Fluid Pumping Device With Elastic Annular Plug Sealing
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Solution Overview
Problem
Conventional fluid pumping devices for refilling oil tanks suffer from leakage and spillage due to inadequate sealing, particularly when the piston moves, leading to fluid waste and pollution.
Innovation Solution
A fluid pumping device featuring a barrel body with a piston mechanism that includes two annular plugs with distinct annular base and protrusion sections, which are designed to fit snugly into annular grooves, providing enhanced sealing and smooth operation by utilizing elastic materials and specific geometric configurations to ensure effective contact with the inner cavity walls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an O-ring is used for sealing, then the sealing function is provided, but the O-ring slides and deforms causing gaps and leakage
Solution Approach 1:
The patent uses an elastic annular plug instead of a traditional O-ring. The annular plug includes an elastic annular body that can flexibly deform to adapt to the inner wall of the receiving space, providing reliable sealing while allowing smooth movement during piston operation
Solution Approach 2:
The patent changes the material parameters by using an elastic material for the annular plug that has appropriate elasticity and friction coefficients. The elastic modulus and surface friction characteristics are optimized to ensure the plug maintains contact with the inner wall during movement, preventing gaps while enabling smooth operation
2Productivity
If the piston moves to push fluid, then fluid transfer is achieved, but leakage and spillage occur due to inadequate sealing
Solution Approach 1:
The elastic annular plug acts as a flexible sealing element that maintains continuous contact with the inner wall of the receiving space during piston movement. This flexible sealing mechanism prevents fluid leakage and spillage while allowing the piston to move freely for efficient fluid transfer
Solution Approach 2:
The annular plug serves as an intermediary sealing element between the piston and the receiving space wall. It mediates the interaction by providing a compliant sealing interface that accommodates movement while preventing fluid escape, thus resolving the conflict between productivity and substance loss
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 device achieves improved sealing and reduced leakage, allowing for efficient and spill-free fluid transfer, enhancing the user experience and environmental sustainability by minimizing fluid waste during refilling processes.
Implementation Method 1
Each of the first annular plug and the second annular plug has an annular base section and an annular protrusion section. The annular protrusion section has a first outer annular abutting face. The annular base section has an outer annular base face. The first outer annular abutting face traverses the outer annular base face. The first outer annular abutting face abuts against an inner wall of the cavity to block the cavity.
Data Source
AI summary
A fluid pumping device includes a barrel body and a piston mechanism. The barrel body has a cavity. The piston mechanism includes a piston member, a first annular plug, and a second annular plug. The piston member movably extends into the cavity. The piston member has two annular grooves where the first and the second annular plugs are disposed respectively. Each of the first the second annular plugs has an annular base section and an annular protrusion section. The annular protrusion section has a first outer annular abutting face. The annular base section has an outer annular base face. The first outer annular abutting face abuts against the inner wall of the cavity.