Adjustable Gas Supply Nozzles for Directional Solidification Cooling
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Solution Overview
Problem
Existing casting devices face challenges in achieving high cooling performance during directional solidification, which is crucial for suppressing creep deformation and improving fatigue strength in components like turbine blades, as they struggle to maintain a consistent temperature gradient and prevent casting defects.
Innovation Solution
The casting device incorporates adjustable gas supply nozzles that blow cooling gas to the mold, ensuring a constant or adjustable distance from the nozzle discharge ends to the mold, combined with a radiation cooling portion, to enhance cooling performance and maintain a high temperature gradient during directional solidification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If cooling gas is blown to the mold in the cooling chamber to accelerate solidification, then cooling performance is improved, but stability of cooling performance deteriorates due to mold movement
Solution Approach 1:
The gas supply nozzle is made movable to dynamically adjust its position in response to mold movement. The nozzle includes a movable portion that can change its position relative to the mold, allowing the discharge end to maintain a constant distance from the mold surface despite the mold's movement through the cooling chamber. This dynamic adjustment resolves the contradiction by preserving both high cooling performance and its stability.
Solution Approach 2:
The system incorporates feedback control where the position of the gas supply nozzle is adjusted based on the position of the mold. The movable portion of the nozzle responds to mold movement, creating a feedback mechanism that maintains optimal cooling conditions throughout the solidification process, thereby ensuring stable cooling performance.
2Manufacturing precision
If the mold is moved from the heating chamber to the cooling chamber at a slow speed to maintain temperature gradient, then directional solidification is achieved, but productivity decreases
Solution Approach 1:
The gas supply nozzle's movable portion enables dynamic adjustment of the cooling gas discharge position to match the mold's movement. This allows the mold to be moved at a controlled slow speed for quality directional solidification while the nozzle continuously adapts its position, preventing productivity loss by optimizing the cooling process efficiency.
Solution Approach 2:
The system changes the position parameter of the gas supply nozzle dynamically during the molding process. By adjusting the nozzle position in response to mold movement, the system maintains optimal cooling parameters throughout the slow-speed transfer, ensuring both directional solidification quality and reasonable production efficiency.
3Device complexity
If the distance between gas supply nozzle and mold is not adjusted, then device complexity is reduced, but cooling performance becomes unstable
Solution Approach 1:
The gas supply nozzle incorporates a movable portion that adds dynamic capability to the system. This movable component allows the nozzle to adjust its position automatically, providing the flexibility needed to maintain stable cooling performance without requiring complex external control systems or multiple separate components.
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 configuration stabilizes high cooling performance, improves solidification speed, and reduces casting defects, resulting in increased mechanical strength and reduced manufacturing costs by optimizing the cooling mechanism for molds of varying dimensions.
Implementation Method 1
cooling gas containing inert gas is blown to the mold in the cooling chamber
Implementation Method 2
cooling gas containing inert gas is blown to the mold in the cooling chamber
Implementation Method 3
radiation cooling portion configured to cool the mold by radiation
Implementation Method 4
directional solidification is effected while the mold poured with the molten metal is moved
Implementation Method 5
make the crystal structure columnar crystalline or single crystalline
Data Source
AI summary
In a casting device, positions of discharge ends discharging cooling gas, of respective gas supply nozzles are adjusted in response to movement of a mold. This makes it possible to stably achieve high cooling performance for the mold by blowing of the cooling gas. To adjust the positions of the respective discharge ends, the gas supply nozzles are advanced or retreated, or are expanded or contracted. Further, a cooling chamber may include a radiation cooling portion that cools the mold by radiation, and the radiation cooling portion is disposed below the gas supply nozzles that are provided directly below a heat shielding body partitioning a heating chamber and the cooling chamber.