Underwater sealing system, tidal power generation set applying same and applying method

Abstract

The invention discloses an underwater sealing system, a tidal power generation set applying the same and an applying method. The underwater sealing system is used for connectively sealing an underwater non-revolving member and an underwater revolving member and comprises revolving sealing parts and sealing bodies, wherein the revolving sealing parts sleeve on the revolving member. The sealing bodies form different cavities on two sides of the revolving sealing parts, and the cavities except the cavities close to the non-revolving member are water cavities, and hermetical connection among the revolving sealing parts is reinforced by pressure difference between the cavities on two sides. The underwater sealing system is safe, reliable, less prone to wearing, long in service life and good in sealing property. The tidal power generation set applying the underwater sealing system can effectively seal a spindle and a cabin of an under-seawater tidal energy generation set in a long run. Furthermore, sealing states can be transmitted to an offshore monitoring center through pressure sensors, sealing conditions of the underwater generation set can be monitored in real time, and early warning and timely maintenance can be realized.

Description

technical field [0001] The invention relates to the technical field of sealing, in particular to an underwater sealing system, a tidal energy generating set using the same and an application method. Background technique [0002] With the deepening of ocean development activities, tidal power generation technology has been widely used. Among them, the sealing of the tidal energy generating set is a key problem to be solved, especially the dynamic seal between the rotating shaft of the tidal energy generating set and the engine room, the performance of which directly affects whether the tidal energy generating set can work normally, or even It directly affects the safety and life of the unit. [0003] At present, tidal energy generating units are generally arranged at a water depth of 20 meters to 30 meters below sea level, and the dynamic sealing method between the main shaft of the unit and the engine room mostly adopts a mechanical sealing structure, which uses springs to ...

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Problems solved by technology

[0003] At present, tidal energy generating units are generally arranged at a water depth of 20 meters to 30 meters below sea level, and the dynamic sealing method between the main shaft of the unit and the engine room mostly adopts a mechanical sealing structure, which uses springs to supplement the elastic force, balance the pressure of seawater, and seal The sealing part is tightly fixed on the groove end face of the inner sealing ring to prevent the axial displacement of the sealing part, so as to ensure the sealing effect of the sealing structure, but this sealing structure has the following disadvantages: (1) wears quickly, and the sealing ring (2) The media on both sides of the sealing ring are seawater and lubricating oil, and seawater can easily dilute the lubricating oil film formed on the lip of the sealing ring, resulting in dry friction of the sealing ring, resulting in poor sealing performance; (3) This kind of sealing structure cannot provide condition monitoring, and cannot know in real time whether the main shaft seal of the tidal energy generating set is intact

[0004] This shows, above-mentioned existing tidal energy generating set main shaft and the engine room sealing mode, obviously still have inconvenience and defective, and urgently need to be further improved

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