Water lubrication deep-water passive dual-end-face stern shaft tube sealing device

Abstract

The invention relates to a water lubrication deep-water passive dual-end-face stern shaft tube sealing device, which comprises a shell connected with a boat body, and is characterized in that: an inner cavity and an outer cavity are formed in the shell along the axial direction; an end face sealing device is arranged in each cavity, so that two-stages of end face sealing devices are constructed; each end face sealing device comprises a static ring and a movable ring; a static sealing ring is arranged on the outer end face of each static ring; the inner end face of each static ring is hermetically connected with an end cover, and is configured together with a spring arranged on the end face of the end cover; each movable ring is fixedly connected with a stern shaft; a movable sealing ring arranged on the inner end face of each movable ring is configured together with the static sealing ring on the outer end face of the corresponding static ring; water inlets are formed in the inner and outer cavities respectively; and the water inlets of the inner and outer cavities are communicated with a cooling pressure water source respectively. In a normal state, one end face sealing pair of the inner cavity works; when an inner cavity seal fails, one end face sealing pair of the outer cavity takes effect by using the passive physical characteristic of pressure difference, so that the sealing performance of a stern shaft system and the running safety of a submersible vehicle are ensured fully under the condition of deep water.

Description

technical field [0001] The invention relates to a submersible shaft system sealing technology, in particular to a water-lubricated deep-water passive double-ended stern shaft tube sealing device, which can work in a relatively large depth and pressure range underwater to ensure sealing performance. Background technique [0002] The propulsion shafting of the submersible runs through the cabin and outside the cabin, and the stern tube sealing device is connected to the hull and the shafting to ensure the sealing performance of the shafting passing through the hull and prevent seawater from entering the cabin. At present, the water-lubricated stern tube sealing device of the propulsion shafting of the submersible is a single-end mechanical seal. When the shafting works at a large depth or under pressure conditions, its performance usually cannot meet the requirements, especially its safety cannot be guaranteed, which directly affects The depth at which the submersible dives un...

AI Technical Summary

Problems solved by technology

At present, the water-lubricated stern tube sealing device of the propulsion shafting of the submersible is a single-end mechanical seal. When the shafting works at a large depth o

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