Rolling Stand Dissipator Layout for Direct Hydraulic Vibration Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vibration dampers for roll stands in metal rolling processes are inefficient in eliminating undesirable pressure fluctuations and often require complex mechanical designs with additional hydraulic lines and deflections, which can lead to resonance issues and reduced service life.
Innovation Solution
A compact dissipator with frequency-dependent damping, directly connected to the adjusting cylinder via an intermediate piece, utilizing hydraulic inductance, resistance, and capacity to absorb and dissipate vibration energy, minimizing unwanted reflections and parasitic inductances, and featuring an adjustable valve for optimal damping effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vibration damper is connected via additional hydraulic lines and deflections, then the vibration energy can be transmitted to the damper, but resonance issues occur and service life is reduced
Solution Approach 1:
The dissipator is integrated directly into the adjusting cylinder, merging the vibration damping function with the existing cylinder structure. This eliminates the need for separate hydraulic lines and deflections, thereby reducing device complexity while avoiding resonance issues that would reduce service life
Solution Approach 2:
The dissipator acts as an intermediary element within the cylinder, providing a direct pathway for vibration energy dissipation without requiring external hydraulic connections. This intermediary structure transmits vibration energy efficiently while avoiding the resonance problems associated with complex hydraulic line configurations
2Device complexity
If a dissipator is designed with compact form, then space is saved and mechanical complexity is reduced, but effective vibration damping may be compromised
Solution Approach 1:
The dissipator is nested within the adjusting cylinder structure, utilizing the existing cylindrical space. This nesting approach allows the dissipator to maintain its compact form while effectively damping vibrations, as it is positioned directly within the pressure chamber where vibration energy is generated
Solution Approach 2:
The dissipator utilizes hydraulic principles with a piston and fluid chamber configuration. The hydraulic fluid provides the damping medium, allowing effective vibration energy dissipation in a compact volume. The hydraulic mechanism converts vibration energy into fluid pressure variations, achieving reliable damping without increasing mechanical complexity
3Ease of operation
If the dissipator is positioned away from the vibration source, then installation is easier, but vibration damping effectiveness is reduced
Solution Approach 1:
The dissipator is merged with the adjusting cylinder assembly, positioned directly at the vibration source within the pressure chamber. This integration ensures maximum vibration damping effectiveness while maintaining ease of installation, as the dissipator is installed as part of the cylinder assembly rather than as a separate remote component
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
Effectively dampens vibrations near the source, reducing resonance and extending the service life of roll stand components by shifting pressure fluctuations into the dissipator's hydraulic volume, where they are amplified without being disruptive, and allowing for flexible adaptation to changing vibration frequencies.
Implementation Method 1
a hydraulic capacitance (23) having a hydraulic volume for holding hydraulic fluid
Implementation Method 2
a hydraulic inductance (21) having a hydraulic volume for holding hydraulic fluid
Implementation Method 3
a hydraulic resistance (22) arranged in series to the hydraulic inductance (21)
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The invention relates to a dissipator (1) comprising a hydraulic inductor (21), a hydraulic resistance (22), and a hydraulic capacitance (23) for damping vibrations on a rolling mill stand for the production of flat metallic rolled products. The dissipator (1) has an intermediate section (20) with a first hydraulic interface (24) for direct hydraulic-mechanical connection to an actuating cylinder (2) of the rolling mill stand. A valve block (6) with a control valve (11) for the actuating cylinder (2) can be directly hydraulically-mechanically connected to the dissipator (1) via a second hydraulic interface (26). The intermediate section (20) can be designed as a rigid block to which the hydraulic resistance (22) and the hydraulic capacitance (23) are detachably fluidically connected.The hydraulic inductance (21) is preferably introduced into the block as a tubular cavity and fluidically connected to the first and second hydraulic interfaces (24, 26).