Magnetic Dynamic Damping Assembly with Active Field Control
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Solution Overview
Problem
Conventional damping assemblies lack the ability to tune damping force requirements between active and inactive conditions, particularly in situations with varying vibration amplitudes and frequencies, failing to provide satisfactory dynamic decoupling.
Innovation Solution
A magnetically dynamic damping assembly with a housing containing a fixed magnetic source, an elastic diaphragm with magnetically actuated elements, and magnetorheological fluid, where the magnetic guide routes the magnetic field to prevent interference and allows variable flexibility based on magnetic field strength, enabling adjustable damping through electrical current control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional damping assemblies use fixed decouplers (elastic diaphragms) to passively dampen vibrations, then vibration isolation is achieved, but the damping force cannot be tuned or adjusted for varying vibration conditions
Solution Approach 1:
The patent applies the Dynamics principle by replacing the fixed, passive elastic diaphragm with an active magnetic field-based decoupler system. The magnetic field strength can be dynamically adjusted through electrical current control, allowing the damping force to be tuned in real-time according to varying vibration conditions. This transforms a static damping system into a dynamic one that can adapt to different operating scenarios.
Solution Approach 2:
The patent implements Parameter changes by utilizing the relationship between electrical current and magnetic field strength. By varying the electrical current supplied to the magnetic actuator, the magnetic field strength changes, which directly controls the damping force of the decoupler. This enables continuous adjustment of damping parameters without mechanical reconfiguration.
2Adaptability or versatility
If magnetic fields are used to actuate the decoupler for dynamic damping adjustment, then damping tunability is achieved, but magnetic interference may affect other components such as magnetorheological fluid
Solution Approach 1:
The patent applies Segmentation by spatially separating the magnetic field generation zone from the magnetorheological fluid chamber. The magnetic actuator and magnetic field pathways are positioned and configured to isolate the magnetic field effects to specific regions, preventing magnetic interference from reaching the magnetorheological fluid while still enabling effective decoupler actuation.
Solution Approach 2:
The patent uses magnetic guides or magnetic shielding structures as intermediaries to channel and contain the magnetic field. These intermediary components direct the magnetic flux along predetermined paths, ensuring that the magnetic field reaches the decoupler actuator while being blocked or redirected away from sensitive components like the magnetorheological fluid.
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 solution provides increased tuning capabilities for damping assemblies, allowing for variable flexibility and movement of the diaphragm based on magnetic field strength, effectively addressing the limitations of prior art by enabling dynamic adjustment of damping forces in response to varying vibration conditions.
Implementation Method 1
A source of electrical current energizes the magnetically actuated element, the fixed magnetic source, or both and either repels or pulls the magnetically actuated element with respect to the fixed magnetic source
Implementation Method 2
The damping unit contains magnetorheological fluid and includes flow paths and a solenoid adjacent to said flow paths changing the viscosity of said magnetorheological fluid entering said flow paths
Implementation Method 3
When one of the sub-chambers is subjected to increased pressure, the diaphragm flexes into the other sub-chamber, passively stifling vibrational forces
Data Source
Figure 1
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Figure 3A
AI summary
An assembly for magnetically dynamic damping useful for isolating vibrational forces includes a housing wall (22) bounding a main chamber (28) therein. The assembly further includes a fixed magnetic source (70) disposed in the main chamber (28). A diaphragm (62) of elastic material is disposed in the assembly impermeably dividing the main chamber (28) into sub-chambers (32, 34). The diaphragm (62) includes a magnetically actuated element (72) adjacent to the fixed magnetic source (70). A source of electrical current (94) energizes the magnetically actuated element (72), the fixed magnetic source (70), or both and either repels or pulls the magnetically actuated element (72) with respect to the fixed magnetic source (70). A magnetic guide (76) surrounds the fixed magnetic source (70) and defines a gap (82) exposing the fixed magnetic source (70) to the magnetically actuated element (72). The magnetic guide (76) routes the magnetic field towards the gap (82) and prevents outward magnetic interference to the rest of the assembly.