The power equipment is turbine generator, reciprocating gas compressor, crude oil pump, screw air compressor, axial fan, etc. After one year of diagnosis and analysis, the vibration of these equipment is relatively stable, but some units are on the equipment. Auxiliary equipment such as fans, etc., often have vibrations that are too much to be repaired due to failure, and the failure of the cooling fan and oil cooling fan of the turbine generator will cause the entire generator set to be unable to operate, resulting in The production and life of the entire platform are in an unstable state. Therefore, the importance of these fans is self-evident.
The turbine generator cooling fan diagnosis turbine generator was put into operation in 1998. The single unit has two axial fans for cooling the generator. The fan installation form is a cantilever structure. The vibration detection point of each fan is on the wall of the fan. When we monitored the 2# cooling fan of GTG-8110A in January 2002, we found that the vibration has an accelerated upward trend, and the vibration spectrum shows that the vibration is prominent in the power frequency component. We believe that this phenomenon is caused by the poor dynamic balance of the fan impeller and the looseness of the bearing, causing the fan impeller to oscillate while rotating.
During the monitoring process of the fan, it is also found that there is an obvious vibration of the time domain waveform of the vibration, so that the vibration of the fan shows a fluctuating state, which aggravates the vibration of the fan. Since the frequency conversion of the generator is 25.0125 Hz, the frequency conversion of the fan is 24.5199 Hz, which is different from each other by 0.4926 Hz. The layout of the structure is relatively close, so that in the actual operation, a cycle of nearly 2 seconds is generated. If the power frequency is refined, it can be seen that two frequency peaks appear at 25 Hz.
Foldable Cooler Box,EPP packing Box,EPPCollapsible Cooler Box,EPP reefer
Taizhou Tianma Plastic Products Co. LTD , https://www.tianmaepp.com