Spinning Frame Suction Flap Dynamics
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Solution Overview
Problem
Conventional thread suction devices in spinning machines have high energy consumption due to excessive suction capacity, which is unnecessary for most spinning operations since yarn breaks are rare, leading to inefficient energy use and larger, more costly extraction units.
Innovation Solution
A thread suction device with a shut-off mechanism that reduces the air passage cross-section during normal spinning operations and increases suction power only when a yarn break occurs, using a movable cover flap and guide means to manage air flow and suction capacity dynamically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high suction capacity is maintained during normal spinning operations, then yarn breaks can be effectively removed, but energy consumption increases significantly
Solution Approach 1:
The suction opening is equipped with a movable shut-off element (cover flap) that can dynamically adjust the air passage cross-section. During normal operation, the cover flap reduces the opening to minimal size, minimizing energy consumption. When a yarn break occurs, the cover flap opens to allow full suction capacity for effective sliver removal, thus resolving the contradiction between continuous high performance and energy efficiency.
Solution Approach 2:
The air passage cross-section parameter is changed from a fixed large opening to a variable opening that can switch between minimal and full size. This parameter change allows the system to adapt to different operational states (normal vs. yarn break), achieving low energy consumption during normal operation while maintaining high removal capability when needed.
2Reliability
If high suction capacity is designed into the extraction units, then yarn breaks can be handled effectively, but the size and cost of extraction units increase
Solution Approach 1:
The extraction units are designed with dynamic control capability through the cover flap mechanism. The air passage cross-section can be adjusted from minimal to full size as needed, allowing compact extraction units to deliver high suction capacity only when required for yarn break removal, rather than maintaining constant large capacity that would increase size and cost.
Solution Approach 2:
The full suction capacity is applied only partially - specifically during yarn break events rather than continuously. This partial action allows the extraction units to be sized for peak performance needs while operating at minimal capacity during normal conditions, reducing overall equipment size and cost while maintaining effective yarn break handling capability.
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 reduces energy consumption by maintaining a minimal suction capacity during normal operations and increasing it only when needed, allowing for smaller suction units and improved efficiency in yarn removal during breaks, thereby reducing energy costs and equipment size.
Implementation Method 1
a suction force acts on the shut-off element, as a result of which the shut-off element is held by the suction force with a reduction in the air passage cross-section on the suction tube
Implementation Method 2
the shut-off element contains guide means which are such that a compressive force acts on them during the spinning operation
Data Source
Figure 1~11
Figure 2a~2b
Figure 2c~2d
AI summary
The machine has a thread suction opening (103) attached to spinning points. A locking mechanism is provided with a locking body (101) i.e. covering flap. The mechanism is attached at the thread suction opening. The locking body is held against the opening. The locking body comprises a guiding unit (112) in form of tongue, where pressure force acts on the guiding unit, during spinning operation at the points. The body is held at the opening by the pressure force that occurs against resetting force acting on the body under minimizing an air passage section at a thread suction tube (102).