Adjustable Oscillation Damper Check Valve Support
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Solution Overview
Problem
Existing vibration dampers with adjustable damping force have a large receptacle tube diameter due to the use of an annular check valve, which restricts space and flow efficiency.
Innovation Solution
The check valve body is supported indirectly at the connection orifice, eliminating the need for additional holding surfaces on the intermediate tube, and features a permanently open through-opening with radially offset return flow orifices to minimize space and restrict flow as little as possible, allowing for a more compact design and efficient fluid return.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an annular check valve is used in the intermediate tube, then the damping function is achieved, but the receptacle tube diameter becomes large
Solution Approach 1:
The check valve body is repositioned from the intermediate tube to the connection orifice region, changing its spatial location from a longitudinal arrangement to a radial arrangement. This dimensional repositioning allows the check valve to be supported at the connection piece rather than requiring space in the intermediate tube, thereby reducing the receptacle tube diameter while maintaining the damping function.
Solution Approach 2:
The check valve body is nested within the connection piece structure, with the check valve body being supported at the connection orifice. The guide sleeve of the check valve body overlaps the connection piece axially, creating a compact nested arrangement that eliminates the need for separate holding surfaces on the intermediate tube, thus reducing overall diameter.
2Stability of the object's composition
If the check valve body is supported at the intermediate tube, then the check valve is stable, but the flow cross section is restricted
Solution Approach 1:
The check valve body is repositioned to be supported at the connection orifice rather than the intermediate tube. This spatial repositioning allows the permanently open through-opening to be arranged without restriction, maximizing the flow cross section for return flow from the compensation space into the working space while maintaining stability through the guide sleeve and supporting surface.
3Reliability
If holding surfaces are provided on the intermediate tube, then the check valve is securely mounted, but the intermediate tube diameter must be larger
Solution Approach 1:
The mounting function for the check valve is merged with the connection piece structure. The check valve body is supported at the connection orifice formed by the connection piece, eliminating the need for separate holding surfaces on the intermediate tube. This merging of functions allows the intermediate tube diameter to be reduced while maintaining secure check valve mounting.
Solution Approach 2:
The connection piece is given multiple functions: it forms the connection orifice and simultaneously provides the supporting surface for the check valve body. This multi-functionality eliminates the need for additional holding surfaces on the intermediate tube, reducing the overall diameter requirement while ensuring reliable check valve mounting.
4Volume of stationary object
If the check valve body is compactly arranged, then the overall diameter is reduced, but the return flow may be restricted
Solution Approach 1:
The return flow orifices are arranged radially outside the permanently open through-opening in the check valve body. This radial arrangement in a different dimension allows the check valve body to have a compact shape that reduces overall diameter while the radially offset return flow orifices maintain adequate flow cross section for return flow, preventing cavitation.
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
This configuration reduces the overall diameter of the vibration damper, prevents cavitation, and maintains flow efficiency, enabling a more compact and effective damping system with enhanced piston rod displacement.
Implementation Method 1
The check valve serves for guiding flow between the adjustable damping valve, a fluid channel between a working space and the connected damping valve, and a compensation space
Implementation Method 2
The closing spring provides for a defined operating position of a check valve disk and, therefore, for a defined manner of operation
Implementation Method 3
a first adjustable damping valve for damping an extending movement of a piston rod and a second damping valve for damping a retracting movement of a piston rod
Data Source
AI summary
An adjustable vibration damper comprises at least one adjustable damping valve for each working direction. A fluid connection between a compensation space and a working space is controlled by a check valve which has a check valve body and which is hydraulically connected in parallel with the adjustable damping valve. The check valve is held by an intermediate tube which forms the fluid connection and which has a connection orifice to the connected adjustable damping valve. The check valve body of the check valve is supported at least indirectly in the region of the connection orifice.