Impeller Thread Laying Device Variable Stroke Control
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Solution Overview
Problem
Impeller thread traversing devices in the textile industry are limited by their fixed stroke width, leading to wear and energy inefficiencies, and lack the flexibility to produce varying thread windings with different structures and qualities.
Innovation Solution
A method for controlling impeller thread traversing devices to achieve a variable stroke width by adjusting the axial positions of reversal points and calculating compensation angular velocities, allowing for precise control of the oscillating movement and energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable stroke width thread laying devices are used to achieve complete freedom for winding structure, then winding flexibility is improved, but wear increases and energy requirements rise
Solution Approach 1:
The patent applies dynamics by enabling the stroke width of the impeller thread laying device to vary dynamically during operation. The control device adjusts the axial position of the thread guide ruler and modifies the angular velocity of the idle stroke impeller based on real-time winding requirements, allowing the system to adapt between fixed and variable stroke widths without mechanical redesign, thus achieving winding flexibility while controlling wear and energy consumption.
Solution Approach 2:
The patent implements parameter changes by modifying the angular velocity parameter of the idle stroke impeller and the axial position parameter of the thread guide ruler. These parameter adjustments allow the device to transition between different operational modes (fixed and variable stroke width) and optimize performance for different winding structures, reducing wear and energy requirements while maintaining adaptability.
2Productivity
If fixed stroke width impeller thread laying devices are used to operate at high double stroke rates, then productivity is improved, but adaptability for different winding structures is reduced
Solution Approach 1:
The patent makes the previously fixed stroke width dynamic by introducing a control device that can adjust the axial position of the thread guide ruler and the angular velocity of the idle stroke impeller. This allows the device to maintain high productivity through rapid operation while adapting to different winding structures by dynamically modifying the stroke width parameter during the winding process.
Solution Approach 2:
The patent enhances universality by enabling the impeller thread laying device to perform multiple functions: it can operate in fixed stroke width mode for high-speed standard winding and switch to variable stroke width mode for specialized winding structures. The control device coordinates both impellers to achieve different winding patterns, making a single device versatile for various production needs.
3Adaptability or versatility
If the axial position of reversal points is adjusted to achieve variable stroke width, then adaptability is improved, but device complexity increases
Solution Approach 1:
The patent employs feedback control where the control device continuously monitors the position and operation of both impellers and the thread guide ruler. Based on this feedback, the control device dynamically adjusts the angular velocity of the idle stroke impeller and the axial position of the thread guide ruler to achieve the desired variable stroke width, managing complexity through intelligent coordination rather than mechanical complexity.
Solution Approach 2:
The control device serves as an intermediary that coordinates the complex interactions between the two impellers and the thread guide ruler. Rather than requiring complex mechanical linkages, the control device uses electronic signals to synchronize the operation of both impellers and adjust parameters, simplifying the overall system architecture while achieving variable stroke width functionality.
4Manufacturing precision
If the idle stroke impeller is accelerated to overcompensation angular velocity, then manufacturing precision of reversal point positioning is improved, but energy consumption increases
Solution Approach 1:
The patent applies periodic action by using pulsed acceleration of the idle stroke impeller to overcompensation angular velocity only during specific sub-intervals when positioning accuracy is critical. During other phases, the impeller operates at normal speed, reducing overall energy consumption while maintaining precision when needed. The control device timing the acceleration pulses to coincide with critical positioning moments.
Solution Approach 2:
The patent implements preliminary action by pre-calculating and positioning the idle stroke impeller at the correct angular velocity before the thread transfer point is reached. The control device determines the required overcompensation angular velocity in advance and initiates acceleration early in the idle stroke interval, ensuring precise reversal point positioning while allowing the impeller to decelerate naturally afterward, minimizing energy waste.
Data Source
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AI summary
The invention relates to a method (100) for controlling a thread laying device comprising two impellers (26, 28) which can be driven in opposite directions in order to move a thread to be wound on a rotating spool back and forth between two turning points (U1, U2) along the spool longitudinal axis by means of a traversing movement with a target traversing stroke width (Hs) of the thread laying device, said target traversing stroke width differing from a base traversing stroke width (HN). According to the invention, each impeller (26, 28) being moved in the idle traversing stroke, i.e. each idle traversing stroke impeller (26, 28), is first accelerated or braked to an overcompensation angular speed (Voc) in the idle traversing stroke interval (TL) of the impeller, said overcompensation angular speed being determined on the basis of a theoretical constant compensation angular speed (Vc) required to transfer the thread in the next turning point (U1, U2) of the traversing movement of the thread. The impeller is then moved at its specified operating angular speed (Vw) in order to receive the thread from the other impeller (26, 28) guiding the thread at the operating angular speed (Vw) in the next turning point (U1, U2) of the traversing movement of the thread. The invention further relates to a thread laying device and to a winding machine comprising such a thread laying device.