Solenoid Valve Iron Core Layout for Low-Noise Pilot Opening
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Solution Overview
Problem
Existing solenoid valves experience significant collision noise and damage due to the large spacing between the movable and static iron cores, leading to high-speed collisions when attracted.
Innovation Solution
The solenoid valve design includes a housing assembly with a movable upper and lower iron core, an on-off assembly, and a push rod system, where the maximum spacing between the cores is set equal to the opening degree of the pilot valve port, reducing the moving speed and collision risk, and features like constraint channels, elastic members, and annular sealing rings for smooth operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If the spacing between movable iron core and static iron core is increased, then the opening degree of pilot valve port is improved, but the collision speed and noise increase
Solution Approach 1:
The iron core is divided into two separate parts: a movable iron core and a static iron core. This segmentation allows the movable iron core to move a limited distance to open the pilot valve port, while the static iron core remains fixed. The spacing between them is precisely controlled to provide adequate opening degree without excessive collision speed, resolving the contradiction between valve port opening and collision impact.
2Object-affected harmful factors
If the spacing between movable iron core and static iron core is reduced, then collision noise is reduced, but the opening degree of pilot valve port is insufficient
Solution Approach 1:
A push rod is introduced as an intermediary mechanical element between the movable iron core and the on-off assembly. When the movable iron core is attracted to the static iron core, it pushes the push rod to transmit force and open the main valve port. This intermediary mechanism allows the iron cores to maintain a larger spacing for adequate pilot valve opening while the push rod ensures reliable force transmission without excessive collision impact.
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 reduces collision noise and damage, allows for high-frequency operation, and extends the service life of the solenoid valve while maintaining a reliable and smooth opening and closing mechanism.
Implementation Method 1
a coil assembly, provided on the housing assembly; an upper iron core, movably provided in the installation cavity; a lower iron core, movably and elastically provided in the installation cavity and located below the upper iron core
Implementation Method 2
an elastic member and an upper push rod; wherein an end of the elastic member abuts against the housing assembly, an other end of the elastic member abuts against an end of the upper push rod
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A solenoid valve, including: a housing assembly (10), an installation cavity (11) being provided in the housing assembly; wherein the housing assembly has a first flow port (12), a second flow port (13), and a main valve port (17) located between the first flow port and the second flow port; and an on-off assembly (20), movably provided in the installation cavity; wherein the on-off assembly is used for controlling opening or closing of the main valve port, so as to realize connection and disconnection between the first flow port and the second flow port. The solenoid valve is in communication with the first flow port by providing the installation cavity, thereby avoiding a problem of a relatively large pressure difference between the first flow port or the second flow port with respect to the installation cavity inside the solenoid valve, further ensuring the smoothness and reliability of opening or closing of the solenoid valve, and avoiding a problem of failure of the solenoid valve, such that the solenoid valve has a simple overall structure, and is convenient to install and maintain.