Micronization Device With Segmented T-Blades
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Solution Overview
Problem
Existing micronization devices based on the disintegrator concept face inefficiencies in particle size reduction due to the conventional geometry and arrangement of blades on rotating discs, limiting the effectiveness of the micronization process.
Innovation Solution
The device features blades shaped like the letter 'T' with a specific angle of 120-140° relative to the disc's rotation direction, arranged in identical wreaths on opposite discs, enhancing the frequency and energy transfer of particle collisions for improved micronization efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional blade geometry is used on rotating discs, then the device structure is simple, but the micronization efficiency is limited
Solution Approach 1:
The blade is divided into multiple functional segments: a leading edge portion, a body portion, and a trailing edge portion. This segmentation allows each part to perform a specific function - the leading edge initiates particle breakdown, the body provides sustained cutting action, and the trailing edge completes the size reduction. This segmented design increases micronization efficiency without requiring an entirely new blade configuration.
Solution Approach 2:
The blade incorporates curved and angled surfaces rather than flat, conventional geometries. The leading edge is curved to optimize impact angles, the body has inclined surfaces for efficient material engagement, and the trailing edge is angled to promote particle ejection. These curved geometries enhance the mechanical action on particles, improving size reduction efficiency.
2Productivity
If blades are arranged in standard wreaths on discs, then the arrangement is simple, but particle collision frequency is insufficient
Solution Approach 1:
The blades in adjacent wreaths are arranged asymmetrically relative to each other, creating a staggered configuration. This asymmetric arrangement ensures that particles passing between the discs encounter blades at optimal angles and positions, maximizing collision frequency. The asymmetry prevents particles from simply passing through gaps without interaction, thereby enhancing micronization effectiveness.
Solution Approach 2:
The blade arrangement extends into the radial dimension with blades positioned at different radii on the same disc, creating multiple interaction zones. Particles are subjected to micronization forces at various radial positions as they pass through the disc gap, increasing the number of effective collisions and improving overall particle size reduction efficiency.
3Use of energy by moving object
If high speed rotation is used, then particle collisions increase, but energy transfer efficiency is limited
Solution Approach 1:
The blade geometry parameters are optimized to change the nature of energy transfer from the rotating discs to the particles. The leading edge angle, body inclination, and trailing edge configuration are specifically designed to maximize the transfer of kinetic energy from the high-speed discs to the particles during collision, ensuring that the increased rotation speed translates efficiently into effective micronization rather than just increased velocity.
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 configuration increases the efficiency of the micronization process by 17-19% in producing fine particles, particularly at sizes of 1.5 and 10 µm, by maximizing fluid energy transfer and promoting turbulent flows that enhance mutual particle collisions.
Implementation Method 1
the milling process is mainly effected by the collisions of particles of material being milled with hitting elements of device
Implementation Method 2
promoting turbulent flows that enhance mutual particle collisions
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention relates to the device for micronization of solid materials. The device is consisting of housing (4) with two discs (6a, 6b), separately driven by motors (2a, 2b) through axles (3a, 3b), in such a manner that mentioned discs (6a, 6b) rotate in opposite directions. Each of discs (6a, 6b) bears at least two or more wreaths of blades (8a, 8b) in such a way that two adjacent wreaths that belongs to different discs do rotate, relatively one to another, in opposite directions, thus forming an area where micronization of material is taking place. The wreaths of blades (8a, 8b) of different discs (6a, 6b) are faced one against another. All blades (7) of wreaths (8a, 8b) are identical, of shape of the letter „T", and comprise of three wings (7a, 7b, 7c); wings (7a) and (7b) are dimensionally identical and set under the right angle, whereas the wing (7c) is set dimensionally larger that wings (7a, 7b). Centerline of all three wings meet each other in the center of the blade (10), on the circle that goes through half of the wreath (8a, 8b). In comparison to the prior art, the present invention provides increasing of micronization efficiency by 17-19%.