Centrifugal compressor oil seal airtight device

A centrifugal compressor oil seal airtight device comprises an oil seal airtight device body, the oil seal airtight device body is composed of an installation base and an output pipeline connected with the installation base, the interior of the installation base is hollow, a cavity used for containing an oil seal is formed, and an installation through hole used for containing a bearing is formed in the center of the installation base. The outer side wall of the bearing is attached to the inner side wall of the oil seal, one end of the bearing is exposed out of the mounting seat, the other end of the bearing is provided with a blade, the mounting seat is provided with a gas conveying hole directly communicated with the oil seal, and the gas conveying hole is connected with an output pipeline. By using the pressure gauge, the flow meter, the adjusting ball, the flange valve, the Hall sensor and other components, when gas is introduced into the oil seal in the using process of the device, the flange valve can be