The leakage of the outer floating ring caused the sealing oil to break into the bearing box. In October 2004, the isomerized circulating hydrogen compressor was oiled by the bearing box of the driving end. The bearing box was filled with the oil sight glass and the oil return was large. The breathing valve of the non-drive end bearing housing does not appear to be oily, the interface of the bearing tank returning oil mirror is clear, and the oil returning is normal. Immediately carry out on-site inspection to confirm that the nitrogen seal pressure of the large fuel tank is 005 MPa. It can be concluded that the oil phenomenon of the breathing valve is not caused by the poor oil return due to the high pressure of the large fuel tank. From the analysis of the floating ring seal structure, if the outer ring of the floating ring seal becomes larger, the external oil return increases, causing the leak outside the seal to be filled back into the oil chamber, and the seal oil will break into the bearing case lubricating oil. According to the analysis, it can be concluded that the gap of the outer floating ring is large, which is the reason why the sealing oil is sucked into the bearing box, which causes the oil returning amount of the lubricating oil to increase the oil of the breathing valve. At the inspection site, it was found that the oil consumption was relatively small and the compressor bearing temperature was normal. Therefore, the author provided a storage space between the bearing housing and the breathing valve to provide a storage space to prevent leakage of lubricating oil. Through this measure, the problem of oiling is effectively solved, and the floating ring seal is replaced only when the compressor is running until the overhaul. Of course, if the outer floating ring gap is too large, the leakage is too large, and when the unit is threatened by normal operation, it must be shut down for maintenance. Sealing gas reference gas system failure and solution oil loss comparison began in February 2005, the compressor oil tank in the operation of the large oil tank oil level drop amount and the venting system condensate collection tank cut out the loss of oil does not match For details, see 3 comparisons. At the same time, it was found that the axial displacement parameters of the compressor also showed a gradual upward trend, and the specific trends were compared. In addition, it was found that the pressure drop of the system isomerization reactor also showed an upward trend, and the specific trend was compared. Conclusion According to the structural characteristics of the isolating cycle hydrogen centrifugal compressor floating ring seal, in order to make the sealing system safe and efficient operation, the relationship between the sealing oil, the sealing gas and the reference gas must be handled; from the sealing oil and the sealing air pressure difference, sealing The details of gas quality, installation and maintenance quality, etc., can ensure the safe, stable, long, full and excellent operation of the unit through long-term practice test. Electric Motorcycle,Best Electric Motorcycle,Electric Motorcycle For Kids,E Motorbike Wu Xi Mdka New Energy Technology Co., Ltd. , https://www.evmdka.com