Compact Electromagnetic Pump Stepped Piston Radial Valve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electromagnetic pumps with embedded check valves require additional space within the piston, leading to increased axial length and larger pump sizes.
Innovation Solution
The design incorporates a stepped inner and outer diameter configuration for the cylinder and piston, allowing for a greater volume change in one fluid chamber compared to the other, with an embedded second on-off valve and a communication hole to facilitate hydraulic fluid flow, enabling the valve to be embedded even with a shortened piston length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a check valve is embedded in the piston, then the valve body structure is simplified and no separate check valve in valve body is needed, but the axial length of the piston increases and the overall size of the pump increases
Solution Approach 1:
The patent applies dimensionality change by transitioning from a conventional linear embedding of the check valve along the piston axis to a radial arrangement where the check valve is positioned in a hole through the piston body. This allows the valve to be embedded without significantly increasing axial length, as the valve structure is arranged in a different spatial dimension (radially through the piston rather than extending axially).
Solution Approach 2:
The check valve is nested within a hole formed through the piston body, with the valve body portion embedded inside the piston while maintaining a compact configuration. The nested arrangement allows the valve to be integrated into the piston structure without requiring additional external space that would increase the overall pump size.
2Length of moving object
If the piston axial length is shortened to reduce pump size, then the overall pump dimensions are reduced, but there is insufficient space to embed a check valve
Solution Approach 1:
The patent resolves this contradiction by arranging the check valve in a radial direction through the piston body rather than extending it axially. The hole for the check valve is formed through the piston body in a direction perpendicular to the main piston stroke, allowing valve embedding without increasing the axial length of the piston.
Solution Approach 2:
The piston body is segmented by forming a separate hole through it to accommodate the check valve. This segmentation allows the valve to be positioned independently from the main piston structure, enabling compact axial dimensions while still providing adequate space for the valve embedding.
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 allows for a more compact electromagnetic pump size while maintaining efficient hydraulic fluid management and processing simplicity.
Implementation Method 1
an electromagnetic portion that forwardly moves the piston in a manner that decreases the volume of the first fluid chamber and increases the volume of the second fluid chamber
Implementation Method 2
a biasing member that backwardly moves the piston in a manner that increases the volume of the first fluid chamber and decreases the volume of the second fluid chamber
Implementation Method 3
a first on-off valve that allows a hydraulic fluid to move from a supply source to the first fluid chamber and prohibits reverse movement of the hydraulic fluid
Implementation Method 4
a second on-off valve that is embedded in the piston and interposed between the first fluid chamber and the second fluid chamber, and allows the hydraulic fluid to move from the first fluid chamber to the second fluid chamber and prohibits reverse movement of the hydraulic fluid
Data Source
AI summary
An electromagnetic pump includes a cylinder with a stepped inner diameter with first and second inner diameters. A piston inside the cylinder, with a stepped outer diameter including first and second outer diameters slidable on the respective inner diameters, defines first and second fluid chambers. Reciprocal movement of the piston produces a greater change in volume in the first chamber than the second chamber. An electromagnetic portion moves the piston to decrease the volume of the first chamber and increase the volume of the second chamber. A biasing member moves the piston to increase the volume of the first chamber and decrease the volume of the second chamber. A first valve allows fluid to flow to the first chamber and prohibits reverse flow. A second valve embedded in the piston allows fluid to flow from the first chamber to the second chamber and prohibits reverse flow.