Segmented Cavitation Boiler Design to Reduce Tolerance Accumulation
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Solution Overview
Problem
Conventional fluid devices, such as pumps and cavitation boilers, face challenges in maintenance complexity and tolerance issues due to their one-piece or two-piece designs, which lead to increased assembly complexity and potential misalignment, affecting efficiency and performance.
Innovation Solution
The design of a segmented cavitation boiler using individual rotor and stator segments that can be easily assembled and maintained, allowing for precise tolerances and reduced radial fluid travel, focusing cavitation work farther from the central axis, thereby enhancing efficiency and reducing assembly stack-up errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a one-piece or two-piece reaction chamber housing is used, then the device can be constructed by removing an end of the housing to access the rotor or stator, but the maintenance complexity increases and assembly stack-up errors occur
Solution Approach 1:
The reaction chamber housing is divided into multiple modular segments that can be independently removed and reassembled. Each segment contains specific rotor or stator components, allowing maintenance personnel to access and service individual components without disassembling the entire housing, thereby reducing maintenance complexity while preserving construction simplicity
2Productivity
If conventional multi-stage pump designs are used, then the device can pump fluid through multiple stages, but tolerance issues and misalignment affect efficiency and performance
Solution Approach 1:
The multi-stage pump is divided into independent modular stages, each with its own rotor-stator assembly. Each stage can be manufactured and assembled separately with controlled tolerances, then precisely positioned and locked into the housing. This segmentation prevents tolerance accumulation across multiple stages while maintaining multi-stage pumping capability
Solution Approach 2:
Each modular stage is pre-assembled and pre-aligned with precise tolerances before being installed into the final configuration. This preliminary assembly allows for quality control and tolerance verification at the component level, preventing misalignment issues in the complete multi-stage assembly
3Length of moving object
If the cavitation region is positioned closer to the central axis, then the radial fluid travel is shorter, but the cavitation capacity is reduced
Solution Approach 1:
The design extends the cavitation region in the axial dimension rather than relying solely on radial distance. By creating multiple cavitation zones distributed axially along the fluid path, the system achieves high cavitation capacity while maintaining reasonable radial dimensions, effectively trading radial space for axial space to optimize 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
This design significantly reduces maintenance complexity, maintains precise tolerances, and increases cavitation capacity within a given axial distance, making the system more efficient and easier to maintain by allowing individual segments to be machined and assembled with tighter tolerances, ultimately improving the overall performance of the fluid device.
Implementation Method 1
the outer surface of the rotor segment and the inner surface of the stator segment define a cavitation region therebetween... when the rotor segment rotates with respect to the stator segment, the first cavitation region is configured to generate cavitation in a fluid flowing radially outward
Data Source
AI summary
A cavitation boiler segment includes a rotor to be coupled with a rotating inner drum and a stator surrounding the rotor segment. The rotor and the stator each include drums with two banks of annular apertures, which overlap to define two cavitation regions. The rotor includes a web bifurcating the rotor between the apertures into an upstream side and a downstream side, each forming a separate fluid passage between a face of the rotor and a bank of apertures. The stator includes a casing enclosing the stator apertures in a fluid passageway. In operation, fluid flows into a first side of the rotor, across a first cavitation region and into the stator, then back across the second cavitation region and into the second side of the rotor where the fluid may flow into a first side of an adjacent segment.