Air cooling system for improving cooling uniformity of vertical vacuum high-pressure air quenching equipment

Abstract

The invention discloses an air cooling system for improving the cooling uniformity of vertical vacuum high-pressure air quenching equipment. The air cooling system comprises a fan, an impeller, a volute, an air guide cover, a heat exchanger, an upper small heat shield, an air outlet channel, an air return channel, an air door I, an air door II, an upper sealing plate, a lower sealing plate, a lower small heat shield and the like. The wind guide cover is connected with the heat exchanger and is used for guiding cooling gas flowing through the heat exchanger into a volute inlet; and the air outlet channel is connected with a volute outlet and used for leading out air flowing out of the volute. The air door I is arranged in the air outlet channel and is driven by an air cylinder, so that theair inlet direction can be switched; the air door II is installed in the air return channel and driven by the air cylinder, and the switching of the air return direction can be achieved. The air cooling system can achieve up-and-down alternate air spraying cooling of the cooling airflow to a workpiece, the temperature difference between two ends of the workpiece can be greatly reduced, then the uniformity of the structure and performance of the workpiece is improved, and the workpiece deformation is reduced.

Description

technical field [0001] The invention relates to a vertical vacuum high-pressure gas quenching equipment, in particular to an air-cooling system for improving the cooling uniformity of the vertical vacuum high-pressure gas quenching equipment, which can realize the alternate cooling of airflow up and down. Background technique [0002] Heat treatment is a process technology that gives or improves the service performance of the workpiece by changing the microstructure inside the workpiece, or changing the chemical composition of the workpiece surface, and fully exploits the potential of the material. Vacuum high-pressure gas quenching is a heat treatment technology developed in recent years. It uses inert gases such as high-purity nitrogen or argon as the quenching cooling medium. Advantages, it is widely used in the processing of workpieces with relatively small length and diameter in aerospace, military, automobile and other fields, and has achieved good results. [0003] H...

AI Technical Summary

Problems solved by technology

During the cooling process, due to the different cooling rates at both ends of the workpiece, there is a temperature difference between the two ends of the workpiece, resulting in uneven structure and properties of the workpiece and deformation of the workpiece

The temperature difference has little effect on workpieces with small long-diameter ratio, but it has a significant impact on workpieces with large long-diameter ratio, resulting in uneven structure and performance at both ends of the workpiece, and it is difficult to control heat treatment deformation.

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