Ouyang Yanqun Liu Xianliang is running normally. Handan Iron and Steel Energy Center 2*30,000 oxygen machine supporting MC01204 air compressor (design and manufacture of Shenyang Blower Group Co., Ltd.) started operation and commissioning in January 2011, the first two months of the test run air compressor vibration Some fluctuations, but basically within the allowable range, there is no vibration alarm or shutdown. In April 2011, the vibration of the air compressor began to change abnormally and the number of times became more and more interesting. The vibration value showed an increasing trend and exceeded the alarm even close to the chain shutdown value. The sudden change of vibration fluctuation is basically 24h. The change of the cycle value is 60|xm. Comparing the vibration value curve of each compressor and the gas inlet temperature value recorded by the computer of the control system, it is found that the abnormal vibration of the air compressor changes and the temperature of the suction port. The change is related to the change of the amplitude of the air compressor with the change of temperature. When the temperature rises, the amplitude also increases, and the amplitude of the air compressor decreases. During the temperature rise, the vibration of the air compressor will rise rapidly until it mutates to the alarm and chain shutdown value. Second, the analysis and diagnosis of the cause of the vibration anomaly phenomenon as follows and the final diagnosis of the exact cause. If the vibration probe of the instrument control is loose or other components are damaged, the data will be distorted and the vibration value will be abrupt. The air compressor of the 30,000 oxygen machine in the factory has the fault of the probe breakage and the line fault causing the vibration data to jump and stop. However, after repeated inspections of the test bed, it was found that the instrument control vibration element was abnormal. The use of this model is already the second in the factory. The first device has been running for nearly two years and the bed has experienced similar problems. After consulting the manufacturer's designers to calculate the relevant design, there is no problem in the design. The rotor is the core part of the air compressor. During the manufacturing process, there may be shape asymmetry, material unevenness, heat treatment deformation, processing and assembly errors, etc., and the unbalanced rotor imbalance may be eliminated after the manufacturer has to eliminate the factory. If the rotor dynamic balance changes after a period of time, the amplitude change of the unit is generally from small to large. From the comparison of the vibration history curve, the vibration mean value of the unit has increased, but its vibration value has been showing a kind of high and low fluctuations and the rotor imbalance is not consistent. The analysis of the rotor vibration spectrum also shows that the rotor does not appear. balance. The vibrations in the moving and static parts are mostly related to the improper installation or the temperature of the unit is too high, the parts are deformed, the parts are loose, etc. The vibrations are generally characterized by increased vibration and wide vibration frequency distribution. The range is 2~8 times the frequency and the frequency is started. Or when parking, you can cut the HMD1 on the spot to replace the open upper port and the field HMD1 replaces the open upper port and it is still valid. And according to the data curve recorded by WCC and the actual situation on the scene, there has never been a false switch. At the same time, it was found that the system also has the pre-alarm function of the finished product rack and the finished guide channel mechanical accident hidden danger.
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