Cryogenic Magnetic Damper Eddy Current Enhancement
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Magnetic dampers used in linear vibration damping applications are relatively heavy when not operated at cryogenic temperatures, limiting their weight and volume efficiency in various applications.
Innovation Solution
A damping apparatus comprising a magnet, a conducting member movable relative to the magnet, and a channel that confines cryogenic fluid in contact with the conducting member, maintaining it at cryogenic temperatures to enhance the damping force provided to a payload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If magnetic dampers operate at room temperature, then device complexity is reduced, but weight increases and damping force decreases
Solution Approach 1:
The patent applies parameter changes by cooling the conducting member to cryogenic temperatures (e.g., liquid nitrogen temperature of 77K or lower). This temperature parameter change increases the electrical conductivity of the conducting member, which in turn enhances the damping force generated through eddy currents while reducing the overall system weight for achieving equivalent damping performance
Solution Approach 2:
The patent employs composite material strategies by combining the conducting member with cryogenic cooling infrastructure, including thermal coupling elements and insulation materials. This composite approach enables the conducting member to maintain cryogenic temperatures while integrated within the magnetic damper structure, achieving both weight reduction and enhanced damping performance
2Productivity
If magnetic dampers operate at room temperature, then ease of operation is improved, but damping force and volume efficiency deteriorate
Solution Approach 1:
The patent applies parameter changes by cooling the conducting member to cryogenic temperatures (e.g., liquid nitrogen temperature of 77K or lower). This temperature parameter change increases the electrical conductivity of the conducting member, which in turn enhances the damping force generated through eddy currents while reducing the overall system weight for achieving equivalent damping performance
Solution Approach 2:
The patent replaces conventional mechanical damping mechanisms with a cryogenic-enhanced electromagnetic damping system. By substituting room-temperature magnetic damping with cryogenic-cooled electromagnetic damping, the system achieves superior damping force and volume efficiency through enhanced eddy current effects at low temperatures
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 the damping force while achieving weight and volume efficiencies, suitable for applications such as ground test vibrations, vehicle vibrations, and precision equipment, by maintaining the conducting member at cryogenic temperatures using cryogenic fluids like liquid or gaseous Nitrogen, Neon, or Helium.
Implementation Method 1
The cryogenic fluid may maintain the conducting member at cryogenic temperatures, thereby increasing a damping force provided by the conducting member to a payload
Implementation Method 2
magnetic dampers can operate more consistently over wider temperature ranges than fluidic dampers
Implementation Method 3
magnetic dampers can operate more consistently over wider temperature ranges than fluidic dampers
Data Source
AI summary
A damping apparatus is disclosed having at least one magnet, a conducting member movable relative to the magnet, a cryogenic fluid, and a channel that confines the cryogenic fluid in contact with the conducting member. The cryogenic fluid may maintain the conducting member at cryogenic temperatures, thereby increasing a damping force provided by the conducting member to a payload.