Active Mass Damper for Winding Roll Vibration Control
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Solution Overview
Problem
Roll winding devices experience vibrations due to harmonics of the winding speed matching natural frequencies, leading to degraded roll quality and potential ejection, which reduces productivity as current solutions either require reducing winding speed or result in ineffective damping.
Innovation Solution
Incorporating an absorber arrangement with active and passive dampers in the pressure roller device, coupled with sensors and actuators, to actively dampen vibrations and maintain contact with the winding roll, ensuring consistent force and minimizing dynamic nip force fluctuations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure roller device rests on the winding roll to prevent ejection, then roll stability is improved, but the pressure roller device itself begins to oscillate and degrade roll quality
Solution Approach 1:
A vibration absorber is introduced as an intermediary component between the pressure roller device and the winding roll. This absorber contains a mass that can move relative to the pressure roller device, acting as a mediator to absorb vibrations and prevent them from being generated by the pressure roller device itself, thus resolving the oscillation problem while maintaining stability
2Object-affected harmful factors
If winding speed is reduced to avoid resonance vibrations, then vibration amplitude is reduced, but productivity decreases
Solution Approach 1:
The invention utilizes controlled mechanical vibration through a vibration absorber that contains a movable mass. This absorber is tuned to resonate at specific frequencies to counteract and cancel out the harmful vibrations caused by resonance between winding speed harmonics and natural frequencies of the roll winding device, allowing high winding speeds to be maintained without excessive vibration
3Object-generated harmful factors
If active feedback damping is applied to dampen vibrations, then vibration control is improved, but device complexity increases
Solution Approach 1:
The vibration absorber is designed as a passive, self-regulating system that automatically adjusts to vibration conditions without requiring external control. The movable mass within the absorber naturally responds to vibrations through inertial forces, providing automatic vibration cancellation without sensors, controllers, or power supplies, thus avoiding the complexity of active feedback systems
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 absorber arrangement effectively dampens vibrations across the roll winding device, preventing roll ejection and maintaining high productivity by ensuring consistent contact and reduced frictional variations, thus enhancing roll quality and operational efficiency.
Implementation Method 1
the absorber arrangement initially has a dampening effect on vibrations that occur on the pressure roller device
Implementation Method 2
When harmonics of the winding speed meet natural frequencies of the roll winder, the vibration amplitudes at these frequencies are amplified
Implementation Method 3
If the pressure roller device is also provided with an absorber arrangement, then it can be ensured that vibrations in which the winding roll temporarily lifts too far from the elements forming the winding bed are damped or avoided
Implementation Method 4
at least one active absorber is connected to a sensor arrangement which determines an acceleration in the pressure roller device
Data Source
Figure 1~2
AI summary
The winding device (1) has a winding bed and a pressing roller device (10), which is arranged above a winding roller (5) and comprises a mass damper arrangement with mass dampers (13, 16). A pressing roller (11) is arranged in a carrier (12). The mass dampers are arranged in middle of the carrier. The damper arrangement acts on the carrier. The mass dampers are formed as active mass dampers, which are connected with a sensor e.g. acceleration sensor and force sensor, arrangement. The sensor arrangement determines acceleration in the roller device.