Valve Seal Support Ring With Casing Wall for Precise Flow Metering
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Solution Overview
Problem
Existing seal support rings for valves, particularly vacuum valves, do not allow for precise metering of volumetric flow when the valve disc is near the closed position, limiting control over flow conditions.
Innovation Solution
A seal support ring design featuring a casing wall that surrounds the throughflow opening and protrudes from the basic body, creating a receiving space for the valve disc, enabling precise metering by allowing medium to flow through an annular space between the casing wall and the valve disc during opening and closing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a conventional seal support ring without a casing wall is used, then the structure is simple and easy to manufacture, but precise metering of volumetric flow near the closed position is not possible
Solution Approach 1:
The seal support ring is segmented into functional zones: the basic body provides structural support and sealing, while the separately formed casing wall creates the metering chamber. This segmentation allows each component to be optimized independently and assembled together, achieving precise flow metering without requiring complete redesign of the entire structure.
Solution Approach 2:
The casing wall is formed as an integral extension of the basic body, creating a nested structure where the metering chamber is formed within the overall seal support ring geometry. The casing wall protrudes from the basic body to create the receiving space, effectively nesting the flow control function within the sealing structure.
2Measurement precision
If the casing wall protrudes significantly from the basic body to create adequate receiving space, then flow metering precision improves, but the device dimensions increase
Solution Approach 1:
The casing wall protrudes partially from the basic body - enough to create the necessary receiving space for the valve disc during closing operation, but not excessively so as to create unnecessary dimensional increases. The protrusion distance is optimized to provide just sufficient space for accurate flow metering in the critical near-closed position range.
3Ease of manufacture
If the casing wall is formed separately and assembled to the basic body, then manufacturing flexibility improves, but assembly steps and potential leakage points increase
Solution Approach 1:
The casing wall and basic body are merged into a single integral component formed as one piece. This eliminates the need for separate assembly steps and removes potential leakage points at joints, while still allowing flexible manufacturing through appropriate forming processes. The integral structure ensures reliable sealing throughout the metering chamber.
Data Source
AI summary
A seal support ring (1) for a valve (2), particularly a vacuum valve, which has a throughflow opening (3) and a basic body (4), which annularly surrounds the throughflow opening, and a fastener arrangement (5) for fastening the seal support ring to a valve housing (6) of the valve. The basic body has a first side (7) on which the seal support ring, in a mounted state on the valve housing, lies against the valve housing, and the seal support ring has a seal ring (8) made from an elastomer which, in its position on the basic body, surrounds the throughflow opening. A casing wall (9) is arranged on the basic body and at least partially surrounds the throughflow opening and, on a second side (10) of the basic body (4) opposite the first side, protrudes from the basic body and has a larger inside diameter than the seal ring.