Electromagnetic Valve Assembly for NO-to-NC Conversion
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Solution Overview
Problem
Existing electromagnetic valve devices are difficult to convert from normally open (NO) to normally closed (NC) operation without significant design changes, and the required connections between armature and valve gate assembly groups are sensitive to faults and vibration loads, especially when made of magnetically relevant materials.
Innovation Solution
The electromagnetic valve device incorporates axial flow-conducting channel sections in the valve housing that allow for NC functionality by blocking fluid paths in the unenergized state and opening them upon energization, eliminating the need for tensile-loaded connections and enabling conversion from NO to NC operation with minimal design changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the valve device is designed for normally closed (NC) operation with tight connections between armature and valve gate assembly, then the fluid path can be blocked in unenergized state, but the connections become sensitive to faults and vibration loads
Solution Approach 1:
The invention divides the valve system into separate modular components: the valve gate assembly group (28) and the actuator assembly group (10) with armature means (12, 14). These segments interact through non-tight connections, allowing each module to be optimized independently and reducing the transmission of vibration loads through connection points.
Solution Approach 2:
The valve housing (26) with axial flow-conducting channel sections (50) serves multiple functions: it guides the valve gate assembly, provides fluid pathways, and enables both normally open and normally closed operational modes through the interaction of channel sections with the valve gate in different positions, eliminating the need for separate connection mechanisms.
2Adaptability or versatility
If the valve device is converted from normally open (NO) to normally closed (NC) operation, then the default fluid path blocking is achieved, but significant design changes and additional expenditure are required
Solution Approach 1:
Instead of using tight mechanical connections to achieve NC operation, the invention inverts the approach by using the absence of armature engagement to block fluid paths. The axial flow-conducting channel sections (50) are designed to be blocked by the valve gate assembly in the unenergized state, achieving NC functionality without additional connection mechanisms or design changes to the actuator.
Solution Approach 2:
The valve gate assembly group (28) self-regulates fluid flow based on its position relative to the axial flow-conducting channel sections (50). When the armature is retracted, the valve gate naturally blocks the channel sections, achieving NC operation automatically without requiring additional actuating mechanisms or complex connection systems.
3Reliability
If tight connections are made between armature means and valve gate assembly group, then the valve can be actuated reliably, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The system is divided into separate actuator and valve gate modules that interact through simple non-tight connections. This segmentation allows each module to maintain its functional integrity independently while reducing the complexity of inter-module connections, as the valve gate assembly can be actuated by the armature through push-only contact without requiring rigid mechanical coupling.
4Force
If the armature means are firmly connected to the valve gate assembly group, then the force transmission is efficient, but the device becomes sensitive to vibration loads and faults
Solution Approach 1:
The connection between the armature means and valve gate assembly group is made dynamic rather than static. The valve gate assembly is preloaded by a compression spring (32) against the armature plunger, creating a flexible contact that maintains force transmission efficiency during normal operation while allowing relative movement and isolation during vibration events, preventing force transmission of vibrational loads.
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 solution allows for easy conversion between NO and NC operations with reduced production costs and increased usability, maintaining the actuator design and avoiding sensitive connections, thus enhancing reliability and automatability in series production.
Implementation Method 1
an armature or yoke section 18, a magnetically conductive housing section 20 on the jacket side as well as a left-hand front-sided lid or yoke section 22 so that the actuator is moved along the arrow direction in FIG. 5 upon energization
Implementation Method 2
A compression spring 32, which is provided in the right-hand end area of the valve gate assembly group 28 and repels itself from a front-side end area (in the area of the pressure port P), preloads the valve gate assembly group 28 against the armature means 12, 14
Data Source
AI summary
An electromagnetic valve device including armature means (12, 14), which are movable along an axial direction for actuating a valve gate assembly group (28) in reaction to energizing stationary spool means (16), and which are accommodated in an actuator housing (17, 19, 20, 22) preferably as a component unit and/or module in conjunction with the spool means and stationary core means and take up an inserted and/or retracted armature position (FIG. 1) in an unenergized state of the spool means, said valve gate assembly group (28), which is guided in a valve housing (26), being realized at one axial end for a contacting interaction, which cannot endure tensile load, with the armature means (14) and being realized such that a fluid path from a first fluid port (P) of the valve housing to a second fluid port (A) of the valve housing can be opened or blocked depending on an axial position of the valve gate assembly group, said valve housing (26) including at least one axial fluid-conducting channel section (50) on the interior so as to interact with the valve gate assembly group (28) guided therein, in particular at the axial end side opposite to the armature means, said channel section (50) being realized such that the valve gate assembly group (28) blocks the fluid path in the axial position of the valve gate assembly group corresponding to the inserted and/or retracted armature position and said valve gate assembly group (28) opening the fluid path via the flow-conducting channel section (50) in an axial position of the valve gate assembly group, which is moved out of the inserted and/or retracted armature position.