Magnetic Guide Sleeve for Electromagnetic Actuator
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Solution Overview
Problem
Electromagnetic actuators for valve arrangements face inefficiencies due to non-magnetic guide sleeves affecting magnetic characteristics and difficulties in matching actuating movements, leading to sealing element deformation and reduced effectiveness over time.
Innovation Solution
A magnetic guide sleeve is used to maintain a small clearance air gap and distribute magnetic forces over a large area, enhancing the guidance and force exertion on the armature, while a dual-spring mechanism ensures consistent contact pressure on valve seats, preventing deformation and improving sealing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a non-magnetic guide sleeve is used to guide the armature, then the armature guidance is provided, but the magnetic characteristics of the electromagnetic actuator deteriorate due to the gap between the armature and magnetic return path device
Solution Approach 1:
A magnetic guide sleeve is introduced as an intermediary component between the non-magnetic guide sleeve and the armature. This magnetic guide sleeve extends into the clearance air gap and provides magnetic guidance for the armature, thereby maintaining good magnetic characteristics while still allowing mechanical guidance to be provided by the non-magnetic guide sleeve.
2Ease of operation
If a separate non-magnetic guide sleeve is used within the coil arrangement, then the armature can be guided axially, but the effectiveness and efficiency of the switching magnet are reduced
Solution Approach 1:
The guide sleeve and magnetic return path device are merged into a single integrated component. The guide sleeve is designed with a magnetic return path device that is connected to the housing, allowing it to provide both mechanical guidance for the armature and serve as part of the magnetic return path, thereby improving switching magnet efficiency while maintaining guidance functionality.
3Adaptability or versatility
If the valve control lever is pivoted between sealing positions, then valve positioning is achieved, but sealing elements are plastically deformed over time by the valve seat
Solution Approach 1:
The valve control element is designed with a degree of freedom that allows it to tilt or pivot dynamically during operation. This dynamic adjustment capability enables the valve control element to adapt to variations in the valve seat geometry and maintain optimal sealing contact without causing plastic deformation of the sealing elements, thereby preserving sealing effectiveness over time.
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 solution results in a more efficient electromagnetic actuator with improved sealing performance and reduced sticking issues, maintaining high efficiency and reliability over time by minimizing magnetic interference and ensuring precise guidance and force distribution.
Implementation Method 1
When the coil arrangement is excited, a force is exerted on the armature, depending on the length of the working air gap
Implementation Method 2
A magnetic guide sleeve is used to maintain a small clearance air gap and distribute magnetic forces over a large area, enhancing the guidance and force exertion on the armature
Data Source
AI summary
An electromagnetic actuator is disclosed. The actuator has a coil arrangement which can be excited electrically, and has an armature. The armature is mounted such that it can move axially in the coil arrangement, is composed of soft magnetic material, and is moved in the axial direction when the coil arrangement is excited. A guide sleeve is fixed in the coil arrangement and guides the armature in the axial direction. The guide sleeve is produced from a soft magnetic material.