Buffering air pressure control system for bearing oil seal

Abstract

The invention provides a buffering air pressure control system for a bearing oil seal. The system comprises a buffering air cavity which is formed in the bearing oil seal, a sealing air guide pipeline which is communicated with the buffering air cavity, an assisting pipeline which is communicated with the sealing air guide pipeline, a self-powered type pressure regulating valve, a pressure transmitter, a stop valve for preventing buffering air in the assisting pipeline from reversely flowing, a pressure gage stop valve for controlling the buffering air to flow to a pressure gage, a pressure gage for displaying the pressure of the buffering air, a controller and audible and visual alarm, wherein the self-powered type pressure regulating valve and the pressure transmitter are sequentially arranged on the assisting pipeline and the self-powered type pressure regulating valve is used for stabilizing the pressure of buffering air in the assisting pipeline. With the adoption of the system, the pressure of the buffering air in a buffering air cavity can be stabilized; lubricating oil in the oil seal can be prevented from leaking to the air seal side or splashing irregularly; the buffering air system can run safely and stably; manual operation is avoided, so that the accidents caused by manmade factors can be reduced; meanwhile, human resources are decreased, and the production efficiency is increased.

Description

technical field [0001] The invention relates to the technical field of bearing oil seals for compressors, in particular to a buffer gas pressure control system 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 lubricatin...

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

Images