Ship water-lubricated propeller bearings capable of controlling lateral dynamic excitation of shafting propellers

Abstract

The invention relates to a ship water-lubricated propeller bearing capable of controlling the lateral dynamic excitation of the shafting propeller. It includes a shell and a bearing bush installed in the shell. The bearing bush is an integral structure, and the inner surface line adopts the shape of a vertical waist hole. The lower arc surface of the inner surface of the bearing bush is the load-bearing area of ​​the propeller bearing, the area between the upper arc surface of the inner surface of the bearing bush and the propeller shaft is the flow-through area, and the straight sections in the middle are located on the left and right sides respectively, and are connected to the center of the bearing bush. Both sides of the passed propeller shaft journal are in contact with each other, and together with the propeller bearing and the bottom bearing area, two water cavities are formed, which become the water wedge area of ​​the propeller bearing when the propeller shaft rotates. In the present invention, the straight sections on both sides of the bearing bush are in contact with both sides of the journal of the propeller shaft, constrain the degree of freedom of the propeller shaft in the horizontal direction, improve the lateral support stiffness of the propeller bearing, reduce the unsteady bearing force generated by the propeller and its transmission to the hull structure, and can Effectively control the lateral vibration of the shafting.

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...

AI Technical Summary

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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