Package Cradle Friction Damping for Leak-Free Stable Winding
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Solution Overview
Problem
Existing vibration-damping apparatuses for pivotably mounted package cradles in textile machines are prone to soiling and hydraulic fluid leakage, and their damping effectiveness is compromised, leading to unstable package cradles and unusable cross-wound packages.
Innovation Solution
A friction damper with direction-dependent friction forces is employed, where the friction force during the lifting off of the cross-wound package is greater than during its return, minimizing soiling risks and ensuring stable cradle vibration damping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If hydraulic damping apparatuses are used to reduce package cradle vibrations, then vibration damping effectiveness is improved, but the risk of damping medium leakage and soiling increases
Solution Approach 1:
The patent replaces the hydraulic damping system with a purely mechanical friction-based damping apparatus. The friction damper uses a friction element that presses against a friction surface through a spring mechanism, eliminating hydraulic fluid and sealing components that are prone to leakage. This mechanical substitution resolves the contradiction by maintaining vibration damping effectiveness through friction forces while completely eliminating the risk of damping medium leakage and soiling.
2Object-affected harmful factors
If friction dampers are used to eliminate hydraulic fluid leakage, then soiling risk is reduced, but direction-dependent friction control becomes necessary
Solution Approach 1:
The patent applies asymmetry by designing the friction damper to produce different friction forces in different directions. The spring-loaded friction element is positioned and angled such that it exerts greater friction force during the lifting-off phase of package winding and reduced friction force during the return phase. This asymmetric friction control is achieved through the geometric arrangement of the friction element, support lever, and spring, eliminating the need for complex active control mechanisms while meeting the directional damping requirements.
3Reliability
If hydraulic cylinders with sealing rings are used, then damping medium containment is improved, but fire hazard in conjunction with fibre dust increases
Solution Approach 1:
The patent eliminates hydraulic cylinders and sealing rings entirely by substituting them with a mechanical friction damping system. The damping function is achieved through friction between solid surfaces (friction element and friction surface) actuated by a spring mechanism. This substitution removes all hydraulic fluid and sealing components that could leak and create fire hazards when mixed with textile fibre dust, resolving the contradiction by maintaining damping containment through mechanical means without introducing fire risks.
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
The friction damper effectively stabilizes the package cradle by enhancing friction during lifting, reducing the risk of soiling and hydraulic fluid leakage, and can be retrofitted with minimal modifications to existing machines, maintaining stable winding operations.
Implementation Method 1
a friction damper (20), which has friction forces of different intensity depending on the working direction
Data Source
AI summary
The invention relates to a vibration-damping apparatus (18) for a winding device (4) of a textile machine (1), which textile machine produces cross-wound packages (5), the vibration-damping apparatus being provided for reducing the vibrations that occur at the pivotably mounted package cradle (8) during the winding operation of the textile machine (1).According to the invention, in order to obtain a vibration-damping apparatus which is unproblematic both with regard to safety and with regard to contamination and which also always ensures a vibrationally relatively stable state of the package cradle, the vibration damper is in the form of a friction damper (20) having friction forces of different intensity depending on the working direction, the friction forces acting as the cross-wound package (5) lifts off during the winding operation being greater than the friction forces acting during the return of the cross-wound package (5).