Electronic Pump Rotor Vibration Reduction via Partition Sunken Portion
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Solution Overview
Problem
External-rotor-type electronic pumps experience serious vibration issues due to the short length of the rotor part's cooperation portion, affecting performance and service life.
Innovation Solution
A sunken portion is integrated into the partition to accommodate the rotor part, increasing its length without raising the pump's total height, enhancing dynamic balance and reducing vibration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotor part's cooperation portion length is increased to reduce vibration, then the dynamic balance and service life are improved, but the total height of the pump increases
Solution Approach 1:
The partition structure is modified by adding a sunken portion that extends in the axial direction, creating a localized dimensional change. This allows the rotor cooperation portion to be accommodated within the sunken region, increasing its effective length without increasing the overall pump height. The sunken portion acts as a localized structural modification that provides additional space for the rotor mounting while maintaining the compact external dimensions of the pump.
2Stability of the object's composition
If the rotor part's cooperation portion length is increased to reduce vibration, then the dynamic balance is improved, but the structural complexity increases
Solution Approach 1:
The sunken portion is integrated directly into the partition structure, merging the vibration-reduction feature with the existing housing component. Rather than adding a separate auxiliary structure, the solution modifies the partition itself to include the sunken region, thereby reducing structural complexity. The partition serves dual functions: separating the motor and pump chambers while also providing the sunken portion for rotor accommodation.
Solution Approach 2:
The partition structure is designed to perform multiple functions: it separates the motor chamber from the pump chamber, provides structural support, and incorporates the sunken portion to accommodate the rotor cooperation portion. This multi-functional design eliminates the need for additional dedicated components, thereby reducing overall structural complexity while achieving the vibration reduction goal.
3Temperature
If external-rotor-type configuration is used for heat dissipation, then heat dissipation performance is improved, but vibration increases due to short rotor cooperation portion
Solution Approach 1:
The sunken portion creates a localized axial dimension change in the partition, providing additional space for the rotor cooperation portion without increasing the radial or overall axial dimensions of the pump. This allows the external-rotor configuration to maintain its heat dissipation advantages while the extended cooperation portion length reduces vibration through improved dynamic balance.
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 design improves the operating performance and service life of the electronic pump by stabilizing the rotor part during operation, reducing vibrations, and maintaining the pump's compact height.
Implementation Method 1
A stator part and a rotor part of the electronic pump are completely separated by a partition... The electronic pump includes a disk-type electronic pump, an internal-rotor-type electronic pump and an external-rotor-type electronic pump
Data Source
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AI summary
An electronic pump includes a second housing, a rotor part, a stator part and a circuit board. A pump chamber is separated by a partition into a wet chamber allowing a working medium to pass through and at least one dry chamber where there is no working medium passing through, and the rotor part is arranged in the wet chamber. The electronic pump further includes a shaft, a sunken portion is formed at a top portion of the partition, and the shaft and a bottom of the sunken portion are fixed by injection molding. A portion where the rotor part is in contact with the shaft is a cooperation portion of the rotor part, and the cooperation portion is arranged in a cavity of the sunken portion.