Integrated Control Valve Seal Structure for Rotation Stability
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Solution Overview
Problem
Multi-flow passage control valves face challenges in achieving high sealing reliability due to the separate structures of sealing members and elastic pads, which can lead to movement and reduced sealing effectiveness during valve core rotation.
Innovation Solution
A control valve design featuring a sealing component with an integral elastic pad and sealing member, where the elastic pad has through holes and recessed grooves that fit with protruding ribs from the valve body, preventing movement and enhancing static friction for improved sealing reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate structures of sealing member and elastic pad are used, then device complexity is reduced and ease of manufacture is improved, but sealing reliability deteriorates due to movement during valve core rotation
Solution Approach 1:
The patent combines the sealing member and elastic pad into a single integrated sealing component. The sealing member is formed as an integral structure with the elastic pad, eliminating the separate structures mentioned in the background. This merging ensures that the sealing member and elastic pad move together as one unit during valve core rotation, preventing relative movement between them and maintaining consistent sealing contact, thereby resolving the technical contradiction by improving sealing reliability without requiring complex separate structures.
2Reliability
If separate structures of sealing member and elastic pad are used, then ease of manufacture is improved, but sealing reliability deteriorates due to movement during valve core rotation
Solution Approach 1:
The sealing member and elastic pad are manufactured as a single integrated component, which can be produced using modern injection molding or extrusion processes that efficiently handle complex integral structures. The unified design eliminates the need for separate manufacturing and assembly steps for two distinct components, thereby maintaining ease of manufacture while significantly improving sealing reliability through the integrated structure that prevents relative movement during operation.
Solution Approach 2:
The elastic pad is designed as a flexible component with specific geometric features including a recessed portion and protruding portion. The recessed portion accommodates the sealing member while the protruding portion engages with the valve body, creating a flexible yet stable connection. This flexible shell design allows the sealing component to adapt to operational stresses while maintaining the integral structure that prevents movement, thus achieving high sealing reliability without compromising manufacturability.
3Reliability
If integral structure of elastic pad and sealing member is used, then sealing reliability is improved, but device complexity increases
Solution Approach 1:
The integral sealing component features localized geometric variations including a recessed portion and a protruding portion. The recessed portion is specifically designed to accommodate the sealing member, while the protruding portion engages with the valve body. These local structural features provide targeted functionality without requiring overall structural complexity, allowing the integral design to achieve high sealing reliability through localized quality enhancements rather than complex global structures.
4Reliability
If protruding portions abut against side wall portion, then sealing reliability is improved, but friction increases requiring more driving force
Solution Approach 1:
The elastic pad functions as a flexible component that dynamically adjusts its contact pressure with the valve body side wall. As the valve core rotates, the elastic pad deforms elastically to maintain optimal contact, distributing the frictional forces over a larger area and reducing peak stresses. This flexible behavior ensures reliable sealing through consistent contact while minimizing the total frictional resistance, thereby reducing the driving force required compared to rigid sealing structures.
Solution Approach 2:
The sealing component is designed to dynamically adapt during valve operation. The elastic pad's flexibility allows it to change its contact characteristics with the valve body side wall in response to operational conditions. During rotation, the elastic pad maintains continuous contact through elastic deformation, ensuring sealing reliability while the dynamic nature of the contact reduces cumulative friction compared to rigid structures that require higher sustained forces.
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
The integral sealing component effectively prevents movement and enhances sealing reliability by utilizing static friction between the elastic pad and the valve body, reducing the driving force required for valve operation and maintaining effective sealing during rotation.
Implementation Method 1
the protrusion portions abut against the side wall portion, which can improve the sealing reliability between the elastic pad and the side wall portion
Data Source
AI summary
Discloses is a control valve, comprising a sealing component. The sealing component is located between a side wall portion and a valve core component the sealing component comprises an elastic pad and a sealing member that are integrally formed; the elastic pad comprises a peripheral wall portion and protrusion portions; the elastic pad is provided with multiple first through holes and first grooves; the protrusion portions protrude from the peripheral wall portion; the first grooves are recessed in the peripheral wall portion; the protrusion portions surround the first through holes; the protrusion portions abut against the side wall portion; a valve body component is provided with ribs protruding from the side wall portion, and the ribs extend into the first grooves.