Vacuum System Control for Open-End Spinning Yarn Defect Removal
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current spinning machines face inefficiencies in removing defective yarn portions without increasing the power input of the vacuum source, leading to potential yarn contamination and increased operational costs due to the need for high-performance vacuum systems.
Innovation Solution
A method where a control unit manages the connection of work stations to the central vacuum channel, ensuring that the suction nozzle only operates when sufficient vacuum capacity is available, and temporarily disconnects stations if capacity is insufficient, allowing for efficient removal of defective yarn without a high-performance vacuum source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the rated power input of the vacuum source is increased to handle simultaneous suction at multiple work stations, then the suction capacity is improved, but the cost of the spinning machine and operation significantly increases
Solution Approach 1:
The vacuum system dynamically adapts its capacity based on the number of work stations requiring suction. The control unit activates additional vacuum sources only when needed, allowing the system to scale its power consumption according to actual demand rather than providing maximum capacity continuously.
Solution Approach 2:
The vacuum system is divided into multiple independent vacuum sources, each capable of serving one or more work stations. This segmentation allows the system to activate only the necessary number of vacuum sources based on current operational needs, avoiding the cost of a single oversized vacuum system.
2Productivity
If multiple work stations are attended simultaneously, then the productivity is improved, but the vacuum capacity becomes insufficient
Solution Approach 1:
The system dynamically adjusts vacuum capacity by activating additional vacuum sources when multiple work stations require simultaneous attention. The control unit monitors the number of active suction operations and scales vacuum power accordingly, enabling higher productivity without permanent over-provisioning of vacuum capacity.
Solution Approach 2:
The control unit proactively manages vacuum source activation based on predicted or current demand. When work stations are attended simultaneously, the system prepares and activates additional vacuum sources in advance to ensure sufficient capacity is available before suction operations begin.
3Power
If a high-performance vacuum source is used to ensure sufficient vacuum capacity, then the vacuum capacity is improved, but the operational costs increase
Solution Approach 1:
The vacuum system operates dynamically, activating additional vacuum sources only when multiple work stations require simultaneous suction. This avoids the continuous energy consumption of a single high-performance vacuum source running at full capacity, reducing operational costs while maintaining sufficient vacuum capacity when needed.
Solution Approach 2:
Instead of always providing excessive vacuum capacity through a single high-power source, the system applies partial action by activating only the necessary number of vacuum sources based on current demand. This reduces energy consumption while ensuring sufficient capacity is available when multiple work stations are attended simultaneously.
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 approach ensures efficient removal of defective yarn portions without the need for a high-performance vacuum source, minimizing downtime and operational costs while maintaining yarn quality.
Implementation Method 1
A spinning machine is at each work station provided with a suction nozzle (2), which is connected to a central vacuum channel (3) of a vacuum system of the spinning machine
Data Source
Figure 1
AI summary
The invention relates to a method for removing the faulty yarn portion at a work station of an open-end spinning machine after the work station is stopped in a controlled manner, particularly after a defect of the spun yarn is detected by a sensor (1) of yarn quality, whereby prior to the request to connect a suction nozzle (2) of a work station for sucking off of the faulty yarn portion the value of the vacuum in the central channel (3) of the vacuum system of an open-end spinning machine is found out and evaluated and the suction nozzle (2) of a work station is connected to the central vacuum channel (3) only after the current capacity of the vacuum source detected is sufficient or only after a sufficiently high vacuum is achieved. The invention also relates to a device for removing the faulty yarn portion at a work station of an open-end spinning machine.