Additive Piston Housing with Nonlinear Fluid Passageways
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Solution Overview
Problem
Traditional piston housing manufacturing through forging introduces stress concentrations due to drilling of fluid passages and requires significant capital investment, limiting design flexibility and structural optimization.
Innovation Solution
The use of additive manufacturing techniques allows for the creation of topology-optimized piston housings with nonlinear embedded passageways, reducing stress concentrations and enabling design optimizations that cannot be achieved with traditional methods, such as forging and drilling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional forging and drilling methods are used to manufacture piston housing, then structural strength is maintained, but stress concentrations are introduced into fluid chambers
Solution Approach 1:
The patent replaces traditional mechanical drilling operations with additive manufacturing technology. Instead of drilling holes through the piston housing body, the system uses additive manufacturing to directly form integrated fluid passages within the housing structure, eliminating the mechanical stress concentrations that would result from drilling operations
Solution Approach 2:
The patent changes the manufacturing process parameters from subtractive (drilling) to additive (3D printing). This parameter change allows fluid passages to be formed as integral parts of the housing structure during the manufacturing process itself, rather than being created afterward through drilling, thereby avoiding stress concentrations
2Ease of manufacture
If traditional forging methods are used for piston housing, then capital investment is reduced, but design flexibility and structural optimization are limited
Solution Approach 1:
The patent segments the manufacturing process into additive manufacturing of the housing body followed by separate machining of mounting interfaces. This allows the main housing structure to be optimized additively while maintaining traditional machining capabilities for attachment points, balancing design flexibility with manufacturing simplicity
Solution Approach 2:
The patent transitions from two-dimensional drilling operations to three-dimensional additive manufacturing. This dimensional change enables complex internal fluid passage geometries that cannot be achieved with traditional drilling, allowing optimization of fluid flow paths and structural integrity simultaneously
3Ease of manufacture
If straight passages are drilled in forged structures, then manufacturing simplicity is maintained, but fluid flow optimization and structural integrity are compromised
Solution Approach 1:
The patent employs curved and nonlinear passage geometries formed through additive manufacturing instead of straight drilled passages. These curved passages optimize fluid flow dynamics by reducing turbulence and improving flow distribution, while the additive process maintains manufacturing simplicity by forming these complex geometries in a single operation
Data Source
Figure 1A
Figure 1B
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AI summary
A piston housing (200;400;500) manufactured by an additive manufacturing process is provided. The piston housing (200;400;500) may comprise a plurality of chambers (230;330;430;530). The chambers (230;330;430;530) may be in fluid communication with one another via non-linear fluid passageways (220;320). The non-linear fluid passageways (220;320) may be defined in structural members (420;520) configured to stiffen the piston housing.