Throttle Element Inlet Geometry for Uniform Flow and Lower Cavitation
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Solution Overview
Problem
Existing throttling elements in process plants suffer from cavitation and wear due to non-uniform fluid flow patterns, leading to inefficiencies and reduced service life.
Innovation Solution
The throttling element design features frustoconical inlet regions with a cone angle of 15° to 75°, followed by spherical regions, ensuring uniform fluid distribution and minimizing turbulence through seamless transitions, along with channel sections that increase in cross-section to manage fluid velocity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional throttle channels with straight or simple curved paths are used, then the structure is simple and easy to manufacture, but non-uniform fluid flow patterns occur leading to cavitation and wear
Solution Approach 1:
The patent applies spherical curvature to the inlet region of the throttle channel, creating a spherical inlet opening instead of a conventional straight or simple curved path. This spherical geometry guides the fluid flow in a curved trajectory, ensuring uniform distribution across the channel cross-section and preventing cavitation and wear, thereby extending the service life of the throttling element.
Solution Approach 2:
The patent changes the geometric parameters of the throttle channel inlet by introducing a spherical shape with a specific radius (R1) and defining a cone angle (α) between the frustoconical and spherical regions. These parameter optimizations create ideal flow conditions that eliminate harmful flow patterns while maintaining manufacturing feasibility.
2Reliability
If the entire channel cross-section is utilized for flow, then flow distribution becomes uniform reducing cavitation and wear, but complex inlet geometry is required to achieve seamless transitions
Solution Approach 1:
The spherical inlet opening with radius R1 provides a smooth, continuous curved surface that seamlessly transitions from the frustoconical region. This spherical geometry naturally guides fluid particles along curved paths, ensuring uniform flow distribution across the entire channel cross-section without creating dead zones or turbulence, while remaining manufacturable through standard machining or additive processes.
Solution Approach 2:
The patent applies different geometric characteristics to different regions of the inlet: a frustoconical section with angle α for initial flow direction control, followed by a spherical section with radius R1 for uniform distribution. This local differentiation of geometric quality optimizes flow patterns in each zone while maintaining overall manufacturability.
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 reduces cavitation and wear by optimizing fluid flow, utilizing nearly the entire channel cross-section and extending the service life of the throttling element.
Implementation Method 1
the frustoconical inlet region acts as a centering mechanism, improving the flow of the process fluid into the inlet openings
Implementation Method 2
the subsequent spherical region ensures a uniform distribution of the process fluid before it enters the subsequent channel sections of the throttle channels
Implementation Method 3
rounded transition areas are formed between the frustoconical inlet areas and the subsequent spherical areas, according to the invention. A rounded transition area is to be understood in particular as a smooth or edgeless transition between the frustoconical inlet area and the spherical area
Data Source
Figure 1
Figure 2~3
AI summary
The invention relates to a throttle element (100) for reducing the pressure of a process fluid, comprising a throttle body that has multiple throttle channels (104) through which the process fluid is to flow, wherein each throttle channel (104) has an upstream inlet opening (106), a channel section (108), and a downstream outlet opening (110) when viewed in the flow direction (S). The invention is characterized in that the inlet openings (106) are designed to have a truncated conical inlet region (106-1) which tapers in the flow direction (S) and a spherical region (106-2) adjoining said inlet region.