Energy Attenuation Device with Monolithic Flexible Hose
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Hydraulic systems experience noise and vibration due to pressure pulsations generated by pumps, particularly in power steering systems of vehicles, which existing energy attenuation devices fail to adequately address without requiring a defined annular space between the tube and hose.
Innovation Solution
A monolithic, multi-part conduit section with a central portion and intermediate portions of varying diameters, where the hose section rests flush against the conduit in a non-pressurized state and expands to attenuate noise when fluid under pressure flows, eliminating the need for an annular space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a tube is disposed in a hose with a defined annular space between them, then energy attenuation can be achieved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent merges the tube and hose into a single integrated component where the hose is formed directly over the tube with no annular space between them. This integration eliminates the complexity of maintaining a defined gap while preserving the energy attenuation function through the hose's expansion capabilities.
Solution Approach 2:
The hose is designed as a flexible structure that can expand and contract in response to pressure changes. This flexibility allows the hose to dynamically create attenuation space during operation without requiring a pre-defined annular gap, simplifying the overall device structure.
2Loss of energy
If a tube is disposed in a hose with a defined annular space, then energy attenuation is possible, but the manufacturing precision requirements increase
Solution Approach 1:
By combining the tube and hose into an integrated assembly where the hose is formed directly over the tube, the patent eliminates the need to manufacture and assemble two separate components with precise spacing requirements, thereby reducing manufacturing precision demands.
Solution Approach 2:
The hose is designed to dynamically expand and contract based on pressure conditions, creating the attenuation space only when needed during operation. This dynamic behavior replaces the static annular space requirement, significantly easing manufacturing precision constraints.
3Object-affected harmful factors
If the hose section expands to attenuate noise, then noise reduction is achieved, but the structure becomes more complex
Solution Approach 1:
The hose structure is designed to automatically expand and contract in response to pressure changes without requiring external control mechanisms. This self-service capability achieves noise attenuation through the hose's inherent elasticity, avoiding additional complex components.
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
Effectively reduces noise and vibration by allowing the hose section to expand and create a space for fluid to escape, thereby attenuating pressure ripples without leaking when the system is depressurized, enhancing the performance of hydraulic systems.
Implementation Method 1
When fluid under pressure flows through the system, fluid exits the aperture or apertures causing the hose section to expand to thereby provide noise attenuation
Implementation Method 2
the hose section rests against, i.e. touches, those parts of the intermediate portions about which it is disposed
Data Source
AI summary
An energy attenuation device for a system adapted to convey pressurized fluid through tubing of the system, comprising a multi-part conduit section for receiving fluid from, and returning fluid to, the tubing, the conduit section including a central portion, two intermediate portions respectively disposed at opposite ends of the central portion, and two end portions respectively disposed at an end of an intermediate portion remote from the central portion. The central portion has at least one aperture in a peripheral surface and a first diameter that is less than a second diameter of the intermediate portions. The end portions have a third diameter that is less than the second diameter. The end portions are received at least partially in the tubing sections. A hose section is disposed about the central portion and at least part of each intermediate portion.