Solenoid Valve Base Structure Without a Sleeve Flange
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Solution Overview
Problem
The manufacturing cost of solenoid valves is increased due to the need for forming a flange on the sleeve to fasten the solenoid and valve portions, which complicates the structure and increases production expenses.
Innovation Solution
A solenoid valve design that incorporates a base portion with distinct inner diameters and a connection surface to fasten the solenoid and valve portions without a flange, simplifying the sleeve structure and reducing manufacturing costs by using a base portion that is press-fitted to the sleeve and arranged radially outside the magnetic attraction core.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a flange is formed on the sleeve to fasten the solenoid and valve portions, then the fastening strength is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The base portion is divided into two functional segments: a first inner diameter portion for fastening to the sleeve and a second inner diameter portion for arranging around the magnetic attraction core. This segmentation allows each portion to serve its specific function optimally without requiring a complex flange structure on the sleeve.
Solution Approach 2:
The base portion acts as an intermediary component that mediates the connection between the solenoid portion and the valve portion. Instead of directly fastening the solenoid to the sleeve or using a flange, the base portion serves as an intermediate fastening element that simplifies the overall structure while maintaining connection strength.
2Strength
If a flange is formed on the sleeve to fasten the solenoid and valve portions, then the fastening strength is improved, but the manufacturing cost increases
Solution Approach 1:
The base portion is divided into two functional segments: a first inner diameter portion for fastening to the sleeve and a second inner diameter portion for arranging around the magnetic attraction core. This segmentation allows each portion to serve its specific function optimally without requiring a complex flange structure on the sleeve.
Solution Approach 2:
The base portion is designed as a simple, inexpensive component that can be easily manufactured and replaced if necessary. By using a simple cylindrical structure with two different inner diameters rather than a complex flange, the manufacturing cost is significantly reduced while maintaining adequate fastening functionality.
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 simplifies the sleeve structure, reduces manufacturing costs, and maintains the integrity of the magnetic circuit while allowing for precise control of the fastening strength between the solenoid and valve portions, thereby enhancing the solenoid valve's performance and reliability.
Implementation Method 1
a coil that generates a magnetic force by energization
Implementation Method 2
a magnetic attraction core arranged to face a tip end surface of the plunger in the axial direction and magnetically attracts the plunger by the magnetic force generated by the coil
Data Source
AI summary
A solenoid valve has a valve portion and a solenoid portion. The valve portion includes a sleeve and a spool. The solenoid portion includes a yoke, a plunger, a stator core, and a base portion. The base portion includes a first inner diameter portion, a second inner diameter portion, and a connection surface that connects the first inner diameter portion and the second inner diameter portion to each other in a radial direction. The first inner diameter portion is fastened to a first outer peripheral surface of the sleeve. The second inner diameter portion is arranged radially outside a second outer peripheral surface of a magnetic attraction core. The base portion is in contact with the yoke. The connection surface and a sleeve end surface of the sleeve adjacent to the solenoid portion in the axial direction are spaced from each other in the axial direction.