Solenoid Pump Movable Member Segmentation for Leakage Control
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Solution Overview
Problem
Existing solenoid pumps face issues with fluid contamination, unstable fluid flow, and leakage due to the movable member's opening and closing actions, leading to inconsistent liquid delivery and increased maintenance needs.
Innovation Solution
A solenoid pump design with a movable member that precisely controls the communication between the pump chamber and outlet side passage, using a diaphragm with a support member and a flat abutment to prevent fluid exposure and leakage, and a tapered outlet passage for stable fluid flow, along with a check valve to manage pressure forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the movable member blocks the inlet side passage, then fluid intake is controlled, but the pump chamber remains open to the outlet side passage causing fluid contamination and moisture removal
Solution Approach 1:
The pump chamber communication is segmented into two independent pathways: inlet side passage control and outlet side passage control. The movable member is divided into a main body that blocks the inlet passage and a protruding portion that separately controls the outlet passage, allowing independent sealing of each pathway during operation.
Solution Approach 2:
The protruding portion of the movable member acts as an intermediary element that bridges the inlet passage blocking function and the outlet passage sealing function. This intermediate structure enables coordinated control of both passages without requiring separate actuation mechanisms.
2Productivity
If the pump chamber is open to the outlet side passage during fluid discharge, then fluid can flow out, but large volume retention causes unstable fluid flow and timing variations
Solution Approach 1:
The outlet passage opening and closing is dynamically controlled by the displacement of the movable member's protruding portion. During the discharge phase, the protruding portion retracts to open the outlet passage for high flow rate, and during the blocking phase, it extends to seal the outlet passage, creating a dynamic sealing mechanism that adapts to operational phases.
3Ease of operation
If the movable member repeatedly opens and closes the fluid passage, then fluid flow is controlled, but the membrane portion becomes warped over time causing leakage
Solution Approach 1:
The sealing function is segmented between the main body of the movable member that seals the inlet passage and the protruding portion that seals the outlet passage. This segmentation distributes the sealing burden and reduces stress concentration on any single membrane portion, thereby reducing warpage and leakage over time.
4Productivity
If the outlet side passage has large volume, then fluid can be discharged, but fluid remains stored longer causing contamination and solidification
Solution Approach 1:
The outlet passage configuration is made dynamic through the movable member's protruding portion. The passage volume is dynamically adjusted by opening or closing the outlet passage at different operational phases, reducing the effective residence time of fluid in the outlet passage while maintaining adequate discharge capacity when needed.
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 ensures precise control of fluid flow, prevents fluid deterioration, stabilizes the amount of fluid discharged, and reduces maintenance efforts by preventing leakage and solidification, while allowing for easy assembly and miniaturization.
Implementation Method 1
a movable member, which is displaced based on an excitation state of a solenoid section
Data Source
AI summary
A solenoid pump is equipped with a housing formed therein with a fluid passage through which a fluid flows from an inlet port to an outlet port, and a movable member, which is displaced based on an excitation state of a solenoid section, for thereby opening and closing the fluid passage. The fluid passage includes an inlet side passage that communicates with the inlet port, an outlet side passage that communicates with the outlet port, and a pump chamber made up of a space in communication with the inlet side passage and the outlet side passage, and surrounded by the housing and an end portion of the movable member. Accompanying displacement thereof, the movable member opens and closes communication between the pump chamber and the outlet side passage.