Active thrust balance type shafting longitudinal vibration reduction device

Abstract

The invention discloses an active thrust balance type shafting longitudinal vibration reduction device. The active thrust balance type shafting longitudinal vibration reduction device comprises a shell, a thrust block mounted in the shell, a longitudinal vibration reduction structure opposite to the thrust block, a hydraulic pipeline configured with the vibration reduction structure, a hydraulic machine and a thrust detection control module, wherein the shell is mounted on a thrust shaft in a sleeving manner, and the shell and the thrust shaft are configured in a sealed manner. The thrust block and the thrust shaft are connected in an abutting manner. The longitudinal vibration reduction structure comprises a piston cylinder, a piston rod, a vibration reduction element and a piston cylinder end cover. One end of the piston rod stretches out of the piston cylinder and is connected with the thrust block in an abutting manner, and the other end of the piston rod is arranged in the pistoncylinder. One end of the vibration reduction element is connected with the piston rod in an abutting manner, and the other end of the vibration reduction element is connected with the piston cylinderend cover in an abutting manner. By means of the device, counter equivalent static thrust is provided in a cabin, static thrust brought by a propeller and deepwater pressure to shafting is compensated, the vibration reduction element only transmits and attenuates pulsation exciting force of the proper, and longitudinal vibration control over a propeller shaft system is expanded to large amplitudeand low frequency.

Description

technical field [0001] The invention relates to a main shaft system equipment of a ship, in particular to an active thrust balance type shaft system longitudinal vibration damping device. Background technique [0002] Longitudinal vibration of the propulsion system is one of the important sources of low-frequency vibration and noise at the stern of a ship. This kind of vibration is mainly low-frequency, and its strength is closely related to the dynamic characteristics of the shafting. The longitudinal vibration of the propulsion system caused by the excitation force of the propeller and its coupled vibration with the hull stern structure are controlled. The thrust transmission channel of the ship shafting is also the transmission channel of the propeller pulsation excitation force. The longitudinal vibration control of the shafting is generally to connect the vibration damping structure in series on the thrust transmission channel. While transmitting the static thrust of th...

AI Technical Summary

Problems solved by technology

[0006] The contradiction between the above-mentioned low dynamic stiffness and low longitudinal displacement has become the bottleneck of passive vibration isolation technology of the shaft system, which limits the low-frequency vibration isolation control range and application effect of the propeller shaft system

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