Elastic Holding Member for Stacked Diaphragm Dampers
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Solution Overview
Problem
Existing diaphragm damper devices for high-pressure fuel pumps are complex and cumbersome to manufacture, requiring simultaneous gas drawing and welding of multiple diaphragm dampers to effectively reduce fluid pressure pulsation.
Innovation Solution
A holding member with a band and hooks is used to elastically hold and integrate stacked diaphragm dampers, simplifying the manufacturing process by allowing separate damper production and easy assembly, while the band's design with ridge-shaped bent portions and narrow sections facilitates tension and easy coupling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple diaphragm dampers are arranged and welded together to increase pulsation reduction effect, then the fluid pressure pulsation reduction effect is improved, but the manufacturing process becomes more complex and time-consuming
Solution Approach 1:
The invention divides the diaphragm damper into a modular structure consisting of a cylindrical body, end caps, and a diaphragm assembly that can be manufactured separately and then assembled. This segmentation allows each component to be produced independently using standard manufacturing processes, avoiding the complexity of welding multiple dampers together while still achieving the desired pulsation reduction effect through the modular configuration.
Solution Approach 2:
The invention introduces an intermediary assembly structure that connects the diaphragm, end caps, and cylindrical body without requiring welding. The assembly uses mechanical fastening methods such as bolts or clips that allow for easy assembly and disassembly, serving as a mediator between the various components and eliminating the need for complex welding operations while maintaining structural integrity.
2Productivity
If multiple diaphragm dampers are simultaneously held and welded in a pressure container, then the coupling efficiency is improved, but the manufacturing device becomes more complicated and larger
Solution Approach 1:
The invention segments the manufacturing process into separate steps: first manufacturing the cylindrical body and end caps independently, then assembling the diaphragm assembly, and finally combining all components. This segmentation eliminates the need for complex simultaneous holding and welding operations, allowing each step to be performed with simple, standard manufacturing equipment while maintaining high coupling efficiency through the modular design.
Solution Approach 2:
The invention applies preliminary action by pre-assembling the diaphragm assembly with the end caps and cylindrical body using simple mechanical connections before final integration. This preliminary assembly can be done with basic equipment, and the pre-assembled modules can then be quickly coupled together, achieving high productivity without requiring complex simultaneous manufacturing operations.
3Strength
If diaphragm dampers are welded integrally to increase coupling efficiency, then the structural integrity is improved, but the manufacturing time and complexity increase
Solution Approach 1:
The invention uses an intermediary mechanical fastening system (such as bolts, clips, or interlocking features) that connects the end caps to the cylindrical body without welding. This intermediary connection method provides sufficient structural integrity for the diaphragm damper application while being much easier to manufacture and assemble than welded joints, allowing for rapid assembly with standard tools and techniques.
Solution Approach 2:
The invention employs simple, inexpensive mechanical fastening components that can be easily replaced or adjusted if needed. These fasteners provide adequate structural integrity for the application and are far easier and cheaper to manufacture and install than welded connections, significantly improving ease of manufacture while maintaining the necessary structural strength.
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 approach simplifies the manufacturing process and enhances the diaphragm damper device's ability to reduce fluid pressure pulsation effectively, with the hooks ensuring secure holding and the band's design allowing for efficient gas enclosure and welding.
Implementation Method 1
The holding member is formed from an elastic member. The holding member includes a band that can be elastically tightened to circumferential walls of two adjacent ones of the diaphragm dampers
Implementation Method 2
Each of the diaphragm dampers includes a pair of diaphragms and a high-pressure chamber defined by the pair of diaphragms. High-pressure gas is enclosed in the high-pressure chamber.
Data Source
Figure 1
Figure 2A~2C
Figure 3A~3B
AI summary
A holding member for a diaphragm damper device including a plurality of diaphragm dampers is formed from an elastic member. The holding member includes a band that can be elastically tightened to circumferential walls of two adjacent ones of the diaphragm dampers and hooks arranged on two sides of the band. The hooks elastically hold each of the diaphragm dampers that are stacked.