The Combination Of Sealing Technology In The Application Of Catalytic Pressure Unit Shaft Seal System And Explore

This paper mainly describes the domestic reconstruction of the shaft end seal for the high-speed centrifugal compressor of the heavy oil catalytic cracking unit. By means of discussion and analysis of the theory of the mechanical-floating ring combines seal for the high-speed centrifugal compressor shaft end seal, it is demonstrated the feasibilities for the reconstruction of the rich gas compressor shaft end seal. The reconstruction is put into operation.The main types of shaft end seals for the high-speed centrifugal compressor are introduced briefly. The application conditions for the mechanical seal and the floating ring seal in the high-speed centrifugal compressor are separately & intensively analyzed. The technology for the mechanical-floating ring combined seal is proposed. It integrates the virtues of the two seals and adapts to the high-speed centrifugal compressor more than any other. The construction and application demand is introduced in detail.The problem of the original imported shaft end seal is analyzed and the cause of the failure of the seal oil protection system of the shaft end seal is pointed out. By calculation -the main design parameters are obtained & the original shaft end seal disfigurement is reconstructed - one by one. The cubage for the seal oil protection system gas storage vessel is increased, which gives the gas storage vessel more time to protect the system. It is proved that the shaft end seal and the seal oil protection system after being reconstructed met the application demand and ensured the normal running of the compressor assembly - bringing with it outstanding economic and social efficiency.A developing trend for the high-speed centrifugal compressor is predicted. The non-oil seal will gradually take the place of the wet seal and it will obtain zero leakage of the seal unit.