Parallel Flow Path Damper Structure for Stroke Reversal Noise
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Solution Overview
Problem
Damping force generation devices experience abnormal noise due to inadequate suppression mechanisms.
Innovation Solution
A damping force generation device with a piston that divides the cylinder into chambers and includes a first flow path connected between them, along with a second flow path parallel to the first and a pressure storage portion with a changeable volume, utilizing an O-ring to manage pressure storage and reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional damping force generation device is used, then damping function is provided, but abnormal noise occurs during stroke reversal
Solution Approach 1:
The damping force generation device is segmented into multiple independent flow paths (first flow path and second flow path) with different valve mechanisms. This segmentation allows each path to handle specific stroke reversal conditions independently, preventing abnormal noise while maintaining damping function through distributed flow control
Solution Approach 2:
A third flow path is introduced as an intermediary connection between the first and second chambers, branching from the second flow path. This intermediary path provides an alternative flow route during stroke reversal, mediating pressure changes and preventing the abnormal noise that occurs in conventional single-path designs
2Object-affected harmful factors
If flow rate of working fluid is reduced to minimize noise, then noise is suppressed, but sealing efficiency may be affected
Solution Approach 1:
The valve mechanisms in both flow paths are designed to dynamically adjust opening and closing based on pressure differential and stroke direction. This dynamic control allows the system to maintain optimal flow rates for sealing while suppressing noise during stroke reversal when pressure changes are most problematic
Solution Approach 2:
Different flow paths are designed with different local characteristics - the first flow path with its valve mechanism handles primary damping, while the second flow path with the third flow path branching provides noise suppression during stroke reversal. Each path has optimized local flow properties suitable for its specific function
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
Effectively suppresses abnormal noise during stroke reversal and improves sealing properties, reducing the flow rate of the working fluid, thereby minimizing noise and enhancing the device's sealing efficiency.
Implementation Method 1
a first regulation member configured to divide an inside of a tubular member into a first chamber and a second chamber and have a first flow path connected between the first chamber and the second chamber; and a second regulation member having a second flow path provided at least partially parallel to the first flow path and connected between the first chamber and the second chamber
Implementation Method 2
a third flow path branching from the second flow path and connected to a pressure storage portion whose volume is changeable
Data Source
AI summary
A damping force generation device includes: a first regulation member configured to divide the inside of a tubular member into a first chamber and a second chamber and have a first flow path connected between the first chamber and the second chamber; and a second regulation member having a second flow path provided at least partially parallel to the first flow path and connected between the first chamber and the second chamber and a third flow path branching from the second flow path and connected to a pressure storage portion whose volume is changeable.