Pump Top Portion Vibration Leakage Suppression
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing pump configurations experience significant leakage of vibration when the top portion is fixed to an external structure, leading to reduced fluid flow and pressure, with changes in the vibration space gap decreasing by approximately 47% on average.
Innovation Solution
The pump design includes a top portion with a projection portion that extends beyond the side wall portion, allowing the top portion to be fixed to the external structure outside the projection portion, reducing vibration leakage and maintaining the gap changes in the vibration space, with specific conditional expressions for the projection portion dimensions to optimize fluid control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the top portion is fixed to the external structure, then the pump can be securely mounted, but vibration leakage occurs and reduces fluid flow and pressure
Solution Approach 1:
The top portion is divided into multiple functional regions: a fixing portion for mounting to the external structure, a vibration space for fluid control, and a protruding portion that extends outward. This segmentation allows the fixing function to be separated from the vibration-containing function, enabling secure mounting while preventing vibration leakage to the external structure.
Solution Approach 2:
The top portion features an asymmetric design where the protruding portion extends beyond the side wall portion in a specific direction. This asymmetric configuration creates an offset between the mounting interface and the vibration space, reducing the transmission path for vibrations while maintaining mounting stability.
2Reliability
If the top portion is fixed to the external structure, then mounting stability is improved, but the gap changes in the vibration space decrease by approximately 47%
Solution Approach 1:
The top portion is segmented into a fixing portion and a vibration space portion, with the protruding portion acting as an isolator. This segmentation ensures that the fixing operations do not directly constrain the vibration space, preserving the dynamic gap changes necessary for fluid control while providing stable mounting.
Solution Approach 2:
The protruding portion serves as an intermediary element between the fixing portion and the external structure. It acts as a vibration isolator that prevents direct mechanical coupling between the mounting interface and the vibration space, thereby maintaining gap precision while enabling secure fixation.
3Reliability
If the projection portion extends beyond the side wall portion, then vibration leakage is reduced, but the pump size increases
Solution Approach 1:
The protruding portion extends only partially beyond the side wall portion, just enough to provide effective vibration isolation. This partial extension achieves the necessary vibration suppression without unnecessarily increasing the pump dimensions, optimizing the balance between performance and compactness.
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 configuration effectively suppresses vibration leakage, maintaining high pump efficiency and fluid control, with gap changes exceeding 90% in some cases compared to when not fixed, while preventing excessive pump size increase.
Implementation Method 1
the actuator vibrates in the thickness direction. The vibration is transmitted to the top portion through the side wall portion. This causes the top portion to vibrate in the thickness direction, in addition to the vibration portion, and produces a fluid flow in the vibration space
Implementation Method 2
The side wall portion has the same external shape as that of the top portion, projects from the top portion so as to cover the surrounding area of the vibration space, and elastically supports the circumferential portion in the vibration portion
Data Source
AI summary
A fluid control device includes a pump and an external structure. The pump includes an actuator, a top portion opposed to the actuator such that a gap is disposed therebetween in the thickness direction, and a side wall plate extending from the top portion in the thickness direction and supporting a vibration member. The actuator includes the plate-like vibration member and a piezoelectric element configured to cause the vibration member to vibrate in the thickness direction. The top portion includes a projection portion and a fixation portion projecting beyond the side wall plate in an outward direction perpendicular to the thickness direction. The top portion is fixed to an external structure outside the projection portion.