Abstract: Abstract:The reasons of lubrication oil leakage in sealed position of bearing bush shell of the cooling fan, which is matched with the force draft fan and induced draft fan of boiler No.2 in Fulaerji Power Plant of Huadian Energy Company Limited, were analyzed. The structure of the bearing end cover of the cooling fan was improved. A jilt oil cone was added, and the axial gap of the jilt oil cone was adjusted. The problem of oil leakage of the cooling fan was solved thoroughly.

Key words: Keywords:boiler, cooling fan, sealing device, technical reformation, jilt oil cone, gap