Pressure Cushioning Device Radial Extending Section
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Pressure buffer devices experience variations in damping force due to disturbances and stagnation of fluid flow, leading to unstable valve operation.
Innovation Solution
A pressure buffer device with a cylinder and a piston rod, featuring a damping force generating section that includes a channel forming section, a valve for opening-closing the channel, an annular projecting section, and an extending section that projects radially from the channel forming section, with the extending section's height configured to minimize fluid disturbance and stagnation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the extending section is positioned close to the channel opening to compact the structure, then device complexity is reduced, but fluid disturbance and stagnation occur causing damping force variation
Solution Approach 1:
The extending section is positioned in the radial direction rather than extending axially toward the channel opening. This dimensional change allows the extending section to be compact in the axial direction while maintaining sufficient radial distance from the channel opening to prevent fluid disturbance and stagnation, thus resolving the contradiction between structural compactness and damping force stability.
2Reliability
If the extending section projects far radially to prevent fluid stagnation, then damping force stability is improved, but device complexity increases
Solution Approach 1:
The extending section achieves fluid flow control by projecting in the radial direction rather than axially. This allows the structure to maintain compact axial dimensions while the radial extension effectively prevents fluid stagnation at the channel opening, thus improving damping force stability without significantly increasing overall device complexity.
3Ease of manufacture
If the valve is positioned close to the channel opening for compact design, then ease of manufacture is improved, but valve operation becomes unstable due to fluid disturbance
Solution Approach 1:
The extending section acts as an intermediary structure between the channel opening and the valve. It radially extends to guide fluid flow away from the valve region, preventing direct fluid disturbance and stagnation at the valve location. This allows the valve to be positioned closer to the channel opening for easier manufacture while maintaining stable valve operation through the flow-guiding function of the extending section.
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 configuration reduces variation in damping force generation, stabilizing valve operation and ensuring consistent performance by preventing fluid disturbance and stagnation.
Implementation Method 1
a channel forming section that forms a channel through which the fluid flows in accordance with the relative movement of the rod against the cylinder
Implementation Method 2
a valve that performs opening-closing of the channel of the channel forming section
Implementation Method 3
a damping force generating section that generates damping force for relative movement of the rod against the cylinder
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
A piston section includes a valve seat 30 that forms a first compression-side oil path 32 through which oil flows in accordance with relative movement of a piston rod 21 against a first cylinder, a first compression-side valve section 40 that performs opening-closing of the first compression-side oil path 32 of the valve seat 30, an inner annular section 34 annularly formed as projecting in the axial direction of the valve seat 30 from the valve seat 30 toward the first compression-side valve 40, and an extending section 35 that extends in the radial direction of the valve seat 30 from an outer side of the inner annular section 34 to a position at the inner side from a second oil path opening 322 of the first compression-side oil path 32 and projects in the axial direction from the valve seat 30 toward the first compression-side valve section 40.