Rotor Spinning Machine Speed Control via Yarn Breakage Feedback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Open-end rotor spinning machines face challenges in determining the maximum rotor speed due to numerous influencing factors, leading to suboptimal productivity and increased yarn breakage rates, which are costly and labor-intensive to experimentally determine.
Innovation Solution
The implementation of control means that automatically adjust the spinning rotor speed based on the yarn breakage rate to maintain it within a predetermined target range, ensuring the speed does not exceed a maximum or fall below a minimum, thereby optimizing productivity and yarn quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If rotor speed is increased to improve productivity, then spinning speed and productivity increase, but yarn breakage rate increases due to quadratic increase in centrifugal force
Solution Approach 1:
The patent implements a control circuit that continuously monitors the yarn breakage rate and automatically adjusts the rotor speed based on feedback from the actual breakage rate. The control means compare the actual breakage rate with a target value and modify the rotor speed accordingly, creating a closed-loop feedback system that resolves the contradiction between high productivity and low yarn breakage rate
Solution Approach 2:
The patent dynamically changes the rotor speed parameter based on monitored yarn breakage rate conditions. By automatically adjusting this critical parameter within optimized ranges, the system maintains productivity while preventing excessive yarn breakage that occurs at constantly high speeds
2Productivity
If rotor speed is manually determined through experiments to optimize productivity, then maximum speed can be found, but the process is expensive and personnel-intensive
Solution Approach 1:
The control circuit automatically determines and adjusts the optimal rotor speed without requiring manual experimental determination by operators. The system self-regulates by monitoring yarn breakage rate and autonomously finding the optimal speed range, eliminating the need for expensive and time-consuming manual experiments
Solution Approach 2:
The patent replaces manual mechanical experimentation with an automated electronic control system. The control circuit uses electronic sensors and actuators to monitor and adjust rotor speed, substituting the manual mechanical trial-and-error process with an automated electronic feedback system
3Productivity
If rotor speed is increased to maximize productivity, then output increases, but the maximum speed must be continuously re-determined when parameters change
Solution Approach 1:
The continuous feedback mechanism automatically adapts to parameter changes in real-time. When yarn parameters or rotor characteristics change, the control circuit continuously monitors yarn breakage rate and automatically adjusts rotor speed, eliminating the need to stop production for re-determination of maximum speed
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 solution allows for the optimal adjustment of rotor speed, reducing yarn breakage rates and increasing productivity by automatically regulating the spinning process, ensuring maximum efficiency and consistent yarn quality without the need for continuous experimental determination of optimal speeds.
Implementation Method 1
the centrifugal force generated by the yarn circulation in the rotor
Implementation Method 2
rotates at high speed in a rotor housing which is closed by a cover element and is subject to negative pressure
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to an open-end rotor spinning machine (1) comprising a plurality of work stations (2), each having a spinning rotor (21), drive means (22) for driving the spinning rotors (21) at variable speeds, measuring means (23) for detecting yarn breaks, and evaluation means (24) for determining a yarn breakage rate. According to the invention, the open-end rotor spinning machine (1) includes control means (25) configured to regulate the yarn breakage rate, to automatically adjust the speed of a spinning rotor (21) depending on the determined yarn breakage rate, and to regulate the yarn breakage rate so that a predetermined maximum yarn breakage rate is not exceeded.