Multi-part Rotor Assembly for Coolant Pumps
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Solution Overview
Problem
Existing rotor arrangements for coolant pumps face challenges in production efficiency, material optimization, and noise reduction, with complex multi-layer structures and separate injection molding processes leading to longer cooling times and potential imbalances.
Innovation Solution
A multi-part rotor arrangement where the drive part is constructed from separately injection-molded components, with a magnetic outer part and a non-magnetizable inner part, allowing for optimized material usage and reduced noise through a two-stage manufacturing process, enabling faster production cycles and improved stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drive part is constructed as a single complex multi-layer structure, then the structural integrity is maintained, but the cooling time during injection molding increases significantly
Solution Approach 1:
The drive part is divided into multiple separate injection-molded components (outer part, inner part, magnetic part) that are produced independently and then assembled. This segmentation allows each component to be manufactured with shorter cooling times while maintaining the overall structural integrity of the complete drive part assembly.
2Reliability
If expensive magnetic materials are used throughout the entire drive part, then the magnetic performance is optimized, but the manufacturing cost increases
Solution Approach 1:
Magnetic material is applied locally only to the specific regions within the drive part where magnetic functionality is required, rather than using expensive magnetic materials throughout the entire structure. This localized application optimizes magnetic performance while significantly reducing material costs.
3Device complexity
If the drive part is manufactured as a single large component, then the assembly is simplified, but the cooling time and potential imbalances increase
Solution Approach 1:
The drive part is segmented into multiple smaller components that are injection-molded separately. These smaller parts have significantly reduced cooling times during manufacturing. The components are then precisely assembled to form the complete drive part, simplifying the overall production process while maintaining assembly integrity.
4Ease of manufacture
If separate injection molding processes are used for different parts, then material optimization is achieved, but the number of manufacturing steps increases
Solution Approach 1:
Different parts of the drive part are manufactured through separate injection molding processes, allowing each component to be produced from the most suitable material for its specific function. This segmentation enables optimal material selection and cost optimization while the modular design facilitates efficient assembly of the complete drive part.
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 approach reduces cooling times, optimizes material usage, and results in a quieter operation with reduced manufacturing imbalances, enhancing the efficiency and accuracy of the coolant pump's rotor arrangement.
Implementation Method 1
the drive part for driving according to the electromotive principle has a magnetic substance and is magnetized at least in two poles
Data Source
Figure 1~2
Figure 3
Figure 4~5
AI summary
The invention relates to a rotor assembly (1) for rotatable installation in a pump housing of an electric pump for liquid media, in particular a coolant pump, comprising a drive part (3) and a pump part (2) non-rotatably connected to the drive part (3), wherein the pump part (2) has a flow area (29) arranged axially at an upper end of the rotor assembly (1) with an inlet opening (20) and several vanes (23) for conveying coolant, and wherein the drive part (3) comprises a magnetic substance for driving according to the electromotive principle and is magnetized at least two-pole. Manufacturing advantages are achieved by forming the drive part (3) in multiple parts, each separately injection-molded and interconnected.