Open Vessel Rotor for Liquid-Driven Centrifugal Separation
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Solution Overview
Problem
Existing centrifugal separation apparatus for internal combustion engine oils face challenges in achieving high rotational speeds efficiently, particularly due to limited motive power sources and design constraints such as cost, complexity, and size, which hinder effective removal of small particulates like soot.
Innovation Solution
The design incorporates a rotor with a walled contaminant separation and containment vessel featuring a helical collection impeller mechanism that constrains liquid to follow a helical path, allowing energy transfer through a larger surface area and efficient rotation, utilizing the contaminated liquid as both the cleaning medium and drive fluid, and includes a discharged liquid guide to minimize rotation impedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If traditional cylindrical vessel centrifugal separators are used, then structural simplicity is maintained, but rotational speed is limited due to high power requirements and filled-vessel construction constraints
Solution Approach 1:
The patent transitions from a static filled-vessel design to a dynamic open-vessel design where the liquid level is controlled to create a rotating shell rather than rotating a full container. This dynamic adjustment of liquid volume reduces the moment of inertia and power requirements, enabling higher rotational speeds
Solution Approach 2:
The patent changes the operating parameters by controlling the liquid supply rate to be less than the outlet passage capacity, maintaining a specific liquid level in the open vessel. This parameter control optimizes the balance between centrifugal separation effectiveness and rotational speed achievement
2Productivity
If open vessel design is used to reduce power consumption and increase speed, then rotational efficiency improves, but liquid control and separation stability become more challenging
Solution Approach 1:
The system uses the liquid itself to drive the rotor through impeller interaction, eliminating the need for external power sources. The liquid automatically regulates the system - when rotation speed increases, centrifugal force pushes liquid outward, naturally balancing the drive force and creating a self-regulating mechanism
Solution Approach 2:
The liquid serves multiple functions simultaneously: it is the medium being separated, the drive force for rotation, and the containment material. This multi-functionality simplifies the overall system by eliminating separate drive mechanisms while maintaining separation effectiveness
3Manufacturing precision
If high rotational speeds are achieved for better separation of small particulates, then separation effectiveness improves, but motive power requirements increase beyond available limits
Solution Approach 1:
The patent uses hydraulic principles by utilizing the liquid flow itself to drive the rotor through impeller interaction. The liquid pressure and flow rate are converted directly into rotational motion, providing an efficient power transmission mechanism that eliminates mechanical power transmission losses
Solution Approach 2:
The patent replaces traditional mechanical drive systems (motors, belts, gears) with a fluid-driven system where the liquid itself provides the driving force. This substitution eliminates the need for external power sources and mechanical transmission components, reducing both power requirements and system complexity
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 enhances rotational speed and efficiency, ensuring effective separation and containment of contaminants while minimizing energy wastage and maintaining a stable separation environment, thus overcoming the limitations of traditional designs.
Implementation Method 1
Rotational energy for the whole rotor is derived by causing a jet of liquid or other fluid to impinge on reaction turbine vanes, buckets or like surfaces which react to liquid impingement to drive the rotor
Implementation Method 2
the liquid impinging on the surface is caused by what is conventionally called centrifugal action to collect and spread as a film and migrate longitudinally upwardly and radially outwardly, acquiring by frictional drag a rotational velocity close to, but less than, that of the vessel outer peripheral wall
Implementation Method 3
the liquid impinging on the surface is caused by what is conventionally called centrifugal action to collect and spread as a film and migrate longitudinally upwardly and radially outwardly
Implementation Method 4
The advantages of centrifugal separation in internal combustion engine oil filtration is well documented in the art
Data Source
AI summary
A centrifugal separation rotor for an apparatus, which removes contaminants from a pumped liquid, such as engine lubricant, by rotating it about axis at high speed includes a separation and containment vessel that permit liquid to leave the vessel as fast as it can enter, so that a zone is defined adjacent a side wall that holds a volume of liquid less than the whole volume encompassed by the vessel walls and filled in conventional high speed separators. A divider wall surface is interrupted by a set of upstanding vanes, which extend along it and around the axle as a helix of such pitch as to form both collector vanes to guide liquid entering between the rotating vanes towards the transfer passage. Motor vanes receive one or more jets of liquid impinging thereon at a glancing angle to drive the rotor before being guided along the inlet zone.