Perforated Flow Guide Valve for Stable Switching
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Solution Overview
Problem
Existing valves experience flow-related influences that affect their switching behavior, leading to inefficiencies and increased sensitivity to manufacturing tolerances.
Innovation Solution
The valve design incorporates a partially perforated annular flow guide wall with an axially set-back front edge, which reduces flow speed and increases static pressure to maintain the open position, while fluid passage openings allow unhindered radial outflow, minimizing the influence of the flow guide wall on throughput and reducing manufacturing sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a flow guide wall is used to maintain constant flow cross-section, then flow control is improved, but flow-related influences on switching behavior increase
Solution Approach 1:
The flow guide wall is radially interrupted at several points to form fluid passage openings, segmenting the continuous wall structure. This segmentation allows the wall to guide flow effectively while reducing the overall flow-related influences on switching behavior by creating multiple smaller flow paths rather than one large continuous path.
Solution Approach 2:
The flow guide wall is positioned at a specific local region - axially setback from the closure surface reference plane. This local positioning creates a flow guide space that affects only the radial outflow region, leaving the axial flow path and switching behavior less affected by flow-related influences.
2Productivity
If the flow guide wall is positioned closer to the closure surface, then flow guidance is improved, but sensitivity to manufacturing tolerances increases
Solution Approach 1:
The flow guide wall is axially setback from the closure surface reference plane, creating a preliminary flow guide space before the fluid reaches the closure surface area. This preliminary positioning allows flow guidance to occur at a distance, reducing the sensitivity to manufacturing tolerances of the closure surface and valve seat interface.
3Reliability
If dynamic pressure is increased to hold the valve open, then open position stability is improved, but actuation force requirements increase
Solution Approach 1:
The flow guide space acts as an intermediary structure between the inlet channel and the outlet channel. It provides a controlled path for fluid to sweep past the front side of the valve member, creating a more stable flow pattern that maintains open position stability without requiring excessive actuation force.
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 enables the valve to be held in the open position with reduced dynamic pressure, requiring lower actuation forces and maintaining efficiency across varying flow speeds, while minimizing the impact of manufacturing tolerances.
Implementation Method 1
The fluid flowing into the valve chamber sweeps past the front side of the valve member, although it also enters the flow guide space and is partially backed up by the perforated flow guide wall. The result is a reduction in the flow speed and, associated with this, an increase in the static pressure, so that the valve member can be held in the open position with the support of dynamic pressure.
Implementation Method 2
The fluid flowing into the valve chamber sweeps past the front side of the valve member, although it also enters the flow guide space and is partially backed up by the perforated flow guide wall. The result is a reduction in the flow speed and, associated with this, an increase in the static pressure
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
The invention relates to a valve (1) used for controlling the flow of a fluid, comprising a valve chamber (3) formed in a valve housing (2), into which an inlet channel (4a) and an outlet channel (5a) open. The channel opening (7) of the inlet channel (4a) can be optionally closed or opened by a movable valve element (13). On the front side facing the channel opening (7), the valve element (13) comprises an annular flow guiding wall (44), which is radially interrupted at multiple points, such that a dynamic pressure can be partially formed, having a positive effect on the operating behaviour of the valve element (13).