Fluid Controller Tubular Movable Member Disk Pressing
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Solution Overview
Problem
The existing fluid controllers require high precision in machining, leading to increased time and cost, with potential for uneven pressing forces due to machining inaccuracies, resulting in fluid leakage issues.
Innovation Solution
A fluid controller design featuring a tubular movable member that presses a flange portion of the disk instead of a columnar portion, reducing the distance between the movable member and diaphragm, and using separate components to minimize processing depth and material usage, allowing for improved precision and cost reduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the tubular movable member presses the upper surface of the disk at a distance from the diaphragm, then the structure allows for easier machining, but machining precision deteriorates leading to disk inclination and fluid leakage
Solution Approach 1:
The movable member is divided into two separate components: a tubular body for automatic opening/closing and a rodlike body for manual opening/closing. This segmentation allows each component to be optimized independently - the tubular body can be machined with standard precision while the rodlike body provides the pressing function close to the diaphragm, eliminating the need for high-precision machining of the tubular body's pressing surface.
Solution Approach 2:
The rodlike body acts as an intermediary between the manual operation and the disk pressing mechanism. It transmits the pressing force directly to the disk at a location close to the diaphragm, ensuring even pressure distribution without requiring the tubular body to be machined with high precision.
2Manufacturing precision
If high precision machining is applied to the tubular movable member and disk, then pressing force uniformity improves, but processing time increases
Solution Approach 1:
By separating the automatic control function (tubular body) from the manual pressing function (rodlike body), the invention eliminates the need for high-precision machining of the tubular body's pressing surface. The rodlike body, which requires high precision, can be manufactured separately with focused precision processing only where needed, significantly reducing overall processing time.
Data Source
AI summary
Provided is a fluid controller capable of cost reduction and performance improvement. Movable members 12 and 13 moved manually or automatically and for moving the disk 9 are tubular in shape and include a fitting portion 13a to be fitted to an outer periphery of the disk 9. The disk 9 is provided with a flange portion 9c, and the tubular movable members 12 and 13 are provided at a lower end portion thereof with a flange portion 35 to be brought into contact with the flange portion 9c of the disk 9 from above.