Multi-Passage Control Valve Sealing Structure for Smooth Rotation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Multi-passage control valves face challenges in achieving effective sealing, leading to potential rotation blockage, increased driving force, and fluid leakage due to inadequate contact area and friction between the valve core and sealing components.
Innovation Solution
A control valve design incorporating a sealing component with an elastic pad and a sealing member in an integral structure, featuring a hemming portion and a fitting portion with outward bending portions that increase contact area and improve collision performance, preventing rotation blockage and fluid leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional sealing structure is used in a multi-passage control valve, then the device complexity is reduced, but the sealing performance deteriorates leading to fluid leakage
Solution Approach 1:
The patent combines the elastic pad and sealing member into an integral structure, merging two separate sealing components into one unified component. This integration maintains effective sealing across multiple passages while reducing the number of separate parts, thus improving sealing performance without proportionally increasing device complexity
Solution Approach 2:
The sealing member is divided into distinct functional portions: a hemming portion for edge support and a fitting portion for contact with the valve core component. This segmentation allows each portion to perform its specific sealing function optimally, improving overall sealing performance across multiple passages
2Ease of operation
If the contact area between the valve core component and sealing component is small, then the device complexity is reduced, but the friction increases causing rotation blockage
Solution Approach 1:
The elastic pad provides dynamic adaptation to the valve core component's rotation, maintaining consistent contact pressure throughout the rotation range. This dynamic sealing approach ensures smooth rotation without blockage while managing the complexity through the elastic material's inherent properties
Solution Approach 2:
The outward bending portion extends in a radial direction perpendicular to the main sealing surface, creating an additional dimensional feature that increases contact area. This dimensional extension improves rotation smoothness by distributing contact pressure without significantly increasing overall structural complexity
3Power
If the sealing component has insufficient collision performance, then the device complexity is reduced, but the driving force increases due to rotation blockage
Solution Approach 1:
The hemming portion with outward bending acts as a pre-designed cushioning feature that absorbs collision impacts between the valve core component and sealing component. This beforehand cushioning prevents rotation blockage and reduces the driving force required, while the structure remains integrated and relatively simple
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 design enhances the sealing performance by increasing adhesion force and reducing friction, ensuring reliable operation within the rotation tolerance range of the valve core component.
Implementation Method 1
the elastic pad is located between the sealing member and the side wall portion
Implementation Method 2
the fitting portion is in contact with and in sliding fit with the valve core component
Data Source
AI summary
Disclosed is a control valve, which may comprise a valve body component, a valve element component and a sealing component. The valve body component comprises a side wall part and the sealing component comprises an elastic pad and a sealing member The sealing member comprises a sealing main body part comprising a flanging part and a matching part, which are connected to each other; the matching part makes contact with the valve element component and is in sliding fit with the valve element component the elastic pad is provided with a first through hole, and the first through hole is in communication with a communication hole; the sealing member is provided with a second through hole, and the second through hole is in communication with the communication hole by means of the first through hole.