Bellows Accumulator Sealing Structure for Uniform Adhesive Bonding
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Solution Overview
Problem
The existing accumulator designs face issues with non-uniform adhesive application due to planar surfaces of substrates, leading to uneven bonding forces and reduced lifespan, especially under repeated stress from attachment and detachment of the sealing member.
Innovation Solution
The accumulator features substrates with curved surfaces, allowing for uniform adhesive application and preventing detachment of the elastic member, along with a pressure releasing flow passage for high-temperature scenarios, ensuring extended lifespan and reliable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If planar surfaces are used for substrates, then adhesive application is simplified, but adhesive distribution becomes non-uniform leading to weak bonding
Solution Approach 1:
The substrate surface is designed with a specific curvature (concave or convex) instead of a planar surface. This curvature creates gaps between stacked substrates, allowing adhesive to flow through and distribute uniformly across the bonding interface, thereby achieving both ease of manufacture and uniform adhesive distribution.
2Ease of manufacture
If planar substrates are used, then manufacturing is easier, but bonding force becomes non-uniform reducing component life
Solution Approach 1:
By introducing curvature to the substrate surface, the invention ensures uniform bonding force distribution between the substrate and the elastic member. The curved surface creates consistent gaps that allow uniform adhesive penetration, resulting in uniform bonding strength that enhances component reliability and lifespan.
3Ease of manufacture
If adhesive is applied by brushing or spraying, then application is simple, but uniform distribution across substrates is difficult to achieve
Solution Approach 1:
The curved substrate surface passively facilitates uniform adhesive distribution during simple application methods like brushing or spraying. The curvature creates natural flow paths and gaps that guide adhesive evenly across the surface, eliminating the need for complex application equipment or procedures while achieving uniform coverage.
4Ease of manufacture
If elastic member is weakly bonded to substrate, then manufacturing is easier, but detachment occurs under repeated stress
Solution Approach 1:
The curved substrate surface enhances bonding strength by creating uniform gaps that allow complete and even adhesive distribution. This results in a bonding interface with consistent strength across the entire elastic member, preventing weak points that would lead to detachment under repeated stress, while maintaining manufacturing simplicity.
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 ensures uniform bonding forces and extended accumulator lifespan by facilitating even adhesive distribution and providing a pressure releasing mechanism to handle high temperatures effectively.
Implementation Method 1
an adhesive is applied onto the surface of the substrate so that the elastic member is strongly vulcanization bonded to the surface of the substrate
Implementation Method 2
the bellows main body is expanded and contracted so as to balance gas pressure in the gas chamber and liquid pressure in the liquid chamber
Implementation Method 3
the bellows is expanded by the gas pressure in the bellows, and the sealing member is closely attached to a sealing face of a partition wall provided in the liquid chamber
Data Source
AI summary
An accumulator a housing having a sealing face and a fluid inlet/outlet passage; a bellows fixed at least one end to the housing such that an inner space of the housing such that an inner space of the housing is hermetically partitioned by the bellows into an interior and an exterior of the bellows, the bellows including a bellows main body capable of expanding and contracting and a bellows cap including an annular seal holder, and a sealing member formed by covering a disc-shaped substrate with an elastic body that is opposed to and capable of being closely attached to the sealing face of the housing. At least a center part of a surface of the substrate opposing the sealing face is a curved surface having an arc shape in a sectional view.