To provide a shaft sealing device of a marine contra-rotating propeller apparatus, which can reduce the required number of air supply devices and can discriminate an abnormal part of a seal from discharged drainage.SOLUTION: A shaft sealing device 50 comprises a stern tube seal 52 on the stern side, a contra-rotating seal 54 on the stern side, a single air supply device 56, a stern tube drainage recovery device 58, and a contra-rotating drainage recovery device 60. The single air supply device 56 supplies sealing air A to the stern tube seal 52 on the stern side and to the contra-rotating seal 54 on the stern side via the stern tube seal. The stern tube drainage recovery device 58 independently recovers front section drainage D1 discharged from the stern tube seal 52 on the stern side. The contra-rotating drainage recovery device 60 recovers rear section drainage D2 discharged from the contra-rotating seal 54 on the stern side, separately from the front section drainage D1.SELECTED DRAWING: Figure 4
【課題】エア供給装置の必要数を低減することができ、かつ排出されたドレンからシールの異常箇所を判別できる舶用二重反転プロペラ装置の軸封装置を提供する。【解決手段】軸封装置50が、船尾側の船尾管シール52、船尾側の二重反転シール54、単一のエア供給装置56、船尾管ドレン回収装置58、及び二重反転ドレン回収装置60を備える。単一のエア供給装置56は、船尾側の船尾管シール52と、これを経由して船尾側の二重反転シール54とにシールエアAを供給する。船尾管ドレン回収装置58は、船尾側の船尾管シール52から排出された前部ドレンD1を単独に回収する。二重反転ドレン回収装置60は、船尾側の二重反転シール54から排出された後部ドレンD2を前部ドレンD1と分離して回収する。【選択図】図4
SHAFT SEALING DEVICE OF MARINE CONTRA-ROTATING PROPELLER APPARATUS
舶用二重反転プロペラ装置の軸封装置
2019-06-20
Patent
Electronic Resource
Japanese
SHAFT SEALING DEVICE FOR MARINE CONTRA-ROTATING PROPELLER DEVICE
European Patent Office | 2021
|SHAFT SEALING DEVICE FOR MARINE CONTRA-ROTATING PROPELLER DEVICE
European Patent Office | 2019
|Contra-rotating sealing assembly and contra-rotating propeller adopting same
European Patent Office | 2021
|Rotol contra-rotating propeller
Engineering Index Backfile | 1942
|