Solid Spring Piston Structure for Compact High-Pressure Damping
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Solution Overview
Problem
Conventional spring devices with gas-filled foam cavities are limited in absorbing high pressures due to the low bulk modulus of gases, making them unsuitable for compact designs that require elastic springing and damping of high forces.
Innovation Solution
A spring device with a piston and housing featuring a compressible solid body spring element made of a solid material, such as polyethylene, that is compressed when the piston moves, allowing for higher force absorption without increasing the device size, with conical or concave surfaces on the piston for optimal pressure distribution and reduced temperature increases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If gas-filled foam cavities are used for springing and damping, then the device can be compact, but the maximum pressure absorption is limited to less than 1 MPa
Solution Approach 1:
The patent changes the physical state of the damping medium from gas-filled foam to solid material (such as polyethylene). This parameter change fundamentally alters the bulk modulus from less than 1 MPa for gases to several hundred MPa for solids, enabling high pressure absorption while maintaining compact device dimensions.
2Force
If the cavity volume is reduced to absorb high forces, then force absorption increases, but temperature increases significantly due to gas compression
Solution Approach 1:
The patent changes the material parameter from gas to solid material for the damping medium. Solid materials have different thermodynamic properties during compression, exhibiting significantly lower temperature increases under high-force conditions compared to gas compression, thus enabling force absorption without excessive heating.
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
Enables the absorption of high forces with minimal volume changes and reduced temperature increases, providing a compact and robust design suitable for high-pressure applications without the need for larger sizes or additional sealing elements.
Implementation Method 1
a compressible solid body spring element which is arranged in the cavity and consists of a solid material that can be compressed by the piston
Implementation Method 2
at least one surface of the piston which faces the solid body spring element is formed conical or concave, such that on a reduction of the cavity, force components acting on compression are oriented inwardly
Data Source
AI summary
The present disclosure concerns a spring device with a piston and a housing into which the piston can be introduced in a movement direction. A cavity is formed between the piston and the housing, in which cavity a compressible solid body spring is arranged that consists of a solid body that can be compressed by the piston. At least one surface of the piston that faces the solid body spring is conical or concave. The disclosure furthermore concerns a securing device comprising such a spring device and the use thereof, in particular for a container closing plug.