Electromagnetic Valve Pin Structure for Low-Wear Fast Switching
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Solution Overview
Problem
Conventional electromagnetic valves face issues with wear and slow operation due to direct contact between metal plungers and resin valve elements, and increased weight of high-hardness valve elements, which hinders smooth operation.
Innovation Solution
The design includes a solenoid with a bobbin and coil generating magnetic force to move a plunger, a flow path member with relay flow paths, and a valve element housing a pin that reduces weight and prevents wear by using a resin bobbin and soft magnetic materials, allowing smooth movement and efficient switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a metal plunger is used in direct contact with a resin valve element, then the valve element can be actuated, but wear and damage occur due to direct contact between metal and resin
Solution Approach 1:
A resin plunger is introduced as an intermediary component between the metal solenoid and the resin valve element. This resin plunger transfers the actuating force while being made of the same material as the valve element, eliminating direct metal-resin contact and preventing wear and damage.
2Reliability
If a high-hardness valve element is used to increase durability, then wear resistance improves, but the valve element weight increases and operation speed decreases
Solution Approach 1:
The valve element is made from resin material with optimized physical parameters that provide sufficient durability without the excessive weight of high-hardness metals. The resin material achieves an optimal balance between strength, weight, and operational speed.
3Speed
If a resin valve element is used to reduce weight, then operation speed improves, but wear and damage resistance deteriorates when in direct contact with metal plunger
Solution Approach 1:
The resin plunger acts as a mediator that protects the resin valve element from direct contact with metal components. Both the plunger and valve element are made of resin material, creating a non-wearing interface that maintains both light weight and high wear resistance.
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 wear and weight, enabling quick and smooth switching between open and closed states, improving the operational efficiency of the electromagnetic valve.
Implementation Method 1
a coil wound around an outer peripheral portion of the bobbin and generating a magnetic force with energization to move the plunger in the axial direction
Data Source
AI summary
Provided is an electromagnetic valve capable of preventing damage due to wear while preventing an increase in weight of a valve element. The electromagnetic valve includes a solenoid having a plunger movably supported along an axial direction, a flow path member having a fluid passage flow path and a valve element housing portion, and a valve element disposed in the valve element housing portion and movable along the axial direction together with the plunger. The valve element includes a body part, a valve part that opens and closes the fluid passage flow path as the plunger moves, and a pin in a rod-like shape that passes through the body part along the axial direction. The body part is provided with at least one opening that opens in a direction orthogonal to the axial direction and through which the pin is exposed.