing and enhances energy utilization by maintaining the temperature around the first heating roller, thereby improving yarn quality and reducing power consumption.
Implementation Method 1
heating rollers which are accommodated in the thermal insulation box and are configured to feed the yarn in a yarn running direction that is a direction toward the yarn outlet from the yarn inlet, while heating the yarns
Implementation Method 2
a thermal insulation box which includes a yarn inlet through which yarns are introduced and a yarn outlet through which the yarns go out
Data Source
Figure 1
Figure 2
Figure 3
AI summary
Yarn swing of yarns wound onto rollers is suppressed while heat energy is efficiently utilized in a thermal insulation box. A spun yarn drawing apparatus 3 includes a guide path 60 having an inlet 61 that is closest to a godet roller 35 among godet rollers 31 to 35 and an outlet 62 that is closest to a godet roller 31 among the godet rollers 31 to 35. The inlet 61 is provided to overlap a region that extends along the axial direction of the godet roller 35 when viewed in the axial direction of the godet roller 35, and the outlet 62 is provided to overlap a region extending along the axial direction of the godet roller 31 when viewed in the direction orthogonal to the axial direction of the godet roller 31.