Jet Mill With Corrugated Frame for Throughput
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Solution Overview
Problem
Conventional jet mills have a relatively low throughput per energy cost, limiting their efficiency in grinding or pulverizing materials.
Innovation Solution
A mill design featuring a grinding chamber with a rotating shaft, a disk-shaped rotary member, and a corrugated cylindrical frame member that accelerates a solid-gas two-phase flow to collide against the inner peripheral surface, enhancing grinding efficiency and throughput without the need for an air jet nozzle or collision plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional jet mill structure with air jet nozzle and collision plate is used, then grinding function is achieved, but throughput per energy cost is low
Solution Approach 1:
The invention extracts and eliminates the air jet nozzle and collision plate from the conventional jet mill structure. By removing these components, the system achieves grinding through a different mechanism (rotating body with circular member creating centrifugal force) that improves energy efficiency and throughput, directly resolving the contradiction between productivity and energy loss
Solution Approach 2:
The invention replaces the pneumatic jet mechanism (air jet flow) with a mechanical rotation system (rotating body generating centrifugal force). This substitution creates a more efficient energy conversion pathway, transforming electrical/mechanical energy directly into grinding action rather than through intermediate pneumatic processes, thereby improving throughput per energy cost
2Manufacturing precision
If air jet nozzle and collision plate are used for grinding, then particle size reduction is achieved, but device size is large
Solution Approach 1:
By extracting and removing the air jet nozzle and collision plate components, the invention significantly reduces the device volume while maintaining the core grinding function. The compact rotating body structure replaces the spatially extensive pneumatic system, achieving particle size reduction in a more compact footprint
Solution Approach 2:
The invention merges the grinding function into the rotating body itself, which simultaneously serves as both the drive mechanism and the grinding element. The circular member on the rotating body integrates the functions of acceleration and impact, eliminating the need for separate nozzle and collision plate components, thereby reducing overall device size
3Manufacturing precision
If conventional jet mill structure is used, then grinding action is achieved, but device complexity is high
Solution Approach 1:
The invention removes the complex pneumatic system components (air jet nozzle, collision plate) and replaces them with a simpler rotating body mechanism. This extraction reduces structural complexity while preserving the essential grinding action through centrifugal force and impact
Solution Approach 2:
The rotating body is designed to perform multiple functions simultaneously: it generates centrifugal force to accelerate particles, provides the circular member for impact grinding, and maintains the grinding chamber environment. This multi-functionality reduces the number of separate components needed, thereby simplifying the overall device structure
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 mill increases throughput per energy cost, reduces particle size effectively, and can be downsized due to the elimination of conventional structure components, while maintaining efficient grinding performance.
Implementation Method 1
is circled in the grinding chamber while being accelerated by the rotating body
Implementation Method 2
collides against the inner peripheral surface and the circular member to grind or pulverize the particles
Implementation Method 3
reduces the particle size and enhances the grinding effect by diffused reflection of the circled particles by the frame member of the corrugated shape
Data Source
Figure 1
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Figure 3
AI summary
The object of the invention is to solve the problem of the relatively low throughput per energy cost in the conventional jet mill. A mill 1 includes a grinding chamber 2, a rotating shaft 3 located in the grinding chamber 2, a rotating body 5 structured to have a rotary member 4 fixed to the rotating shaft 3, a casing 6 provided to form an outer shell of the grinding chamber 2, an inlet 7 arranged to supply a solid-gas two-phase flow K containing particles and a gas to the grinding chamber 2, and an outlet 8 arranged to discharge the solid-gas two-phase flow K from the grinding chamber 2. A cylindrical frame member 9 having an inner peripheral surface 9a formed in a corrugated shape is located in the casing 6. The solid-gas two-phase flow K supplied via the inlet 7 into the grinding chamber 2 is circled in the grinding chamber 2, while being accelerated by the rotating body 5. The circling solid-gas two-phase flow K collides against the inner peripheral surface 9a, so that the particles are ground or pulverized. The frame member 9 having the inner peripheral surface 9a is arranged coaxially with the rotating shaft 3 and is located adjacent to the inner peripheral surface of the casing 6. The particles colliding against the frame member 9 move at random and thereby collide with one another.