Damping Fluid Mount With Gradient Viscosity For Broadband Vibration Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Off-highway vehicle cabs experience significant vibrations and movements that lead to equipment fatigue, operator discomfort, and reduced operational efficiency, with existing damping solutions either lacking durability or being cost-ineffective.
Innovation Solution
The development of a damping fluid mount system featuring a bonded core with an elastomer section, an annular damping plate, and a crimped cup design that incorporates viscous fluid for broadband damping, providing superior sealing, increased durability, and high-frequency isolation, along with a modular design for adaptable static load configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If narrowband damping is used to provide damping at specific vibrational frequencies, then damping performance at those frequencies is improved, but the damping effect is limited to a narrow vibrational band and cannot address broadband vibrations
Solution Approach 1:
The patent changes the physical parameters of the damping fluid by using a gradient viscosity structure, where the fluid has different viscosities at different radial positions. This allows the same fluid to provide effective damping across a broad spectrum of vibrational frequencies, resolving the contradiction between targeted damping performance and broadband adaptability
Solution Approach 2:
The damping fluid is designed with non-uniform properties, where different regions of the fluid have different viscosities tailored to damp specific frequency ranges. This local differentiation of fluid properties enables broadband damping coverage while maintaining effective damping at each frequency band
2Reliability
If annular damping with high viscosity fluid is used to achieve broadband damping, then damping across a wide range of frequencies is improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Instead of creating complex multi-chamber structures or layered fluid arrangements, the patent achieves broadband damping by changing the viscosity parameter of the fluid in a gradient manner. This simplifies the device structure while maintaining broadband damping effectiveness
Solution Approach 2:
The damping fluid acts as a composite material with varying viscosity properties throughout its volume. This composite approach allows a single fluid system to provide broadband damping without requiring multiple separate damping elements or complex structural configurations
3Ease of manufacture
If traditional fluid mount designs are used, then basic damping function is provided, but sealing performance deteriorates leading to fluid leakage and reduced durability
Solution Approach 1:
The patent uses an elastomeric seal that flexes to maintain contact with the mounting surface, creating an effective seal that prevents fluid leakage. The flexibility of the elastomeric material allows it to accommodate surface irregularities and maintain sealing under varying operating conditions
Solution Approach 2:
The elastomeric seal acts as an intermediary element between the fluid chamber and the external environment. It provides a reliable sealing interface that prevents fluid escape while allowing the mount to perform its damping function, thereby improving durability without compromising ease of manufacture
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 gross vehicle cab vibrations, enhances fatigue life, and improves operator comfort by providing superior sealing and durability while maintaining cost-effectiveness, allowing for a range of load ratings through modulus adjustments in the elastomer section.
Implementation Method 1
broadband damping provides damping across a large spectrum of vibrational frequencies. Broadband damping is usually achieved by using annular damping and a relatively high viscosity fluid
Implementation Method 2
an elastomer section that is affixed to an outer surface of the inner member
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
The present subject matter relates to improved damping fluid mount devices, systems, and methods in which a damping fluid mount (100) includes an inner member (110), an elastomer section (130) that is affixed to an outer surface of the inner member (110), an annular damping plate (140) attached to a bottom portion of the inner member (110), a cup (200) containing viscous fluid positioned about the elastomer section and the damper plate, and a collar (310) positioned about a portion of the elastomer section (130), the collar (310) having an inner diameter that is less than an outer diameter of the damper plate (140).