Magnetorheological Particle Damper With Multi-Size Impactors
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Solution Overview
Problem
Traditional impact dampers have limited vibration reduction effectiveness due to short working time, few collisions, and poor energy dissipation, primarily relying on energy exchange and friction during collisions, and most monomer impact dampers consist of uniform particles leading to inefficient energy dissipation.
Innovation Solution
A magnetorheological fluid particle impact damper with a cylindrical damper cavity unit equipped with electromagnetic coils, horizontal and disc-type shock absorbers connected via springs, and magnetorheological fluid cavities filled with particles of varying sizes, allowing for controlled viscosity and enhanced vibration absorption through adjustable magnetic fields and tuned stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If traditional impact dampers use uniform particles, then the structure is simple, but the number of collisions is few and energy dissipation is poor
Solution Approach 1:
The patent applies local quality by using particles of different sizes (multi-size distribution) within the impactor assembly. This creates local variations in particle properties, allowing different particles to collide at different times and locations, thereby increasing the total number of collisions and improving energy dissipation without requiring a completely complex device structure.
2Duration of action of moving object
If traditional impact dampers rely on collision friction, then the structure is simple, but the working time is short and vibration reduction effect is moderate
Solution Approach 1:
The patent replaces the purely mechanical collision-friction system with a magnetorheological fluid system. The magnetorheological fluid can be controlled by magnetic fields to change its viscosity and damping characteristics, extending the working time and enhancing vibration reduction effects beyond what simple mechanical friction can achieve.
Solution Approach 2:
The patent changes the physical parameters of the damping medium by using magnetorheological fluid whose viscosity can be dynamically adjusted through magnetic field strength. This allows the damper to maintain effective damping over longer periods and adapt to different vibration conditions, significantly extending the working time compared to traditional mechanical dampers.
3Reliability
If monomer impact dampers are used, then the cost is low, but the vibration reduction effectiveness is limited
Solution Approach 1:
The patent merges multiple impactors of different sizes into a single integrated impact damper assembly. This combination allows simultaneous multi-point collisions with the damper cavity wall, significantly improving vibration reduction effectiveness compared to single impactors, while maintaining a relatively compact and cost-effective structure.
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 effectively increases vibration absorption range, reduces peak displacement and acceleration, and improves vibration reduction by enabling faster stabilization under external excitation and efficient energy dissipation in various environments.
Implementation Method 1
the horizontal impactor container is internally provided with a first impactor group consisting of several impactors of different sizes; the disc-type impactor container is internally provided with a second impactor group; and the horizontal magnetorheological fluid cavity and the disc-type magnetorheological fluid cavity are both filled with magnetorheological fluid
Implementation Method 2
the damper cavity unit is provided with an electromagnetic coil in a circumferential direction
Implementation Method 3
the horizontal shock absorber and the disc-type shock absorber are respectively connected to the inner wall of the damper cavity unit through springs
Implementation Method 4
The impact damper belongs to the passive control technology of vibration. The main working principle is the damper which realizes momentum exchange and structural energy dissipation through the collision and friction between the impactors, and between the impactor and the receiving cavity
Data Source
AI summary
Disclosed is a magnetorheological fluid particle impact damper, which includes a damper cavity unit, wherein the damper cavity unit is provided with an electromagnetic coil in a circumferential direction, the damper cavity unit is internally provided with a plurality of horizontal shock absorbers in a uniform manner, and the left and right ends of the damper cavity unit are symmetrically provided with disc-type shock absorbers; the shock absorbers and the disc-type shock absorbers are respectively connected to the inner wall of the damper cavity unit through springs; the horizontal shock absorber includes a horizontal magnetorheological fluid cavity filled with magnetorheological fluid, the horizontal magnetorheological fluid cavity is internally provided with a horizontal impactor container, the horizontal impactor container is internally provided with a first impactor group consisting of several impactors of different sizes; the disc-type shock absorber comprises a disc-type magnetorheological fluid cavity which is filled with magnetorheological fluid; the disc-type magnetorheological fluid cavity is slidably connected to a plurality of disc-type impactor containers, and the disc-type impactor containers are distributed in a circular array and internally provided with a second impactor group; and the present disclosure effectively improves the vibration reduction effect.