Static Mixer Blade Geometry for Low Pressure Drop Mixing
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Solution Overview
Problem
Conventional static mixers suffer from pressure variations and temperature fluctuations due to dead spots and changing viscosities, limiting their utility in applications requiring steady output pressure and consistent low internal temperatures.
Innovation Solution
A static mixer design with a housing and mixing element featuring an elongated blade oriented longitudinally within the mixing cavity, free from impingement surfaces perpendicular to fluid flow, and an integrated jacket for temperature control, minimizing pressure drop and maintaining consistent mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional static mixers use fixed baffles to generate turbulence for mixing, then mixing effectiveness is improved, but pressure variations and dead spots are created causing temperature fluctuations and limiting utility
Solution Approach 1:
The mixing element is divided into multiple discrete mixing sections arranged in series along the flow path. Each section contains mixing blades that create localized turbulence, while the segmented structure eliminates dead spots and ensures continuous material movement throughout the mixer, preventing temperature fluctuations caused by stagnant zones.
Solution Approach 2:
The mixing blades are designed with curved surfaces that follow the flow direction, creating smooth transitions and eliminating sharp corners where dead spots would form. The curved geometry promotes continuous turbulence generation while maintaining steady material flow and consistent temperature distribution.
2Reliability
If conventional static mixers create turbulence through baffles, then mixing is enhanced, but pressure drop increases reducing energy efficiency
Solution Approach 1:
The mixing element design creates dynamic flow patterns where material continuously changes direction and velocity as it passes through successive mixing sections. This dynamic mixing approach generates sufficient turbulence for effective mixing while maintaining lower overall pressure drop compared to conventional static baffle designs.
Solution Approach 2:
The mixing blade geometry and spacing are optimized to control the intensity and distribution of turbulence along the flow path. By adjusting these parameters, the mixer achieves effective mixing with minimized pressure drop, improving energy efficiency while maintaining mixing performance.
3Device complexity
If conventional static mixers operate with dead spots, then structural simplicity is maintained, but temperature control deteriorates limiting applications
Solution Approach 1:
The segmented mixing element structure eliminates dead spots while maintaining relative structural simplicity. Each mixing section is a discrete unit that can be manufactured separately and assembled in series, preserving manufacturing ease while achieving superior temperature control through continuous material flow and elimination of stagnant zones.
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 achieves reduced pressure drop, increased energy efficiency, and improved temperature control, enabling consistent mixing and expanded applications for curable compositions.
Implementation Method 1
fixed/motionless internal baffles that generate turbulence to produce mixing and dispersion effects
Implementation Method 2
an integrated jacket for temperature control
Implementation Method 3
increasing friction superheats the materials being mixed
Data Source
AI summary
A static mixer is disclosed. The static mixer comprises a housing (22) defining an internal mixing cavity (36) that longitudinally extends along a central axis between an inlet (38) and an outlet (40) and is adapted for axial flow of a fluid therethrough. The static mixer also comprises a mixing element (42) disposed within the mixing cavity (36). The mixing element (42) is configured to be free from an impingement surface oriented substantially perpendicular to a main direction of fluid flow through the internal mixing cavity (36). The mixing element (42) comprises an elongated mixing blade that is oriented longitudinally within the mixing cavity (36) and comprises a nose axially oriented toward the inlet (38). The static mixer may comprise a heat-exchanging jacket integrally formed with the housing (22). An additive manufacturing system comprising the static mixer, and methods of making and using the same, are also disclosed.