Field, vibration analysis and fault diagnosis of 15-type centrifugal air compressor Yu Zhiling China Petrochemical Maoming Branch, Guangdong Maoming has a slight decline, and then gradually rises, the vibration rises in the daytime, the history of the vibration data analysis and diagnosis, accurate The cause of the equipment failure was judged and reasonable suggestions were made. 1 Introduction Air compressor installation uses popularity as a gas source to provide qualified industrial wind and instrument wind for the entire ethylene plant. Industrial wind is compressed air, used for purging and pressing in chemical production; The dew point of the compressed air after drying is 40 under normal pressure. In the following frost-free chemical production, the gas source used as a pneumatic instrument is used for pressure detection or partial blowing. The raw material air is sucked by the suction tower, and the mechanical impurities are removed through the filter. The compressor is compressed. The air is sucked by the suction pipe. The inlet guide vanes enter the compressor stage for compression. The pressure rises to 0083. After the interstage cooler cools, it enters the lower stage compression step by step. Finally, the pressure is after the final stage cooler. The temperature of 75 is 48. At this time, the compressed air can be divided into roads. The road is vented through the outlet venting valve 顺01 at the time of opening and stopping, and the road passes through the anti-surge valve 103 as a pressure adjustment when venting or a fault state when the parking state is vented, the last road The outlet check valve stomach 1 and the outlet electric valve 102 are sent to the process air storage tank. Fixed speed 1487 颔 fixed power 16 broken low speed shaft speed 556617 beer high speed shaft speed 8810 compressor shaft vibration alarm 62 vibration interlocking 82 unit structure and vibration measuring point distribution 1. 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Centrifugal force is related, that is, =å¿’ It is well known that the cyclical change in the direction of the alternating force causes vibration, which is the reason why the vibration is not ten. The main feature of the rotor imbalance fault is that the vibration time domain waveform is approximately sinusoidal, the spectrum energy is concentrated on the fundamental frequency higher harmonics, and the rotor axis trajectory is elliptical. Unbalanced to the original. At the beginning of the operation hall, the vibration of the unit is at a high level of 5, and the vibration of the unit is unbalanced. At the beginning of the operation, the vibration of the unit is low, and it rises with time, and then stabilizes at a higher level. 3 Inspection and repair situation can be judged according to the above analysis. 4 The vibration of the machine is increased. The reason for the unbalance on page 33 is that the unevenness of the rotor of the low-shaft rotor is uneven, resulting in a gradual imbalance of the rotor. It is recommended to check the fouling of the low speed shaft impeller of the unit. According to the diagnostic report, the low-speed shaft rotor of the unit was inspected and found that the stage impeller was quite clean, while the stage impeller was very fouled. Almost every impeller flow path was attached with a thick and uneven mud. Progressive judgment may be that there is leakage between the interstage coolers, and the stage cooler is taken out and found to be leaking and severely corroded. The rotor impeller was cleaned and the dynamic balance test was repeated. The leaking cooling water pipe was replaced. After the unit was driven, the vibration condition was tracked and monitored. It was found that the unit operated smoothly and the vibration amplitude of the unit was significantly lower than that before parking. At present, the unit is in good working condition and the vibration amplitude trend IIi Sheng Zhaoshun. Equipment state benefit measurement and fault breaking technology application Beijing Chemical Industry Press. 2003172I 2 Sheng Zhaoshun. To test and terminate; internal interrupt technology and application. Beijing Chemical Industry Press. 200313137 state monitoring and fault diagnosis work, the communication address 5250 was reported to the Ministry of Chemical Industry of Maoming Branch of Sinopec, Maoming City, Guangdong Province. Fluid engineering and separation equipment, communication address 230024, Wangjiang East Road, Hefei, Anhui, China
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