Ship water lubricating propeller bearing capable of controlling transverse dynamic excitation of shaft system propeller

Abstract

The invention relates to a ship water lubricating propeller bearing capable of controlling transverse dynamic excitation of a shaft system propeller. The ship water lubricating propeller bearing capable of controlling the transverse dynamic excitation of the shaft system propeller comprises a shell and a bearing bush installed in the shell, and the bearing bush is of an integrated structure; a vertical type kidney round hole shape is adopted for the inner surface line shape; the lower arc face of the inner surface of the bearing bush is a bearing area of the propeller bearing, and the area between the upper arc face of the inner surface of the bearing bush and a propeller shaft is an overflow area; a middle flat and straight segment is located on the left side and the right side, is in contact with the two sides of a journal of the propeller shaft penetrating through the bearing bush, and forms two water cavities with the propeller bearing and the bottom bearing area; and when the propeller shaft rotates, a water wedge area of the propeller bearing is formed. Straight line segments of the two sides of the bearing bush of the ship water lubricating propeller bearing capable of controlling the transverse dynamic excitation of the shaft system propeller are in contact with the two sides of the journal of the propeller shaft, the freedom degree of the propeller shaft in the horizontal direction is restrained, the transverse bearing rigidity of the propeller bearing is improved, the non-steady bearing force generated by the propeller and transmission of the non-steady bearing force to a ship body structure are reduced, and the shaft system transverse vibration can be effectively controlled.

Description

technical field [0001] The invention relates to the technical field of ship main shaft propeller bearings, in particular to a water-lubricated propeller bearing with a lateral dynamic excitation control function of the shaft propeller. Background technique [0002] The propeller bearing is an important equipment for the propulsion shafting of the ship. It supports the weight of the propeller and the propeller shaft, ensures the normal rotation of the shafting, and thus generates forward power. Since the propeller is installed as a large mass at the tail end of the propeller shaft, the "propeller-propeller shaft-propeller bearing" forms a cantilever beam rotor system, which generates lateral vibration when the shaft system is running, and passes through each support including the propeller bearing. The bearing transmits to the hull base and hull structure, causing hull vibration and sound radiation. [0003] According to the characteristics and laws of shafting lateral (circ...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a controllable propeller bearing in the existing ship stern with relatively large running clearance in the horizontal direction of the bearing in the prior art, weak constraints, and unfavorable lateral vibration control of the shaft system. The ship's water-lubricated propeller bearing with transverse dynamic excitation of the shafting propeller is installed at the tail end of the main propulsion shafting propeller shaft and the front of the propeller to support the propeller shaft and the propeller to ensure the normal operation of the shafting system and increase the transverse direction of the propeller shaft. Constraint, control the rotation deflection of the propeller and shafting, reduce the transmission of lateral vibration, so as to achieve the purpose of controlling the vibration and sound radiation of the hull structure caused by the propulsion shafting

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