Spinning Machine Package Braking Control
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Solution Overview
Problem
Conventional spinning machines face challenges in reliably stopping the rotation of packages with large inertia moments, leading to potential yarn quality degradation and disrupted yarn joining operations due to insufficient braking times.
Innovation Solution
A spinning machine equipped with a control section that adjusts the contacting time of a braking section with the package based on its outer diameter and traveling speed, ensuring reliable rotation stoppage before yarn joining operations, and incorporating a reverse-rotation roller to prevent yarn quality degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the braking section contacts the package for a predetermined period of time, then the braking operation is completed, but the rotation of the package cannot be stopped when the inertia moment is large
Solution Approach 1:
The contacting time between the braking section and the package is made variable rather than fixed. The control section adjusts the contacting time dynamically based on the outer diameter of the package, which correlates with its inertia moment. This allows the braking operation to adapt to different package sizes and ensure reliable rotation stoppage regardless of the package's rotational inertia.
2Productivity
If the operation cart arrives at the spinning unit in a short period of time, then productivity is improved, but the rotation speed of the package is not reduced sufficiently
Solution Approach 1:
The control section receives information about the outer diameter of the package and uses this feedback to determine the appropriate contacting time for the braking section. This feedback mechanism ensures that the braking operation is adequately timed to reduce the package rotation speed to zero, even when the operation cart arrives quickly, thereby maintaining both productivity and effective braking.
3Ease of operation
If the reverse-rotation roller attempts to reversely rotate the continuously rotating package, then yarn guiding is enabled, but the quality of the spun yarn degrades
Solution Approach 1:
The braking section performs a preliminary action by stopping the package rotation before the reverse-rotation roller attempts to reversely rotate the package. This preliminary braking ensures that the package is stationary or rotating very slowly when the reverse-rotation operation begins, preventing yarn quality degradation while still enabling the guiding section to catch and guide the spun yarn properly.
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 solution effectively stops package rotation, maintains yarn quality, and enhances operational efficiency by optimizing the contacting time based on package size and speed, allowing for seamless yarn joining and improved production efficiency.
Implementation Method 1
a braking section (21) adapted to make contact with the rotating package (P) to brake rotation of the package (P)
Data Source
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AI summary
A spinning machine (100) includes a plurality of spinning units (10). Each spinning unit (10) is adapted to wind a spun yarn (Y) to form a package (P), a braking section (21) is adapted to make contact with the rotating package (P) to brake rotation of the package (P), a driving section (22) is adapted to drive the braking section (21) to make contact with or separate from the package (P), and a control section (40) is adapted to control the driving section (22) to adjust a contacting time of the package (P) and the braking section (21) by transmitting a control signal to the driving section (22).