Reversible Compensatory Arm for Yarn Loop Elimination
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Solution Overview
Problem
Existing compensators for eliminating yarn loops during cross-wound bobbin winding on spinning machines are limited in their ability to adapt to varying yarn conditions and require complex sensor systems for precise control, making them inefficient and difficult to adjust for different yarn types and operational states.
Innovation Solution
A device with a reversible two-way controlled compensatory arm, driven by an independent control system, allows for adjustable speed, torque, and force application, enabling the arm to perform a two-way reciprocating motion along a circular or linear path, independent of yarn and bobbin speed, to effectively eliminate yarn loops during both continuous and transient spinning states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-operated compensatory arm is used to eliminate yarn loops, then the yarn tension is maintained constant and loops are eliminated, but the device complexity increases and adaptability to different yarn types is limited
Solution Approach 1:
The compensatory arm is transformed from a passive spring-operated mechanism to an actively controlled reciprocating mechanism. The arm performs controlled reciprocating motions along a circular or linear path, with its position, speed, and applied force being dynamically adjustable through a control system, enabling adaptation to different yarn types and operational conditions while maintaining reliable tension control
Solution Approach 2:
The control system enables independent adjustment of multiple parameters including the speed, position, torque, and force application of the compensatory arm. This parameter variability allows the same device to adapt to different yarn types, bobbin sizes, and spinning conditions without requiring complex mechanical reconfiguration or multiple specialized components
2Measurement precision
If multiple sensors and computing processes are used to control the compensator, then precise control is achieved, but the device complexity and difficulty of operation increase
Solution Approach 1:
The control system automatically adjusts the compensatory arm's characteristics based on detected operational conditions without requiring manual intervention. The system self-regulates the arm's position, speed, and force application, eliminating the need for operators to manually adjust complex sensor systems or interpret computing results, thereby maintaining precision while simplifying operation
3Device complexity
If the compensatory arm speed is coupled to yarn and bobbin speed, then the system is simpler, but the adaptability to different working conditions is reduced
Solution Approach 1:
The compensatory arm is equipped with an independent drive system that enables it to move reciprocally at speeds independent of the yarn production rate and bobbin rotation speed. This dynamic independence allows the arm's speed, position, and force application to be optimized for different yarn types, bobbin dimensions, and spinning conditions without being constrained by the mechanical coupling to other moving parts of the spinning machine
Data Source
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AI summary
The invention relates to a method and a device for eliminating a yarn (0) loop when winding yarn (0) on a cross-wound bobbin (A2) on a spinning machine at a constant speed of the yarn (0) being produced, in which the length of the working path of the yarn (0) varies in the space between a draw-off mechanism (1) of yarn (0) and a winding device (A) of yarn (0) by deflecting the yarn (0) by a capturing and guiding means (7) of a movable compensatory arm (6). The yarn (0) is acted upon in a controlled manner by the capturing and guiding means (7), which is deflected by a reversible two-way controlled means (4), whereby the position and/or direction and/or speed and/or force applied by the reversible two-way controlled means(4) according to the operation which is being carried out at the operating unit.