Cryocooler Vibration Damping Unit Integrated With Compression Stator
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Solution Overview
Problem
The addition of vibration cancellation at the end of micro linear compressor Stirling cryocoolers results in a larger structural size, hindering miniaturization and lightweighting, and existing passive damping methods fail to eliminate high-frequency vibrations.
Innovation Solution
A cryocooler design with a compact structure incorporating a vibration damping unit that is coaxially arranged with the compression unit, sharing a stator and magnetic circuit, and utilizing active damping to reduce high-frequency vibrations, featuring a coaxial arrangement of the compression and expansion units within a shell cavity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a vibration cancellation unit is added at the end of the micro linear compressor Stirling cryocooler, then vibration is eliminated, but the structural size increases
Solution Approach 1:
The vibration damping unit is merged with the compression unit by being sleeved on the compression unit and sharing the same stator structure. The second coil for vibration damping is wound on the stator that is already used for compression, combining two functions into one integrated structure rather than adding a separate vibration cancellation unit at the end of the cryocooler.
Solution Approach 2:
The stator serves dual purposes: it acts as both the compression unit stator (with first coil for compression) and the vibration damping unit stator (with second coil for vibration damping). This multi-functional design allows the same structural component to perform both compression and vibration damping functions, reducing overall structural size.
2Device complexity
If passive damping methods are used for vibration cancellation, then结构简单性 is maintained, but high-frequency vibrations cannot be eliminated
Solution Approach 1:
The vibration damping unit uses a second coil wound on the stator that can generate electromagnetic forces in response to vibration. This active damping approach provides feedback control where the electromagnetic field responds to and counteracts high-frequency vibrations, unlike passive damping methods that rely solely on mechanical structures.
Solution Approach 2:
The patent replaces traditional mechanical passive damping structures with an electromagnetic-based active damping system. The second coil generates electromagnetic forces to counteract vibrations, substituting mechanical damping mechanisms with an electromagnetic control system that can effectively handle high-frequency vibrations.
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 design achieves a more compact and lightweight cryocooler with improved vibration damping, specifically eliminating high-frequency vibrations, facilitating miniaturization and enhancing energy efficiency.
Implementation Method 1
utilizing active damping to reduce high-frequency vibrations
Implementation Method 2
sharing a stator and magnetic circuit
Implementation Method 3
first coil located in the first stator
Implementation Method 4
compression unit includes a first stator and a first coil
Implementation Method 5
micro linear compressor Stirling cryocooler system
Data Source
AI summary
A cryocooler includes a shell, a compression unit, an expansion unit and a vibration damping unit, where a cavity is provided in the shell; the compression unit and the vibration damping unit are located in the cavity; the compression unit is connected to the shell; the expansion unit is partially located in the cavity and communicates with the compression unit; the vibration damping unit is sleeved on the compression unit and is partially located in the compression unit and is configured to reduce vibration of the compression unit. The cryocooler has a relatively compact structure, relatively small size and relatively small weight.