Magnet-Coupled Gear Pump Support Structure for Axial Alignment
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Solution Overview
Problem
Existing pumps face issues with increased parts count due to separate motor and pump areas, and axial load misalignment causes friction and performance degradation, especially at high pressures.
Innovation Solution
A pump design that integrates an external gear with a magnet, support, and bearing to align the axial center, using a support and bearing to stabilize the external gear and prevent misalignment, and includes a can to separate fluid regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the motor area and pump area are separated inside the pump, then the functional separation is achieved, but the number of parts and overall product size increases
Solution Approach 1:
The patent combines the motor area and pump area into a single integrated housing structure. The stator assembly (motor) and gear assembly (pump) are positioned within the same housing, eliminating the need for separate motor housing and pump housing. This merging reduces the total number of parts while maintaining functional separation through internal spatial arrangement.
2Stress or pressure
If high pressure is generated in the pump, then the pumping capability is improved, but friction with the housing occurs due to axial misalignment of the external rotor
Solution Approach 1:
The patent introduces a support structure as an intermediary element between the external rotor and the housing. This support includes a support plate with support protrusions that contact the housing, providing axial positioning and load support for the external rotor. The intermediary support structure distributes the axial load and prevents direct contact between the misaligned rotor and housing, thereby reducing friction while maintaining high pressure capability.
3Device complexity
If the axial load on the external rotor is not supported, then the structure is simpler, but the rotational stability of the rotor is degraded
Solution Approach 1:
The support structure acts as an intermediary that provides axial load support to the external rotor. The support plate with support protrusions contacts the housing and provides reaction forces to balance the axial load on the external rotor. This intermediary support maintains rotational stability without requiring complex bearing arrangements, achieving a balance between structural simplicity and rotational stability.
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 design stabilizes the axial system, reduces friction, and enhances driving efficiency, allowing higher outlet pressures and reduced current consumption.
Implementation Method 1
a magnet that is coupled to the external gear
Data Source
AI summary
A pump comprises: an external gear, a magnet coupled to the external gear; an internal gear disposed inside the external gear; a support having a portion disposed between the external gear and the magnet; and a bearing coupled to the support, wherein the support includes a protruding part coupled to the inner surface of the bearing.