Electromagnetic Actuator Guide Sleeve Radial Guidance
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Solution Overview
Problem
Electromagnetic actuating devices for valves face challenges with radial parasitic air gaps, which reduce mechanical actuating forces and require additional components like sliding rings, leading to increased installation space and production-related dimensional deviations.
Innovation Solution
The armature is guided radially within the magnet yoke using a guide sleeve with an anti-adhesion device, reducing parasitic air gaps and eliminating the need for sliding rings, thereby enhancing actuating forces and reducing component count.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sliding ring is used to radially mount the armature in the armature chamber, then the armature can be radially guided, but the radial parasitic air gap is enlarged and the radial installation space is increased
Solution Approach 1:
The invention removes the sliding ring component from the system and replaces it with a guide sleeve that is axially fitted onto the armature. This extraction of the sliding ring eliminates the radial parasitic air gap it created while maintaining the essential function of radial guidance through the guide sleeve's cylindrical inner circumferential surface.
Solution Approach 2:
The guide sleeve combines multiple functions into a single component: it provides radial guidance for the armature through its cylindrical inner surface, prevents axial adhesion to the magnet yoke base through its anti-adhesion device, and eliminates the need for separate sliding rings. This merging reduces the overall radial installation space while maintaining reliability.
2Reliability
If a stop sleeve and sliding ring are attached to the armature to prevent axial adhesion, then the armature can be properly positioned, but the device complexity and component quantity are increased
Solution Approach 1:
The guide sleeve merges the functions of the stop sleeve and sliding ring into a single component. The cylindrical inner circumferential surface provides radial guidance while the anti-adhesion device at the end prevents axial adhesion to the magnet yoke base, eliminating the need for separate stop sleeves and sliding rings.
Solution Approach 2:
The guide sleeve is a multi-functional component that simultaneously provides radial guidance, prevents axial adhesion, and maintains proper armature positioning. This universal component replaces multiple specialized components (stop sleeve, sliding ring), reducing device complexity while maintaining all necessary functions.
3Reliability
If a sliding ring is used for radial mounting, then the armature can be guided, but the production-related dimensional deviations are increased
Solution Approach 1:
By removing the sliding ring and its associated ring groove from the armature, the invention eliminates the sources of production-related dimensional deviations. The guide sleeve, which is axially fitted onto the armature's hollow cylindrical end section, provides a more stable and precise radial guidance interface with fewer manufacturing variables.
4Reliability
If the radial parasitic air gap is enlarged by using a sliding ring, then the armature can be radially mounted, but the achievable mechanical actuating forces are reduced
Solution Approach 1:
The invention extracts the sliding ring that created the radial parasitic air gap and replaces it with a guide sleeve that maintains minimal radial clearance. This reduction in air gap size strengthens the magnetic field coupling between the armature and magnet yoke, thereby increasing the achievable mechanical actuating forces while maintaining reliable radial mounting.
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 higher actuating forces with reduced energy consumption and lower manufacturing costs, while maintaining high positioning accuracy and dimensional precision.
Implementation Method 1
an electrical coil (24) which coaxially encompasses the armature (28)
Implementation Method 2
the armature chamber (26) is delimited by a magnet yoke (18, 22)
Data Source
AI summary
A electromagnetic actuating device for a valve, having an armature arranged in a hollow cylindrical armature chamber axially displaceable between two axial stops, wherein the armature chamber is delimited by a magnet yoke. An electrical coil extends coaxially around the armature, and the magnet yoke is at least partially arranged in a housing. The armature has a cylindrical geometry with a base remote from the housing and with a hollow cylindrical end section situated axially opposite. The base is remote from the housing and connected to an actuating plunger. A guide sleeve is mounted axially onto the hollow cylindrical end section of the armature, and on that end of the guide sleeve which is remote from the actuating plunger, there is arranged or formed an adhesion prevention device which prevents or at least greatly impedes axial adhesion of the armature to the magnet yoke. The guide sleeve makes it possible to realize a reduction in width of the parasitic air gap between the armature and the magnet yoke in order to increase the actuating forces of the actuating device with simultaneously reduced number of components.