Drying Grinding Machine Multi-Blade Radial Design
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Solution Overview
Problem
Conventional dry grinding machines face limitations in processing capability due to the axial length constraint of the rotating shaft, which restricts the enlargement of the grinding chamber volume, making it difficult to improve processing efficiency, especially when handling materials with high moisture content.
Innovation Solution
The dry grinding machine design features a rotating shaft fixed at both ends of the grinding chamber, with a tapered portion and blades arranged to optimize airflow and material processing, including a blowing section for hot air and high-pressure air sealing, enhancing the surface area ratio of blades to improve material drying and grinding efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the axial length of the rotating shaft is increased to enlarge the grinding chamber volume, then the processing capability is improved, but the structural complexity and manufacturing difficulty increase
Solution Approach 1:
The patent transitions from a conventional single-blade configuration to a multi-blade arrangement where blades are positioned at different angular positions around the rotating shaft. This spatial redistribution in the radial dimension allows the grinding chamber to effectively process material throughout its entire volume, overcoming the axial length limitation by utilizing radial and angular space more efficiently.
Solution Approach 2:
The grinding function is segmented across multiple blades rather than relying on a single blade. Each blade contributes to the overall grinding action, and their distributed arrangement allows the system to achieve higher processing capability without increasing the axial length of individual components, thereby resolving the contradiction between productivity and structural complexity.
2Productivity
If the grinding chamber volume is enlarged to improve processing efficiency, then the processing capability increases, but the axial length of the rotating shaft becomes a limiting factor
Solution Approach 1:
Instead of relying solely on axial length expansion, the patent utilizes the radial dimension by arranging multiple blades at different radii and angular positions. This allows the grinding chamber to effectively utilize its full volume for material processing, achieving higher processing efficiency without being constrained by the axial length of the rotating shaft.
Solution Approach 2:
The multi-blade configuration allows each blade to perform grinding functions while also contributing to material circulation and drying. This multi-functional arrangement maximizes the utilization of the grinding chamber volume, enabling the system to achieve high processing efficiency within the existing axial length constraints.
3Productivity
If multiple blades are arranged to increase processing capability, then the productivity improves, but the device complexity increases
Solution Approach 1:
The grinding function is divided into multiple segments, each handled by an individual blade positioned at specific angular intervals. This segmentation allows the system to achieve higher processing capability through distributed processing, while the modular nature of individual blades keeps the overall device complexity manageable compared to a single complex blade design.
Solution Approach 2:
Each blade is designed with specific local characteristics optimized for its position in the grinding chamber. The blades can have varying geometries and positions tailored to their specific functional requirements, allowing the system to achieve high processing capability while maintaining reasonable device complexity through localized optimization rather than uniform design.
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 allows for efficient processing of materials with high moisture content, such as biomass fuels and food products, by creating a swirling airflow that enhances drying and grinding, resulting in finer particle sizes and increased processing capacity without the need for frequent maintenance.
Implementation Method 1
blows hot wind along a line tangent to the grinding chamber in a cross section orthogonal to the rotating shaft
Implementation Method 2
A space between the second blade and the grinding chamber may be sealed by high-pressure air whose pressure is higher than atmospheric pressure
Implementation Method 3
a dry grinding machine that manufactures dry powder from a material to be processed containing moisture
Implementation Method 4
blows hot wind into the grinding chamber... enhances drying and grinding
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
To improve operating efficiency of a dry grinding machine, the dry grinding machine includes a rotating shaft; a first blade that is rotationally driven by the rotating shaft; a grinding chamber that houses the first blade; a feed-in section that feeds material to be processed, which is transported by hot wind into the grinding chamber from a direction intersecting the rotating shaft; and a discharging section that is arranged on a side of the first blade opposite the feed-in section, in an axial direction of the rotating shaft, and discharges from the grinding chamber, along with the hot wind, the material to be processed that has been ground by the first blade while being dried by the hot wind fed in from the feed-in section. The grinding chamber has a rotating body shape centered on the rotating shaft, and has a portion where an inner diameter becomes larger closer to the discharging section in the axial direction, at least on the discharging section side of the first blade.