Aluminum Alloy Rotor with Lanthanoid-Modified Shorting Ring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electromagnetic device rotors face challenges in achieving optimal castability, mechanical properties, and electrical conductivity due to limitations in the composition and processing of aluminum alloys used for conductor bars and shorting rings.
Innovation Solution
The development of an aluminum alloy with specific compositions, including silicon, iron, copper, zinc, and additives like manganese, magnesium, chromium, titanium, vanadium, and lanthanoids, which are used to form rotors with improved castability, mechanical integrity, and electrical conductivity through a controlled melting and casting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional aluminum alloys are used for rotor conductor bars and shorting rings, then manufacturing is simpler, but castability and mechanical properties are insufficient
Solution Approach 1:
The patent applies parameter changes by precisely controlling the chemical composition parameters of the aluminum alloy, including limiting silicon to 0.01-0.15 wt%, iron to 0.05-0.8 wt%, copper to 0.05-0.1 wt%, zinc to 0.01-0.05 wt%, and adding specific amounts of manganese, magnesium, chromium, titanium, and vanadium (each 0.001-0.04 wt%). This compositional parameter optimization resolves the contradiction by achieving superior mechanical properties through controlled alloying while maintaining manufacturability through a standardized casting process.
Solution Approach 2:
The patent employs composite materials by creating a multi-element aluminum alloy system that combines base aluminum with carefully selected alloying elements. The composite nature of this alloy, with its specific combination of silicons, transition metals, and rare earth elements, provides enhanced mechanical properties and electrical conductivity while improving castability, thus resolving the contradiction between strength and ease of manufacture.
2Strength
If aluminum alloy composition is optimized for mechanical strength, then rotor integrity improves, but electrical conductivity decreases
Solution Approach 1:
The patent resolves this contradiction through parameter changes by establishing an optimized compositional range that balances mechanical strength and electrical conductivity. The aluminum alloy contains silicon at 0.01-0.15 wt% and iron at 0.05-0.8 wt%, with trace amounts of copper (0.05-0.1 wt%), zinc (0.01-0.05 wt%), and additive elements (manganese, magnesium, chromium, titanium, vanadium at 0.001-0.04 wt% each). This precise parameter control ensures that strengthening elements are present in sufficient quantities to provide mechanical integrity while remaining low enough to preserve electrical conductivity for effective electromagnetic operation.
3Manufacturing precision
If casting temperature is increased to improve fluidity, then fillability improves, but hot tearing sensitivity increases
Solution Approach 1:
The patent applies parameter changes by optimizing the chemical composition to achieve the desired balance between fluidity and hot tearing resistance. The controlled content of silicon (0.01-0.15 wt%), iron (0.05-0.8 wt%), and the addition of specific elements like manganese, magnesium, chromium, titanium, and vanadium (0.001-0.04 wt% each) modify the alloy's solidification characteristics. This compositional parameter optimization enables the alloy to maintain good fluidity for complete cavity filling while reducing hot tearing sensitivity through improved solidification behavior and grain structure refinement.
Solution Approach 2:
The patent uses intermediary elements (manganese, magnesium, chromium, titanium, vanadium) as mediators to resolve the contradiction between fluidity and hot tearing sensitivity. These additive elements act as intermediaries that modify the solidification process, grain structure, and liquid film strength during casting, enabling the alloy to achieve both good fillability and reduced hot tearing without requiring extreme temperature increases.
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 rotors with enhanced castability, mechanical properties, and electrical conductivity, reducing hot tearing sensitivity and improving fluidity, while maintaining lightweight and high performance for electromagnetic devices.
Implementation Method 1
melting a first aluminum alloy at a temperature of from about 700° C. to about 750° C. to form a liquid melt
Implementation Method 2
cooling the aluminum alloy disposed within the conductor bar cavity to form an end of a conductor bar
Data Source
AI summary
A rotor includes a shorting ring defining a plurality of cavities therein, and a plurality of conductor bars each integral with the shorting ring and having an end disposed within a respective one of the plurality of cavities. The shorting ring and each of the conductor bars are formed from an aluminum alloy including a lanthanoid present in an amount of from about 0.1 part by weight to about 0.5 parts by weight based on 100 parts by weight of the aluminum alloy. An aluminum alloy, and a method of forming a rotor are also disclosed.