Overflow Valve Sealing Ring Radial Axial Integration
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Solution Overview
Problem
Existing overflow valves for compressed air systems face issues with part complexity, assembly effort, size, weight, and potential jamming due to tilting sealing bodies and lack of radial sealing, leading to leaks and malfunction.
Innovation Solution
A simplified design using a single sealing ring for both radial and axial sealing, with a semicircular cross-sectional geometry and annular grooves to reduce friction and compensate for wear, eliminating the need for additional radial seals and allowing precise adjustment of the compression spring's preload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sealing body is used in overflow valves, then axial sealing is achieved, but the sealing body can tilt and jam in the cylinder, leading to malfunction
Solution Approach 1:
The patent combines radial sealing and axial sealing functions into a single sealing ring component. The sealing ring has a U-shaped cross-section with radial sealing surfaces on its outer diameter and an axial sealing surface on its inner diameter, eliminating the need for separate radial and axial sealing components and preventing tilting issues.
Solution Approach 2:
The sealing ring serves multiple functions simultaneously: it provides radial sealing against the cylinder wall through its outer diameter, provides axial sealing against the valve seat through its inner diameter, and guides the piston movement. This multi-functional design simplifies the overall valve structure while improving reliability.
2Reliability
If separate radial and axial sealing rings are used, then reliable sealing is achieved, but the number of parts, assembly effort, size and weight increase
Solution Approach 1:
The patent merges two separate sealing functions (radial sealing and axial sealing) into a single integrated sealing ring component. The U-shaped cross-section design allows the sealing ring to contact both the cylinder wall radially and the valve seat axially simultaneously, reducing the total number of parts while maintaining sealing reliability.
3Reliability
If the sealing ring has a large contact area with the cylinder wall, then radial sealing is improved, but friction increases and response behavior deteriorates
Solution Approach 1:
The sealing ring's outer diameter features localized sealing zones rather than continuous contact. The U-shaped cross-section creates specific contact points with the cylinder wall that provide sufficient radial sealing while minimizing the total contact area, thereby reducing friction and improving response speed.
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
This design enhances the response behavior, reduces manufacturing costs, and extends the service life of the overflow valve by ensuring reliable sealing and reduced friction, while maintaining a compact and cost-effective structure.
Implementation Method 1
a piston which is prestressed by means of a compression spring
Implementation Method 2
piston pretensioned by a compression spring
Implementation Method 3
the radial outside of the sealing ring bears against the cylinder on the inside, creating a radial press fit
Implementation Method 4
creating a radial press fit
Implementation Method 5
the sealing ring is lifted off the valve seat when the overflow valve is in an open state after a predetermined limit pressure of the fluid has been exceeded
Implementation Method 6
fluid pressure acts, increases at the same time
Data Source
AI summary
The invention relates to an overflow valve (10) for a gaseous fluid, having a piston (26) which is prestressed by means of a compression spring (28) and is received in a cylinder (16, 18) of the overflow valve (10) such that it can be displaced along a longitudinal centre axis (14). Moreover, it is provided in said overflow valve that a sealing ring (42) for radial and axial sealing is arranged on a piston underside (40), that the radial outer side (48) of the sealing ring (42) bears against the cylinder (16, 18) on the inner side with the formation of a radial press fit, that the sealing ring (42) bears against a hollow-cylindrical valve seat (44) in a closed state of the overflow valve (10) as a consequence of the prestress of the compression spring (28), and that the sealing ring (42) is raised up from the valve seat (44) with the formation of an annular gap (82) in an open state of the overflow valve (10) after a predefined limit pressure of the fluid is exceeded, in order to release a flow path (84) for the fluid.