Micro-nano Fluid Damper Shear Thinning Damping
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Solution Overview
Problem
Conventional dampers, especially semi-active ones, face issues with durability, high maintenance costs, and inaccurate control of damping force due to the complexity of electric/magnetic fields and particle arrangement, leading to inefficient impact absorption and energy dissipation.
Innovation Solution
A micro-nano fluid damper is developed, utilizing a sleeve and piston assembly with micro-nano fluid containing suspended particles that exhibit shear thinning and thickening thresholds, enhancing viscosity and damping force, allowing for effective impact absorption and thermal energy dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If semi-active dampers use electric/magnetic fields to control damping force, then the damping force can be adjusted actively, but the device complexity and maintenance cost increase significantly
Solution Approach 1:
The patent replaces electric/magnetic field control systems with a purely mechanical passive control system. The microparticle-filled fluid damper uses mechanical elements (piston, valve, spring) to achieve adaptive damping force adjustment without requiring external power sources or complex electromagnetic control systems, thereby reducing device complexity while maintaining adjustability
Solution Approach 2:
The damper system achieves self-regulation through the interaction between the microparticle-filled fluid and the mechanical components. The particles automatically adjust their arrangement based on flow conditions and pressure differences, enabling the system to adapt to varying loads and speeds without external control input, thus eliminating the need for complex control systems
2Force
If conventional fluid dampers use high viscosity fluid to increase damping force, then impact absorption improves, but thermal conduction decreases and energy dissipation becomes less efficient
Solution Approach 1:
The patent uses a composite fluid consisting of a base fluid mixed with microparticles (such as metal particles or ceramic particles). This composite structure combines the viscous properties of the base fluid for damping force generation with the high thermal conductivity of the microparticles for efficient heat dissipation, thereby simultaneously improving both damping performance and thermal management
Solution Approach 2:
The patent modifies the physical and chemical parameters of the working fluid by adding microparticles with specific properties (size, shape, material composition, concentration). By adjusting these parameters, the fluid achieves optimal balance between viscosity for damping force and thermal conductivity for heat dissipation efficiency
3Reliability
If passive dampers are used to ensure durability and stability, then maintenance cost reduces, but the ability to adapt to varying conditions is limited
Solution Approach 1:
The patent introduces dynamic characteristics into the passive damper system through the microparticle-filled fluid. The particles dynamically rearrange themselves in response to changing flow conditions, pressure differences, and shear rates, enabling the damper to adapt its damping characteristics to varying loads and speeds while maintaining the simplicity and reliability of a passive system without active control components
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 micro-nano fluid damper achieves improved impact absorption and energy dissipation by modulating viscosity based on shear strain rate, providing a more stable and efficient damping solution with enhanced thermal conduction, reducing maintenance costs and improving durability compared to conventional systems.
Implementation Method 1
The function of the conventional damper is for shock absorbing, deceleration, and energy dissipation... by the viscous force of liquid or a solid
Implementation Method 2
The energy that the damper consumes will be transformed into thermal energy
Implementation Method 3
the micro-nano fluid has a shear thinning threshold and a shear thickening threshold
Implementation Method 4
the micro-nano fluid has a shear thinning threshold and a shear thickening threshold
Implementation Method 5
effectively enhances the viscosity and thermal conduction of the micro-nano fluid
Data Source
AI summary
A micro-nano fluid damper includes a sleeve, a piston assembly and a micro-nano fluid. The sleeve has an accommodating space. The piston assembly has a piston head and at least one piston rod. The piston assembly is movably disposed in the accommodating space. The piston rod extends out of the sleeve from a side of the piston head. The micro-nano fluid is filled between the sleeve and the piston assembly, and the micro-nano fluid flows in the accommodating space by the back-and-forth movement of the piston. When a shear strain rate of the micro-nano fluid is greater than 1s−1, an exponent of velocity of the micro-nano fluid damper is less than 1, and the micro-nano fluid has a shear thinning threshold and a shear thickening threshold.