Soil Classifier Fluid Dynamic Bearing Shaft Support
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Solution Overview
Problem
Existing machines for particle size reduction of solids in a liquid vehicle are complex, heavy, and require frequent maintenance due to submerged bearings, which can lead to process contamination and increased costs.
Innovation Solution
A self-supporting dispersing apparatus with fluid dynamic bearing films supported by submerged bearing surfaces, a self-centering pumping screw housed in a conduit, and a fully articulated motor platform, reducing complexity, weight, and maintenance needs by intentionally pumping and reducing particle size through bearing gaps, and using a constant-forced compression clamping mechanism to secure the drive shaft.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If submerged bearings are used to support the shaft assembly, then shaft stability is improved, but device complexity and maintenance requirements increase
Solution Approach 1:
The patent removes traditional submerged bearings and shaft support structures from the system. Instead of using bearings to support the shaft, the invention uses the fluid dynamic bearing film formed by pumping process material through the shaft to provide support, thereby extracting the complex bearing assembly and reducing device complexity while maintaining shaft stability
Solution Approach 2:
The system uses the process material being pumped to create the bearing film that supports the shaft assembly. The pumped material itself serves the dual function of being processed and providing bearing support, eliminating the need for separate bearing components and reducing maintenance requirements
2Stability of the object's composition
If traditional drive mechanisms with bearings are used, then shaft support is improved, but weight and portability worsen
Solution Approach 1:
The patent extracts heavy bearing housings, shaft end supports, and complex drive mechanisms from the system. The shaft assembly is supported by the fluid dynamic bearing film formed during pumping, eliminating the need for heavy mechanical support structures and significantly reducing machine weight for improved portability
Solution Approach 2:
The invention replaces traditional mechanical bearing support systems with a fluid dynamic bearing film. The bearing support function is achieved through hydrodynamic forces in the pumped material rather than mechanical contact bearings, reducing weight while maintaining shaft stability
3Productivity
If high speed rotating shafts are used for particle size reduction, then productivity is improved, but shaft deflection and bearing wear increase
Solution Approach 1:
The pumped process material creates a bearing film that continuously lubricates and supports the high speed rotating shaft assembly. The shaft is supported by the very material being processed, which prevents shaft deflection and eliminates bearing wear even at high operating speeds, maintaining both productivity and reliability
Solution Approach 2:
The system uses hydrodynamic forces from the pumped liquid slurry to form a bearing film that supports the shaft assembly. This hydraulic bearing mechanism allows high speed rotation without mechanical contact, preventing wear and maintaining shaft reliability during intensive particle size reduction operations
4Stability of the object's composition
If submerged bearings are used, then shaft support is improved, but process contamination risk increases
Solution Approach 1:
The patent removes all submerged bearings and mechanical contact components from the process environment. The shaft assembly is supported by a fluid dynamic bearing film formed by the pumped material, eliminating sources of metal wear and contamination that would otherwise enter the process stream
Solution Approach 2:
The process material itself forms the bearing film that supports the shaft, eliminating the need for separate bearing components that could wear and contaminate the process. The bearing surface is created by the process material rather than by separate mechanical components
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 apparatus achieves efficient particle size reduction and deconglomeration with reduced complexity, weight, and cost, while preventing contamination and maintaining a portable, self-supporting design for soil classification and dispersion.
Implementation Method 1
fluid dynamic bearing films supported by submerged bearing surfaces
Implementation Method 2
The surfaces develop a fluid dynamic bearing film as the radial bearing support of a shaft assembly
Implementation Method 3
The shaft assembly has an integral self aligning pumping screw housed within a bearing post conduit
Implementation Method 4
intentionally pumping and particle size reduction of process components and liquid vehicle through bearing gaps
Implementation Method 5
intentionally pumping and particle size reduction of process components and liquid vehicle through bearing gaps
Implementation Method 6
particle size reduction of solids within a liquid vehicle
Implementation Method 7
fully articulated motor mounting platform providing multiple degrees of freedom
Data Source
AI summary
A lightweight soil classifier consisting of a singular motor, a fully articulated flexible Vierendeel frame motor mount platform and conical basket lid weldment for the self-aligning and centering of a rotating shaft through a cylindrical screened classifier basket containing classified media, with an impervious conical bottom and a cylindrical bearing post incorporating a conduit, a classifier drive shaft with a semi-rigid coupling to the motor and a pumping screw extending through the bearing post conduit and submerged bearing surfaces to develop fluid dynamic bearing films of fine soils and liquid vehicle, fitted with an inverted cup-shaped classifier head consisting of outwardly projecting spirally arrayed classifier pins located within the confines of the classifier basket. Along with a rotating blade fastened to the tip of the classifier shaft below the basket bottom, the soil classifier is self-supported on feet within and on the floor of a vessel enabling a process for the deconglomeration, dispersion, particle size reduction and classification of soils all to within a common size.