Self-adaptive abutting-type stern shaft sealing device

Abstract

The invention discloses a self-adaptive abutting-type stern shaft sealing device. The self-adaptive abutting stern shaft sealing device comprises a stern shaft body, a front end cover, a rear gland and a sealing assembly. According to the self-adaptive abutting-type stern shaft sealing device, the sealing assembly is additionally arranged on a traditional structure, the upper part and the lower part of the middle of the interior of the rear gland are provided with driving grooves separately, a positioning plate is fixedly arranged in the middle of each driving groove, the position between a positioning sleeve of each positioning plate and an extrusion sleeve of a sliding plate is sleeved with a pressing elastic body, in this way, when each pressing elastic body axially pushes the corresponding sliding plate, each sliding plate drives an extrusion ring body to extrude the periphery of the inner end of one sealing ring body, and each sealing ring body is extruded by the corresponding extrusion ring body and then is tightly pressed on the outer side of the periphery of the stern shaft body in the radial directions, so that therefore, the sealing ring bodies are subjected to secondary extrusion, and the sealing structure of the sealing ring bodies and the stern shaft body is greatly improved.

Description

technical field [0001] The invention relates to an adaptive abutting type stern shaft sealing device. Background technique [0002] At present, in the shipbuilding industry, in order to prevent seawater and lake water from infiltrating into the hull along the stern tube, the stern shaft must be strictly sealed to ensure the safety of the ship. The existing seal used for the stern shaft The device is generally sealed by sealing rings at multiple joints, but the existing sealing rings are squeezed and positioned through the gland, so that a tight sealing structure is formed between the sealing ring and the stern shaft. The sealing performance of this structure is It is unreliable. In addition, once the gland is slightly loosened, the sealing of the stern shaft will be affected, which makes the sealing unreliable. Contents of the invention [0003] Aiming at the shortcomings of the above-mentioned prior art, the problem to be solved by the present invention is to provide an ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the shipbuilding industry, in order to prevent seawater and lake water from infiltrating into the hull along the stern tube, the stern shaft must be strictly sealed to ensure the safety of the ship. The existing seal used for the stern shaft The device is generally sealed by sealing rings at multiple joints, but the existing sealing rings are squeezed and positioned through the gland, so that a tight sealing structure is formed between the sealing ring and the stern shaft. The sealing performance of this structure is It is unreliable. In addition, once the gland is slightly loosened, the sealing of the stern shaft will be affected, which makes the sealing unreliable

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