Elastic Mounting Layout for High-Frequency Vibration Isolation
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Solution Overview
Problem
Existing vibration isolation methods using rubber are limited by dynamic hardening at high frequencies, leading to incomplete noise isolation and potential mechanical damage to sensitive actuators like piezo elements, which are costly and prone to damage from transverse and tensile forces.
Innovation Solution
An elastic mounting system that partially positions an electrostrictive or magnetostrictive actuator outside the primary force flow between connection elements, allowing it to exert only compressive forces on a rubber-elastic spring element, thereby exciting counter-vibrations and enhancing isolation while protecting the actuator from damaging forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber-elastic spring elements are used for vibration isolation, then low-frequency vibrations are effectively damped, but high-frequency vibrations are poorly isolated due to dynamic hardening
Solution Approach 1:
The patent combines a rubber-elastic spring element for low-frequency vibration damping with an electrostrictive or magnetostrictive actuator for high-frequency vibration isolation. The actuator is integrated into the mounting structure to work in conjunction with the rubber element, creating a hybrid system that covers both low and high frequency ranges effectively.
Solution Approach 2:
The system transitions from a purely passive rubber-elastic mounting to an active system where the electrostrictive or magnetostrictive actuator dynamically adjusts its properties based on the vibration frequency. This allows the mounting to adapt its characteristics to effectively isolate both low and high-frequency vibrations.
2Reliability
If electrostrictive or magnetostrictive actuators are positioned in the force flow to counteract vibrations, then high-frequency vibration isolation is improved, but the actuators are exposed to damaging transverse and tensile forces
Solution Approach 1:
The patent positions the electrostrictive or magnetostrictive actuator in a specific location within the mounting structure where it experiences only compressive forces from the rubber-elastic spring element, while avoiding exposure to damaging transverse and tensile forces. This selective positioning protects the actuator while maintaining its vibration isolation function.
Solution Approach 2:
The rubber-elastic spring element serves as an intermediary between the vibration source and the actuator, transmitting only compressive forces to the actuator while filtering out damaging transverse and tensile forces. This mediator protects the actuator from mechanical damage while allowing it to perform its vibration counteraction function.
3Speed
If piezoelectric elements are used as actuators, then high operating speed and compact size are achieved, but the system becomes expensive and complex due to control electronics
Solution Approach 1:
The patent employs piezoelectric elements as disposable or replaceable actuators that can be directly integrated into the mounting structure without requiring complex control electronics. The simplicity of the implementation reduces overall system complexity and cost, even though piezoelectric elements themselves have limited lifespan under certain conditions.
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 improves vibration damping and isolation efficiency while extending the lifespan of the actuator by preventing exposure to tensile and bending moments, reducing noise transmission, and maintaining cost-effectiveness.
Implementation Method 1
An electrostrictive actuator is defined as an actuator that incorporates a dielectric medium which can be deformed depending on an applied electric field
Implementation Method 2
A magnetostrictive actuator is defined as an actuator that incorporates a magnetic, preferably ferromagnetic, medium which can be deformed depending on an applied magnetic field
Implementation Method 3
The elastic mounting comprises at least one rubber-elastic spring element. A spring element is generally understood to be a technical component capable of elastic deformation
Implementation Method 4
The electrostrictive or magnetostrictive actuator is designed to induce vibrations in the rubber-elastic spring element
Data Source
Figure 1~3
AI summary
The present invention relates to an elastic mounting (3), preferably a motor mount (3), which is configured to be arranged to transmit vibrations between a first connecting element (1) and a second connecting element (2) of a vibrating device, with at least one rubber-elastic spring element (32), wherein an electrostrictive or magnetostrictive actuator (33) is configured to act on the rubber-elastic spring element (32) in a vibration-exciting manner, and wherein the rubber-elastic spring element (32) is configured to be arranged in the force path between the first connecting element (1) and the second connecting element (2). The elastic mounting (3) is characterized in that the electrostrictive or magnetostrictive actuator (33) is configured to be arranged only partially in the force path between the first connecting element (1) and the second connecting element (2).