Electromagnetic Yarn Loop Eliminator with Segmented Magnetic Core
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Solution Overview
Problem
Existing electromagnetic devices for eliminating yarn loops during cross-wound bobbin winding on spinning machines face limitations in controllability, particularly when maintaining simplicity and ease of setup, especially during transient phases like spinning-in yarn or yarn breakage.
Innovation Solution
An electromagnetic device with a cylindrical two-pole permanent magnet mounted rotatably between magnetic core pole pieces, featuring a magnetic core interruption and a permanent magnet at the interruption point, allowing a working range greater than 90° without twisting, and enhanced by a control device connected to an electrical coil and sensor for improved control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a reversible two-way controlled means with a cylindrical two-pole magnet is used to eliminate yarn loops, then the reaction speed and oscillation amplitude are improved, but the controllability is limited
Solution Approach 1:
The magnetic core is divided into two separate parts (first and second magnetic core parts) positioned on opposite sides of the coil. This segmentation allows independent positioning and magnetic flux control, enabling the compensatory arm to achieve greater rotational freedom and improved controllability without compromising reaction speed.
Solution Approach 2:
The invention introduces a permanent magnet at the interruption point of the magnetic core, creating a localized magnetic field enhancement. This local quality change provides additional magnetic flux that allows the compensatory arm to rotate through angles greater than 90° without twisting, thereby improving adaptability and controllability while maintaining the fast response characteristics of the electromagnetic system.
2Adaptability or versatility
If the working range of the compensatory arm is extended beyond 90°, then the controllability is improved, but the risk of twisting the cylindrical two-pole magnet increases
Solution Approach 1:
A permanent magnet is introduced as an intermediary element at the interruption point of the magnetic core. This permanent magnet provides a localized magnetic field that facilitates the rotation of the compensatory arm through angles greater than 90° without causing twisting of the cylindrical two-pole magnet, thereby enabling extended working range while maintaining reliability.
Solution Approach 2:
The magnetic core is designed with an interruption that allows dynamic adjustment of the magnetic flux path. This dynamic configuration enables the compensatory arm to rotate freely through larger angles without rigid constraints that would cause twisting, thus extending the working range while preventing mechanical failure.
3Adaptability or versatility
If a magnetic core interruption with a permanent magnet is introduced, then the working range is extended without twisting risks, but the device complexity increases
Solution Approach 1:
The magnetic core is segmented into two separate parts positioned on opposite sides of the coil, with a permanent magnet placed at the interruption point. This segmentation approach extends the working range to angles greater than 90° without causing magnet twisting, while the modular nature of the segmented design allows for relatively straightforward manufacturing and assembly, thus limiting the increase in device complexity.
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 extends the working range of the compensatory arm without twisting risks, improving controllability and reaction speed, addressing the limitations of previous solutions by optimizing magnetic flux and mechanical design.
Implementation Method 1
a reversible two-way controlled means, whose output element is a compensatory arm, acts upon the yarn, lengthening or shortening the travel path of the yarn
Implementation Method 2
a two pole permanent magnet is located at the point of interruption... extends the working range of the compensatory arm without twisting risks
Data Source
Figure 1
AI summary
The invention relates to an electromagnetic device for eliminating a yarn loop during the process of winding yarn on a cross-wound bobbin on a spinning machine at a constant speed of the yarn production, which comprises a cylindrical two pole magnet (1), which is connected to a compensatory arm (5) of a yarn loop and which is mounted rotatably about its longitudinal axis between two pole pieces (20, 21) of a magnetic core (2) of a coil (4), which are situated opposite each other, whereby on the side remote from the cylindrical two-pole magnet (1) and the pole pieces (20, 21), the magnetic core (2) passes through the electrical coil (4) connected to a source of electrical energy and to a control device. The magnetic core (2) is interrupted in the cavity of the coil (4) and a two pole permanent magnet (3) is located at the point of its interruption.