Semi-active vibration control device for ship shafting

Abstract

The invention provides a semi-active vibration control device for a ship shafting. The semi-active vibration control device for the ship shafting comprises a stator (1) and a rotor (2). The stator (1)and the rotor (2) are connected through rollers (3) and transmit radial and longitudinal loads to each other through the rollers (3). The stator (1) comprises a thrust bearing outer ring (1-1), an outer sleeve pipe (1-2), coils (1-3) and an outer sleeve pipe magnetism-shielding layer (1-4), wherein the coils (1-3) and the outer sleeve pipe magnetism-shielding layer (1-4) are arranged in the outersleeve pipe (1-2), the outer sleeve pipe (1-2) is stably connected with the thrust bearing outer ring (1-1), and the thrust bearing outer ring (1-1) is stably connected with a base. The rotor (2) rotates along with a thrust shaft. According to the semi-active vibration control device for the ship shafting, the overall structural arrangement of a magneto-rheological damper is designed, and the magneto-rheological damper works in cooperation with a roller thrust bearing, so that vibration of the ship shafting is reduced.

Description

technical field [0001] The invention belongs to the field of vibration reduction of ship shafting, in particular to a semi-active vibration control device for ship shafting. Background technique [0002] Ship shafting is one of the important components of ship power plant. The quality of the shafting will directly affect the propulsion characteristics and normal navigation of the ship, and also have a direct impact on the normal operation of the main engine of the ship. If the design quality of the shaft system is not good, it will cause accidents such as body vibration, damage to transmission system components, excessive wear of bearings, and even shaft breakage. [0003] When the ship's propulsion shafting is in operation, it will inevitably vibrate due to the joint influence of various factors such as propeller hydrodynamic force and hull deformation. Shafting vibration is divided into three types: torsional vibration, longitudinal vibration and circular vibration. [...

AI Technical Summary

Problems solved by technology

With the increasing size and complexity of ships, as well as different driving sea areas and complex sea conditions, the vibration of ship shafting becomes more complex, and the traditional passive vibration reduction of shafting becomes more difficult to meet the demand

[0008] Although the conventional ship shafting passive vibration reduction method is simple in structure, easy to maintain, and does not require external energy, it lacks tracking and adjustment capabilities and relies on the general characteristics of external loads and the dynamic characteristics of the structure.

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