Pump Fan Hub Cooling and Modular Stage Design
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Solution Overview
Problem
Existing pumps for swimming pools and spas face challenges in cooling motor shaft bearings and managing complex multi-stage designs, leading to noise and increased difficulty in service and repair due to recirculating air and numerous parts.
Innovation Solution
The design incorporates a fan that draws ambient air near its axis to cool motor shaft bearings, reducing noise by combining air flows, and modular stages that simplify maintenance by reducing the number of components to manage during service.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If a multi-stage pump design is used to generate high water pressure, then the water pressure output is improved, but the number of parts and device complexity increases making service and repair more difficult
Solution Approach 1:
The pump is divided into modular stages, where each stage is a self-contained unit that can be independently serviced. This segmentation allows the complex multi-stage pump to be maintained by working on individual modules rather than disassembling the entire pump, thus resolving the contradiction between achieving high pressure through multiple stages and maintaining ease of service with reduced part complexity.
2Temperature
If conventional fan design is used, then the structure is simple, but the motor shaft bearing cooling is insufficient and noise increases due to air recirculation
Solution Approach 1:
The fan design introduces a secondary air flow dimension by drawing ambient air through the fan hub area, creating a three-dimensional cooling pattern rather than simple radial flow. This dimensional enhancement improves bearing cooling efficiency and prevents air recirculation that causes noise, resolving the contradiction between thermal management and noise reduction.
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 solution effectively cools motor shaft bearings, reduces noise by minimizing turbulent airflow, and simplifies maintenance by reducing the number of parts to manage in multi-stage pumps, enhancing operational efficiency and serviceability.
Implementation Method 1
a fan configured to draw ambient air through a hub of the fan so as to cool the motor shaft bearing
Implementation Method 2
This air is then pushed out radially between the fan plate and motor end cap and converges with the primary fan air
Data Source
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AI summary
Pump designs are detailed. A pump may include a fan having one or more pass-through holes allowing ambient air to be drawn through a fan near a motor shaft bearing for cooling purposes. Alternatively or additionally, a pump may include modular stages to facilitate servicing and repair.