Magnetic Coupling System for Fluid Displacement Apparatus Misalignment

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Solution Overview

Problem

Traditional fluid transfer devices using mechanical seals face issues with premature seal degradation due to misalignment of linear actuators and pistons, leading to accuracy and leakage problems during fluid transfer.

Innovation Solution

A magnetic coupling system is introduced to couple the piston to the drive shaft of a linear actuator, compensating for misalignment and incorporating a sealing fluid to prevent leakage, along with an anti-rotation device to enhance precision and durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mechanical seals are used to prevent air entry in traditional fluid transfer devices, then sealing function is provided, but premature seal degradation occurs due to misalignment of linear actuators and pistons

Engineering Contradiction:

Improveseal durabilityVSAvoidalignment precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent replaces the mechanical coupling system with a magnetic coupling system. The linear actuator drive shaft is magnetically coupled to the piston, eliminating the need for mechanical seals and mechanical alignment between the actuator and piston. This magnetic coupling inherently compensates for misalignment while maintaining the sealing function through the magnetic field connection.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If mechanical coupling is used between linear actuator and piston, then motion transmission is achieved, but misalignment causes premature seal degradation and accuracy loss

Engineering Contradiction:

Improvefluid transfer efficiencyVSAvoiddevice accuracy

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent substitutes the mechanical coupling mechanism with a magnetic coupling mechanism. The magnetic field transmission system allows for motion transmission between the linear actuator and piston while automatically compensating for misalignment, thereby maintaining device accuracy and preventing seal degradation without compromising fluid transfer efficiency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If traditional mechanical seals are used, then fluid containment is provided, but wear and leakage occur over time

Engineering Contradiction:

Improvesealing performanceVSAvoiddevice operational lifespan

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent replaces the mechanical seal system with a magnetic coupling system that provides both motion transmission and sealing functions. This eliminates wear-prone mechanical seal contacts and allows the device to maintain reliable sealing performance throughout its operational lifespan without the degradation that occurs in traditional mechanical seal systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 magnetic coupling system and sealing fluid combination ensures precise fluid transfer with reduced wear and leakage, maintaining accuracy and extending the device's operational cycles without degradation.

Implementation Method 1

A magnetic coupling system is introduced to couple the piston to the drive shaft of a linear actuator, compensating for misalignment

Methodology Applied

Scientific EffectMagnetic coupling: Magnetism

Implementation Method 2

incorporating a sealing fluid to prevent leakage

Methodology Applied

Scientific EffectFluid sealing: Lubrication

Data Source

PatentUS7690293B2Coupling system for use with fluid displacement apparatus

Publication Date: 2010.04.06 IVEK CORP

AI summary

A magnetic coupling system may be used in a fluid displacement apparatus to magnetically couple a drive shaft to a piston. The magnetic coupling system may include first and second magnetic couplers at the ends of the drive shaft and piston, respectively. The second magnetic coupler is configured to magnetically engage the first magnetic coupler and configured to mechanically engage the first magnetic coupler if the couplers disengage magnetically.