Two-Piece Fluid Damper Assembly for Pulsation Damping
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fluid dampers in systems like fuel injection and pressurized lubrication systems face challenges in effectively damping fluid pressure pulsations, leading to inefficiencies and potential damage from heat exposure and misassembly errors.
Innovation Solution
A fluid damper design featuring a two-piece body with a damping device suspended inside, constrained by a peripheral edge, dividing the fluid chamber into sub-chambers and utilizing a hermetic seal and segmented fingers to pinch the damping device, ensuring a robust and precise constraining force without additional retainers, while minimizing heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional single-piece body design is used, then manufacturing is simpler, but the damping device cannot be effectively constrained and heat transfer is excessive
Solution Approach 1:
The body is divided into two separate covers (first cover and second cover) that are joined together. This segmentation allows the damping device to be constrained between the covers, providing effective constraint while maintaining a relatively simple overall structure. The first cover includes a first wall portion and the second cover includes a second wall portion that receives the first wall portion, creating a secure assembly.
Solution Approach 2:
The first wall portion of the first cover is received within the second wall portion of the second cover, creating a nested structure. This nesting arrangement allows the damping device to be positioned and constrained effectively between the two covers, providing reliable constraint without requiring complex external structures.
2Reliability
If additional retainers are used to constrain the damping device, then constraint is improved, but device complexity increases
Solution Approach 1:
The constraint function is merged into the covers themselves. The second cover's second wall portion is designed to receive and constrain the damping device periphery directly, eliminating the need for separate retainers. The hermetic seal between the first and second covers also contributes to the constraint mechanism, providing multi-functional integration.
Solution Approach 2:
The covers serve multiple functions: they form the fluid chamber, provide hermetic sealing, and constrain the damping device. The second wall portion of the second cover simultaneously provides structural containment and damping device constraint, reducing the need for additional specialized components.
3Temperature
If the body is formed as a single piece, then manufacturing precision is easier to achieve, but heat transfer to the damping device is excessive
Solution Approach 1:
The body is segmented into two separate covers that are joined together. This segmentation creates thermal isolation between the fluid chamber and the external environment, protecting the damping device from excessive heat transfer. The hermetic seal between the covers maintains this thermal protection while allowing precise assembly through the receiving structure.
4Reliability
If a hermetic seal is formed between covers, then sealing is improved, but assembly complexity increases
Solution Approach 1:
The first wall portion is received within the second wall portion, creating a nested assembly structure. This design provides a natural location for forming a hermetic seal (such as through welding or other sealing methods) while maintaining ease of assembly. The nested structure guides the assembly process and ensures proper alignment for sealing.
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 design effectively dampens fluid pressure pulsations, reduces the risk of misassembly, and protects the damping device from heat damage, enhancing the robustness and reliability of the fluid damper in various applications.
Implementation Method 1
a hermetic seal is formed between the first and second wall portions of the first and second covers
Implementation Method 2
The outer wall of the second cover terminates in a plurality of inward-extending fingers that are elastically deflected to exert a constraining force that pinches the peripheral edge of the damping device against the first cover
Implementation Method 3
A damping device is suspended inside the fluid chamber and configured to damp fluid pressure pulsations
Data Source
AI summary
A fluid damper includes a body defining a fluid chamber and a first opening. The body is formed by a first cover and a second cover joined along an axial direction. A damping device is suspended inside the fluid chamber to damp pressure pulsations. The damping device is constrained by a peripheral edge. The damping device divides the fluid chamber into first and second sub-chambers. The first cover has a first wall portion into which a second wall portion of the second cover is received. A hermetic seal is formed between the first and second wall portions. The second cover has a terminal edge lying within the first wall portion of the first cover, the terminal edge being segmented into a plurality of fingers that cooperate with a ledge surface of the first cover to pinch the peripheral edge of the damping device.