Frequency-Sensitive Damping Mechanism in a Compact Nested Valve
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Solution Overview
Problem
Existing damping force generation mechanisms are large and lack the ability to vary damping forces in response to frequency changes, limiting their design flexibility and efficiency.
Innovation Solution
A damping force generation mechanism that includes a biasing force generation member, a frequency sensitive mechanism, and a seat forming member, allowing for size reduction and variable damping forces based on frequency, with a pilot case and piston configuration that enables compact design and improved damping control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a conventional damping force generation mechanism is used, then damping force is provided, but the mechanism is large in size
Solution Approach 1:
The frequency sensitive mechanism is nested within the biasing force generation member, with the piston disposed inside the pilot case. This nested configuration allows the frequency sensitive mechanism to be integrated into the existing structure, reducing the overall volume of the damping force generation mechanism while maintaining its damping force generation capability.
Solution Approach 2:
The biasing force generation member serves multiple functions: it generates biasing force for the valve, provides structural housing for the frequency sensitive mechanism, and defines the valve closing direction. This multi-functionality reduces the need for separate components, thereby reducing the overall size of the mechanism.
2Adaptability or versatility
If damping force is kept constant, then结构简单, but the mechanism cannot adapt to varying frequencies
Solution Approach 1:
The valve is made movable relative to the seat, allowing it to dynamically adjust its position in response to frequency changes. The frequency sensitive mechanism causes the biasing force to vary with frequency, which dynamically adjusts the valve opening degree and thus the damping force, enabling adaptation to varying frequencies.
Solution Approach 2:
The frequency sensitive mechanism acts as an intermediary between the hydraulic system and the valve control system. It translates frequency variations into biasing force variations, which then modulate the valve opening degree, providing indirect but effective frequency-responsive control without direct mechanical frequency sensing.
3Volume of moving object
If the mechanism size is reduced, then space is saved, but damping force control becomes more difficult
Solution Approach 1:
The frequency sensitive mechanism enables the valve to automatically adjust its opening degree in response to frequency changes without external control input. The system self-regulates the damping force based on the inherent frequency-dependent biasing force variations, eliminating the need for complex external control systems.
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 mechanism achieves size reduction while providing adjustable damping forces, enhancing design flexibility and performance by accommodating varying frequencies, thus improving the damping force generation mechanism's efficiency and adaptability.
Implementation Method 1
a frequency sensitive mechanism that is provided between the regulation member and the first damping force generation member, is provided with a movable portion in a movable manner, and makes the biasing force variable
Implementation Method 2
a biasing force generation member that causes a first damping force generation member having a bottomed tubular shape and disposed on a side of an opening to generate a biasing force in a valve closing direction
Data Source
AI summary
A damping force generation mechanism (190) includes: a biasing force generation member (91) that causes a first damping force generation member (203) having a bottomed tubular shape and disposed on a side of an opening (145) to generate a biasing force in a valve closing direction; a regulation member (18) that is provided on a side of a bottom portion (92) of the biasing force generation member (91) and includes passages (43, 44) formed to establish communication between a one-side chamber and an other-side chamber (20); a frequency sensitive mechanism (191) that is provided between the regulation member (18) and the first damping force generation member (203), is provided with a movable portion (171) in a movable manner, and makes the biasing force variable; and a seat forming member (205) that is provided at the biasing force generation member (91) on the side of the opening (145) and includes a seat (233) formed therein for the first damping force generation member (203) to be seated.