Electromagnetic Valve Wear-Resistant Anchor Plate Stop
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Solution Overview
Problem
Electromagnetic valves experience malfunctions and failure due to magnetic sticking caused by wear of the end stop, leading to inconsistent performance and reduced lifespan, especially when contaminated with mineral particles.
Innovation Solution
Incorporating a second elastic stop surface that maintains a magnetic air gap and provides an additional restoring force, using a Viton or plastic element that accumulates and compresses mineral particles, reducing wear on the primary stop and preventing magnetic sticking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single end stop is used, then the valve can be simpler in structure, but the end stop wears out due to mineral particles causing magnetic sticking and valve failure
Solution Approach 1:
The end stop is divided into two separate stop surfaces: a first stop surface that provides the primary stopping function, and a second stop surface that serves as a backup and damping element. This segmentation allows the first stop to be simple while the second stop compensates for wear and prevents magnetic sticking, thereby improving reliability without significantly increasing overall complexity.
Solution Approach 2:
The second stop surface is designed with a resilient element (such as a spring or elastic material) that provides cushioning and damping before the anchor plate contacts the first stop surface. This beforehand cushioning absorbs shock and reduces wear from mineral particles, preventing premature failure and magnetic sticking while maintaining a relatively simple structural design.
2Duration of action of stationary object
If the end stop is made more durable to resist wear, then the service life increases, but the valve structure becomes more complex
Solution Approach 1:
The end stop functionality is segmented into two distinct surfaces: the first stop surface handles normal operation stopping, while the second stop surface with resilient element handles wear compensation and shock absorption. This segmentation extends the service life of the end stop system without requiring a single overly complex durable component.
Solution Approach 2:
The second stop surface incorporates a resilient element that changes its mechanical parameters (such as stiffness or damping characteristics) based on wear conditions and operating forces. This allows the end stop to adapt to wear over time, extending service life while maintaining a manageable structural complexity through parameter variation rather than structural complexity.
3Reliability
If mineral particles are allowed to accumulate in the stop element, then wear of the first stop is reduced, but the stop element may stick or adhere
Solution Approach 1:
The second stop surface acts as an intermediary between the anchor plate and the first stop surface. It captures and contains mineral particles in its resilient structure, preventing them from directly wearing the first stop surface. The intermediary design allows particle accumulation without causing sticking, as the resilient element accommodates particles without creating adhesion conditions.
Solution Approach 2:
The second stop surface with resilient element creates a duplicate or backup stopping function that can accommodate mineral particles. Instead of allowing particles to cause wear on the primary stop, the resilient second stop captures particles in a controlled manner, providing a copy of the stopping function that is tolerant to contamination without generating harmful sticking effects.
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
Ensures reliable valve operation over a longer service life by preventing magnetic sticking and maintaining consistent closing times, while reducing wear on the primary stop and enhancing durability against contamination.
Implementation Method 1
The force on the anchor plate depends on an air gap between the magnetic yoke and the anchor plate
Implementation Method 2
An additional restoring force is therefore generated by the compression of the Viton stop (Viton®)
Data Source
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AI summary
The invention relates to an electromagnetic valve with a valve chamber (11) having an inlet opening (16) for supplying a liquid and at least one outlet (2) for discharging the liquid. The valve (1) comprises a valve seat (12) and a valve element (14) associated with the valve seat (12), wherein, when the valve element (14) closes the valve seat (12), the flow connection between the inlet opening (16) and the outlet (2) of the valve (1) is interrupted. The valve element (14) is held on an anchor plate (6), which is moved by an electromagnetic actuator (7) against an end stop (4) formed by a first stop surface (81).In order to ensure the operational capability of the valve (1) in the event of wear of the end stop (4), it is provided that a second stop surface (68) is assigned to the anchor plate (6), which forms a subordinate end stop (5) after a predetermined wear of the first stop surface (81).