Eccentric Segmented Valve Closing Body Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing valve closing bodies lack improved closing behavior and robustness, which affects their performance and durability.
Innovation Solution
A valve closing body with a head formed by two segments of a geometric sphere, where the sphere's center is eccentric to the central longitudinal axis, allowing for better stress distribution and sealing, and optionally coated for enhanced durability and resistance to wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional valve closing body with a spherical head is used, then the structure is simple and easy to manufacture, but the closing behavior and robustness are insufficient
Solution Approach 1:
The valve closing body head is divided into multiple segments (first head segment and second head segment) that are joined together. This segmentation allows each segment to be optimized independently for stress distribution and sealing, while maintaining overall structural integrity and improving closing behavior without excessive complexity
Solution Approach 2:
The first and second head segments are designed with asymmetric geometries relative to each other, with different curvature radii and contact surface configurations. This asymmetric design enables optimized stress distribution across the sealing surfaces while maintaining manufacturing feasibility through standardized joining mechanisms
2Reliability
If the sphere center is positioned on the central longitudinal axis, then the manufacturing is easier, but the stress distribution and sealing efficiency are suboptimal
Solution Approach 1:
The sphere center is deliberately positioned eccentrically relative to the central longitudinal axis, creating asymmetric first and second head segments with different curvature radii. This asymmetric positioning optimizes the contact pressure distribution on the sealing surfaces, improving sealing efficiency while the segments are manufactured separately to accommodate the complex geometry
Solution Approach 2:
Different regions of the valve closing body head are given different geometric properties - the first head segment has a first curvature radius and the second head segment has a second curvature radius, both different from the main spherical radius. This local variation in geometry optimizes stress distribution in specific areas to enhance sealing efficiency
3Duration of action of stationary object
If the valve closing body is made without coatings, then the manufacturing cost is lower, but the wear resistance and lifespan are reduced
Solution Approach 1:
The valve closing body incorporates coating layers on the head segments that combine with the base material to create a composite structure. The coating provides enhanced wear resistance and extended lifespan, while the joining mechanism between segments and coatings is designed to be integrated into the manufacturing process, minimizing additional complexity
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a valve closing body comprising a bearing point (2) for connecting the valve closing body to a drive, comprising a valve closing body shaft (3), and comprising a valve closing body head (4) with an upper face (9), which faces the valve closing body shaft (3) and which forms a sealing circle (Dseal) of the valve closing body, and with a lower face. The valve closing body head (4) is formed at least by two segments of at least one geometric body. The invention likewise relates to a valve body seat which is produced according to the same principle as the valve closing body head.