An air-cooling system for a horizontal vacuum high-pressure gas quenching furnace with alternate air flow up and down

Abstract

The invention discloses an air-cooling system for a horizontal vacuum high-pressure gas quenching furnace in which the air flow can be alternated up and down, adopts a left-right symmetrical structure of internal circulation with high space utilization rate, and is composed of a fan, an impeller, a volute, an air guide cover, Lifting frame, inner sealing plate, side sealing plate, air guide plate, heat exchanger, etc. Among them: the air deflector is connected with the heat exchanger, and is used to introduce the gas flowing out of the volute outlet into the heat exchanger, and the gas is blown to the workpiece along the inner partition of the heat exchanger; the lifting frame is installed on the air deflector and the inner seal. Between the plates, the gas flowing through the heat exchanger can be introduced into the air guide hood and into the impeller flow channel; the lifting frame is driven by the air cylinder to switch the wind direction by lifting and lowering. The air cooling system has a compact structure and high space utilization rate. The cooling form of alternating upper and lower cooling airflow helps to improve the cooling uniformity of the gas quenching process, thereby improving the uniformity of the workpiece structure and performance, and reducing the workpiece deformation.

Description

technical field [0001] The invention relates to an air-cooling system for a horizontal vacuum high-pressure gas quenching furnace, in particular to an air-cooling system for a horizontal vacuum high-pressure gas quenching furnace whose air flow can be alternated 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. It has the advantages of cleanness, no pollution, no need for subsequent cleaning, and easy adjustment of quenching strength. It is widely used in aerospace, military industry, automobile and other fields. [0003] At present, va...

AI Technical Summary

Problems solved by technology

In the case of multi-workpiece loading, the 360° jet cooling along the circumferential direction will easily cause the external workpiece to cool quickly and the internal workpiece to cool slowly; while the one-way jet cooling of the airflow will gradually slow down the cooling speed of the workpiece along the airflow direction

These two cooling methods are likely to lead to uneven structure and performance on both sides of a single workpiece and between different workpieces, and large deformation of the workpiece

In addition, in recent years, there has also been an up and down alternate air cooling method. Although the deformation of the workpiece and the uneven structure and performance of the workpiece have been effectively improved, the horizontal vacuum high-pressure gas quenching furnace adopts an external circulation air cooling system, and the equipment is integrated. Low density, large space occupation, high manufacturing cost and low energy efficiency

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