Hydraulic Vibration Isolator Partition for Medium-Frequency Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional vibration isolators face difficulties in attenuating and absorbing medium frequency vibrations within the range of 200 Hz to 1000 Hz.
Innovation Solution
A vibration isolator design featuring a tubular first mounting member, a second mounting member connected via an elastic body, a partition member with a liquid chamber divided into main and auxiliary liquid chambers, and a movable member with orifice passages and communication holes, where a tubular member protrudes towards the elastic body on the partition member's inner surface, allowing for effective communication between chambers to manage medium frequency vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional vibration isolator structure is used, then low frequency vibrations (less than 200 Hz) can be attenuated, but medium frequency vibrations (200 Hz to 1000 Hz) cannot be effectively attenuated
Solution Approach 1:
The partition member is divided into multiple sections along the axial direction, with each section containing communication holes of different sizes. This segmentation allows different frequency vibrations to be directed through different communication holes, enabling the device to handle both low frequency and medium frequency vibrations effectively
Solution Approach 2:
Different communication holes are positioned at different locations on the partition member with different hole sizes. The first communication holes (larger) handle low frequency vibrations while the second communication holes (smaller) handle medium frequency vibrations, creating local quality variations that address different frequency ranges
2Ease of manufacture
If the partition member has a simple structure with single communication holes, then manufacturing is easy, but medium frequency vibration attenuation is insufficient
Solution Approach 1:
The partition member incorporates multiple communication holes segmented by position and size. This segmentation enables the structure to attenuate medium frequency vibrations while maintaining manufacturing simplicity, as each hole can be formed using standard drilling processes
Solution Approach 2:
The communication holes are designed with different parameters (sizes, positions, quantities) to target different frequency ranges. By adjusting these parameters, the partition member can effectively attenuate medium frequency vibrations without requiring complex manufacturing processes
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
This configuration enables the attenuation and absorption of medium frequency vibrations by shifting the deformation node and controlling hydraulic pressure, thereby reducing the apparent rigidity of the elastic body and effectively managing medium frequency vibrations.
Implementation Method 1
the liquid inside the liquid chamber is flowed through the orifice passage, thereby the shake vibration is attenuated and absorbed
Implementation Method 2
the liquid inside the liquid chamber is flowed through the first communication holes and the second communication hole, thereby the idle vibration is attenuated and absorbed
Implementation Method 3
an elastic body elastically connecting the first and second mounting members to each other
Implementation Method 4
the movable member is deformed or displaced inside the accommodation chamber and the liquid inside the liquid chamber is flowed through the first communication holes and the second communication hole, thereby the idle vibration is attenuated and absorbed
Data Source
Figure 1
Figure 2
Figure 3
AI summary
In a vibration isolator of the present invention, an orifice passage (24) configured to allow a main liquid chamber (14) and an auxiliary liquid chamber (15) to communicate with each other, a plurality of first communication holes (42a) configured to allow the main liquid chamber and an accommodation chamber (42) to communicate with each other, and a second communication hole (42b) configured to allow the auxiliary liquid chamber and the accommodation chamber to communicate with each other are formed in a partition member (16), a tubular member (21) that protrudes in an axial direction toward an elastic body is formed on a first wall surface (16b) of the partition member in which the first communication holes are opened and which constitutes part of an inner surface of the main liquid chamber, and the plurality of first communication holes are opened in both of an inner portion (16f) of the first wall surface positioned inside the tubular member and an outer portion (16g) of the first wall surface positioned outside the tubular member.