Environmental medium pressure adaptive sealing-packing pressing device

Abstract

Disclosed is an environmental medium pressure adaptive sealing-packing pressing device. The environmental medium pressure adaptive sealing-packing pressing device comprises a packing case, a stepped through hole is formed in the packing case, a rotating shaft penetrates the stepped through hole to form a filling cavity with the stepped through hole, and the filling cavity is filled with the sealing packing; a pressing disk is mounted on the inner side of the packing case, a flange matched with the filling cavity is arranged in the end face of the inner side of a central through hole of the pressing disk, fixing guide bars are mounted on the outer periphery of the stepped through hole and are connected with the pressing disk, axial expansion sacs are mounted on lateral faces of the pressing disk, and the axial expansion sacs are communicated with an external pressure medium via a booster through a pipeline. Pressure of the environmental medium is taken as a power source, energy sources are saved, and the pressing device is green and environment friendly and suitable for low-energy consumption during long voltage; meanwhile, sealing property and normal operation of the sealing packing are guaranteed; pressing force quickly changes with the environment pressure, and fast response is good; a stop valve is arranged at an easy-to-operate position, personnel burden is alleviated, and safety is good.

Description

technical field [0001] The invention belongs to the technical field of ship sealing design, and in particular relates to a sealing packing compacting device adaptive to the pressure of the environment medium. Background technique [0002] Packing seal is a commonly used sealing method in marine products. It is often used to seal the transmission shaft passing through the pressure hull of the hull, such as the stern shaft, the tongue valve transmission rod, etc., to prevent seawater from entering the cabin. [0003] The packing seal relies on external force to compress the packing to achieve the sealing of the sealing part. Traditionally, this external force is generally realized by people tightening bolts, etc., which has the following disadvantages: 1) Human strength is limited, and it is difficult to generate a large compressive force to compress The packing forms an effective seal, especially when the seawater pressure is high, it cannot prevent a large amount of seawater...

AI Technical Summary

Problems solved by technology

[0003] The packing seal relies on external force to compress the packing to achieve the sealing of the sealing part. Traditionally, this external force is generally realized by people tightening bolts, etc., which has the following disadvantages: 1) Human strength is limited, and it is difficult to generate a large compressive force to compress The packing forms an effective seal, especially when the seawater pressure is high, it cannot prevent a large amount of seawater from entering the cabin; 2) The manual compaction speed is slow, it is difficult to quickly compact the packing, and the seal is not timely; 3) Once the sealing part leaks , form water mist, and it is difficult for personnel to access the sealing packing of the sealing part; 4) If the sealing packing pressing force is too large, it is difficult to ensure the normal use of the transmission shaft, and at the same time accelerate the wear of the sealing packing, which may cause the shaft to be stuck or the packing to be damaged. Friction generates high temperature and damages

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