Fluid Vibration Isolator With Self-Regulating Orifice
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vibration isolators for vehicles, particularly those with fluid-filled structures, require costly components like electric actuators and solenoid valves to adjust orifices based on vehicle conditions, increasing manufacturing costs without effectively reducing vibration transmission.
Innovation Solution
A vibration isolator design featuring a first and second mounting member, an elastic element, a main fluid chamber, a fluid sub-chamber, an orifice, an opening and closing member, and a check valve with a valve body made of elastic material, where the valve body is preloaded to control fluid flow and absorb vibrations without the need for external actuators or solenoid valves.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electric actuators and solenoid valves are used to adjust orifices based on vehicle conditions, then vibration isolating performance can be improved, but manufacturing cost increases significantly
Solution Approach 1:
The opening and closing member automatically adjusts the orifice based on fluid pressure changes without requiring external actuators or control systems. The elastic member provides self-biasing, and the check valve enables automatic one-way fluid flow control, creating a self-regulating vibration isolation system that eliminates costly electronic components while maintaining isolating performance
Solution Approach 2:
The patent replaces electric actuators and solenoid valves with a purely mechanical system consisting of an opening and closing member biased by an elastic member. The mechanical system responds to fluid pressure changes directly, substituting electronic control with mechanical feedback that achieves the same orifice adjustment function without requiring electricity or complex control circuits
Solution Approach 3:
The opening and closing member acts as an intermediary between the fluid pressure changes and the orifice, translating pressure variations into mechanical displacement that automatically adjusts the flow area. This intermediary mechanism eliminates the need for direct electronic actuation while maintaining responsive control of fluid flow for vibration isolation
2Object-affected harmful factors
If electric actuators and solenoid valves are used to control orifices, then vibration transmission can be reduced, but device complexity increases
Solution Approach 1:
The system uses the fluid pressure changes themselves to drive the opening and closing member, creating a self-service control mechanism that requires no external control system. The elastic member provides automatic biasing, and the check valve enables automatic one-way flow control, eliminating complex electronic control circuits while effectively reducing vibration transmission through passive mechanical response
Solution Approach 2:
The patent extracts the control function from the expensive electric actuator and solenoid valve system and implements it through a simple mechanical opening and closing member. By taking out the essential control function (orifice adjustment) and implementing it through basic mechanical components, the system reduces device complexity while maintaining vibration isolation effectiveness
3Adaptability or versatility
If multiple orifices are provided for different vibration frequencies, then adaptability improves, but the need for actuators and controllers increases cost
Solution Approach 1:
The opening and closing member dynamically adjusts the orifice size in response to real-time fluid pressure changes caused by vibration inputs. This dynamic adjustment mechanism provides adaptability to different vibration frequencies and amplitudes without requiring multiple fixed orifices or electronic control systems, achieving versatility through continuous mechanical response to changing conditions
Solution Approach 2:
The system changes the flow parameters (orifice area, flow rate) through mechanical displacement of the opening and closing member driven by fluid pressure variations. This parameter change mechanism provides adaptability to different vibration conditions by automatically adjusting flow characteristics in response to pressure changes, eliminating the need for multiple discrete orifices or electronic parameter control
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 solution effectively reduces vibration transmission over a wide range by utilizing elastic deformation and fluid dynamics, maintaining vibration isolating performance while significantly lowering manufacturing costs by eliminating the need for costly control systems.
Implementation Method 1
an elastic element which is disposed between the first and second mounting members, and is capable of being elastically deformed
Implementation Method 2
a main fluid chamber which has the elastic element as a portion of a partition wall and is filled with a fluid, and whose internal volume is changed with deformation of the elastic element; a fluid sub-chamber configured such that at least a portion of the partition wall is deformably formed, and which is filled with a fluid; an orifice which communicates between the main fluid chamber and the fluid sub-chamber
Implementation Method 3
a check valve which is disposed between the main fluid chamber and the opening and closing member, and allows the fluid to flow from the main fluid chamber only toward the opening and closing member side
Implementation Method 4
an elastic member which biases the opening and closing member toward the check valve
Data Source
AI summary
A vibration isolator which is capable of stably opening and closing an orifice is provided at low manufacturing cost. A plunger for opening and closing an idle orifice is disposed in a manner that is slidably engaged with the inner wall surface of an orifice-forming member. A shaft portion extending downward is formed in the central portion of the plunger. A convex portion which is formed with a through-hole in which the shaft portion is slidably is provided on the bottom of the orifice-forming member so as to provide a bearing portion. The shaft portion of the plunger and the bearing portion of the orifice-forming member constitute a guide member for guiding the reciprocating motion of this plunger.