Co-rotatable Pump Assembly with Nonstandard Hub Ratio
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Solution Overview
Problem
Existing pump assemblies with rotary type positive displacement mechanisms face limitations in efficiently managing fluid flow due to standard hub diameter to hub length ratios, which restrict their ability to pump fluids at optimal rates and pressures.
Innovation Solution
The pump assembly incorporates a unique design with a non-standard ratio of hub diameter to hub length for its charge, inversion, and scavenge pump rotors, allowing them to be co-rotatable and capable of pumping a specific amount of fluid in gallons per minute at a given revolutions per minute, utilizing spline couplings and annular blades to facilitate efficient fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If standard hub diameter to hub length ratio is used for rotary pumps, then manufacturing and assembly are simplified, but pumping efficiency and fluid flow management are limited
Solution Approach 1:
The patent applies parameter changes by modifying the hub diameter to hub length ratio from standard proportions to nonstandard proportions. This dimensional parameter change enables the rotary pumps to achieve improved pumping efficiency and fluid flow management while maintaining the overall simplicity of the assembly through a unified nonstandard ratio across all pump rotors.
2Area of stationary object
If multiple rotary pumps with different functions are integrated into a single assembly, then space utilization is improved, but coordination and synchronization of fluid flow become more complex
Solution Approach 1:
The patent merges multiple rotary pumps (charge pump, inversion pump, and scavenge pump) into a single integrated assembly sharing a common drive mechanism and housing. This consolidation improves space utilization while the unified nonstandard hub ratio design ensures coordinated operation of all pumps through synchronized rotational motion, simplifying fluid flow coordination despite the multi-functionality.
3Productivity
If nonstandard hub diameter to hub length ratio is used, then pumping capability and fluid flow efficiency are enhanced, but manufacturing precision requirements increase
Solution Approach 1:
The patent implements parameter changes by establishing a unified nonstandard hub diameter to hub length ratio for all rotary pumps in the assembly. This approach enhances fluid flow efficiency and pumping capability while managing manufacturing precision requirements through consistent application of the nonstandard ratio across all components, reducing the complexity of maintaining tight tolerances.
Data Source
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AI summary
A pump assembly (10) is provided and includes a housing (20) having first, second and third pairs of fluid openings (203, 204; 206, 207; 209, 210) and first, second and third rotary pumps (41, 42, 43), which are co-rotatable about a common longitudinal axis (44) defined through the housing (20) to drive fluid flow relative to the first, second and third pairs of fluid openings (203, 204; 206, 207; 209, 210), respectively. The first rotary pump (41) includes an input member (410) receptive of rotational drive energy for the first, second and third rotary pumps (41, 42, 43).