Centrifuge Rotor With Integral Depth Filter For Neutral-Density Contaminant Removal
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Solution Overview
Problem
Current centrifuge systems are unable to effectively remove small particles and neutral-density contaminants like sludge/varnish compounds from engine oil, which can cause wear and corrosion in diesel engines, despite the use of full-flow and bypass filters.
Innovation Solution
A centrifuge design incorporating a rotor with a depth filter medium and a split flow configuration, where a portion of the fluid is bypassed to maintain rotor speed, allowing for the removal of neutral-density contaminants and fine particulates through a tortuous flow path and chemical neutralization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a centrifuge is used to remove small particles from fluid, then particle removal capability is improved, but the ability to remove neutral-density contaminants like sludge/varnish compounds is lost
Solution Approach 1:
The centrifuge separates contaminants into different zones based on density: a first zone removes particulate matter through centrifugal force, while a second zone removes neutral-density contaminants through a depth filter medium. This segmentation allows each zone to specialize in removing specific contaminant types without interfering with the other's effectiveness.
Solution Approach 2:
A depth filter medium is introduced as an intermediary component in the second zone to capture neutral-density contaminants that cannot be removed by centrifugal force alone. The filter medium acts as a mediator between the fluid flow and the contaminants, enabling removal of sticky contaminants without compromising the centrifugal separation of particulate matter.
2Object-affected harmful factors
If depth filter medium is added to the centrifuge, then neutral-density contaminant removal is improved, but device complexity increases
Solution Approach 1:
The depth filter medium is integrated directly into the centrifuge rotor structure, merging the filtration function with the existing centrifugal separation system. This integration allows the centrifuge to perform both particulate matter removal and neutral-density contaminant removal within a single device, reducing overall system complexity compared to using separate filtration systems.
Solution Approach 2:
The centrifuge is designed with multi-functionality to handle both particulate matter removal through centrifugal force and neutral-density contaminant removal through the depth filter medium. This universal design allows a single device to address multiple contaminant types that would otherwise require separate specialized systems.
3Object-affected harmful factors
If all fluid flows through the depth filter medium, then contaminant removal is improved, but rotor speed decreases due to pressure drop
Solution Approach 1:
The fluid flow is segmented into two paths: a first path allows fluid to bypass the depth filter medium and drive the rotor, while a second path forces fluid through the depth filter medium to remove neutral-density contaminants. This segmentation ensures that sufficient fluid reaches the rotor to maintain speed while still achieving effective contaminant removal through the filter medium.
Solution Approach 2:
Instead of forcing all fluid through the depth filter medium, the system applies partial action by allowing a portion of the fluid to bypass the filter. This partial flow through the filter medium is sufficient to remove contaminants while avoiding excessive pressure drop that would reduce rotor speed, optimizing the balance between filtration effectiveness and rotational performance.
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 solution enables efficient separation of small particles and neutral-density contaminants, reducing engine wear and corrosion by ensuring the entire fluid supply is cleaned over time, while maintaining operational speed and capacity.
Implementation Method 1
a rotor configured to rotate for separating particulate matter from a fluid
Implementation Method 2
the filter element includes depth filter medium for removing from the fluid contaminants having the same general density as the fluid
Data Source
AI summary
A centrifuge includes a rotor with one or more drive jet openings for rotating the rotor to separate particulate matter from a fluid. A filter element is disposed inside the rotor, and the filter element includes depth filter medium for removing from the fluid sticky contaminants having the same general density as the fluid, such as sludge or varnish compounds. The rotor has a split flow configuration in which a portion of the fluid is routed to the filter element and the rest of the fluid bypasses the filter element to maintain fluid pressure of the fluid discharged from the drive jet openings. In one form, the depth filter medium is impregnated with a chemical that changes a property of the fluid, like acidity. In another form, the depth filter material is contained in a capsule for easy disposal.