Electromagnetic Valve Radial Movement Restriction
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Solution Overview
Problem
The existing electromagnetic valve technology experiences increased friction between the plunger and the valve seat due to the armature's rotation, restricting the plunger's movement and affecting the valve's operation.
Innovation Solution
The design includes a solenoid with a cylindrical non-magnetic member, a movable magnetic armature with a restriction portion, and a plunger with specific radial movement restrictions, ensuring that the maximum radial space between the armature and cylinder is less than the minimum radial space between the plunger and the restriction portion, reducing friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the radial space between the armature and cylinder is reduced to improve valve response, then the valve response speed is improved, but the armature may contact the cylinder, increasing sliding resistance
Solution Approach 1:
The patent optimizes the parameter of radial space (CLa) between the armature and cylinder to achieve the desired balance. By setting CLa to a specific range, the system ensures that the armature can rotate sufficiently to reduce sliding resistance while maintaining a small enough radial space to improve valve response speed. This parameter optimization resolves the contradiction between response speed and sliding resistance.
2Object-affected harmful factors
If the radial space between the plunger and restriction portion is increased to reduce plunger rotation, then the friction between plunger and valve seat is reduced, but the plunger movement is overly restricted
Solution Approach 1:
The patent optimizes the parameter of radial space (CLb) between the plunger and restriction portion to achieve the desired balance. By setting CLb to a specific range, the system limits plunger rotation sufficiently to reduce friction with the valve seat while maintaining enough radial space to allow the plunger to move freely when needed. This parameter optimization resolves the contradiction between friction reduction and movement freedom.
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 reduces friction between the plunger and the valve seat, stabilizing the valve's operation and maintaining consistent valve-opening amounts regardless of power supply variations.
Implementation Method 1
a solenoid configured to generate an electromagnetic force by receiving power supply
Data Source
AI summary
An electromagnetic valve including a solenoid to generate an electromagnetic force; a cylindrical member at least partially disposed in the solenoid and made from a non-magnetic material; a movable member configured to be moved in the cylindrical member in an axial direction of the valve based on the solenoid, the movable member including a restriction portion on one end side of the movable member; a plunger including one end portion located on the one end side and an opposite end portion located on an opposite end side of the movable member, the plunger being restricted in a movement thereof in a radial direction due to the opposite end portion disposed at the restriction portion. A movable amount of the movable member in the radial direction in the cylindrical member is less than a movable amount of the plunger in the radial direction relative to the restriction portion.