Electromagnetic Valve Support Part Diverts Axial Forces
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Solution Overview
Problem
Existing electromagnetic valve devices suffer from premature failure due to high dynamic axial forces causing cracks in the thin-walled armature guide tube, leading to leakage in safety-critical applications like vehicle brake systems.
Innovation Solution
A support part within the coil housing with an M-shaped cross-section, featuring a cylindrical part and obliquely extending web, is used to divert axial forces into the coil housing, reducing the load on the armature guide tube by providing additional contact surfaces and axial support, thereby preventing cracks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If the armature guide tube is made thin-walled to reduce weight and material usage, then the weight and material consumption decrease, but the tube becomes susceptible to cracking under high dynamic axial forces
Solution Approach 1:
A support part is introduced as an intermediary component between the armature guide tube and the coil housing. This support part absorbs and distributes the high dynamic axial forces, preventing them from concentrating on the thin-walled armature guide tube. The support part acts as a mediator that protects the fragile tube while allowing the overall structure to remain lightweight.
Solution Approach 2:
The support part extends radially inward from the coil housing wall toward the armature guide tube, creating a three-dimensional support structure. This radial extension provides additional spatial dimension for force distribution, allowing the thin-walled tube to be supported at multiple points along its length rather than relying solely on its own wall strength.
2Loss of substance
If the armature guide tube wall thickness is reduced to minimize material usage, then material consumption decreases, but the tube fails under impulse-like tensile forces and dynamic pressure forces
Solution Approach 1:
The support part serves as a protective intermediary that intercepts impulse-like tensile forces and dynamic pressure forces before they can act on the thin-walled armature guide tube. By positioning the support part radially between the tube and the coil housing, it mediates the force transmission path and prevents catastrophic failure of the tube.
3Reliability
If additional support structures are added to reinforce the armature guide tube, then the strength and reliability improve, but the device complexity increases
Solution Approach 1:
The support part is designed to perform multiple functions simultaneously: it provides structural reinforcement to the thin-walled armature guide tube, distributes axial forces, prevents tube failure under impulse loads, and maintains the overall geometric integrity of the valve assembly. This multi-functionality avoids the need for multiple separate reinforcement components.
Solution Approach 2:
The support part is integrated with the coil housing as a unified structural element. Rather than being a separate attached component, it is formed as an inherent part of the coil housing structure, merging the support function with the existing housing geometry and reducing the number of discrete parts.
4Reliability
If the armature guide tube is supported at both head and bottom parts, then the reliability improves by preventing cracks, but the device complexity increases due to additional support structures
Solution Approach 1:
The support part provides comprehensive support to both the head part and bottom part of the armature guide tube through its radially extended structure. A single support component achieves what would otherwise require multiple separate support elements, maintaining reliability while minimizing the number of structural features.
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 design enhances the service life and reliability of solenoid valves by distributing axial forces effectively, reducing the likelihood of armature guide tube failure and associated leakage.
Implementation Method 1
an electromagnetic coil (6) interacting with an armature body (2) and accommodated in a coil housing (4)
Data Source
Figure 1~2
AI summary
The invention relates to an electromagnetic valve device (1) having at least one electromagnetic coil (6) which interacts with an armature body (2) and is held in a coil housing (4), wherein the armature body (2) is guided in a fixed, hollow-cylindrical armature guiding tube (8) and can be abutted against a head part (10), closing off the armature guiding tube (8) on the head side, of the armature guiding tube (8), which armature guiding tube (8) extends through a passage opening (12) in the coil housing (4) and a central opening (14) in a yoke plate (16) which is on the floor side in relation to the coil (6), and engages at least partially under the yoke plate (16) with a radially outwardly projecting annular floor part (18). The invention provides that, in order to axially support the head part (10), a supporting part (28) of the coil housing (4) engages at least partially over said head part (10), wherein the supporting part (28) makes contact with the head part (10) in a contact region (30).