Modular Pump Power Unit with Cut-to-Length Shafts
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Solution Overview
Problem
Existing pump units require complex and numerous specially adapted components to accommodate different numbers of pump stages, leading to increased manufacturing complexity and warehousing needs.
Innovation Solution
A modular pump unit design where length-dependent components, such as shafts and tensioning straps, are manufactured in maximum length and cut to specific lengths as needed, eliminating the need for specialized axial end configurations and reducing the number of required parts by using non-positive and form-fitting connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pump units are designed with different numbers of pump stages to achieve desired output, then the pump unit can be adapted to different applications, but the number of individual parts that must be specially adapted increases
Solution Approach 1:
The patent applies universality by designing the shaft, clamping elements, and cable guides as standardized components that can be used across pump units with different numbers of stages. These universal parts eliminate the need for custom-manufactured components for each configuration, reducing part variety while maintaining adaptability.
Solution Approach 2:
The patent segments the pump unit into modular pump stages that can be stacked in different quantities. By making the individual stages interchangeable and using standardized connecting elements, the system achieves versatility through combination rather than through custom-designed components for each configuration.
2Adaptability or versatility
If components like shafts and tensioning straps are manufactured in different lengths to match the number of pump stages, then the pump unit can be assembled with varying stages, but the manufacturing complexity and warehousing needs increase
Solution Approach 1:
The shaft is designed as a universal component with standardized connection features (keyways, mounting holes) that remain functional regardless of length. This allows a single shaft design to be used across multiple pump configurations, eliminating the need to manufacture and warehouse shafts in every possible length.
Solution Approach 2:
The patent changes the parameter of component length without altering the fundamental design or connection features. By maintaining standardized connection geometries while varying only the length parameter, the system achieves adaptability without increasing manufacturing complexity or part variety.
3Adaptability or versatility
If specialized connection configurations are formed at the axial ends of components, then the components can be specifically adapted to the number of pump stages, but the number of individually adapted parts increases
Solution Approach 1:
The clamping elements are designed with universal connection features (threads, engagement profiles) that work with all pump stage configurations. This standardized connection design eliminates the need for custom connection geometries at axial ends, reducing part complexity while maintaining specific adaptability through standardized interfaces.
Data Source
Figure 1
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AI summary
The assembly comprising a pump (6) with a number of pump stages (10). A clamping element (12) e.g. tightening strap, and a cable rail (14), whose axial lengths depend on the number of pump stages, have no connection configuration on one of axial ends of the components, where the connection configuration is limited to the axial ends. The clamping element and the cable rail are connected to a connection element (20), which is coupled and/or connected to adjacent parts of the assembly, in a friction fit and/or positive fit manner. An independent claim is also included for a method for modular construction of a pump assembly.