Integrated Motor Magnetic Drive Pump Assembly
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Solution Overview
Problem
Conventional magnetic drive pumps for liquid cooling systems are bulky, expensive, and not suitable for small spaces due to the need for separate motors and multiple seals, which limits their efficiency and reliability in cooling applications.
Innovation Solution
A compact, magnetic drive, centrifugal pump assembly with an integrated motor and overmolded stator assembly that eliminates external drive magnets, reduces material costs, and provides a liquid-tight seal, enhancing thermal management and handling of aggressive media.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If conventional magnetic drive pumps use separate motors and drive magnets, then the pump can achieve magnetic drive functionality, but the pump becomes bulky and unsuitable for small spaces
Solution Approach 1:
The patent combines the motor assembly and pump housing into a single integrated unit. The motor housing serves dual purposes as both the motor enclosure and the pump housing, eliminating the need for separate motor and pump components. This merging reduces the overall volume and makes the pump suitable for small spaces while maintaining magnetic drive functionality.
Solution Approach 2:
The motor housing performs multiple functions: it encloses the motor components, serves as the pump housing, provides magnetic sealing through the overmold, and acts as the structural container for the entire magnetic drive pump assembly. This multi-functionality eliminates the need for separate components, reducing overall size and complexity.
2Reliability
If conventional magnetic drive pumps use multiple seals, then the pump can prevent fluid leakage, but the pump becomes more expensive and less reliable
Solution Approach 1:
The patent extracts and eliminates traditional mechanical seals from the pump design. Instead of using multiple separate seal components, the invention employs magnetic sealing where the overmolded stator assembly creates a magnetic barrier that prevents fluid leakage without requiring physical contact seals. This extraction of traditional sealing mechanisms reduces complexity and improves reliability.
Solution Approach 2:
The patent replaces mechanical sealing systems with a magnetic sealing system. The overmolded stator assembly generates a magnetic field that acts as a seal, preventing fluid leakage without the need for mechanical contact between moving and stationary parts. This substitution eliminates wear and failure associated with mechanical seals while maintaining effective sealing.
3Power
If conventional magnetic drive pumps use separate motors, then the pump can achieve adequate pumping performance, but the pump consumes more power and generates more heat
Solution Approach 1:
The integration of the motor and pump into a single assembly with shared housing and magnetic coupling reduces energy losses. The direct magnetic drive mechanism eliminates the need for intermediate transmission components, reducing mechanical losses and improving overall energy efficiency while maintaining adequate pumping 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
The solution results in a more efficient, reliable, and cost-effective pump that can handle aggressive media, with improved thermal management and reduced power consumption, capable of operating at higher voltages and faster speeds, making it suitable for small electronics cooling applications.
Implementation Method 1
a motor assembly with a rotor assembly and a stator assembly
Implementation Method 2
an overmold substantially covering the stator assembly and an inside portion of the first pump housing
Data Source
AI summary
Embodiments of the invention provide a pump assembly and a method for assembly the pump assembly. The pump assembly includes a stator assembly, a lower pump housing, an upper pump housing, a rotor assembly, and an isolation cup. The method includes coupling the stator assembly to the lower pump housing, overmolding an overmold material over the stator assembly and the lower pump housing, positioning the isolation cup over the overmold, and positioning the rotor assembly inside the isolation cup. The method further includes placing the upper pump housing over the rotor assembly and coupling the upper pump housing to the lower pump housing.