Buffer gas pressure control method for bearing oil seal

Abstract

The invention provides a buffer gas pressure control method for bearing oil seal, which comprises that the buffer gas entering the auxiliary pipeline from the buffer gas source sequentially passes through a self-operated pressure regulating valve, a pressure transmitter, a check valve and a pressure gauge, and then is guided through a seal. The air pipeline enters the first buffer air chamber and the second buffer air chamber, and applies pressure to the bearing oil seal of the high-speed rotor fan side of the compressor and the bearing oil seal of the low-speed rotor motor side of the compressor respectively; the self-operated pressure adjustment valve is used to adjust the pressure The buffer gas pressure behind the valve; the controller receives the buffer gas pressure signal sent by the pressure transmitter, compares the buffer gas pressure value signal with the preset value, and controls the start of the compressor or the sound and light alarm to send out according to the comparison result Call the police. The buffer gas pressure control method of the bearing oil seal provided by the present invention can stabilize the buffer gas pressure in the buffer gas cavity, prevent the lubricating oil in the oil seal from leaking or splashing irregularly to the gas seal side, and ensure the safe and stable operation of the buffer gas system .

Description

technical field [0001] The invention relates to the technical field of bearing oil seals of compressors, in particular to a buffer gas pressure control method for bearing oil seals. Background technique [0002] SVK series compressors are gear speed-increasing centrifugal compressors, which are widely used in petroleum, chemical, air separation, pharmaceutical and other fields. During the operation of the SVK centrifugal compressor, the rotor parts rotate at high speed, and the rotor bearings must be fully lubricated and cooled. Therefore, a lubricating oil station is required to provide lubricating oil for the bearings. However, many industries require that the medium compressed by the compressor must be absolutely oil-free. Therefore, the oil seal on the bearing side usually adopts a labyrinth oil seal. The oil seal is equipped with a buffer air chamber, and the buffer air source is introduced from the outside through the pipeline to inflate the air. , prevent lubricating...

AI Technical Summary

Problems solved by technology

[0003] Since the pressure of the buffer air source fluctuates during actual use, if the pressure of the buffer air source is too low, the pressure of the buffer air entering the buffer air chamber is too low, which will easily cause lubricating oil to escape into the medium compressed by the compressor. Pollution; if the pressure of the buffer air source is too high, the pressure of the buffer air entering the buffer air chamber will be too high, which will easily cause irregular splashing of lubricating oil, and the lubricating oil will be brought into the air seal side, which will still cause the compressed medium to be polluted

This requires constant staff to check the pressure value of the buffer gas on site. When the pressure of the buffer gas source drops or rises, the pressure of the buffer gas is guaranteed to be stable through manual adjustment, resulting in a waste of human resources, and if it cannot be adjusted in time There is also the problem of contaminating the compressed media

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