Suspended Lifting Device for Diversion Cylinder Positioning
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Solution Overview
Problem
In Czochralski single crystal silicon production, the existing diversion cylinder structures face issues with accurate positioning and controlled distance due to high-temperature exposure and oxidation, leading to reduced service life and impaired crystal formation.
Innovation Solution
A suspended lifting device for the diversion cylinder, comprising a lifting beam connected to a water-cooling cross arm with a U-shaped groove for the lifting bolt, a positioning plate to control the angle, and a projection to prevent the bolt from falling, allowing for precise adjustment and reduced horizontal deviation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diversion cylinder is fixed in position, then the structure is simple and easy to operate, but the lower end ages and oxidizes causing inaccurate positioning and reduced service life
Solution Approach 1:
The diversion cylinder is equipped with a lifting device that enables it to move vertically along the furnace axis. This dynamic positioning capability allows the cylinder to be adjusted to optimal positions during different stages of crystal growth, preventing the lower end from remaining in the high-temperature zone for extended periods, thereby reducing oxidation and aging while maintaining accurate positioning control.
2Productivity
If the diversion cylinder remains in the high-temperature region, then the crystal growth process is maintained, but the lower surface ages and oxidizes affecting crystal formation
Solution Approach 1:
The lifting device enables periodic adjustment of the diversion cylinder position during crystal growth. The cylinder can be moved up and down in controlled intervals, allowing the lower end to periodically exit the high-temperature zone for oxidation prevention while maintaining overall crystal growth continuity. This periodic positioning adjustment resolves the conflict between maintaining growth conditions and preventing thermal degradation.
3Manufacturing precision
If manual overgrinding is performed frequently, then the diversion cylinder surface is maintained, but service life is shortened due to repeated high-temperature exposure
Solution Approach 1:
By making the diversion cylinder dynamically adjustable rather than fixed, the lifting device allows the cylinder to be positioned optimally during operation. This reduces the frequency and intensity of manual overgrinding needed to maintain surface quality, as the lower end can be periodically removed from the high-temperature zone, thereby extending service life while maintaining manufacturing precision.
Data Source
AI summary
A suspended lifting device for diversion cylinder is provided, wherein the suspended lifting device includes a lifting beam connected to a surface of a water-cooling cross arm. A groove is provided on the lifting beam, and the groove is configured to receive a lifting bolt. A positioning plate is disposed on a bottom side of the lifting beam close to the water-cooling cross arm, and the positioning plate is configured to control an angle between the lifting beam and the water-cooling cross arm.