Turn off the compressor inlet and outlet valves to decompress the compressor

Since there is no lubricating oil in the separator of the compressor unit, the unit does not operate manually, so the compressor must be processed before it can be restarted. Taking the shaft fault detection process of the compressor as an example to illustrate the application of wavelet analysis in compressor fault detection in natural gas transmission system. Mass production practices have shown that once the shaft shows the vibration signal, the machine's exhaust pressure fluctuates, and the next work capacity and time drops dramatically.

(1) No lubricating oil treatment in the separator: The loss of lubricating oil is mainly due to the fact that the lubricating oil enters the inlet line due to the tight sealing of the compressor inlet check valve after the compressor is stopped. The condensate was condensed at the low point of the system compression inlet line and no lubricant was found. When the auxiliary oil pump is started, the lubricating oil of the separator is displayed, but the upper mirror still has no oil level display. The compressor inlet and outlet valves are closed, the air source is cut off, the compressor unit is decompressed, and the lubricating oil is returned to the compressor separator.

(2) The compressor does not move manually. The compressor coupling is removed. The motor and compressor are manually cranked. The electric operation is flexible, but the compressor still has no action, indicating that the compressor may be locked and must be on the compressor. Disintegrate.

(3) Disassemble the compressor under the guidance of a professional technician of a company. After disintegration, no metal impurities were found in the compressor. The compressor rotor rotor journal was severely meshed with the sealing surface of the machine body, and the rotor and the casing were slightly scratched. There were two places in the casing due to metal accumulation in contact with the rotor. The compressor rotor rotor journal, the body sealing surface and the shell metal stack surface were repaired, and all the seal rings and bearings of the compressor were replaced, and the compressor was reloaded.

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