Yarn Heater Flow Blockers Reduce Air Speed and Heat Loss
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Solution Overview
Problem
Existing yarn heating systems experience significant heat energy loss due to the acceleration of accompanied air flows along the yarn path, leading to excessive hot air discharge through the outlet.
Innovation Solution
The implementation of flow blockers on the yarn heating rollers, positioned to block the accompanied air flow at the point of acceleration, reduces the speed of the air flow and minimizes heat energy loss by restricting its progression downstream.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rollers are used to heat and feed yarn from inlet to outlet, then yarn heating and processing efficiency are improved, but accompanied air flow is accelerated along the yarn path causing significant heat energy loss
Solution Approach 1:
The harmful accompanied air flow is extracted and blocked by introducing flow blockers at strategic positions on the rollers. The flow blockers intercept the air flow before it can be accelerated along the yarn path, separating the useful yarn processing function from the harmful air flow acceleration effect.
Solution Approach 2:
Flow blockers are introduced as intermediary elements between the rollers and the air flow. These blockers serve as mediators that prevent direct interaction between the rotating rollers and the air flow, thereby eliminating the acceleration effect while preserving the yarn processing function.
2Loss of energy
If flow blockers are added to restrain accompanied air flow, then heat energy loss is reduced, but device complexity increases
Solution Approach 1:
Flow blockers are placed only at specific local positions on the rollers where the accompanied air flow is generated, rather than modifying the entire roller structure or thermal insulation box. This localized approach minimizes the added complexity while effectively addressing the heat energy loss problem.
Solution Approach 2:
The flow blockers are designed as thin plate-like structures that extend from the roller surface toward the wound region. These thin-film elements effectively block air flow without adding significant structural complexity or weight to the device.
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 use of flow blockers effectively reduces the speed of accompanied air flows, thereby minimizing heat energy loss and enhancing the thermal efficiency of the yarn heating process.
Implementation Method 1
the yarn introduced into the thermal insulation box through the yarn inlet is wound onto each of the rollers at a winding angle of less than 270 degrees, the yarn heater further comprising a yarn heating roller configured to heat the yarn
Implementation Method 2
in the vicinity of the outer circumference of each roller, an accompanied flow is generated as the air around the roller flows in the circumferential direction in accordance with the rotation of the roller
Data Source
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AI summary
The acceleration by a roller of an accompanied flow running from an yarn inlet to a yarn outlet of a thermal insulation box along the running direction of a yarn is restrained, and heat energy loss due to the discharge of hot air through the yarn outlet is restrained as much as possible. A heating-drawing unit 7 includes a thermal insulation box 16 having a yarn inlet 16a and a yarn outlet 16b and five godet rollers 11a to 11e which are yarn heating rollers. A yarn Y introduced into the thermal insulation box 16 through the yarn inlet 16a is wound onto each of the five godet rollers 11a to 11e at a winding angle of less than 270 degrees. For each of the five godet rollers 11a to 11e, a flow blocking plate 30 is provided to extend from the outside of the roller 11 toward a yarn separation position P1 on the outer circumference of the roller 11.