Damping Device for Storage Belt Vibration Control
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Solution Overview
Problem
Existing compensation devices for fluctuating conveying speeds in fleece production cause vibrations in the storage belt, leading to adverse effects on the material web quality due to oscillations and potential lifting or swirling of fibers.
Innovation Solution
A compensation device with a damping system positioned at a distance from the storage belt to absorb vibrations, ensuring the damping device is closer than the expected oscillation amplitude, thereby preventing energy loss and maintaining vibration-free operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the storage belt is used to compensate for fluctuating conveying speeds, then the speed differences between inlet and outlet can be compensated, but vibrations occur in the storage belt that adversely affect material web quality
Solution Approach 1:
A damping device is introduced as an intermediary element between the storage belt and the surrounding environment. This damping device absorbs and dissipates the vibrations generated by the storage belt during speed compensation operations, preventing these vibrations from being transmitted to the material web and causing quality defects.
Solution Approach 2:
The vibrations and oscillations that naturally occur during storage belt operation are not merely suppressed but are converted into a beneficial damping effect. The damping device utilizes these vibrations to activate its energy dissipation mechanisms, transforming the harmful oscillatory energy into heat or other non-harmful forms, thereby protecting the material web quality.
2Object-affected harmful factors
If the damping device is positioned close to the storage belt to effectively damp vibrations, then vibration suppression is improved, but friction losses increase during normal operation
Solution Approach 1:
The damping device is designed with dynamic positioning capability, allowing it to adjust its distance from the storage belt based on operational conditions. During high-speed operation where vibrations are minimal, the damping device is positioned farther away to reduce friction losses. During acceleration and deceleration phases where vibrations are significant, the damping device moves closer to maximize vibration suppression effectiveness.
Solution Approach 2:
The damping device operates in a periodic manner, engaging with the storage belt only during specific phases of operation when vibrations are most problematic (acceleration and deceleration). During steady-state constant speed operation, the damping device disengages or maintains a larger distance, eliminating unnecessary friction losses while still providing protection during critical transition phases.
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 damping device effectively suppresses vibrations, ensuring a high-quality fleece production by preventing oscillations and maintaining a stable material web structure, even at high conveying speeds.
Implementation Method 1
a damping device which is arranged in the region of the variable sag at a distance from the storage strip that is smaller than the oscillation amplitude of vibrations of the storage strip to be expected in the region of the variable sag
Data Source
Figure 1~2
Figure 3
Figure 4
AI summary
A compensation device (1) according to the invention for compensating for fluctuating conveying speeds of a material web (16), in particular a woven or nonwoven web, comprises an endlessly circulating storage belt (2), wherein the storage belt (2) has a variable sag (4) and is guided over two deflection rollers (6), wherein the variable sag (4) of the storage belt (2) is arranged at least between the two deflection rollers (6). The compensation device (1) further comprises a damping device (14) which is arranged in the region of the variable sag (4) at a distance (D) from the storage belt (2) that is smaller than the vibration amplitude (A) of vibrations (18) expected of the storage belt (2) in the region of the variable sag (4).