Diaphragm Accumulator Deformation Control at High Compression Ratios
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Solution Overview
Problem
Conventional diaphragm accumulators experience overstress and potential breakage due to increased operation compression ratios, leading to reduced durability.
Innovation Solution
Incorporation of a stress relaxing member within the accumulator housing to regulate the deformed attitude of the diaphragm, reducing internal stress by contacting and stopping deformation of the flexible and reversing portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the operation compression ratio of the accumulator increases, then the pressure fluctuation range increases, but the internal stress in the diaphragm increases leading to breakage
Solution Approach 1:
A stress relaxing member is introduced as an intermediary element between the diaphragm and the accumulator housing. This member regulates the deformed attitude of the diaphragm by contact during pressure fluctuations, preventing excessive stress concentration while allowing the full pressure range to be utilized. The stress relaxing member acts as a mediator that protects the diaphragm from direct overstress caused by high compression ratios.
Solution Approach 2:
The invention changes the physical state and deformation characteristics of the diaphragm system by introducing the stress relaxing member. This member modifies the deformation pathway and stress distribution parameters, allowing the diaphragm to accommodate larger pressure fluctuations without exceeding its stress limits. The parameter change enables operation at higher compression ratios while maintaining diaphragm integrity.
2Adaptability or versatility
If the flexible portion of the diaphragm is greatly displaced to accommodate high compression ratios, then the reversing portion is pressed against the diaphragm holder, but this causes overstress and potential breakage
Solution Approach 1:
The stress relaxing member serves as a protective intermediary that contacts the reversing portion of the diaphragm during large displacements. This prevents the reversing portion from being pressed against the diaphragm holder, thereby eliminating the harmful stress concentration that would otherwise occur at high compression ratios while maintaining full adaptability.
Solution Approach 2:
The stress relaxing member is positioned in advance to provide cushioning protection before the diaphragm experiences damaging stress. By being pre-positioned to contact the reversing portion during deformation, it prevents the harmful interaction between the diaphragm and diaphragm holder before overstress can occur, ensuring reliability under high compression conditions.
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 stress relaxing member effectively reduces internal stress in the diaphragm, preventing breakage and enhancing its durability even at higher operation compression ratios.
Implementation Method 1
a flexible diaphragm provided inside the accumulator housing in such a manner as to divide inside the accumulator housing... The flexible portion 43 is deformed according to a pressure fluctuation inside the accumulator housing 21
Implementation Method 2
an internal stress generated in a diaphragm even when the operation compression ratio of an accumulator increases, and thus suppress a breakage of the diaphragm... the stress relaxing member effectively reduces internal stress in the diaphragm
Data Source
AI summary
A diaphragm accumulator provided with a flexible diaphragm inside an accumulator housing has a stress relaxing member having a contact surface which the diaphragm deformed by a pressure fluctuation inside the accumulator housing contacts and regulating the deformed attitude of the diaphragm by the contact surface on the inner surface. When the diaphragm is deformed by the pressure fluctuation inside the accumulator housing, the stress relaxing member regulates the deformed attitude of the diaphragm to reduce a stress generated in the diaphragm.