Two-Stage Rotor Refining Structure for Complete Pulverization
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Solution Overview
Problem
The turbo type fine crusher described in JP-A-11-276916 has a narrow gap between the rotor and the liner, leading to issues where larger raw materials may not enter, resulting in incomplete pulverization due to remaining material in front of the rotor.
Innovation Solution
A refining device with a casing, rotor, and liner configuration that includes a first and second rotor portion separated by a partition wall, allowing raw material to be refined through sequential passage between blades and the liner, ensuring complete pulverization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the gap between the rotor and liner is narrowed to improve pulverization efficiency, then the pulverization quality is improved, but larger raw materials cannot enter the gap, causing incomplete pulverization
Solution Approach 1:
The rotor is divided into two distinct rotor portions (first rotor portion with first blades and second rotor portion with second blades) separated by a partition wall. This segmentation allows different gap configurations in different sections, enabling the system to handle both large and small raw materials effectively while maintaining high pulverization quality.
Solution Approach 2:
The partition wall is positioned at an angle relative to the rotation shaft, creating a three-dimensional spatial arrangement. This angular positioning allows raw materials to be guided from the charging port through the first rotor portion and then to the second rotor portion, enabling sequential processing that accommodates various material sizes while maintaining effective gap contact for pulverization.
2Device complexity
If a single rotor structure is used to simplify device complexity, then the device structure is simplified, but raw material may remain in front of the rotor, causing incomplete pulverization
Solution Approach 1:
The rotor is divided into two distinct rotor portions (first rotor portion with first blades and second rotor portion with second blades) separated by a partition wall. This segmentation allows different gap configurations in different sections, enabling the system to handle both large and small raw materials effectively while maintaining high pulverization quality.
Solution Approach 2:
The first rotor portion performs preliminary pulverization on raw materials before they reach the second rotor portion. This staged approach ensures that larger materials are broken down first, preventing them from remaining in front of the rotor and ensuring complete pulverization in the second stage.
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 new configuration facilitates efficient defibration of raw materials, enhancing the defibration process by allowing materials to pass through multiple stages, improving the quality and consistency of the defibrated material.
Implementation Method 1
the raw material charged from the charging port is refined when sequentially passing between the gap portion and the adjacent first blades and when sequentially passing between the first blade and the liner and between the second blade and the liner
Data Source
AI summary
There is provided a refining device including: a casing; a rotor having a rotation shaft, a first rotor portion positioned on a charging port side, a second rotor portion positioned on a discharge port side, and a partition wall, and disposed on an inside of the casing; and a liner disposed on an inner surface of the casing along an outer periphery of the rotor, in which the first rotor portion has a plurality of first blades radially installed around the rotation shaft through a gap portion which is open on the charging port side and blocked by the partition wall, the second rotor portion has a plurality of second blades radially installed around the rotation shaft, and in a state where the rotor is rotating, the raw material charged from the charging port is refined when sequentially passing between the gap portion and the adjacent first blades and when sequentially passing between the first blade and the liner and between the second blade and the liner, and is discharged from the discharge port.