Poppet Valve Inlet Duct Segmentation for Compressor Wear Reduction
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Solution Overview
Problem
Existing poppet valves for piston compressors face issues with high pressure loss and wear when handling low-viscosity or gaseous fluids at high flow speeds, leading to rattling movements and increased maintenance needs.
Innovation Solution
A poppet valve design featuring a valve body with inlet ducts, a closing element, and a spring that applies a preload force, minimizing the likelihood of edge strikes and rattling, with a lightweight closing element and adaptive spring and valve seat geometry to ensure precise positioning and low wear, along with replaceable inlet parts and a longitudinal guide to prevent tilting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the gap is enlarged by lengthening the spring to reduce pressure loss, then pressure loss is reduced, but rattling movement intensifies and wear increases
Solution Approach 1:
The valve system is segmented into multiple independent inlet ducts, each with its own closing element and spring assembly. This allows individual optimization of each duct's flow characteristics while maintaining overall system reliability, as wear or failure in one duct does not affect others.
Solution Approach 2:
The closing element is pre-positioned by the spring to ensure controlled engagement with the valve seat. The spring preload and geometric constraints are designed in advance to prevent rattling movement during operation, eliminating the need for gap enlargement that would otherwise be required to reduce pressure loss.
2Reliability
If the closing element mass is reduced to lower wear, then wear is reduced, but stability during operation may be compromised
Solution Approach 1:
The closing element features an asymmetric geometry with a rounded end face that engages the valve seat at a specific point. This asymmetric design, combined with the spring constraint, provides both stability during operation and minimized contact area to reduce wear, while the lightweight construction is compensated by the precise geometric positioning.
Solution Approach 2:
The spring acts as an intermediary between the closing element and the inlet duct, providing the necessary stabilizing force without requiring the closing element itself to be heavy. The spring mediates the interaction, allowing a lightweight closing element to maintain stable operation through controlled positioning rather than mass.
3Reliability
If the closing element is designed to move freely to reduce wear, then wear is reduced, but rattling movement occurs and positioning precision is lost
Solution Approach 1:
The closing element has different geometric properties at different locations: a rounded end face for controlled engagement with the valve seat to minimize wear, and specific contour features that interact with the spring and inlet duct to prevent rattling. This local differentiation of geometric quality allows simultaneous achievement of low wear and precise positioning.
Solution Approach 2:
The spring and inlet duct geometry are designed to preemptively counteract any tendency toward rattling movement. The spring preload and geometric constraints are configured in advance to eliminate自由度 (degrees of freedom) that would cause rattling, while still allowing the closing element to move freely enough to minimize wear during the closing action.
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 reduces pressure loss, minimizes wear, and maintains precise operation with low mass and low structural depth, allowing for efficient fluid flow and reduced maintenance by enabling quick replacement of individual components.
Implementation Method 1
the spring has a first spring end section and a second spring end section, wherein the spring is arranged in the inlet duct, wherein the first spring end section is held on, and preferably bears against, the inlet duct, preferably the entrance section of the inlet duct, and wherein the second spring end section is connected to the closing element in order to subject the closing element to a preload force directed toward the valve seat
Data Source
AI summary
Poppet valve for a piston compressor, having a valve body with a plurality of inlet ducts, wherein each inlet duct has an inlet section and an outlet section. The outlet section opens into a valve seat, wherein each inlet duct is assigned a closing element and a spring. The closing element can be moved in an axial direction (A) in such a way that the valve seat can be closed by way of the closing element. The spring has a first spring end section and a second spring end section, wherein the spring is arranged in the inlet duct and bears with the first spring end section against and is held on the inlet section of the inlet duct. The second spring end section is connected to the closing element, to bring about a pre-stressing force on the closing element, which pre-stressing force is oriented towards the valve seat.