Low noise thrust bearing device for ship

Abstract

The invention relates to a low noise thrust bearing device for a ship. The low noise thrust bearing device comprises a thrust bearing base, thrust bearing assemblies are installed on the thrust bearing base in the axial direction, one end of each thrust bearing assembly is connected with a prime motor through a high elasticity shaft coupling, and the other end of each thrust bearing assembly is connected with a stern shaft; the thrust bearing base is further fixedly connected with a ship body stern structure; multiple longitudinal vibration isolator assemblies are installed among the thrust bearing assemblies and the thrust bearing base and are all arranged in the axial direction; multiple radial vibration isolator supporting and hanging parts used for supporting connection are further installed among the thrust bearing assemblies and the ship body stern structure and are arranged in the radial direction with the thrust bearing assemblies being the center. The thrust bearing assembliesare in circumferential symmetry after the thrust bearing base is assembled, and the nonuniformity of transferring exciting force of a propulsion axis system ship body structure and vibration responsecaused by the nonuniformity are lowered.

Description

technical field [0001] The invention relates to the field of ships, in particular to a low-noise thrust bearing device for ships. Background technique [0002] The propulsion shafting of a ship is mainly composed of a propeller, a stern shaft, a thrust bearing, a highly elastic coupling, a prime mover, and auxiliary shafting devices. In the analysis of the propeller-shaft-hull coupling vibration mechanism, it is found that for the traditional thrust bearing installed on one side, when the unsteady force generated by the propeller due to the non-uniform flow field at the stern is transmitted to the hull through the propulsion shafting, a The corresponding bending moment acts on the hull structure, and it is easy to excite the asymmetric mode vibration of the hull structure. The propulsion shafting plays a role in amplifying the transmission of the excitation force, which is prone to generate low-frequency and high-radiation noise. [0003] The study found that the unsteady ...

AI Technical Summary

Problems solved by technology

In the analysis of the propeller-shaft-hull coupling vibration mechanism, it is found that for the traditional thrust bearing installed on one side, when the unsteady force generated by the propeller due to the non-uniform flow field at the stern is transmitted to the hull through the propulsion shafting, a The corresponding bending moment acts on the hull structure, and it is easy to excite the asymmetric mode vibration of the hull structure. The propulsion shafting plays a role in amplifying the transmission of the excitation force, which is easy to generate low-frequency and high-radiation noise

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