Damper Seal Buckling Prevention via Deformation Control
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Solution Overview
Problem
Existing dampers experience buckling issues when subjected to high loads, leading to reduced seal properties and frictional forces, resulting in uneven braking forces and ventilation control problems.
Innovation Solution
Incorporating a deformation control portion that suppresses the inward deformation of the seal member during braking, ensuring a uniform braking force is maintained throughout the movement by contacting the seal member at its center in the moving direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the outer frame shape in a cross section of the housing is made flat to reduce size, then the housing compactness is improved, but the seal member deformation control deteriorates causing buckling
Solution Approach 1:
The deformation control portion is designed to preemptively counteract the inward deformation tendency of the seal member before buckling can occur. By providing a structural element that opposes the deformation force in advance, the system prevents the instability condition from developing, resolving the contradiction between compact housing design and seal stability.
Solution Approach 2:
The deformation control portion is specifically positioned at the critical location where the seal member contacts the housing inner wall. This localized structural feature provides enhanced support precisely where needed, allowing the housing to maintain a compact flat cross-section while ensuring seal stability at the specific problematic area.
2Reliability
If the seal member extends forward to improve sealing, then the seal property is improved, but the buckling resistance deteriorates under high load
Solution Approach 1:
The seal member structure is segmented into functional portions: a forward-extending sealing portion that contacts the housing inner wall to provide sealing, and a deformation control portion that provides structural support. This segmentation allows the sealing function and structural strength function to be independently optimized, resolving the contradiction between seal property and buckling resistance.
Solution Approach 2:
The deformation control portion acts as an intermediary structural element between the seal member and the housing. It mediates the mechanical stresses by providing support to the seal member's inward-facing surface, preventing buckling while allowing the seal member to extend forward for sealing purposes.
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 deformation control portion effectively prevents buckling, maintaining consistent braking force and seal integrity, even under high loads, and prevents rapid reduction in frictional force, ensuring stable braking performance.
Implementation Method 1
a portion contacting the inner wall of the housing in the seal member deforms toward an outside of the housing
Implementation Method 2
a slider contacting the inner wall of the housing with a predetermined frictional force
Data Source
AI summary
A damper includes a piston provided with a rod, and a housing storing the piston, and generates a braking force by an operation of the piston. The piston includes a seal member relative to an inner wall of the housing; and a slider contacting the inner wall of the housing with a predetermined frictional force. When the braking force is generated, the slider presses against the seal member, and a portion contacting the inner wall of the housing in the seal member deforms toward an outside of the housing. At an inner side of the portion contacting the inner wall of the housing in the seal member, a deformation control portion is provided, which suppresses the seal member from deforming toward an inside of the housing.