Shock Absorber Damping Valve With Movable Partition for Noise Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
There is a demand to suppress the occurrence of abnormal noise in shock absorbers.
Innovation Solution
A shock absorber and damping valve device are designed with a cylinder, piston, first and second passages, and damping valves. The second damping disc valve includes a third passage for constant communication and a variable chamber partitioned by a movable partition member, which overlaps the damping disc valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional damping valve structure is used, then the shock absorber provides basic damping function, but abnormal noise occurs during operation
Solution Approach 1:
The damping valve is segmented into multiple functional components: a first damping valve for resistance, a second damping disc valve with a movable partition member for noise suppression, and a third valve for pressure equalization. This segmentation allows each component to address specific issues (damping, noise, pressure balance) independently, resolving the noise problem while maintaining overall system functionality.
Solution Approach 2:
The partition member in the second damping disc valve is designed to move dynamically in response to pressure changes. This dynamic behavior allows the valve to adapt its characteristics during operation, suppressing abnormal noise through controlled movement while maintaining effective damping across varying operating conditions.
2Force
If damping force is increased to improve shock absorption, then shock absorption performance improves, but abnormal noise occurrence increases
Solution Approach 1:
The damping function is divided between multiple valves: the first damping valve provides primary damping force, while the second damping disc valve with movable partition member specifically addresses noise suppression. This segmentation allows the system to maintain high damping force while suppressing abnormal noise through the specialized second valve.
Solution Approach 2:
The movable partition member acts as an intermediary element that responds to pressure changes and modulates fluid flow. This intermediary mechanism suppresses abnormal noise by controlling pressure fluctuations and flow characteristics, allowing high damping force to be maintained without the harmful noise effects.
3Object-affected harmful factors
If a simple valve structure is used, then device complexity is low, but abnormal noise suppression capability is insufficient
Solution Approach 1:
The valve system is segmented into three distinct functional valves, with the second damping disc valve containing a movable partition member specifically designed for noise suppression. This segmentation provides targeted noise suppression capability while keeping each individual valve component relatively simple in design.
Solution Approach 2:
The second damping disc valve with movable partition member serves multiple functions: it provides damping resistance like the first valve, and simultaneously suppresses abnormal noise through its dynamic partition member. This multi-functionality achieves noise suppression without requiring entirely separate dedicated noise control mechanisms.
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 effectively suppresses the occurrence of abnormal noise while maintaining damping force performance across various piston speeds and frequencies.
Implementation Method 1
a variable chamber communicating with the fourth passage and partitioned by a partition member, which is movable according to a change in pressure of a chamber on an upstream side or a downstream side
Implementation Method 2
a first damping valve providing resistance to a flow of the working fluid from a chamber on an upstream side to a chamber on a downstream side of the first passage, a second damping disc valve providing resistance to a flow of the working fluid
Data Source
AI summary
A shock absorber has a first passage through which a working fluid flows due to movement of a piston in a cylinder in one direction, a first damping valve providing resistance to the working fluid flowing from a chamber upstream of a chamber on a downstream side of the first passage, a second passage through which the working fluid flows due to movement of the piston in the other direction, and a second damping disc valve providing resistance to the working fluid from a chamber upstream of a chamber on a downstream side of the second passage. The second damping disc valve includes a third passage which allows communication between a chamber on an upstream side and a chamber on a downstream side, and a fourth passage communicating with a chamber on an upstream side, and a variable chamber communicating with the fourth passage and partitioned by a partition member.