Electromagnetic Valve Stop Surface for High-Frequency Wear Reduction
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Solution Overview
Problem
Existing valves experience material wear and malfunctions due to high stress at narrow contact areas, particularly when frequently switched, leading to unreliable functionality.
Innovation Solution
The valve design features a large-area stop surface formed by the end face of the outer core and the separating ring, with the inner core set back to create an axial clearance, allowing for a recessed welding surface that reduces stress and enables precise welding with low heat input, enhancing mechanical protection and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a narrow contact area is used between the armature disk and magnetic head, then the valve structure is compact, but high stress leads to material wear and malfunctions
Solution Approach 1:
The invention transitions from a narrow line contact to a large-area planar contact by extending the stop surface in radial and axial directions. The stop surface is formed by the end face of the outer core and the end face of the separating ring, creating a two-dimensional contact area that distributes stress uniformly across the surface, eliminating the high-stress narrow contact point while maintaining compact valve geometry.
2Volume of stationary object
If the inner core is positioned close to the stop surface, then the valve is space-efficient, but welding requires high heat input causing thermal distortion
Solution Approach 1:
The invention segments the magnetic head structure by introducing an axial clearance between the inner core and the stop surface. This clearance creates a spatial separation that allows the weld surface to be positioned axially recessed from the stop surface, enabling low-heat-input welding processes without thermal distortion of the stop surface, while the overall magnetic head volume remains compact through optimized radial positioning.
3Productivity
If high switching frequencies are used, then valve productivity increases, but material wear at the contact area accelerates
Solution Approach 1:
The invention implements preliminary action by designing a large-area stop surface before the valve enters high-frequency operation. The extended stop surface, formed by both the outer core end face and separating ring end face, pre-distributes the contact stress across a large area, preventing the development of high-stress concentration points that would otherwise lead to rapid wear during high-frequency switching operations.
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 provides a large-surface stop for the magnet armature, ensuring permanent and reliable functionality while minimizing material wear and heat distortion, making the valve suitable for high-pressure applications with reduced maintenance needs.
Implementation Method 1
a magnetic head (2) having a non-magnetizable separating ring (25) arranged between an inner core (15) and an outer core (16)
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to a valve (100) for gaseous and liquid media, comprising a valve body (1), a flat armature (10), and an electrically controllable magnetic head (2), which has an electromagnetic coil (19), an inner core (15), an outer core (16) and a dividing ring (25, 34) arranged between the latter, the end face part (28) of which, together with a front face (27) of the outer core (16), form a stop surface (29, 38) for the flat armature (10) on one and the same plane.