Self-Leveling Damper Diaphragm Ribs for Unblocked Oil Flow
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Solution Overview
Problem
Conventional self-leveling dampers for vehicles experience inefficient oil flow between high and low pressure chambers due to diaphragm expansion, leading to excessive pressure rise, durability issues, and noise, caused by reduced side flow paths in the diaphragm and holder structures.
Innovation Solution
The self-leveling damper features a diaphragm with inwardly protruding ribs on its internal surface, longer coupling portions to prevent contact with holders, and a step portion on the relief valve hole flow path to maintain unblocked flow paths, along with round surfaces on lower holder flow paths to prevent damage and leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the diaphragm expands during compression and tension of the damper, then the diaphragm can accommodate pressure changes, but the side flow path is reduced blocking oil flow between chambers
Solution Approach 1:
The diaphragm is segmented with multiple ribs protruding inward from the internal circumferential surface. These ribs divide the diaphragm wall into multiple sections, creating dedicated flow passages between them that maintain oil flow paths even when the diaphragm expands under pressure.
Solution Approach 2:
The ribs create localized flow channels within the diaphragm structure. By concentrating flow paths in specific regions between the ribs, the design ensures that oil can move between high and low pressure chambers even when the overall diaphragm expands, maintaining local flow quality while accommodating global pressure changes.
2Stress or pressure
If the relief valve opens to release excessive pressure, then the maximum pressure of the high pressure chamber is managed, but parts durability is reduced and severe noise is generated
Solution Approach 1:
The ribs are pre-formed on the diaphragm surface to maintain flow paths before pressure buildup occurs. This preliminary structural feature ensures that oil can continuously flow between chambers during normal operation, preventing excessive pressure accumulation that would trigger the relief valve and cause damage or noise.
3Device complexity
If the diaphragm and holder structures are designed conventionally, then the structure is simple, but the side flow path is reduced causing inefficient oil movement
Solution Approach 1:
The flow paths are created in the radial dimension of the diaphragm wall by forming ribs that protrude inward. This adds a dimensional feature to the diaphragm structure that creates dedicated flow channels without increasing the overall axial length or external dimensions of the damper, maintaining compactness while improving oil movement efficiency.
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 design ensures efficient oil flow between chambers, preventing excessive pressure rise, reducing noise and damage, and enhancing the durability of parts by maintaining unblocked flow paths and preventing oil leakage.
Implementation Method 1
when the pressure of a high pressure chamber rises excessively, the relief valve is opened so that the oil of the high pressure chamber is sent to a low pressure chamber
Implementation Method 2
the movement of oil from the high pressure chamber to the low pressure chamber is not efficient
Data Source
AI summary
A self-leveling damper includes a plurality of ribs formed on an internal circumferential surface of a rectilinear portion of a diaphragm to maintain flow paths between an external tube and the diaphragm, a step portion which prevents the blocking of a relief valve hole flow path by an upper holder coupling portion and is formed on a lower surface of an upper holder, wherein an upper edge portion of each of lower holder flow paths is formed as a round surface which is a curved surface so that damage to a lower holder coupling portion may be prevented.