Throttle Channel Inlet Geometry for Cavitation and Wear Reduction

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Solution Overview

Problem

Existing throttle elements in process plants experience issues with cavitation and wear due to non-uniform fluid flow patterns, leading to inefficiencies and material degradation.

Innovation Solution

The throttle element design features truncated conical inlet regions with a taper angle of 15° to 75°, followed by a spherical region, ensuring uniform fluid distribution and minimizing turbulence through smooth transitions, along with increasing channel cross-sections to manage flow rates and prevent material damage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional throttle channels with simple geometries (round, square, or elongated holes) are used, then the device complexity is low and ease of manufacture is high, but non-uniform flow distribution occurs leading to cavitation and wear

Engineering Contradiction:

Improveresistance to cavitation and wearVSAvoidinlet opening geometry complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The inlet opening is segmented into two distinct functional regions: a truncated conical inlet region for flow centering and a spherical region for flow distribution. This segmentation allows each region to optimize its specific function, improving flow uniformity and reducing cavitation while maintaining manageable complexity through clear functional division.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different regions of the inlet opening are given different geometric qualities tailored to their specific functions. The truncated conical region provides a tapering structure for flow alignment, while the spherical region provides a rounded geometry for even flow distribution. This local differentiation of geometric properties optimizes flow characteristics at each location, reducing cavitation and wear.

Inventive Principle:

Principle #3Local quality

2Ease of operation

If the truncated conical inlet region with taper angle of 15° to 75° is used, then flow centering is improved, but manufacturing precision requirements increase

Engineering Contradiction:

Improveflow centering capabilityVSAvoidtaper angle control precision

Core Design Contradiction:

Ease of operationVSManufacturing precision

Solution Approach 1:

The taper angle of the truncated conical inlet region is optimized within a specific range (15° to 75°) to achieve effective flow centering. By defining this parameter range, the invention balances flow centering performance with manufacturing feasibility, allowing adequate tolerance while maintaining functional effectiveness. This parameter optimization resolves the contradiction between operational performance and manufacturing precision requirements.

Inventive Principle:

Principle #35Parameter changes

3Stability of the object's composition

If spherical regions are added to the inlet openings, then flow distribution uniformity is improved, but the device complexity and manufacturing difficulty increase

Engineering Contradiction:

Improveflow distribution uniformityVSAvoidinlet opening fabrication ease

Core Design Contradiction:

Stability of the object's compositionVSEase of manufacture

Solution Approach 1:

The spherical region in the inlet opening uses curved geometry to promote uniform flow distribution. The spherical shape naturally guides flow evenly across the outlet, reducing turbulence and improving flow uniformity. While curved surfaces are more complex than flat surfaces, the spherical geometry is a well-understood form that can be manufactured using standard techniques, balancing performance improvement with manufacturing feasibility.

Inventive Principle:

Principle #14Spheroidality (Curvature)

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, ensuring efficient and prolonged operation of the throttle element and control valve.

Implementation Method 1

the truncated conical inlet region provides a kind of centering effect to improve the flow of the process fluid into the inlet openings

Methodology Applied

Scientific EffectGeometric centering effect:

Implementation Method 2

the adjoining spherical or ball-shaped region allows the process fluid to be evenly distributed before it enters the subsequent channel sections of the throttle channels

Methodology Applied

Scientific EffectFlow distribution through spherical geometry:

Implementation Method 3

throttle element for reducing the pressure of a process fluid

Methodology Applied

Scientific EffectPressure reduction: Pressure Drop

Data Source

PatentUS12584559B2Throttle element for reducing the pressure of a process fluid

Publication Date: 2026.03.24 SAMSON AG

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.